X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fgame%2Fg_grid.pas;h=280fd90f3fd967f0753a31ee69cb6386ceb5fd05;hb=254041134b399e948e554ae99171174a7087ae40;hp=9b99c7c976f9bf2f8796cab8b17e330db26ad5ff;hpb=2ff5661baacfc6518e7cfad0e85a88f16f5f5d2a;p=d2df-sdl.git diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas index 9b99c7c..280fd90 100644 --- a/src/game/g_grid.pas +++ b/src/game/g_grid.pas @@ -15,10 +15,18 @@ *) // universal spatial grid {$INCLUDE ../shared/a_modes.inc} +{$IF DEFINED(D2F_DEBUG)} + {.$DEFINE D2F_DEBUG_RAYTRACE} + {.$DEFINE D2F_DEBUG_XXQ} + {.$DEFINE D2F_DEBUG_MOVER} +{$ENDIF} +{.$DEFINE GRID_USE_ORTHO_ACCEL} unit g_grid; interface +const + GridTileSize = 32; // must be power of two! type TBodyProxyId = Integer; @@ -27,17 +35,16 @@ type public type TGridQueryCB = function (obj: ITP; tag: Integer): Boolean is nested; // return `true` to stop type TGridRayQueryCB = function (obj: ITP; tag: Integer; x, y, prevx, prevy: Integer): Boolean is nested; // return `true` to stop - type TGridAlongQueryCB = function (obj: ITP; tag: Integer): Boolean is nested; // return `true` to stop + type TCellQueryCB = procedure (x, y: Integer) is nested; // top-left cell corner coords const TagDisabled = $40000000; const TagFullMask = $3fffffff; private const - GridDefaultTileSize = 32; GridCellBucketSize = 8; // WARNING! can't be less than 2! - private + public type PBodyProxyRec = ^TBodyProxyRec; TBodyProxyRec = record @@ -50,25 +57,69 @@ type private procedure setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer); + + function getTag (): Integer; inline; + procedure setTag (v: Integer); inline; + + function getEnabled (): Boolean; inline; + procedure setEnabled (v: Boolean); inline; + + function getX1 (): Integer; inline; + function getY1 (): Integer; inline; + + public + property x: Integer read mX; + property y: Integer read mY; + property width: Integer read mWidth; + property height: Integer read mHeight; + property tag: Integer read getTag write setTag; + property enabled: Boolean read getEnabled write setEnabled; + property obj: ITP read mObj; + + property x0: Integer read mX; + property y0: Integer read mY; + property x1: Integer read getX1; + property y1: Integer read getY1; end; + private + type PGridCell = ^TGridCell; TGridCell = record bodies: array [0..GridCellBucketSize-1] of Integer; // -1: end of list next: Integer; // in this cell; index in mCells end; + TCellArray = array of TGridCell; + TGridInternalCB = function (grida: Integer; bodyId: TBodyProxyId): Boolean of object; // return `true` to stop private //mTileSize: Integer; - const mTileSize = GridDefaultTileSize; + const mTileSize = GridTileSize; + type TGetProxyFn = function (pxidx: Integer): PBodyProxyRec of object; + + public + const tileSize = mTileSize; + + type + TAtPointEnumerator = record + private + mCells: TCellArray; + curidx, curbki: Integer; + getpx: TGetProxyFn; + public + constructor Create (acells: TCellArray; aidx: Integer; agetpx: TGetProxyFn); + function MoveNext (): Boolean; inline; + function getCurrent (): PBodyProxyRec; inline; + property Current: PBodyProxyRec read getCurrent; + end; private mMinX, mMinY: Integer; // so grids can start at any origin mWidth, mHeight: Integer; // in tiles mGrid: array of Integer; // mWidth*mHeight, index in mCells - mCells: array of TGridCell; // cell pool + mCells: TCellArray; // cell pool mFreeCell: Integer; // first free cell index or -1 mLastQuery: LongWord; mUsedCells: Integer; @@ -76,9 +127,13 @@ type mProxyFree: TBodyProxyId; // free mProxyCount: Integer; // currently used mProxyMaxCount: Integer; + mInQuery: Boolean; public dbgShowTraceLog: Boolean; + {$IF DEFINED(D2F_DEBUG)} + dbgRayTraceTileHitCB: TCellQueryCB; + {$ENDIF} private function allocCell (): Integer; @@ -87,9 +142,6 @@ type function allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId; procedure freeProxy (body: TBodyProxyId); - procedure insertInternal (body: TBodyProxyId); - procedure removeInternal (body: TBodyProxyId); - function forGridRect (x, y, w, h: Integer; cb: TGridInternalCB; bodyId: TBodyProxyId): Boolean; function inserter (grida: Integer; bodyId: TBodyProxyId): Boolean; @@ -101,6 +153,8 @@ type function getGridWidthPx (): Integer; inline; function getGridHeightPx (): Integer; inline; + function getProxyById (idx: TBodyProxyId): PBodyProxyRec; inline; + public constructor Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer{; aTileSize: Integer=GridDefaultTileSize}); destructor Destroy (); override; @@ -108,14 +162,16 @@ type function insertBody (aObj: ITP; ax, ay, aWidth, aHeight: Integer; aTag: Integer=-1): TBodyProxyId; procedure removeBody (body: TBodyProxyId); // WARNING! this WILL destroy proxy! - procedure moveBody (body: TBodyProxyId; dx, dy: Integer); - procedure resizeBody (body: TBodyProxyId; sx, sy: Integer); - procedure moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer); + procedure moveBody (body: TBodyProxyId; nx, ny: Integer); + procedure resizeBody (body: TBodyProxyId; nw, nh: Integer); + procedure moveResizeBody (body: TBodyProxyId; nx, ny, nw, nh: Integer); function insideGrid (x, y: Integer): Boolean; inline; // `false` if `body` is surely invalid function getBodyXY (body: TBodyProxyId; out rx, ry: Integer): Boolean; inline; + function getBodyWH (body: TBodyProxyId; out rw, rh: Integer): Boolean; inline; + function getBodyDims (body: TBodyProxyId; out rx, ry, rw, rh: Integer): Boolean; inline; //WARNING: don't modify grid while any query is in progress (no checks are made!) // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) @@ -124,23 +180,54 @@ type //WARNING: don't modify grid while any query is in progress (no checks are made!) // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) - // no callback: return `true` on the first hit - function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; + // no callback: return object on the first hit or nil + function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP; + + function atCellInPoint (x, y: Integer): TAtPointEnumerator; + + //WARNING: don't modify grid while any query is in progress (no checks are made!) + // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) + // cb with `(nil)` will be called before processing new tile + // no callback: return object of the nearest hit or nil + // if `inverted` is true, trace will register bodies *exluding* tagmask + //WARNING: don't change tags in callbacks here! + function traceRayOld (const x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; overload; + function traceRayOld (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; //WARNING: don't modify grid while any query is in progress (no checks are made!) // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) // cb with `(nil)` will be called before processing new tile - // no callback: return `true` on the nearest hit - function traceRay (x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; overload; - function traceRay (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; + // no callback: return object of the nearest hit or nil + // if `inverted` is true, trace will register bodies *exluding* tagmask + // `cb` is used unconvetionally here: if it returns `false`, tracer will ignore the object + //WARNING: don't change tags in callbacks here! + function traceRay (const x0, y0, x1, y1: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; overload; + function traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; + + // return `false` if we're still inside at the end + // line should be either strict horizontal, or strict vertical, otherwise an exception will be thrown + // `true`: endpoint will point at the last "inside" pixel + // `false`: endpoint will be (ax1, ay1) + //WARNING: don't change tags in callbacks here! + function traceOrthoRayWhileIn (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): Boolean; //WARNING: don't modify grid while any query is in progress (no checks are made!) // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) // trace line along the grid, calling `cb` for all objects in passed cells, in no particular order - function forEachAlongLine (x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1): ITP; + //WARNING: don't change tags in callbacks here! + function forEachAlongLine (ax0, ay0, ax1, ay1: Integer; cb: TGridQueryCB; tagmask: Integer=-1; log: Boolean=false): ITP; + + // trace box with the given velocity; return object hit (if any) + // `cb` is used unconvetionally here: if it returns `false`, tracer will ignore the object + //WARNING: don't change tags in callbacks here! + function traceBox (out ex, ey: Integer; const ax0, ay0, aw, ah: Integer; const dx, dy: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; + // debug + procedure forEachBodyCell (body: TBodyProxyId; cb: TCellQueryCB); + function forEachInCell (x, y: Integer; cb: TGridQueryCB): ITP; procedure dumpStats (); + public //WARNING! no sanity checks! property proxyEnabled[pid: TBodyProxyId]: Boolean read getProxyEnabled write setProxyEnabled; @@ -148,6 +235,61 @@ type property gridY0: Integer read mMinY; property gridWidth: Integer read getGridWidthPx; // in pixels property gridHeight: Integer read getGridHeightPx; // in pixels + + property proxy[idx: TBodyProxyId]: PBodyProxyRec read getProxyById; + end; + + +type + // common structure for all line tracers + TLineWalker = record + public + const TileSize = GridTileSize; + + private + wx0, wy0, wx1, wy1: Integer; // window coordinates + stx, sty: Integer; // "steps" for x and y axes + dx2, dy2: Integer; // "double lengthes" for x and y axes + xd, yd: Integer; // current coord + e: Integer; // "error" (as in bresenham algo) + term: Integer; // end for xd (xd = term: done) + //xptr, yptr: PInteger; + xyswapped: Boolean; // true: xd is y + + public + // call `setyp` after this + constructor Create (minx, miny, maxx, maxy: Integer); + + procedure setClip (minx, miny, maxx, maxy: Integer); inline; + + // this will use `w[xy][01]` to clip coords + // return `false` if the whole line was clipped away + // on `true`, you should process first point, and go on + function setup (x0, y0, x1, y1: Integer): Boolean; + + // call this *after* doing a step + // WARNING! if you will do a step when this returns `true`, you will fall into limbo + function done (): Boolean; inline; + + // as you will prolly call `done()` after doing a step anyway, this will do it for you + // move to next point, return `true` when the line is complete (i.e. you should stop) + function step (): Boolean; inline; + + // move to next tile; return `true` if the line is complete (and walker state is undefined then) + function stepToNextTile (): Boolean; inline; + + // hack for line-vs-aabb; NOT PROPERLY TESTED! + procedure getPrevXY (out ox, oy: Integer); inline; + + // current coords + function x (): Integer; inline; + function y (): Integer; inline; + + procedure getXY (out ox, oy: Integer); inline; + + // move directions; always [-1..1] (can be zero!) + function dx (): Integer; inline; + function dy (): Integer; inline; end; @@ -157,22 +299,310 @@ type // if result is `false`, `inx` and `iny` are undefined function lineAABBIntersects (x0, y0, x1, y1: Integer; bx, by, bw, bh: Integer; out inx, iny: Integer): Boolean; -procedure swapInt (var a: Integer; var b: Integer); inline; +// sweep two AABB's to see if and when they are overlapping +// returns `true` if collision was detected (but boxes doesn't overlap) +// u1 and u1 has no sense if no collision was detected +// u0 = normalized time of first collision (i.e. collision starts at myMove*u0) +// u1 = normalized time of second collision (i.e. collision stops after myMove*u1) +// hitedge for `it`: 0: top; 1: right; 2: bottom; 3: left +// enter/exit coords will form non-intersecting configuration (i.e. will be before/after the actual collision) +function sweepAABB (mex0, mey0, mew, meh: Integer; medx, medy: Integer; itx0, ity0, itw, ith: Integer; + u0: PSingle=nil; hitedge: PInteger=nil; u1: PSingle=nil): Boolean; + function distanceSq (x0, y0, x1, y1: Integer): Integer; inline; +procedure swapInt (var a: Integer; var b: Integer); inline; +//function minInt (a, b: Integer): Integer; inline; +//function maxInt (a, b: Integer): Integer; inline; + implementation uses - SysUtils, e_log; + SysUtils, e_log, g_console, utils; // ////////////////////////////////////////////////////////////////////////// // procedure swapInt (var a: Integer; var b: Integer); inline; var t: Integer; begin t := a; a := b; b := t; end; +//procedure swapInt (var a: Integer; var b: Integer); inline; begin a := a xor b; b := b xor a; a := a xor b; end; +//function minInt (a, b: Integer): Integer; inline; begin if (a < b) then result := a else result := b; end; +//function maxInt (a, b: Integer): Integer; inline; begin if (a > b) then result := a else result := b; end; function distanceSq (x0, y0, x1, y1: Integer): Integer; inline; begin result := (x1-x0)*(x1-x0)+(y1-y0)*(y1-y0); end; +// ////////////////////////////////////////////////////////////////////////// // +constructor TLineWalker.Create (minx, miny, maxx, maxy: Integer); +begin + setClip(minx, miny, maxx, maxy); +end; + +procedure TLineWalker.setClip (minx, miny, maxx, maxy: Integer); inline; +begin + // clip rectange + wx0 := minx; + wy0 := miny; + wx1 := maxx; + wy1 := maxy; +end; + +function TLineWalker.done (): Boolean; inline; begin result := (xd = term); end; + +function TLineWalker.step (): Boolean; inline; +begin + if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2; + xd += stx; + result := (xd = term); +end; + +function TLineWalker.stepToNextTile (): Boolean; inline; +var + ex, ey: Integer; + xwalk, ywalk, wklen: Integer; // to the respective edges + lstx, lsty, lterm: Integer; + le, ldx2, ldy2: Integer; + lxd, lyd: Integer; + f: Integer; +begin + result := false; + + lstx := stx; + lsty := sty; + lterm := term; + lxd := xd; + + // ortho? + if (lsty = 0) then + begin + // only xd + //assert(lsty <> 0); + if (lstx < 0) then + begin + // xd: to left edge + xd := (lxd and (not (TileSize-1)))-1; + result := (lxd <= lterm); + exit; + end + else + begin + // xd: to right edge + xd := (lxd or (TileSize-1))+1; + result := (lxd >= lterm); + exit; + end; + end; + + // not ortho + //assert(lstx <> 0); // invariant + + lyd := yd; + le := e; + ldx2 := dx2; + ldy2 := dy2; + + // calculate xwalk + if (lstx < 0) then + begin + ex := (lxd and (not (TileSize-1)))-1; + xwalk := lxd-ex; + end + else + begin + ex := (lxd or (TileSize-1))+1; + xwalk := ex-lxd; + end; + + // calculate ywalk + if (lsty < 0) then + begin + ey := (lyd and (not (TileSize-1)))-1; + ywalk := lyd-ey; + end + else + begin + ey := (lyd or (TileSize-1))+1; + ywalk := ey-lyd; + end; + + while true do + begin + // in which dir we want to walk? + if (xwalk <= ywalk) then wklen := xwalk else wklen := ywalk; + // walk x + if (lstx < 0) then + begin + lxd -= wklen; + if (lxd <= lterm) then begin xd := lxd; result := true; exit; end; + end + else + begin + lxd += wklen; + if (lxd >= lterm) then begin xd := lxd; result := true; exit; end; + end; + // walk y + for f := 1 to wklen do if (le >= 0) then begin lyd += lsty; le -= ldx2; end else le += ldy2; + if (lxd = ex) or (lyd = ey) then break; + xwalk -= wklen; if (xwalk = 0) then xwalk := TileSize; + ywalk -= wklen; if (ywalk = 0) then ywalk := TileSize; + end; + //assert((xd div TileSize <> lxd div TileSize) or (yd div TileSize <> lyd div TileSize)); + xd := lxd; + yd := lyd; + e := le; +end; + +// NOT TESTED! +procedure TLineWalker.getPrevXY (out ox, oy: Integer); inline; +begin + //writeln('e=', e, '; dx2=', dx2, '; dy2=', dy2); + if xyswapped then + begin + if (e >= 0) then ox := yd-sty else ox := yd; + oy := xd-stx; + end + else + begin + if (e >= 0) then oy := yd-sty else oy := yd; + ox := xd-stx; + end; +end; + +function TLineWalker.x (): Integer; inline; begin if xyswapped then result := yd else result := xd; end; +function TLineWalker.y (): Integer; inline; begin if xyswapped then result := xd else result := yd; end; +procedure TLineWalker.getXY (out ox, oy: Integer); inline; begin if xyswapped then begin ox := yd; oy := xd; end else begin ox := xd; oy := yd; end; end; + +function TLineWalker.dx (): Integer; inline; begin if xyswapped then result := stx else result := sty; end; +function TLineWalker.dy (): Integer; inline; begin if xyswapped then result := sty else result := stx; end; + +function TLineWalker.setup (x0, y0, x1, y1: Integer): Boolean; + procedure swapInt (var a: Integer; var b: Integer); inline; begin a := a xor b; b := b xor a; a := a xor b; end; +var + dsx, dsy: Integer; // "lengthes" for x and y axes + rem: Integer; + xfixed: Boolean; + temp: Integer; +begin + result := false; + xyswapped := false; + + // horizontal setup + if (x0 < x1) then + begin + // from left to right + if (x0 > wx1) or (x1 < wx0) then exit; // out of screen + stx := 1; // going right + end + else + begin + // from right to left + if (x1 > wx1) or (x0 < wx0) then exit; // out of screen + stx := -1; // going left + x0 := -x0; + x1 := -x1; + wx0 := -wx0; + wx1 := -wx1; + swapInt(wx0, wx1); + end; + + // vertical setup + if (y0 < y1) then + begin + // from top to bottom + if (y0 > wy1) or (y1 < wy0) then exit; // out of screen + sty := 1; // going down + end + else + begin + // from bottom to top + if (y1 > wy1) or (y0 < wy0) then exit; // out of screen + sty := -1; // going up + y0 := -y0; + y1 := -y1; + wy0 := -wy0; + wy1 := -wy1; + swapInt(wy0, wy1); + end; + + dsx := x1-x0; + dsy := y1-y0; + + if (dsx < dsy) then + begin + xyswapped := true; + //xptr := @yd; + //yptr := @xd; + swapInt(x0, y0); + swapInt(x1, y1); + swapInt(dsx, dsy); + swapInt(wx0, wy0); + swapInt(wx1, wy1); + swapInt(stx, sty); + end + else + begin + //xptr := @xd; + //yptr := @yd; + end; + + dx2 := 2*dsx; + dy2 := 2*dsy; + xd := x0; + yd := y0; + e := 2*dsy-dsx; + term := x1; + + xfixed := false; + if (y0 < wy0) then + begin + // clip at top + temp := dx2*(wy0-y0)-dsx; + xd += temp div dy2; + rem := temp mod dy2; + if (xd > wx1) then exit; // x is moved out of clipping rect, nothing to do + if (xd+1 >= wx0) then + begin + yd := wy0; + e -= rem+dsx; + //if (rem > 0) then begin Inc(xd); e += dy2; end; //BUGGY + if (xd < wx0) then begin xd += 1; e += dy2; end; //??? + xfixed := true; + end; + end; + + if (not xfixed) and (x0 < wx0) then + begin + // clip at left + temp := dy2*(wx0-x0); + yd += temp div dx2; + rem := temp mod dx2; + if (yd > wy1) or (yd = wy1) and (rem >= dsx) then exit; + xd := wx0; + e += rem; + if (rem >= dsx) then begin Inc(yd); e -= dx2; end; + end; + + if (y1 > wy1) then + begin + // clip at bottom + temp := dx2*(wy1-y0)+dsx; + term := x0+temp div dy2; + rem := temp mod dy2; + if (rem = 0) then Dec(term); + end; + + if (term > wx1) then term := wx1; // clip at right + + Inc(term); // draw last point (it is ok to inc here, as `term` sign will be changed later + //if (term = xd) then exit; // this is the only point, get out of here + + if (sty = -1) then yd := -yd; + if (stx = -1) then begin xd := -xd; term := -term; end; + dx2 -= dy2; + + result := true; +end; + + // ////////////////////////////////////////////////////////////////////////// // // you are not supposed to understand this // returns `true` if there is an intersection, and enter coords @@ -291,7 +721,8 @@ begin begin yd := wy0; e -= rem+dsx; - if (rem > 0) then begin Inc(xd); e += dy2; end; + //if (rem > 0) then begin Inc(xd); e += dy2; end; //BUGGY + if (xd < wx0) then begin xd += 1; e += dy2; end; //??? xfixed := true; end; end; @@ -335,29 +766,177 @@ end; // ////////////////////////////////////////////////////////////////////////// // -procedure TBodyGridBase.TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer); -begin - mX := aX; - mY := aY; - mWidth := aWidth; - mHeight := aHeight; - mQueryMark := 0; - mObj := aObj; - mTag := aTag; - nextLink := -1; -end; +function sweepAABB (mex0, mey0, mew, meh: Integer; medx, medy: Integer; itx0, ity0, itw, ith: Integer; + u0: PSingle=nil; hitedge: PInteger=nil; u1: PSingle=nil): Boolean; +var + tin, tout: Single; + function axisOverlap (me0, me1, it0, it1, d, he0, he1: Integer): Boolean; inline; + var + t: Single; + begin + result := false; -// ////////////////////////////////////////////////////////////////////////// // -constructor TBodyGridBase.Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer{; aTileSize: Integer=GridDefaultTileSize}); -var - idx: Integer; -begin - dbgShowTraceLog := false; - { - if aTileSize < 1 then aTileSize := 1; - if aTileSize > 8192 then aTileSize := 8192; // arbitrary limit - mTileSize := aTileSize; + if (me1 < it0) then + begin + if (d >= 0) then exit; // oops, no hit + t := (me1-it0+1)/d; + if (t > tin) then begin tin := t; hitedge^ := he1; end; + end + else if (it1 < me0) then + begin + if (d <= 0) then exit; // oops, no hit + t := (me0-it1-1)/d; + if (t > tin) then begin tin := t; hitedge^ := he0; end; + end; + + if (d < 0) and (it1 > me0) then + begin + t := (me0-it1-1)/d; + if (t < tout) then tout := t; + end + else if (d > 0) and (me1 > it0) then + begin + t := (me1-it0+1)/d; + if (t < tout) then tout := t; + end; + + result := true; + end; + +var + mex1, mey1, itx1, ity1, vx, vy: Integer; + htt: Integer = -1; +begin + result := false; + if (u0 <> nil) then u0^ := -1.0; + if (u1 <> nil) then u1^ := -1.0; + if (hitedge = nil) then hitedge := @htt else hitedge^ := -1; + + if (mew < 1) or (meh < 1) or (itw < 1) or (ith < 1) then exit; + + mex1 := mex0+mew-1; + mey1 := mey0+meh-1; + itx1 := itx0+itw-1; + ity1 := ity0+ith-1; + + // check if they are overlapping right now (SAT) + //if (mex1 >= itx0) and (mex0 <= itx1) and (mey1 >= ity0) and (mey0 <= ity1) then begin result := true; exit; end; + + if (medx = 0) and (medy = 0) then exit; // both boxes are sationary + + // treat b as stationary, so invert v to get relative velocity + vx := -medx; + vy := -medy; + + tin := -100000000.0; + tout := 100000000.0; + + if not axisOverlap(mex0, mex1, itx0, itx1, vx, 1, 3) then exit; + if not axisOverlap(mey0, mey1, ity0, ity1, vy, 2, 0) then exit; + + if (u0 <> nil) then u0^ := tin; + if (u1 <> nil) then u1^ := tout; + + if (tin <= tout) and (tin >= 0.0) and (tin <= 1.0) then + begin + result := true; + end; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +procedure TBodyGridBase.TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer); +begin + mX := aX; + mY := aY; + mWidth := aWidth; + mHeight := aHeight; + mQueryMark := 0; + mObj := aObj; + mTag := aTag; + nextLink := -1; +end; + + +function TBodyGridBase.TBodyProxyRec.getTag (): Integer; inline; +begin + result := mTag and TagFullMask; +end; + +procedure TBodyGridBase.TBodyProxyRec.setTag (v: Integer); inline; +begin + mTag := (mTag and TagDisabled) or (v and TagFullMask); +end; + +function TBodyGridBase.TBodyProxyRec.getEnabled (): Boolean; inline; +begin + result := ((mTag and TagDisabled) = 0); +end; + +procedure TBodyGridBase.TBodyProxyRec.setEnabled (v: Boolean); inline; +begin + if v then mTag := mTag and (not TagDisabled) else mTag := mTag or TagDisabled; +end; + +function TBodyGridBase.TBodyProxyRec.getX1 (): Integer; inline; +begin + result := mX+mWidth-1; +end; + +function TBodyGridBase.TBodyProxyRec.getY1 (): Integer; inline; +begin + result := mY+mHeight-1; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +constructor TBodyGridBase.TAtPointEnumerator.Create (acells: TCellArray; aidx: Integer; agetpx: TGetProxyFn); +begin + mCells := acells; + curidx := aidx; + curbki := -1; + getpx := agetpx; +end; + + +function TBodyGridBase.TAtPointEnumerator.MoveNext (): Boolean; inline; +begin + while (curidx <> -1) do + begin + while (curbki < GridCellBucketSize) do + begin + Inc(curbki); + if (mCells[curidx].bodies[curbki] = -1) then break; + result := true; + exit; + end; + curidx := mCells[curidx].next; + curbki := -1; + end; + result := false; +end; + + +function TBodyGridBase.TAtPointEnumerator.getCurrent (): PBodyProxyRec; inline; +begin + result := getpx(mCells[curidx].bodies[curbki]); +end; + + +// ////////////////////////////////////////////////////////////////////////// // +constructor TBodyGridBase.Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer{; aTileSize: Integer=GridDefaultTileSize}); +var + idx: Integer; +begin + dbgShowTraceLog := false; + {$IF DEFINED(D2F_DEBUG)} + dbgRayTraceTileHitCB := nil; + {$ENDIF} + { + if aTileSize < 1 then aTileSize := 1; + if aTileSize > 8192 then aTileSize := 8192; // arbitrary limit + mTileSize := aTileSize; } if (aPixWidth < mTileSize) then aPixWidth := mTileSize; if (aPixHeight < mTileSize) then aPixHeight := mTileSize; @@ -373,6 +952,7 @@ begin for idx := 0 to High(mCells) do begin mCells[idx].bodies[0] := -1; + mCells[idx].bodies[GridCellBucketSize-1] := -1; // "has free room" flag mCells[idx].next := idx+1; end; mCells[High(mCells)].next := -1; // last cell @@ -402,17 +982,17 @@ end; // ////////////////////////////////////////////////////////////////////////// // procedure TBodyGridBase.dumpStats (); var - idx, mcb, cidx, cnt: Integer; + idx, mcb, ccidx, cnt: Integer; begin mcb := 0; for idx := 0 to High(mGrid) do begin - cidx := mGrid[idx]; + ccidx := mGrid[idx]; cnt := 0; - while cidx >= 0 do + while ccidx >= 0 do begin Inc(cnt); - cidx := mCells[cidx].next; + ccidx := mCells[ccidx].next; end; if (mcb < cnt) then mcb := cnt; end; @@ -420,6 +1000,55 @@ begin end; +procedure TBodyGridBase.forEachBodyCell (body: TBodyProxyId; cb: TCellQueryCB); +var + g, f, ccidx: Integer; + cc: PGridCell; +begin + if (body < 0) or (body > High(mProxies)) or not assigned(cb) then exit; + for g := 0 to High(mGrid) do + begin + ccidx := mGrid[g]; + while (ccidx <> -1) do + begin + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do + begin + if (cc.bodies[f] = -1) then break; + if (cc.bodies[f] = body) then cb((g mod mWidth)*mTileSize+mMinX, (g div mWidth)*mTileSize+mMinY); + end; + // next cell + ccidx := cc.next; + end; + end; +end; + + +function TBodyGridBase.forEachInCell (x, y: Integer; cb: TGridQueryCB): ITP; +var + f, ccidx: Integer; + cc: PGridCell; +begin + result := Default(ITP); + if not assigned(cb) then exit; + Dec(x, mMinX); + Dec(y, mMinY); + if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y > mHeight*mTileSize) then exit; + ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)]; + while (ccidx <> -1) do + begin + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do + begin + if (cc.bodies[f] = -1) then break; + if cb(mProxies[cc.bodies[f]].mObj, mProxies[cc.bodies[f]].mTag) then begin result := mProxies[cc.bodies[f]].mObj; exit; end; + end; + // next cell + ccidx := cc.next; + end; +end; + + // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.getGridWidthPx (): Integer; inline; begin result := mWidth*mTileSize; end; function TBodyGridBase.getGridHeightPx (): Integer; inline; begin result := mHeight*mTileSize; end; @@ -450,16 +1079,51 @@ begin end; +function TBodyGridBase.getBodyWH (body: TBodyProxyId; out rw, rh: Integer): Boolean; inline; +begin + if (body >= 0) and (body < Length(mProxies)) then + begin + with mProxies[body] do begin rw := mWidth; rh := mHeight; end; + result := true; + end + else + begin + rw := 0; + rh := 0; + result := false; + end; +end; + + +function TBodyGridBase.getBodyDims (body: TBodyProxyId; out rx, ry, rw, rh: Integer): Boolean; inline; +begin + if (body >= 0) and (body < Length(mProxies)) then + begin + with mProxies[body] do begin rx := mX; ry := mY; rw := mWidth; rh := mHeight; end; + result := true; + end + else + begin + rx := 0; + ry := 0; + rw := 0; + rh := 0; + result := false; + end; +end; + + + // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.getProxyEnabled (pid: TBodyProxyId): Boolean; inline; begin - if (pid >= 0) then result := ((mProxies[pid].mTag and TagDisabled) = 0) else result := false; + if (pid >= 0) and (pid < Length(mProxies)) then result := ((mProxies[pid].mTag and TagDisabled) = 0) else result := false; end; procedure TBodyGridBase.setProxyEnabled (pid: TBodyProxyId; val: Boolean); inline; begin - if (pid >= 0) then + if (pid >= 0) and (pid < Length(mProxies)) then begin if val then begin @@ -473,10 +1137,17 @@ begin end; +function TBodyGridBase.getProxyById (idx: TBodyProxyId): PBodyProxyRec; inline; +begin + if (idx >= 0) and (idx < Length(mProxies)) then result := @mProxies[idx] else result := nil; +end; + + // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.allocCell (): Integer; var idx: Integer; + pc: PGridCell; begin if (mFreeCell < 0) then begin @@ -486,14 +1157,15 @@ begin for idx := mFreeCell to High(mCells) do begin mCells[idx].bodies[0] := -1; + mCells[idx].bodies[GridCellBucketSize-1] := -1; // 'has free room' flag mCells[idx].next := idx+1; end; mCells[High(mCells)].next := -1; // last cell end; result := mFreeCell; - mFreeCell := mCells[result].next; - mCells[result].next := -1; - mCells[result].bodies[0] := -1; + pc := @mCells[result]; + mFreeCell := pc.next; + pc.next := -1; Inc(mUsedCells); //e_WriteLog(Format('grid: allocated new cell #%d (total: %d)', [result, mUsedCells]), MSG_NOTIFY); end; @@ -503,9 +1175,12 @@ procedure TBodyGridBase.freeCell (idx: Integer); begin if (idx >= 0) and (idx < Length(mCells)) then begin - //if mCells[idx].body = -1 then exit; // the thing that should not be - mCells[idx].bodies[0] := -1; - mCells[idx].next := mFreeCell; + with mCells[idx] do + begin + bodies[0] := -1; + bodies[GridCellBucketSize-1] := -1; // 'has free room' flag + next := mFreeCell; + end; mFreeCell := idx; Dec(mUsedCells); end; @@ -553,11 +1228,10 @@ end; // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.forGridRect (x, y, w, h: Integer; cb: TGridInternalCB; bodyId: TBodyProxyId): Boolean; -const - tsize = mTileSize; var - gx, gy: Integer; gw, gh: Integer; + ex, ey: Integer; + gx, gy: Integer; begin result := false; if (w < 1) or (h < 1) or not assigned(cb) then exit; @@ -568,16 +1242,22 @@ begin if (x+w <= 0) or (y+h <= 0) then exit; gw := mWidth; gh := mHeight; - //tsize := mTileSize; - if (x >= gw*tsize) or (y >= gh*tsize) then exit; - for gy := y div tsize to (y+h-1) div tsize do + if (x >= gw*mTileSize) or (y >= gh*mTileSize) then exit; + ex := (x+w-1) div mTileSize; + ey := (y+h-1) div mTileSize; + x := x div mTileSize; + y := y div mTileSize; + // clip rect + if (x < 0) then x := 0 else if (x >= gw) then x := gw-1; + if (y < 0) then y := 0 else if (y >= gh) then y := gh-1; + if (ex < 0) then ex := 0 else if (ex >= gw) then ex := gw-1; + if (ey < 0) then ey := 0 else if (ey >= gh) then ey := gh-1; + if (x > ex) or (y > ey) then exit; // just in case + // do the work + for gy := y to ey do begin - if (gy < 0) then continue; - if (gy >= gh) then break; - for gx := x div tsize to (x+w-1) div tsize do + for gx := x to ex do begin - if (gx < 0) then continue; - if (gx >= gw) then break; result := cb(gy*gw+gx, bodyId); if result then exit; end; @@ -588,7 +1268,7 @@ end; // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.inserter (grida: Integer; bodyId: TBodyProxyId): Boolean; var - cidx: Integer; + ccidx: Integer; pc: Integer; pi: PGridCell; f: Integer; @@ -598,54 +1278,68 @@ begin pc := mGrid[grida]; if (pc <> -1) then begin - pi := @mCells[pc]; - f := 0; - for f := 0 to High(TGridCell.bodies) do + {$IF DEFINED(D2F_DEBUG)} + ccidx := pc; + while (ccidx <> -1) do begin - if (pi.bodies[f] = -1) then + pi := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do + begin + if (pi.bodies[f] = -1) then break; + if (pi.bodies[f] = bodyId) then raise Exception.Create('trying to insert already inserted proxy'); + end; + ccidx := pi.next; + end; + {$ENDIF} + ccidx := pc; + while (ccidx <> -1) do + begin + pi := @mCells[ccidx]; + // check "has room" flag + if (pi.bodies[GridCellBucketSize-1] = -1) then begin // can add here - pi.bodies[f] := bodyId; - if (f+1 < Length(TGridCell.bodies)) then pi.bodies[f+1] := -1; - exit; + for f := 0 to GridCellBucketSize-1 do + begin + if (pi.bodies[f] = -1) then + begin + pi.bodies[f] := bodyId; + if (f+1 < GridCellBucketSize) then pi.bodies[f+1] := -1; + exit; + end; + end; + raise Exception.Create('internal error in grid inserter'); end; + // no room, go to next cell in list (if there is any) + ccidx := pi.next; end; + // no room in cells, add new cell to list end; // either no room, or no cell at all - cidx := allocCell(); - mCells[cidx].bodies[0] := bodyId; - mCells[cidx].bodies[1] := -1; - mCells[cidx].next := pc; - mGrid[grida] := cidx; + ccidx := allocCell(); + pi := @mCells[ccidx]; + pi.bodies[0] := bodyId; + pi.bodies[1] := -1; + pi.next := pc; + mGrid[grida] := ccidx; end; -procedure TBodyGridBase.insertInternal (body: TBodyProxyId); -var - px: PBodyProxyRec; -begin - if (body < 0) or (body > High(mProxies)) then exit; // just in case - px := @mProxies[body]; - forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, inserter, body); -end; - -// absolutely not tested +// assume that we cannot have one object added to bucket twice function TBodyGridBase.remover (grida: Integer; bodyId: TBodyProxyId): Boolean; var - f: Integer; - pidx, idx, tmp: Integer; + f, c: Integer; + pidx, ccidx: Integer; pc: PGridCell; begin result := false; // never stop // find and remove cell - pidx := -1; - idx := mGrid[grida]; - while (idx >= 0) do - begin - tmp := mCells[idx].next; - pc := @mCells[idx]; - f := 0; - while (f < High(TGridCell.bodies)) do + pidx := -1; // previous cell index + ccidx := mGrid[grida]; // current cell index + while (ccidx <> -1) do + begin + pc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do begin if (pc.bodies[f] = bodyId) then begin @@ -653,137 +1347,260 @@ begin if (f = 0) and (pc.bodies[1] = -1) then begin // this cell contains no elements, remove it - tmp := mCells[idx].next; - if (pidx = -1) then mGrid[grida] := tmp else mCells[pidx].next := tmp; - freeCell(idx); - end - else + if (pidx = -1) then mGrid[grida] := pc.next else mCells[pidx].next := pc.next; + freeCell(ccidx); + exit; + end; + // remove element from bucket + for c := f to GridCellBucketSize-2 do begin - // remove element from bucket - Inc(f); - while (f < High(TGridCell.bodies)) do - begin - pc.bodies[f-1] := pc.bodies[f]; - if (pc.bodies[f] = -1) then break; - Inc(f); - end; - pc.bodies[High(TGridCell.bodies)] := -1; // just in case + pc.bodies[c] := pc.bodies[c+1]; + if (pc.bodies[c] = -1) then break; end; - exit; // assume that we cannot have one object added to bucket twice + pc.bodies[GridCellBucketSize-1] := -1; // "has free room" flag + exit; end; - Inc(f); end; - pidx := idx; - idx := tmp; + pidx := ccidx; + ccidx := pc.next; end; end; -// absolutely not tested -procedure TBodyGridBase.removeInternal (body: TBodyProxyId); -var - px: PBodyProxyRec; -begin - if (body < 0) or (body > High(mProxies)) then exit; // just in case - px := @mProxies[body]; - forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body); -end; - // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.insertBody (aObj: ITP; aX, aY, aWidth, aHeight: Integer; aTag: Integer=-1): TBodyProxyId; begin aTag := aTag and TagFullMask; result := allocProxy(aX, aY, aWidth, aHeight, aObj, aTag); - insertInternal(result); + //insertInternal(result); + forGridRect(aX, aY, aWidth, aHeight, inserter, result); end; procedure TBodyGridBase.removeBody (body: TBodyProxyId); +var + px: PBodyProxyRec; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case - removeInternal(body); + px := @mProxies[body]; + //removeInternal(body); + forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body); freeProxy(body); end; // ////////////////////////////////////////////////////////////////////////// // -procedure TBodyGridBase.moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer); +procedure TBodyGridBase.moveResizeBody (body: TBodyProxyId; nx, ny, nw, nh: Integer); var px: PBodyProxyRec; x0, y0, w, h: Integer; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case - if (dx = 0) and (dy = 0) and (sx = 0) and (sy = 0) then exit; px := @mProxies[body]; x0 := px.mX; y0 := px.mY; w := px.mWidth; h := px.mHeight; + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format('proxy #%d: MOVERESIZE: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d;nw=%d;nh=%d', [body, x0-mMinX, y0-mMinY, w, h, nx-mMinX, ny-mMinY, nw, nh]), MSG_NOTIFY); + {$ENDIF} + if (nx = x0) and (ny = y0) and (nw = w) and (nh = h) then exit; + // map -> grid + Dec(x0, mMinX); + Dec(y0, mMinY); + Dec(nx, mMinX); + Dec(ny, mMinY); // did any corner crossed tile boundary? - if (x0 div mTileSize <> (x0+dx) div mTileSize) or - (y0 div mTileSize <> (y0+dx) div mTileSize) or - ((x0+w) div mTileSize <> (x0+w+sx) div mTileSize) or - ((y0+h) div mTileSize <> (y0+h+sy) div mTileSize) then - begin - removeInternal(body); - Inc(px.mX, dx); - Inc(px.mY, dy); - Inc(px.mWidth, sx); - Inc(px.mHeight, sy); - insertInternal(body); + if (x0 div mTileSize <> nx div mTileSize) or + (y0 div mTileSize <> ny div mTileSize) or + ((x0+w-1) div mTileSize <> (nx+nw-1) div mTileSize) or + ((y0+h-1) div mTileSize <> (ny+nh-1) div mTileSize) then + begin + //writeln('moveResizeBody: cell occupation changed! old=(', x0, ',', y0, ')-(', x0+w-1, ',', y0+h-1, '); new=(', nx, ',', ny, ')-(', nx+nw-1, ',', ny+nh-1, ')'); + //removeInternal(body); + forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body); + px.mX := nx+mMinX; + px.mY := ny+mMinY; + px.mWidth := nw; + px.mHeight := nh; + //insertInternal(body); + forGridRect(px.mX, px.mY, nw, nh, inserter, body); end else begin - Inc(px.mX, dx); - Inc(px.mY, dy); - Inc(px.mWidth, sx); - Inc(px.mHeight, sy); + px.mX := nx+mMinX; + px.mY := ny+mMinY; + px.mWidth := nw; + px.mHeight := nh; end; end; -procedure TBodyGridBase.moveBody (body: TBodyProxyId; dx, dy: Integer); + +//TODO: optimize for horizontal/vertical moves +procedure TBodyGridBase.moveBody (body: TBodyProxyId; nx, ny: Integer); var px: PBodyProxyRec; - nx, ny: Integer; + x0, y0: Integer; + ogx0, ogx1, ogy0, ogy1: Integer; // old grid rect + ngx0, ngx1, ngy0, ngy1: Integer; // new grid rect + gx, gy: Integer; + gw, gh: Integer; + pw, ph: Integer; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case - if (dx = 0) and (dy = 0) then exit; // check if tile coords was changed px := @mProxies[body]; - nx := px.mX+dx; - ny := px.mY+dy; - if (nx div mTileSize <> px.mX div mTileSize) or (ny div mTileSize <> px.mY div mTileSize) then + x0 := px.mX; + y0 := px.mY; + if (nx = x0) and (ny = y0) then exit; + // map -> grid + Dec(x0, mMinX); + Dec(y0, mMinY); + Dec(nx, mMinX); + Dec(ny, mMinY); + // check for heavy work + pw := px.mWidth; + ph := px.mHeight; + ogx0 := x0 div mTileSize; + ogy0 := y0 div mTileSize; + ngx0 := nx div mTileSize; + ngy0 := ny div mTileSize; + ogx1 := (x0+pw-1) div mTileSize; + ogy1 := (y0+ph-1) div mTileSize; + ngx1 := (nx+pw-1) div mTileSize; + ngy1 := (ny+ph-1) div mTileSize; + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format('proxy #%d: checkmove: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d og:(%d,%d)-(%d,%d); ng:(%d,%d)-(%d,%d)', [body, x0, y0, pw, ph, nx, ny, ogx0, ogy0, ogx1, ogy1, ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY); + {$ENDIF} + if (ogx0 <> ngx0) or (ogy0 <> ngy0) or (ogx1 <> ngx1) or (ogy1 <> ngy1) then begin // crossed tile boundary, do heavy work - moveResizeBody(body, dx, dy, 0, 0); + gw := mWidth; + gh := mHeight; + // cycle with old rect, remove body where it is necessary + // optimized for horizontal moves + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format('proxy #%d: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d og:(%d,%d)-(%d,%d); ng:(%d,%d)-(%d,%d)', [body, x0, y0, pw, ph, nx, ny, ogx0, ogy0, ogx1, ogy1, ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY); + {$ENDIF} + // remove stale marks + if not ((ogy0 >= gh) or (ogy1 < 0)) and + not ((ogx0 >= gw) or (ogx1 < 0)) then + begin + if (ogx0 < 0) then ogx0 := 0; + if (ogy0 < 0) then ogy0 := 0; + if (ogx1 > gw-1) then ogx1 := gw-1; + if (ogy1 > gh-1) then ogy1 := gh-1; + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format(' norm og:(%d,%d)-(%d,%d)', [ogx0, ogy0, ogx1, ogy1]), MSG_NOTIFY); + {$ENDIF} + for gx := ogx0 to ogx1 do + begin + if (gx < ngx0) or (gx > ngx1) then + begin + // this column is completely outside of new rect + for gy := ogy0 to ogy1 do + begin + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format(' remove0:(%d,%d)', [gx, gy]), MSG_NOTIFY); + {$ENDIF} + remover(gy*gw+gx, body); + end; + end + else + begin + // heavy checks + for gy := ogy0 to ogy1 do + begin + if (gy < ngy0) or (gy > ngy1) then + begin + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format(' remove1:(%d,%d)', [gx, gy]), MSG_NOTIFY); + {$ENDIF} + remover(gy*gw+gx, body); + end; + end; + end; + end; + end; + // cycle with new rect, add body where it is necessary + if not ((ngy0 >= gh) or (ngy1 < 0)) and + not ((ngx0 >= gw) or (ngx1 < 0)) then + begin + if (ngx0 < 0) then ngx0 := 0; + if (ngy0 < 0) then ngy0 := 0; + if (ngx1 > gw-1) then ngx1 := gw-1; + if (ngy1 > gh-1) then ngy1 := gh-1; + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format(' norm ng:(%d,%d)-(%d,%d)', [ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY); + {$ENDIF} + for gx := ngx0 to ngx1 do + begin + if (gx < ogx0) or (gx > ogx1) then + begin + // this column is completely outside of old rect + for gy := ngy0 to ngy1 do + begin + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format(' insert0:(%d,%d)', [gx, gy]), MSG_NOTIFY); + {$ENDIF} + inserter(gy*gw+gx, body); + end; + end + else + begin + // heavy checks + for gy := ngy0 to ngy1 do + begin + if (gy < ogy0) or (gy > ogy1) then + begin + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format(' insert1:(%d,%d)', [gx, gy]), MSG_NOTIFY); + {$ENDIF} + inserter(gy*gw+gx, body); + end; + end; + end; + end; + end; + // done end else begin - // nothing to do with the grid, just fix coordinates - px.mX := nx; - px.mY := ny; + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format('proxy #%d: GRID OK: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d og:(%d,%d)-(%d,%d); ng:(%d,%d)-(%d,%d)', [body, x0, y0, pw, ph, nx, ny, ogx0, ogy0, ogx1, ogy1, ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY); + {$ENDIF} end; + // update coordinates + px.mX := nx+mMinX; + px.mY := ny+mMinY; end; -procedure TBodyGridBase.resizeBody (body: TBodyProxyId; sx, sy: Integer); + +procedure TBodyGridBase.resizeBody (body: TBodyProxyId; nw, nh: Integer); var px: PBodyProxyRec; - x0, y0: Integer; - nw, nh: Integer; + x0, y0, w, h: Integer; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case - if (sx = 0) and (sy = 0) then exit; // check if tile coords was changed px := @mProxies[body]; - x0 := px.mX; - y0 := px.mY; - nw := px.mWidth+sx; - nh := px.mHeight+sy; - if ((x0+px.mWidth) div mTileSize <> (x0+nw) div mTileSize) or - ((y0+px.mHeight) div mTileSize <> (y0+nh) div mTileSize) then + x0 := px.mX-mMinX; + y0 := px.mY-mMinY; + w := px.mWidth; + h := px.mHeight; + {$IF DEFINED(D2F_DEBUG_MOVER)} + e_WriteLog(Format('proxy #%d: RESIZE: xg=%d;yg=%d;w=%d;h=%d;nw=%d;nh=%d', [body, x0, y0, w, h, nw, nh]), MSG_NOTIFY); + {$ENDIF} + if ((x0+w-1) div mTileSize <> (x0+nw-1) div mTileSize) or + ((y0+h-1) div mTileSize <> (y0+nh-1) div mTileSize) then begin // crossed tile boundary, do heavy work - moveResizeBody(body, 0, 0, sx, sy); + //removeInternal(body); + forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body); + px.mWidth := nw; + px.mHeight := nh; + //insertInternal(body); + forGridRect(px.mX, px.mY, nw, nh, inserter, body); end else begin @@ -794,9 +1611,21 @@ begin end; +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.atCellInPoint (x, y: Integer): TAtPointEnumerator; +var + ccidx: Integer = -1; +begin + Dec(x, mMinX); + Dec(y, mMinY); + if (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize) then ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)]; + result := TAtPointEnumerator.Create(mCells, ccidx, getProxyById); +end; + + // ////////////////////////////////////////////////////////////////////////// // // no callback: return `true` on the first hit -function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; +function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP; var f: Integer; idx, curci: Integer; @@ -806,15 +1635,25 @@ var ptag: Integer; begin result := Default(ITP); + if (exittag <> nil) then exittag^ := 0; tagmask := tagmask and TagFullMask; if (tagmask = 0) then exit; + {$IF DEFINED(D2F_DEBUG_XXQ)} + if (assigned(cb)) then e_WriteLog(Format('0: grid pointquery: (%d,%d)', [x, y]), MSG_NOTIFY); + {$ENDIF} + // make coords (0,0)-based Dec(x, mMinX); Dec(y, mMinY); if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then exit; curci := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)]; + + {$IF DEFINED(D2F_DEBUG_XXQ)} + if (assigned(cb)) then e_WriteLog(Format('1: grid pointquery: (%d,%d) (%d,%d) %d', [x, y, (x div mTileSize), (y div mTileSize), curci]), MSG_NOTIFY); + {$ENDIF} + // restore coords Inc(x, mMinX); Inc(y, mMinY); @@ -829,70 +1668,531 @@ begin end; lq := mLastQuery; + {$IF DEFINED(D2F_DEBUG_XXQ)} + if (assigned(cb)) then e_WriteLog(Format('2: grid pointquery: (%d,%d); lq=%u', [x, y, lq]), MSG_NOTIFY); + {$ENDIF} + while (curci <> -1) do begin + {$IF DEFINED(D2F_DEBUG_XXQ)} + if (assigned(cb)) then e_WriteLog(Format(' cell #%d', [curci]), MSG_NOTIFY); + {$ENDIF} cc := @mCells[curci]; - for f := 0 to High(TGridCell.bodies) do + for f := 0 to GridCellBucketSize-1 do begin if (cc.bodies[f] = -1) then break; px := @mProxies[cc.bodies[f]]; - ptag := px.mTag; - if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + {$IF DEFINED(D2F_DEBUG_XXQ)} + if (assigned(cb)) then e_WriteLog(Format(' proxy #%d; qm:%u; tag:%08x; tagflag:%d %u', [cc.bodies[f], px.mQueryMark, px.mTag, (px.mTag and tagmask), LongWord(px.mObj)]), MSG_NOTIFY); + {$ENDIF} + // shit. has to do it this way, so i can change tag in callback + if (px.mQueryMark <> lq) then + begin + px.mQueryMark := lq; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and + (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then + begin + if assigned(cb) then + begin + if cb(px.mObj, ptag) then + begin + result := px.mObj; + if (exittag <> nil) then exittag^ := ptag; + exit; + end; + end + else + begin + result := px.mObj; + if (exittag <> nil) then exittag^ := ptag; + exit; + end; + end; + end; + end; + curci := cc.next; + end; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +// no callback: return `true` on the first hit +function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1; allowDisabled: Boolean=false): ITP; +var + idx: Integer; + gx, gy: Integer; + sx, sy, ex, ey: Integer; + curci: Integer; + f: Integer; + cc: PGridCell = nil; + px: PBodyProxyRec; + lq: LongWord; + gw, gh: Integer; + x0, y0: Integer; + ptag: Integer; +begin + result := Default(ITP); + if (w < 1) or (h < 1) then exit; + tagmask := tagmask and TagFullMask; + if (tagmask = 0) then exit; + + x0 := x; + y0 := y; + + // fix coords + Dec(x, mMinX); + Dec(y, mMinY); + + gw := mWidth; + gh := mHeight; + + if (x+w <= 0) or (y+h <= 0) then exit; + if (x >= gw*mTileSize) or (y >= gh*mTileSize) then exit; + + sx := x div mTileSize; + sy := y div mTileSize; + ex := (x+w-1) div mTileSize; + ey := (y+h-1) div mTileSize; + + // clip rect + if (sx < 0) then sx := 0 else if (sx >= gw) then sx := gw-1; + if (sy < 0) then sy := 0 else if (sy >= gh) then sy := gh-1; + if (ex < 0) then ex := 0 else if (ex >= gw) then ex := gw-1; + if (ey < 0) then ey := 0 else if (ey >= gh) then ey := gh-1; + if (sx > ex) or (sy > ey) then exit; // just in case + + // has something to do + if mInQuery then raise Exception.Create('recursive queries aren''t supported'); + mInQuery := true; + + // increase query counter + Inc(mLastQuery); + if (mLastQuery = 0) then + begin + // just in case of overflow + mLastQuery := 1; + for idx := 0 to High(mProxies) do mProxies[idx].mQueryMark := 0; + end; + //e_WriteLog(Format('grid: query #%d: (%d,%d)-(%dx%d)', [mLastQuery, minx, miny, maxx, maxy]), MSG_NOTIFY); + lq := mLastQuery; + + // go on + for gy := sy to ey do + begin + for gx := sx to ex do + begin + // process cells + curci := mGrid[gy*gw+gx]; + while (curci <> -1) do + begin + cc := @mCells[curci]; + for f := 0 to GridCellBucketSize-1 do + begin + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + // shit! has to do it this way, so i can change tag in callback + if (px.mQueryMark = lq) then continue; + px.mQueryMark := lq; + ptag := px.mTag; + if (not allowDisabled) and ((ptag and TagDisabled) <> 0) then continue; + if ((ptag and tagmask) = 0) then continue; + if (x0 >= px.mX+px.mWidth) or (y0 >= px.mY+px.mHeight) then continue; + if (x0+w <= px.mX) or (y0+h <= px.mY) then continue; + if assigned(cb) then + begin + if cb(px.mObj, ptag) then begin result := px.mObj; mInQuery := false; exit; end; + end + else + begin + result := px.mObj; + mInQuery := false; + exit; + end; + end; + curci := cc.next; + end; + end; + end; + + mInQuery := false; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.forEachAlongLine (ax0, ay0, ax1, ay1: Integer; cb: TGridQueryCB; tagmask: Integer=-1; log: Boolean=false): ITP; +var + lw: TLineWalker; + ccidx: Integer; + cc: PGridCell; + px: PBodyProxyRec; + lq: LongWord; + f, ptag: Integer; + gw, gh, minx, miny: Integer; + x0, y0: Integer; + x1, y1: Integer; + cx, cy: Integer; + //px0, py0, px1, py1: Integer; +begin + log := false; + result := Default(ITP); + tagmask := tagmask and TagFullMask; + if (tagmask = 0) or not assigned(cb) then exit; + + gw := mWidth; + gh := mHeight; + minx := mMinX; + miny := mMinY; + + // make query coords (0,0)-based + x0 := ax0-minx; + y0 := ay0-miny; + x1 := ax1-minx; + y1 := ay1-miny; + + lw := TLineWalker.Create(0, 0, gw*mTileSize-1, gh*mTileSize-1); + if not lw.setup(x0, y0, x1, y1) then exit; // out of screen + + if mInQuery then raise Exception.Create('recursive queries aren''t supported'); + mInQuery := true; + + // increase query counter + Inc(mLastQuery); + if (mLastQuery = 0) then + begin + // just in case of overflow + mLastQuery := 1; + for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0; + end; + lq := mLastQuery; + + repeat + lw.getXY(cx, cy); + // check tile + ccidx := mGrid[(cy div mTileSize)*gw+(cx div mTileSize)]; + // process cells + while (ccidx <> -1) do + begin + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do + begin + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + begin + px.mQueryMark := lq; // mark as processed + if cb(px.mObj, ptag) then + begin + result := px.mObj; + mInQuery := false; + exit; + end; + end; + end; + // next cell + ccidx := cc.next; + end; + // done processing cells, move to next tile + until lw.stepToNextTile(); + + mInQuery := false; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +// trace box with the given velocity; return object hit (if any) +// `cb` is used unconvetionally here: if it returns `false`, tracer will ignore the object +function TBodyGridBase.traceBox (out ex, ey: Integer; const ax0, ay0, aw, ah: Integer; const dx, dy: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; +var + gx, gy: Integer; + ccidx: Integer; + cc: PGridCell; + px: PBodyProxyRec; + lq: LongWord; + f, ptag: Integer; + minu0: Single = 100000.0; + u0: Single; + cx0, cy0, cx1, cy1: Integer; + hitpx: PBodyProxyRec = nil; +begin + result := Default(ITP); + ex := ax0+dx; + ey := ay0+dy; + if (aw < 1) or (ah < 1) then exit; + + cx0 := nmin(ax0, ax0+dx); + cy0 := nmin(ay0, ay0+dy); + cx1 := nmax(ax0+aw-1, ax0+aw-1+dx); + cy1 := nmax(ay0+ah-1, ay0+ah-1+dy); + + cx0 -= mMinX; cy0 -= mMinY; + cx1 -= mMinX; cy1 -= mMinY; + + if (cx1 < 0) or (cy1 < 0) or (cx0 >= mWidth*mTileSize) or (cy0 >= mHeight*mTileSize) then exit; + + if (cx0 < 0) then cx0 := 0; + if (cy0 < 0) then cy0 := 0; + if (cx1 >= mWidth*mTileSize) then cx1 := mWidth*mTileSize-1; + if (cy1 >= mHeight*mTileSize) then cy1 := mHeight*mTileSize-1; + // just in case + if (cx0 > cx1) or (cy0 > cy1) then exit; + + if mInQuery then raise Exception.Create('recursive queries aren''t supported'); + mInQuery := true; + + // increase query counter + Inc(mLastQuery); + if (mLastQuery = 0) then + begin + // just in case of overflow + mLastQuery := 1; + for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0; + end; + lq := mLastQuery; + + for gy := cy0 div mTileSize to cy1 div mTileSize do + begin + for gx := cx0 div mTileSize to cx1 div mTileSize do + begin + ccidx := mGrid[gy*mWidth+gx]; + while (ccidx <> -1) do + begin + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do + begin + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + begin + px.mQueryMark := lq; // mark as processed + if assigned(cb) then + begin + if not cb(px.mObj, ptag) then continue; + end; + if not sweepAABB(ax0, ay0, aw, ah, dx, dy, px.mX, px.mY, px.mWidth, px.mHeight, @u0) then continue; + if (minu0 > u0) then + begin + hitpx := px; + result := px.mObj; + minu0 := u0; + if (u0 = 0.0) then + begin + ex := ax0; + ey := ay0; + mInQuery := false; + exit; + end; + end; + end; + end; + // next cell + ccidx := cc.next; + end; + end; + end; + + if (minu0 <= 1.0) then + begin + ex := ax0+round(dx*minu0); + ey := ay0+round(dy*minu0); + // just in case, compensate for floating point inexactness + if (ex >= hitpx.mX) and (ey >= hitpx.mY) and (ex < hitpx.mX+hitpx.mWidth) and (ey < hitpx.mY+hitpx.mHeight) then + begin + ex := ax0+trunc(dx*minu0); + ey := ay0+trunc(dy*minu0); + end; + end; + + mInQuery := false; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +{.$DEFINE D2F_DEBUG_OTR} +function TBodyGridBase.traceOrthoRayWhileIn (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): Boolean; +var + ccidx: Integer; + cc: PGridCell; + px: PBodyProxyRec; + ptag: Integer; + minx, miny: Integer; + f, c0, c1: Integer; + x0, y0, x1, y1: Integer; + celly0, celly1: Integer; + dy: Integer; + filled: array[0..mTileSize-1] of Byte; + {$IF DEFINED(D2F_DEBUG_OTR)} + s: AnsiString = ''; + {$ENDIF} +begin + result := false; + ex := ax1; + ey := ay1; + if not ((ax0 = ax1) or (ay0 = ay1)) then raise Exception.Create('orthoray is not orthogonal'); + + tagmask := tagmask and TagFullMask; + if (tagmask = 0) then exit; + + if (forEachAtPoint(ax0, ay0, nil, tagmask) = nil) then exit; + + minx := mMinX; + miny := mMinY; + + // offset query coords to (0,0)-based + x0 := ax0-minx; + y0 := ay0-miny; + x1 := ax1-minx; + y1 := ay1-miny; + + if (x0 = x1) then + begin + if (x0 < 0) or (x0 >= mWidth*mTileSize) then exit; // oops + // vertical + if (y0 < y1) then + begin + // down + if (y1 < 0) or (y0 >= mHeight*mTileSize) then exit; + //if (ay0 < 0) then ay0 := 0; + if (y0 < 0) then exit; + if (y1 >= mHeight*mTileSize) then y1 := mHeight*mTileSize-1; + dy := 1; + end + else + begin + // up + if (y0 < 0) or (y1 >= mHeight*mTileSize) then exit; + //if (ay1 < 0) then ay1 := 0; + if (y1 < 0) then exit; + if (y0 >= mHeight*mTileSize) then y0 := mHeight*mTileSize-1; + dy := -1; + end; + // check tile + while true do + begin + ccidx := mGrid[(y0 div mTileSize)*mWidth+(x0 div mTileSize)]; + FillChar(filled, sizeof(filled), 0); + celly0 := y0 and (not (mTileSize-1)); + celly1 := celly0+mTileSize-1; + while (ccidx <> -1) do begin - if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do begin - px.mQueryMark := lq; - if assigned(cb) then - begin - if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; - end - else + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and + (ax0 >= px.x0) and (ax0 <= px.x1) then begin - result := px.mObj; - exit; + // bound c0 and c1 to cell + c0 := nclamp(px.y0-miny, celly0, celly1); + c1 := nclamp(px.y1-miny, celly0, celly1); + // fill the thing + {$IF DEFINED(D2F_DEBUG_OTR)} + e_LogWritefln('**px.y0=%s; px.y1=%s; c0=%s; c1=%s; celly0=%s; celly1=%s; [%s..%s]', [px.y0-miny, px.y1-miny, c0, c1, celly0, celly1, c0-celly0, (c0-celly0)+(c1-c0)]); + {$ENDIF} + //assert(c0 <= c1); + FillChar(filled[c0-celly0], c1-c0+1, 1); end; end; + // next cell + ccidx := cc.next; + end; + {$IF DEFINED(D2F_DEBUG_OTR)} + s := formatstrf(' x=%s; ay0=%s; ay1=%s; y0=%s; celly0=%s; celly1=%s; dy=%s; [', [ax0, ay0, ay1, y0, celly0, celly1, dy]); + for f := 0 to High(filled) do if (filled[f] <> 0) then s += '1' else s += '0'; + s += ']'; + e_LogWriteln(s); + {$ENDIF} + // now go till we hit cell boundary or empty space + if (dy < 0) then + begin + // up + while (y0 >= celly0) and (filled[y0-celly0] <> 0) do + begin + {$IF DEFINED(D2F_DEBUG_OTR)} + e_LogWritefln(' filled: cdy=%s; y0=%s; celly0=%s; ay0=%s; ay1=%s', [y0-celly0, y0, celly0, ay0, ay1]); + {$ENDIF} + Dec(y0); + Dec(ay0); + end; + {$IF DEFINED(D2F_DEBUG_OTR)} + e_LogWritefln(' span done: cdy=%s; y0=%s; celly0=%s; ay0=%s; ay1=%s', [y0-celly0, y0, celly0, ay0, ay1]); + {$ENDIF} + if (ay0 <= ay1) then begin ey := ay1; result := false; exit; end; + if (y0 >= celly0) then begin ey := ay0+1; {assert(forEachAtPoint(ex, ey, nil, tagmask) <> nil);} result := true; exit; end; + end + else + begin + // down + while (y0 <= celly1) and (filled[y0-celly0] <> 0) do begin Inc(y0); Inc(ay0); end; + if (ay0 >= ay1) then begin ey := ay1; result := false; exit; end; + if (y0 <= celly1) then begin ey := ay0-1; result := true; exit; end; end; end; - curci := cc.next; + end + else + begin + // horizontal + assert(false); end; end; // ////////////////////////////////////////////////////////////////////////// // -// no callback: return `true` on the first hit -function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1; allowDisabled: Boolean=false): ITP; -const - tsize = mTileSize; +function TBodyGridBase.traceRay (const x0, y0, x1, y1: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; var - idx: Integer; - gx, gy: Integer; - curci: Integer; - f: Integer; - cc: PGridCell = nil; + ex, ey: Integer; +begin + result := traceRay(ex, ey, x0, y0, x1, y1, cb, tagmask); +end; + + +// no callback: return `true` on the nearest hit +// you are not supposed to understand this +function TBodyGridBase.traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; +var + lw, sweepw: TLineWalker; + ccidx: Integer; + cc: PGridCell; px: PBodyProxyRec; lq: LongWord; - gw: Integer; + f, ptag: Integer; + gw, gh, minx, miny: Integer; x0, y0: Integer; - ptag: Integer; + x1, y1: Integer; + cx, cy: Integer; + px0, py0, px1, py1: Integer; + lastDistSq, distSq, hx, hy: Integer; + firstCell: Boolean = true; + wasHit: Boolean; begin result := Default(ITP); - if (w < 1) or (h < 1) then exit; tagmask := tagmask and TagFullMask; if (tagmask = 0) then exit; - x0 := x; - y0 := y; + gw := mWidth; + gh := mHeight; + minx := mMinX; + miny := mMinY; - // fix coords - Dec(x, mMinX); - Dec(y, mMinY); + // make query coords (0,0)-based + x0 := ax0-minx; + y0 := ay0-miny; + x1 := ax1-minx; + y1 := ay1-miny; - gw := mWidth; - //tsize := mTileSize; + lw := TLineWalker.Create(0, 0, gw*mTileSize-1, gh*mTileSize-1); + if not lw.setup(x0, y0, x1, y1) then exit; // out of screen - if (x+w <= 0) or (y+h <= 0) then exit; - if (x >= gw*tsize) or (y >= mHeight*tsize) then exit; + sweepw := TLineWalker.Create(0, 0, 1, 1); // doesn't matter, just shut ups the compiler + + lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1; + + if mInQuery then raise Exception.Create('recursive queries aren''t supported'); + mInQuery := true; // increase query counter Inc(mLastQuery); @@ -900,71 +2200,93 @@ begin begin // just in case of overflow mLastQuery := 1; - for idx := 0 to High(mProxies) do mProxies[idx].mQueryMark := 0; + for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0; end; - //e_WriteLog(Format('grid: query #%d: (%d,%d)-(%dx%d)', [mLastQuery, minx, miny, maxx, maxy]), MSG_NOTIFY); lq := mLastQuery; - // go on - for gy := y div tsize to (y+h-1) div tsize do - begin - if (gy < 0) then continue; - if (gy >= mHeight) then break; - for gx := x div tsize to (x+w-1) div tsize do + repeat + lw.getXY(cx, cy); + // check tile + ccidx := mGrid[(cy div mTileSize)*gw+(cx div mTileSize)]; + // process cells + wasHit := false; + while (ccidx <> -1) do begin - if (gx < 0) then continue; - if (gx >= gw) then break; - // process cells - curci := mGrid[gy*gw+gx]; - while (curci <> -1) do + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do begin - cc := @mCells[curci]; - for f := 0 to High(TGridCell.bodies) do + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then begin - if (cc.bodies[f] = -1) then break; - px := @mProxies[cc.bodies[f]]; - ptag := px.mTag; - if (not allowDisabled) and ((ptag and TagDisabled) <> 0) then continue; - if ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then - //if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then - //if ( ((ptag and TagDisabled) = 0) = ignoreDisabled) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + px.mQueryMark := lq; // mark as processed + if assigned(cb) then begin - if (x0 >= px.mX+px.mWidth) or (y0 >= px.mY+px.mHeight) then continue; - if (x0+w <= px.mX) or (y0+h <= px.mY) then continue; - px.mQueryMark := lq; - if assigned(cb) then - begin - if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; - end - else + if not cb(px.mObj, ptag) then continue; + end; + // get adjusted proxy coords + px0 := px.mX-minx; + py0 := px.mY-miny; + px1 := px0+px.mWidth-1; + py1 := py0+px.mHeight-1; + // inside? + if firstCell and (x0 >= px0) and (y0 >= py0) and (x0 <= px1) and (y0 <= py1) then + begin + // oops + ex := ax0; + ey := ay0; + result := px.mObj; + mInQuery := false; + exit; + end; + // do line-vs-aabb test + sweepw.setClip(px0, py0, px1, py1); + if sweepw.setup(x0, y0, x1, y1) then + begin + // hit detected + sweepw.getPrevXY(hx, hy); + distSq := distanceSq(x0, y0, hx, hy); + if (distSq < lastDistSq) then begin + lastDistSq := distSq; + ex := hx+minx; + ey := hy+miny; result := px.mObj; - exit; + // if this is not a first cell, get outta here + if not firstCell then begin mInQuery := false; exit; end; + wasHit := true; end; end; end; - curci := cc.next; end; + // next cell + ccidx := cc.next; end; - end; + // done processing cells; exit if we registered a hit + // next cells can't have better candidates, obviously + if wasHit then begin mInQuery := false; exit; end; + firstCell := false; + // move to next tile + until lw.stepToNextTile(); + + mInQuery := false; end; // ////////////////////////////////////////////////////////////////////////// // // no callback: return `true` on the nearest hit -function TBodyGridBase.traceRay (x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; +function TBodyGridBase.traceRayOld (const x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; var ex, ey: Integer; begin - result := traceRay(ex, ey, x0, y0, x1, y1, cb, tagmask); + result := traceRayOld(ex, ey, x0, y0, x1, y1, cb, tagmask); end; // no callback: return `true` on the nearest hit // you are not supposed to understand this -function TBodyGridBase.traceRay (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; -const - tsize = mTileSize; +function TBodyGridBase.traceRayOld (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; var wx0, wy0, wx1, wy1: Integer; // window coordinates stx, sty: Integer; // "steps" for x and y axes @@ -991,6 +2313,15 @@ var lq: LongWord; f, ptag, distSq: Integer; x0, y0, x1, y1: Integer; + //swapped: Boolean = false; // true: xd is yd, and vice versa + // horizontal walker + {$IFDEF GRID_USE_ORTHO_ACCEL} + wklen, wkstep: Integer; + //wksign: Integer; + hopt: Boolean; + {$ENDIF} + // skipper + xdist, ydist: Integer; begin result := Default(ITP); lastObj := Default(ITP); @@ -999,7 +2330,15 @@ begin ey := ay1; // why not? if (tagmask = 0) then exit; - if (ax0 = ax1) and (ay0 = ay1) then exit; // as the first point is ignored, just get outta here + if (ax0 = ax1) and (ay0 = ay1) then + begin + result := forEachAtPoint(ax0, ay0, nil, tagmask, @ptag); + if (result <> nil) then + begin + if assigned(cb) and not cb(result, ptag, ax0, ay0, ax0, ay0) then result := Default(ITP); + end; + exit; + end; lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1; @@ -1007,8 +2346,12 @@ begin gh := mHeight; minx := mMinX; miny := mMinY; - maxx := gw*tsize-1; - maxy := gh*tsize-1; + maxx := gw*mTileSize-1; + maxy := gh*mTileSize-1; + + {$IF DEFINED(D2F_DEBUG_RAYTRACE)} + if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format('TRACING: (%d,%d)-(%d,%d) [(%d,%d)-(%d,%d)]; maxdistsq=%d', [ax0, ay0, ax1, ay1, minx, miny, maxx, maxy, lastDistSq]), MSG_NOTIFY); + {$ENDIF} x0 := ax0; y0 := ay0; @@ -1070,6 +2413,7 @@ begin if (dsx < dsy) then begin + //swapped := true; xptr := @yd; yptr := @xd; swapInt(x0, y0); @@ -1104,7 +2448,8 @@ begin begin yd := wy0; e -= rem+dsx; - if (rem > 0) then begin Inc(xd); e += dy2; end; + //if (rem > 0) then begin Inc(xd); e += dy2; end; //BUGGY + if (xd < wx0) then begin xd += 1; e += dy2; end; //??? xfixed := true; end; end; @@ -1140,24 +2485,59 @@ begin dx2 -= dy2; // first move, to skip starting point - if (xd = term) then exit; + // DON'T DO THIS! loop will take care of that + if (xd = term) then + begin + //FIXME! + result := forEachAtPoint(ax0, ay0, nil, tagmask, @ptag); + if (result <> nil) then + begin + if assigned(cb) then + begin + if cb(result, ptag, ax0, ay0, ax0, ay0) then + begin + ex := ax0; + ey := ay0; + end + else + begin + result := nil; + end; + end + else + begin + ex := ax0; + ey := ay0; + end; + end; + exit; + end; + prevx := xptr^+minx; prevy := yptr^+miny; + (* // move coords if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2; xd += stx; // done? if (xd = term) then exit; + *) + + {$IF DEFINED(D2F_DEBUG)} + if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*mTileSize) and (yptr^ >= gh*mTileSize) then raise Exception.Create('raycaster internal error (0)'); + {$ENDIF} + // DON'T DO THIS! loop will take care of that + //lastGA := (yptr^ div tsize)*gw+(xptr^ div tsize); + //ccidx := mGrid[lastGA]; - if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ > mHeight*tsize) then raise Exception.Create('raycaster internal error (0)'); + {$IF DEFINED(D2F_DEBUG_RAYTRACE)} + //if assigned(dbgRayTraceTileHitCB) then e_WriteLog('1:TRACING!', MSG_NOTIFY); + {$ENDIF} //if (dbgShowTraceLog) then e_WriteLog(Format('raycast start: (%d,%d)-(%d,%d); xptr^=%d; yptr^=%d', [ax0, ay0, ax1, ay1, xptr^, yptr^]), MSG_NOTIFY); - // restore query coords - Inc(ax0, minx); - Inc(ay0, miny); - //Inc(ax1, minx); - //Inc(ay1, miny); + if mInQuery then raise Exception.Create('recursive queries aren''t supported'); + mInQuery := true; // increase query counter Inc(mLastQuery); @@ -1169,27 +2549,253 @@ begin end; lq := mLastQuery; + {$IFDEF GRID_USE_ORTHO_ACCEL} + // if this is strict horizontal/vertical trace, use optimized codepath + if (ax0 = ax1) or (ay0 = ay1) then + begin + // horizontal trace: walk the whole tiles, calculating mindist once for each proxy in cell + // stx < 0: going left, otherwise `stx` is > 0, and we're going right + // vertical trace: walk the whole tiles, calculating mindist once for each proxy in cell + // stx < 0: going up, otherwise `stx` is > 0, and we're going down + hopt := (ay0 = ay1); // horizontal? + if (stx < 0) then begin {wksign := -1;} wklen := -(term-xd); end else begin {wksign := 1;} wklen := term-xd; end; + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln('optimized htrace; wklen=%d', [wklen]); + {$ENDIF} + ga := (yptr^ div mTileSize)*gw+(xptr^ div mTileSize); + // one of those will never change + x := xptr^+minx; + y := yptr^+miny; + while (wklen > 0) do + begin + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' htrace; ga=%d; x=%d, y=%d; y=%d; y=%d', [ga, xptr^+minx, yptr^+miny, y, ay0]); + {$ENDIF} + // new tile? + if (ga <> lastGA) then + begin + lastGA := ga; + ccidx := mGrid[lastGA]; + // convert coords to map (to avoid ajdusting coords inside the loop) + if hopt then x := xptr^+minx else y := yptr^+miny; + while (ccidx <> -1) do + begin + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do + begin + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) and + // constant coord should be inside + ((hopt and (y >= px.y0) and (y <= px.y1)) or + ((not hopt) and (x >= px.x0) and (x <= px.x1))) then + begin + px.mQueryMark := lq; // mark as processed + // inside the proxy? + if (hopt and (x > px.x0) and (x < px.x1)) or + ((not hopt) and (y > px.y0) and (y < px.y1)) then + begin + // setup prev[xy] + if assigned(cb) then + begin + if cb(px.mObj, ptag, x, y, x, y) then + begin + result := px.mObj; + ex := x; + ey := y; + mInQuery := false; + exit; + end; + end + else + begin + distSq := distanceSq(ax0, ay0, x, y); + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' EMBEDDED hhit(%d): a=(%d,%d), h=(%d,%d), distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, distSq, lastDistSq]); + {$ENDIF} + if (distSq < lastDistSq) then + begin + ex := x; + ey := y; + result := px.mObj; + mInQuery := false; + exit; + end; + end; + continue; + end; + // remember this hitpoint if it is nearer than an old one + // setup prev[xy] + if hopt then + begin + // horizontal trace + prevy := y; + y := yptr^+miny; + if (stx < 0) then + begin + // going left + if (x < px.x1) then continue; // not on the right edge + x := px.x1; + prevx := x+1; + end + else + begin + // going right + if (x > px.x0) then continue; // not on the left edge + x := px.x0; + prevx := x-1; + end; + end + else + begin + // vertical trace + prevx := x; + x := xptr^+minx; + if (stx < 0) then + begin + // going up + if (y < px.y1) then continue; // not on the bottom edge + y := px.y1; + prevy := x+1; + end + else + begin + // going down + if (y > px.y0) then continue; // not on the top edge + y := px.y0; + prevy := y-1; + end; + end; + if assigned(cb) then + begin + if cb(px.mObj, ptag, x, y, prevx, prevy) then + begin + result := px.mObj; + ex := prevx; + ey := prevy; + mInQuery := false; + exit; + end; + end + else + begin + distSq := distanceSq(ax0, ay0, prevx, prevy); + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' hhit(%d): a=(%d,%d), h=(%d,%d), p=(%d,%d), distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, prevx, prevy, distSq, lastDistSq]); + {$ENDIF} + if (distSq < lastDistSq) then + begin + wasHit := true; + lastDistSq := distSq; + ex := prevx; + ey := prevy; + lastObj := px.mObj; + end; + end; + end; + end; + // next cell + ccidx := cc.next; + end; + if wasHit and not assigned(cb) then begin result := lastObj; mInQuery := false; exit; end; + if assigned(cb) and cb(nil, 0, x, y, x, y) then begin result := lastObj; mInQuery := false; exit; end; + end; + // skip to next tile + if hopt then + begin + if (stx > 0) then + begin + // to the right + wkstep := ((xptr^ or (mTileSize-1))+1)-xptr^; + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' right step: wklen=%d; wkstep=%d', [wklen, wkstep]); + {$ENDIF} + if (wkstep >= wklen) then break; + Inc(xptr^, wkstep); + Inc(ga); + end + else + begin + // to the left + wkstep := xptr^-((xptr^ and (not (mTileSize-1)))-1); + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' left step: wklen=%d; wkstep=%d', [wklen, wkstep]); + {$ENDIF} + if (wkstep >= wklen) then break; + Dec(xptr^, wkstep); + Dec(ga); + end; + end + else + begin + if (stx > 0) then + begin + // to the down + wkstep := ((yptr^ or (mTileSize-1))+1)-yptr^; + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' down step: wklen=%d; wkstep=%d', [wklen, wkstep]); + {$ENDIF} + if (wkstep >= wklen) then break; + Inc(yptr^, wkstep); + Inc(ga, mWidth); + end + else + begin + // to the up + wkstep := yptr^-((yptr^ and (not (mTileSize-1)))-1); + {$IF DEFINED(D2F_DEBUG)} + if dbgShowTraceLog then e_LogWritefln(' up step: wklen=%d; wkstep=%d', [wklen, wkstep]); + {$ENDIF} + if (wkstep >= wklen) then break; + Dec(yptr^, wkstep); + Dec(ga, mWidth); + end; + end; + Dec(wklen, wkstep); + end; + // we can travel less than one cell + if wasHit and not assigned(cb) then result := lastObj else begin ex := ax1; ey := ay1; end; + mInQuery := false; + exit; + end; + {$ENDIF} + + {$IF DEFINED(D2F_DEBUG_RAYTRACE)} + if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div mTileSize*mTileSize)+minx, (yptr^ div mTileSize*mTileSize)+miny); + {$ENDIF} + + //e_LogWritefln('*********************', []); ccidx := -1; - // draw it; can omit checks + // can omit checks while (xd <> term) do begin // check cell(s) - if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ > mHeight*tsize) then raise Exception.Create('raycaster internal error (0)'); + {$IF DEFINED(D2F_DEBUG)} + if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*mTileSize) and (yptr^ >= gh*mTileSize) then raise Exception.Create('raycaster internal error (0)'); + {$ENDIF} // new tile? - ga := (yptr^ div tsize)*gw+(xptr^ div tsize); + ga := (yptr^ div mTileSize)*gw+(xptr^ div mTileSize); + {$IF DEFINED(D2F_DEBUG_RAYTRACE)} + if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format(' xd=%d; term=%d; gx=%d; gy=%d; ga=%d; lastga=%d', [xd, term, xptr^, yptr^, ga, lastGA]), MSG_NOTIFY); + {$ENDIF} if (ga <> lastGA) then begin // yes + {$IF DEFINED(D2F_DEBUG)} + if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div mTileSize*mTileSize)+minx, (yptr^ div mTileSize*mTileSize)+miny); + {$ENDIF} if (ccidx <> -1) then begin // signal cell completion if assigned(cb) then begin - if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; exit; end; + if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; mInQuery := false; exit; end; end else if wasHit then begin result := lastObj; + mInQuery := false; exit; end; end; @@ -1209,7 +2815,7 @@ begin while (curci <> -1) do begin cc := @mCells[curci]; - for f := 0 to High(TGridCell.bodies) do + for f := 0 to GridCellBucketSize-1 do begin if (cc.bodies[f] = -1) then break; px := @mProxies[cc.bodies[f]]; @@ -1224,9 +2830,10 @@ begin begin if cb(px.mObj, ptag, x, y, prevx, prevy) then begin - result := lastObj; + result := px.mObj; ex := prevx; ey := prevy; + mInQuery := false; exit; end; end @@ -1234,6 +2841,9 @@ begin begin // remember this hitpoint if it is nearer than an old one distSq := distanceSq(ax0, ay0, prevx, prevy); + {$IF DEFINED(D2F_DEBUG_RAYTRACE)} + if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format(' hit(%d): a=(%d,%d), h=(%d,%d), p=(%d,%d); distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, prevx, prevy, distSq, lastDistSq]), MSG_NOTIFY); + {$ENDIF} if (distSq < lastDistSq) then begin wasHit := true; @@ -1261,15 +2871,33 @@ begin ccidx := -1; if assigned(cb) then begin - if cb(nil, 0, x, y, prevx, prevy) then begin result := lastObj; exit; end; + if cb(nil, 0, x, y, prevx, prevy) then begin result := lastObj; mInQuery := false; exit; end; end else if wasHit then begin result := lastObj; + mInQuery := false; exit; end; end; end; + if (ccidx = -1) then + begin + // move to cell edge, as we have nothing to trace here anymore + if (stx < 0) then xdist := xd and (not (mTileSize-1)) else xdist := xd or (mTileSize-1); + if (sty < 0) then ydist := yd and (not (mTileSize-1)) else ydist := yd or (mTileSize-1); + //e_LogWritefln('0: swapped=%d; xd=%d; yd=%d; stx=%d; sty=%d; e=%d; dx2=%d; dy2=%d; term=%d; xdist=%d; ydist=%d', [swapped, xd, yd, stx, sty, e, dx2, dy2, term, xdist, ydist]); + while (xd <> xdist) and (yd <> ydist) do + begin + // step + xd += stx; + if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2; + //e_LogWritefln(' xd=%d; yd=%d', [xd, yd]); + if (xd = term) then break; + end; + //e_LogWritefln('1: swapped=%d; xd=%d; yd=%d; stx=%d; sty=%d; e=%d; dx2=%d; dy2=%d; term=%d; xdist=%d; ydist=%d', [swapped, xd, yd, stx, sty, e, dx2, dy2, term, xdist, ydist]); + if (xd = term) then break; + end; //putPixel(xptr^, yptr^); // move coords prevx := xptr^+minx; @@ -1277,153 +2905,18 @@ begin if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2; xd += stx; end; -end; - - -// ////////////////////////////////////////////////////////////////////////// // -//FIXME! optimize this with real tile walking -function TBodyGridBase.forEachAlongLine (x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1): ITP; -const - tsize = mTileSize; -var - i: Integer; - dx, dy, d: Integer; - xerr, yerr: Integer; - incx, incy: Integer; - stepx, stepy: Integer; - x, y: Integer; - maxx, maxy: Integer; - gw, gh: Integer; - ccidx: Integer; - curci: Integer; - cc: PGridCell; - px: PBodyProxyRec; - lq: LongWord; - minx, miny: Integer; - ptag: Integer; - lastWasInGrid: Boolean; - tbcross: Boolean; - f: Integer; -begin - result := Default(ITP); - tagmask := tagmask and TagFullMask; - if (tagmask = 0) then exit; - - minx := mMinX; - miny := mMinY; - - dx := x1-x0; - dy := y1-y0; - - if (dx > 0) then incx := 1 else if (dx < 0) then incx := -1 else incx := 0; - if (dy > 0) then incy := 1 else if (dy < 0) then incy := -1 else incy := 0; - - dx := abs(dx); - dy := abs(dy); - - if (dx > dy) then d := dx else d := dy; - - // `x` and `y` will be in grid coords - x := x0-minx; - y := y0-miny; - - // increase query counter - Inc(mLastQuery); - if (mLastQuery = 0) then + // we can travel less than one cell + if wasHit and not assigned(cb) then begin - // just in case of overflow - mLastQuery := 1; - for i := 0 to High(mProxies) do mProxies[i].mQueryMark := 0; + result := lastObj; + end + else + begin + ex := ax1; // why not? + ey := ay1; // why not? end; - lq := mLastQuery; - - // cache various things - //tsize := mTileSize; - gw := mWidth; - gh := mHeight; - maxx := gw*tsize-1; - maxy := gh*tsize-1; - - // setup distance and flags - lastWasInGrid := (x >= 0) and (y >= 0) and (x <= maxx) and (y <= maxy); - - // setup starting tile ('cause we'll adjust tile vars only on tile edge crossing) - if lastWasInGrid then ccidx := mGrid[(y div tsize)*gw+(x div tsize)] else ccidx := -1; - - // it is slightly faster this way - xerr := -d; - yerr := -d; - - // now trace - for i := 1 to d do - begin - // do one step - xerr += dx; - yerr += dy; - // invariant: one of those always changed - if (xerr < 0) and (yerr < 0) then raise Exception.Create('internal bug in grid raycaster (0)'); - if (xerr >= 0) then begin xerr -= d; x += incx; stepx := incx; end else stepx := 0; - if (yerr >= 0) then begin yerr -= d; y += incy; stepy := incy; end else stepy := 0; - // invariant: we always doing a step - if ((stepx or stepy) = 0) then raise Exception.Create('internal bug in grid raycaster (1)'); - begin - // check for crossing tile/grid boundary - if (x >= 0) and (y >= 0) and (x <= maxx) and (y <= maxy) then - begin - // we're still in grid - lastWasInGrid := true; - // check for tile edge crossing - if (stepx < 0) and ((x mod tsize) = tsize-1) then tbcross := true - else if (stepx > 0) and ((x mod tsize) = 0) then tbcross := true - else if (stepy < 0) and ((y mod tsize) = tsize-1) then tbcross := true - else if (stepy > 0) and ((y mod tsize) = 0) then tbcross := true - else tbcross := false; - // crossed tile edge? - if tbcross then - begin - // setup new cell index - ccidx := mGrid[(y div tsize)*gw+(x div tsize)]; - end; - end - else - begin - // out of grid - if lastWasInGrid then exit; // oops, stepped out of the grid -- there is no way to return - end; - end; - // has something to process in the current cell? - if (ccidx <> -1) then - begin - // process cell - curci := ccidx; - // convert coords to map (to avoid ajdusting coords inside the loop) - Inc(x, minx); - Inc(y, miny); - // process cell list - while (curci <> -1) do - begin - cc := @mCells[curci]; - for f := 0 to High(TGridCell.bodies) do - begin - if (cc.bodies[f] = -1) then break; - px := @mProxies[cc.bodies[f]]; - ptag := px.mTag; - if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then - begin - px.mQueryMark := lq; // mark as processed - if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; - end; - end; - // next cell - curci := cc.next; - end; - ccidx := -1; // don't process this anymore - // convert coords to grid - Dec(x, minx); - Dec(y, miny); - end; - end; + mInQuery := false; end;