X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fgame%2Fg_grid.pas;h=2dfb0ce43d4ff6cb49dece8b05fe3737ca7221b5;hb=987c4a835a103345b59937e8e1be8524a6228712;hp=925fb80ca042470d6b78acb7cb623952ef2d77cb;hpb=b79ddd98d923ee15f4bfd1db5111e669fc19964a;p=d2df-sdl.git diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas index 925fb80..2dfb0ce 100644 --- a/src/game/g_grid.pas +++ b/src/game/g_grid.pas @@ -1,9 +1,8 @@ -(* Copyright (C) DooM 2D:Forever Developers +(* Copyright (C) Doom 2D: Forever Developers * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. + * the Free Software Foundation, version 3 of the License ONLY. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -15,29 +14,61 @@ *) // 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} +{.$DEFINE GRID_USE_ORTHO_ACCEL} +{$DEFINE LINEAABB2} unit g_grid; interface +uses + mempool; + +(* + * In order to make this usable for kind-of-recursive calls, + * we'll use "frame memory pool" to return results. That is, + * we will allocate a memory pool that will be cleared on + * frame start, and then used as a simple "no-free" allocator. + * Grid will put results into this pool, and will never bother + * to free it. Caller should call "release" on result, and + * the pool will throw away everything. + * No more callbacks, of course. + *) + +const + GridTileSize = 32; // must be power of two! + +type + PGridCellCoord = ^TGridCellCoord; + TGridCellCoord = record + x, y: Integer; + end; + + CellCoordIter = specialize PoolIter; + type TBodyProxyId = Integer; - generic TBodyGridBase = class(TObject) + generic TBodyGridBase = class{$IFDEF USE_MEMPOOL}(TPoolObject){$ENDIF} 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 PITP = ^ITP; + type TCellQueryCB = procedure (x, y: Integer) is nested; // top-left cell corner coords + + type Iter = specialize PoolIter; const TagDisabled = $40000000; const TagFullMask = $3fffffff; private const - GridDefaultTileSize = 32; // must be power of two! GridCellBucketSize = 8; // WARNING! can't be less than 2! - private + public type PBodyProxyRec = ^TBodyProxyRec; TBodyProxyRec = record @@ -50,25 +81,69 @@ 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; @@ -79,6 +154,9 @@ type public dbgShowTraceLog: Boolean; + {$IF DEFINED(D2F_DEBUG)} + dbgRayTraceTileHitCB: TCellQueryCB; + {$ENDIF} private function allocCell (): Integer; @@ -87,9 +165,6 @@ 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 +176,8 @@ 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; @@ -116,31 +193,44 @@ type // `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; + + // return number of ITP thingys put into frame pool + // if `firstHit` is `true`, return on first hit (obviously) + function forEachInAABB (x, y, w, h: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter; + + // return number of ITP thingys put into frame pool + // if `firstHit` is `true`, return on first hit (obviously) + function forEachAtPoint (x, y: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter; - //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 forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1; allowDisabled: Boolean=false): 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) - // no callback: return `true` on the first hit - function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; + // return object of the nearest hit or nil + function traceRay (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; overload; + function traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; 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; + // 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) + 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; log: Boolean=false): ITP; + // trace line along the grid, put all objects from passed cells into frame pool, in no particular order + // return number of ITP thingys put into frame pool + function forEachAlongLine (ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1; log: Boolean=false): Iter; + // 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; tagmask: Integer=-1): ITP; + + // debug + function forEachBodyCell (body: TBodyProxyId): CellCoordIter; // this puts `TGridCellCoord` into frame pool for each cell + function forEachInCell (x, y: Integer): Iter; // this puts `ITP` into frame pool procedure dumpStats (); + public //WARNING! no sanity checks! property proxyEnabled[pid: TBodyProxyId]: Boolean read getProxyEnabled write setProxyEnabled; @@ -148,196 +238,309 @@ 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; -// you are not supposed to understand this -// returns `true` if there is an intersection, and enter coords -// enter coords will be equal to (x0, y0) if starting point is inside the box -// 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; +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 + stleft: Integer; // "steps left" + err, errinc, errmax: Integer; + xd, yd: Integer; // current coord + horiz: Boolean; + + 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; + + procedure getXY (out ox, oy: Integer); inline; + + public + // current coords + property x: Integer read xd; + property y: Integer read yd; + end; -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; +//function minInt (a, b: Integer): Integer; inline; +//function maxInt (a, b: Integer): Integer; inline; implementation uses - SysUtils, e_log; + SysUtils, e_log, g_console, geom, utils; // ////////////////////////////////////////////////////////////////////////// // procedure swapInt (var a: Integer; var b: Integer); inline; var t: Integer; begin t := a; a := b; b := t; 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; +//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; // ////////////////////////////////////////////////////////////////////////// // -// you are not supposed to understand this -// returns `true` if there is an intersection, and enter coords -// enter coords will be equal to (x0, y0) if starting point is inside the box -// 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; -var - wx0, wy0, wx1, wy1: Integer; // window coordinates - stx, sty: Integer; // "steps" for x and y axes - dsx, dsy: Integer; // "lengthes" 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) - rem: Integer; - //!term: Integer; - d0, d1: PInteger; - xfixed: Boolean; - temp: Integer; +constructor TLineWalker.Create (minx, miny, maxx, maxy: Integer); begin - result := false; - // why not - inx := x0; - iny := y0; - if (bw < 1) or (bh < 1) then exit; // impossible box - - if (x0 = x1) and (y0 = y1) then - begin - // check this point - result := (x0 >= bx) and (y0 >= by) and (x0 < bx+bw) and (y0 < by+bh); - exit; - end; - - // check if staring point is inside the box - if (x0 >= bx) and (y0 >= by) and (x0 < bx+bw) and (y0 < by+bh) then begin result := true; exit; end; + setClip(minx, miny, maxx, maxy); +end; +procedure TLineWalker.setClip (minx, miny, maxx, maxy: Integer); inline; +begin // clip rectange - wx0 := bx; - wy0 := by; - wx1 := bx+bw-1; - wy1 := by+bh-1; + wx0 := minx; + wy0 := miny; + wx1 := maxx; + wy1 := maxy; +end; + +function TLineWalker.setup (x0, y0, x1, y1: Integer): Boolean; +var + sx0, sy0, sx1, sy1: Single; +begin + if (wx1 < wx0) or (wy1 < wy0) then begin stleft := 0; xd := x0; yd := y0; result := false; exit; end; - // horizontal setup - if (x0 < x1) then + if (x0 >= wx0) and (y0 >= wy0) and (x0 <= wx1) and (y0 <= wy1) and + (x1 >= wx0) and (y1 >= wy0) and (x1 <= wx1) and (y1 <= wy1) then begin - // from left to right - if (x0 > wx1) or (x1 < wx0) then exit; // out of screen - stx := 1; // going right + result := true; 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); + sx0 := x0; sy0 := y0; + sx1 := x1; sy1 := y1; + result := clipLine(sx0, sy0, sx1, sy1, wx0, wy0, wx1, wy1); + if not result then begin stleft := 0; xd := x0; yd := y0; exit; end; + x0 := trunc(sx0); y0 := trunc(sy0); + x1 := trunc(sx1); y1 := trunc(sy1); end; - // vertical setup - if (y0 < y1) then + // check for ortho lines + if (y0 = y1) then + begin + // horizontal + horiz := true; + stleft := abs(x1-x0)+1; + if (x0 < x1) then stx := 1 else stx := -1; + sty := 0; + errinc := 0; + errmax := 10; // anything that is greater than zero + end + else if (x0 = x1) then begin - // from top to bottom - if (y0 > wy1) or (y1 < wy0) then exit; // out of screen - sty := 1; // going down + // vertical + horiz := false; + stleft := abs(y1-y0)+1; + stx := 0; + if (y0 < y1) then sty := 1 else sty := -1; + errinc := 0; + errmax := 10; // anything that is greater than zero 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); + // diagonal + if (abs(x1-x0) >= abs(y1-y0)) then + begin + // horizontal + horiz := true; + stleft := abs(x1-x0)+1; + errinc := abs(y1-y0)+1; + end + else + begin + // vertical + horiz := false; + stleft := abs(y1-y0)+1; + errinc := abs(x1-x0)+1; + end; + if (x0 < x1) then stx := 1 else stx := -1; + if (y0 < y1) then sty := 1 else sty := -1; + errmax := stleft; end; + xd := x0; + yd := y0; + err := -errmax; +end; - dsx := x1-x0; - dsy := y1-y0; +function TLineWalker.done (): Boolean; inline; begin result := (stleft <= 0); end; - if (dsx < dsy) then +// true: done +function TLineWalker.step (): Boolean; inline; +begin + if horiz then begin - d0 := @yd; - d1 := @xd; - swapInt(x0, y0); - swapInt(x1, y1); - swapInt(dsx, dsy); - swapInt(wx0, wy0); - swapInt(wx1, wy1); - swapInt(stx, sty); + xd += stx; + err += errinc; + if (err >= 0) then begin err -= errmax; yd += sty; end; end else begin - d0 := @xd; - d1 := @yd; + yd += sty; + err += errinc; + if (err >= 0) then begin err -= errmax; xd += stx; end; end; + Dec(stleft); + result := (stleft <= 0); +end; - dx2 := 2*dsx; - dy2 := 2*dsy; - xd := x0; - yd := y0; - e := 2*dsy-dsx; - //!term := x1; +// true: done +function TLineWalker.stepToNextTile (): Boolean; inline; +var + ex, ey: Integer; + xwalk, ywalk, wklen: Integer; // to the respective edges + f: Integer; +begin + result := false; + + if (stleft < 2) then begin result := true; exit; end; // max one pixel left, nothing to do - xfixed := false; - if (y0 < wy0) then + // strictly horizontal? + if (sty = 0) 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 + // only xd + if (stx < 0) then + begin + // xd: to left edge + ex := (xd and (not (TileSize-1)))-1; + stleft -= xd-ex; + end + else begin - yd := wy0; - e -= rem+dsx; - if (rem > 0) then begin Inc(xd); e += dy2; end; - xfixed := true; + // xd: to right edge + ex := (xd or (TileSize-1))+1; + stleft -= ex-xd; end; + result := (stleft <= 0); + xd := ex; + exit; end; - if (not xfixed) and (x0 < wx0) then + // strictly vertical? + if (stx = 0) 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; + // only xd + if (sty < 0) then + begin + // yd: to top edge + ey := (yd and (not (TileSize-1)))-1; + stleft -= yd-ey; + end + else + begin + // yd: to bottom edge + ey := (yd or (TileSize-1))+1; + stleft -= ey-yd; + end; + result := (stleft <= 0); + yd := ey; + exit; end; - (* - if (y1 > wy1) then + // diagonal + + // calculate xwalk + if (stx < 0) then + begin + ex := (xd and (not (TileSize-1)))-1; + xwalk := xd-ex; + end + else begin - // clip at bottom - temp := dx2*(wy1-y0)+dsx; - term := x0+temp div dy2; - rem := temp mod dy2; - if (rem = 0) then Dec(term); + ex := (xd or (TileSize-1))+1; + xwalk := ex-xd; end; - if (term > wx1) then term := wx1; // clip at right - - Inc(term); // draw last point - //if (term = xd) then exit; // this is the only point, get out of here - *) + // calculate ywalk + if (sty < 0) then + begin + ey := (yd and (not (TileSize-1)))-1; + ywalk := yd-ey; + end + else + begin + ey := (yd or (TileSize-1))+1; + ywalk := ey-yd; + end; - if (sty = -1) then yd := -yd; - if (stx = -1) then begin xd := -xd; {!term := -term;} end; - //!dx2 -= dy2; + { + while (xd <> ex) and (yd <> ey) do + begin + if horiz then + begin + xd += stx; + err += errinc; + if (err >= 0) then begin err -= errmax; yd += sty; end; + end + else + begin + yd += sty; + err += errinc; + if (err >= 0) then begin err -= errmax; xd += stx; end; + end; + Dec(stleft); + if (stleft < 1) then begin result := true; exit; end; + end; + } - inx := d0^; - iny := d1^; - result := true; + if (xwalk <= ywalk) then wklen := xwalk else wklen := ywalk; + while true do + begin + // in which dir we want to walk? + stleft -= wklen; + if (stleft <= 0) then begin result := true; exit; end; + if horiz then + begin + xd += wklen*stx; + for f := 1 to wklen do + begin + err += errinc; + if (err >= 0) then begin err -= errmax; yd += sty; end; + end; + end + else + begin + yd += wklen*sty; + for f := 1 to wklen do + begin + err += errinc; + if (err >= 0) then begin err -= errmax; xd += stx; end; + end; + end; + // check for walk completion + if (xd = ex) or (yd = ey) then exit; + wklen := 1; + end; end; +procedure TLineWalker.getXY (out ox, oy: Integer); inline; begin ox := xd; oy := yd; end; + // ////////////////////////////////////////////////////////////////////////// // procedure TBodyGridBase.TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer); @@ -353,12 +556,80 @@ begin 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 @@ -378,6 +649,7 @@ 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 @@ -391,7 +663,7 @@ begin mProxyFree := 0; mProxyCount := 0; mProxyMaxCount := 0; - e_WriteLog(Format('created grid with size: %dx%d (tile size: %d); pix: %dx%d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize]), MSG_NOTIFY); + e_WriteLog(Format('created grid with size: %dx%d (tile size: %d); pix: %dx%d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize]), TMsgType.Notify); end; @@ -407,21 +679,83 @@ 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; - e_WriteLog(Format('grid size: %dx%d (tile size: %d); pix: %dx%d; used cells: %d; max bodies in cell: %d; max proxies allocated: %d; proxies used: %d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize, mUsedCells, mcb, mProxyMaxCount, mProxyCount]), MSG_NOTIFY); + e_WriteLog(Format('grid size: %dx%d (tile size: %d); pix: %dx%d; used cells: %d; max bodies in cell: %d; max proxies allocated: %d; proxies used: %d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize, mUsedCells, mcb, mProxyMaxCount, mProxyCount]), TMsgType.Notify); +end; + + +function TBodyGridBase.forEachBodyCell (body: TBodyProxyId): CellCoordIter; +var + g, f, ccidx: Integer; + cc: PGridCell; + presobj: PGridCellCoord; +begin + result := CellCoordIter.Create(framePool); + if (body < 0) or (body > High(mProxies)) then begin result.finishIt(); exit; end; + 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 + begin + presobj := PGridCellCoord(framePool.alloc(sizeof(TGridCellCoord))); + presobj^.x := (g mod mWidth)*mTileSize+mMinX; + presobj^.y := (g div mWidth)*mTileSize+mMinY; + //cb((g mod mWidth)*mTileSize+mMinX, (g div mWidth)*mTileSize+mMinY); + end; + end; + // next cell + ccidx := cc.next; + end; + end; + result.finishIt(); +end; + + +function TBodyGridBase.forEachInCell (x, y: Integer): Iter; +var + f, ccidx: Integer; + cc: PGridCell; + presobj: PITP; +begin + result := Iter.Create(framePool); + Dec(x, mMinX); + Dec(y, mMinY); + if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y > mHeight*mTileSize) then begin result.finishIt(); exit; end; + 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; + presobj := PITP(framePool.alloc(sizeof(ITP))); + //presobj^ := mProxies[cc.bodies[f]].mObj; + Move(mProxies[cc.bodies[f]].mObj, presobj^, sizeof(ITP)); + end; + // next cell + ccidx := cc.next; + end; + result.finishIt(); end; @@ -455,16 +789,51 @@ 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 @@ -478,10 +847,17 @@ 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 @@ -491,14 +867,15 @@ 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; @@ -508,9 +885,12 @@ 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; @@ -558,11 +938,10 @@ 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; @@ -573,16 +952,22 @@ 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; @@ -593,7 +978,7 @@ end; // ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.inserter (grida: Integer; bodyId: TBodyProxyId): Boolean; var - cidx: Integer; + ccidx: Integer; pc: Integer; pi: PGridCell; f: Integer; @@ -603,54 +988,68 @@ 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 + 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 - if (pi.bodies[f] = -1) then + 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; -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); + ccidx := allocCell(); + pi := @mCells[ccidx]; + pi.bodies[0] := bodyId; + pi.bodies[1] := -1; + pi.next := pc; + mGrid[grida] := ccidx; 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 + pidx := -1; // previous cell index + ccidx := mGrid[grida]; // current cell index + while (ccidx <> -1) do begin - tmp := mCells[idx].next; - pc := @mCells[idx]; - f := 0; - while (f < High(TGridCell.bodies)) do + pc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do begin if (pc.bodies[f] = bodyId) then begin @@ -658,55 +1057,44 @@ 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; @@ -723,33 +1111,51 @@ begin 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 <> nx div mTileSize) or (y0 div mTileSize <> ny div mTileSize) or - ((x0+w) div mTileSize <> (nx+nw) div mTileSize) or - ((y0+h) div mTileSize <> (ny+nh) div mTileSize) then + ((x0+w-1) div mTileSize <> (nx+nw-1) div mTileSize) or + ((y0+h-1) div mTileSize <> (ny+nh-1) div mTileSize) then begin - removeInternal(body); - px.mX := nx; - px.mY := ny; + //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); + //insertInternal(body); + forGridRect(px.mX, px.mY, nw, nh, inserter, body); end else begin - px.mX := nx; - px.mY := ny; + px.mX := nx+mMinX; + px.mY := ny+mMinY; px.mWidth := nw; px.mHeight := nh; end; end; + +//TODO: optimize for horizontal/vertical moves procedure TBodyGridBase.moveBody (body: TBodyProxyId; nx, ny: Integer); var px: PBodyProxyRec; 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 // check if tile coords was changed @@ -757,22 +1163,129 @@ begin x0 := px.mX; y0 := px.mY; if (nx = x0) and (ny = y0) then exit; - if (nx div mTileSize <> x0 div mTileSize) or (ny div mTileSize <> y0 div mTileSize) then + // 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); + {$ENDIF} + if (ogx0 <> ngx0) or (ogy0 <> ngy0) or (ogx1 <> ngx1) or (ogy1 <> ngy1) then begin // crossed tile boundary, do heavy work - removeInternal(body); - px.mX := nx; - px.mY := ny; - insertInternal(body); + gw := mWidth; + gh := mHeight; + // cycle with old rect, remove body where it is necessary + // optimized for horizontal moves + {$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); + {$ENDIF} end; + // update coordinates + px.mX := nx+mMinX; + px.mY := ny+mMinY; end; + procedure TBodyGridBase.resizeBody (body: TBodyProxyId; nw, nh: Integer); var px: PBodyProxyRec; @@ -781,18 +1294,23 @@ begin if (body < 0) or (body > High(mProxies)) then exit; // just in case // check if tile coords was changed px := @mProxies[body]; - x0 := px.mX; - y0 := px.mY; + x0 := px.mX-mMinX; + y0 := px.mY-mMinY; w := px.mWidth; h := px.mHeight; - if ((x0+w) div mTileSize <> (x0+nw) div mTileSize) or - ((y0+h) div mTileSize <> (y0+nh) div mTileSize) then + {$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); + {$ENDIF} + if ((x0+w-1) div mTileSize <> (x0+nw-1) div mTileSize) or + ((y0+h-1) div mTileSize <> (y0+nh-1) div mTileSize) then begin // crossed tile boundary, do heavy work - removeInternal(body); + //removeInternal(body); + forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body); px.mWidth := nw; px.mHeight := nh; - insertInternal(body); + //insertInternal(body); + forGridRect(px.mX, px.mY, nw, nh, inserter, body); end else begin @@ -803,9 +1321,21 @@ begin end; +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.atCellInPoint (x, y: Integer): TAtPointEnumerator; +var + ccidx: Integer = -1; +begin + Dec(x, mMinX); + Dec(y, mMinY); + if (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize) then ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)]; + result := TAtPointEnumerator.Create(mCells, ccidx, getProxyById); +end; + + // ////////////////////////////////////////////////////////////////////////// // // no callback: return `true` on the first hit -function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; +function TBodyGridBase.forEachAtPoint (x, y: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter; var f: Integer; idx, curci: Integer; @@ -813,17 +1343,27 @@ var px: PBodyProxyRec; lq: LongWord; ptag: Integer; + presobj: PITP; begin - result := Default(ITP); + result := Iter.Create(framePool); tagmask := tagmask and TagFullMask; - if (tagmask = 0) then exit; + if (tagmask = 0) then begin result.finishIt(); exit; end; + + {$IF DEFINED(D2F_DEBUG_XXQ)} + if (assigned(cb)) then e_WriteLog(Format('0: grid pointquery: (%d,%d)', [x, y]), MSG_NOTIFY); + {$ENDIF} // make coords (0,0)-based Dec(x, mMinX); Dec(y, mMinY); - if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then exit; + if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then begin result.finishIt(); exit; end; curci := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)]; + + {$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); + {$ENDIF} + // restore coords Inc(x, mMinX); Inc(y, mMinY); @@ -838,57 +1378,70 @@ begin end; lq := mLastQuery; + {$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); + {$ENDIF} cc := @mCells[curci]; - for f := 0 to High(TGridCell.bodies) do + for f := 0 to GridCellBucketSize-1 do begin if (cc.bodies[f] = -1) then break; px := @mProxies[cc.bodies[f]]; + {$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} + if (px.mQueryMark = lq) then continue; + px.mQueryMark := lq; ptag := px.mTag; - if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + if (not allowDisabled) and ((ptag and TagDisabled) <> 0) then continue; + if ((ptag and tagmask) = 0) then continue; + if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then begin - if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then - begin - px.mQueryMark := lq; - if assigned(cb) then - begin - if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; - end - else - begin - result := px.mObj; - exit; - end; - end; + presobj := PITP(framePool.alloc(sizeof(ITP))); + Move(px.mObj, presobj^, sizeof(ITP)); + if (firstHit) then begin result.finishIt(); exit; end; end; end; curci := cc.next; end; + result.finishIt(); 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; +// return number of ITP thingys put into frame pool +function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter; var idx: Integer; gx, gy: Integer; + sx, sy, ex, ey: Integer; curci: Integer; f: Integer; cc: PGridCell = nil; px: PBodyProxyRec; lq: LongWord; - gw: Integer; + gw, gh: Integer; x0, y0: Integer; ptag: Integer; + presobj: PITP; begin - result := Default(ITP); - if (w < 1) or (h < 1) then exit; + if (w = 1) and (h = 1) then + begin + result := forEachAtPoint(x, y, tagmask, allowDisabled, firstHit); + exit; + end; + + result := Iter.Create(framePool); + if (w < 1) or (h < 1) then begin result.finishIt(); exit; end; + tagmask := tagmask and TagFullMask; - if (tagmask = 0) then exit; + if (tagmask = 0) then begin result.finishIt(); exit; end; x0 := x; y0 := y; @@ -898,10 +1451,24 @@ begin Dec(y, mMinY); gw := mWidth; - //tsize := mTileSize; + gh := mHeight; - if (x+w <= 0) or (y+h <= 0) then exit; - if (x >= gw*tsize) or (y >= mHeight*tsize) then exit; + if (x+w <= 0) or (y+h <= 0) then begin result.finishIt(); exit; end; + if (x >= gw*mTileSize) or (y >= gh*mTileSize) then begin result.finishIt(); exit; end; + + 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 begin result.finishIt(); exit; end; // just in case + + // has something to do // increase query counter Inc(mLastQuery); @@ -915,260 +1482,149 @@ begin lq := mLastQuery; // go on - for gy := y div tsize to (y+h-1) div tsize do + for gy := sy to ey do begin - if (gy < 0) then continue; - if (gy >= mHeight) then break; - for gx := x div tsize to (x+w-1) div tsize do + for gx := sx to ex do begin - if (gx < 0) then continue; - if (gx >= gw) then break; // process cells curci := mGrid[gy*gw+gx]; 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]]; + // 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) 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 - 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 - begin - result := px.mObj; - exit; - end; - end; + 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; + presobj := PITP(framePool.alloc(sizeof(ITP))); + Move(px.mObj, presobj^, sizeof(ITP)); + if (firstHit) then begin result.finishIt(); exit; end; end; curci := cc.next; end; end; end; + result.finishIt(); end; // ////////////////////////////////////////////////////////////////////////// // -// no callback: return `true` on the nearest hit -function TBodyGridBase.traceRay (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); -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.forEachAlongLine (ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1; log: Boolean=false): Iter; var - wx0, wy0, wx1, wy1: Integer; // window coordinates - stx, sty: Integer; // "steps" for x and y axes - dsx, dsy: Integer; // "lengthes" 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) - rem: Integer; - term: Integer; - xptr, yptr: PInteger; - xfixed: Boolean; - temp: Integer; - prevx, prevy: Integer; - lastDistSq: Integer; - ccidx, curci: Integer; - hasUntried: Boolean; - lastGA: Integer = -1; - ga, x, y: Integer; - lastObj: ITP; - wasHit: Boolean = false; - gw, gh, minx, miny, maxx, maxy: Integer; + lw: TLineWalker; + ccidx: Integer; cc: PGridCell; px: PBodyProxyRec; lq: LongWord; - f, ptag, distSq: Integer; - x0, y0, x1, y1: Integer; + f, ptag: Integer; + gw, gh, minx, miny: Integer; + x0, y0: Integer; + x1, y1: Integer; + cx, cy: Integer; + //px0, py0, px1, py1: Integer; + presobj: PITP; begin - result := Default(ITP); - lastObj := Default(ITP); + log := false; + result := Iter.Create(framePool); tagmask := tagmask and TagFullMask; - ex := ax1; // why not? - 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 - - lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1; + if (tagmask = 0) then begin result.finishIt(); exit; end; gw := mWidth; gh := mHeight; minx := mMinX; miny := mMinY; - maxx := gw*tsize-1; - maxy := gh*tsize-1; - x0 := ax0; - y0 := ay0; - x1 := ax1; - y1 := ay1; - - // offset query coords to (0,0)-based - Dec(x0, minx); - Dec(y0, miny); - Dec(x1, minx); - Dec(y1, miny); - - // clip rectange - wx0 := 0; - wy0 := 0; - wx1 := maxx; - wy1 := maxy; + // make query coords (0,0)-based + x0 := ax0-minx; + y0 := ay0-miny; + x1 := ax1-minx; + y1 := ay1-miny; - // 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; + lw := TLineWalker.Create(0, 0, gw*mTileSize-1, gh*mTileSize-1); + if not lw.setup(x0, y0, x1, y1) then begin result.finishIt(); exit; end; // out of screen - // 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 - xptr := @yd; - yptr := @xd; - swapInt(x0, y0); - swapInt(x1, y1); - swapInt(dsx, dsy); - swapInt(wx0, wy0); - swapInt(wx1, wy1); - swapInt(stx, sty); - end - else + // increase query counter + Inc(mLastQuery); + if (mLastQuery = 0) then begin - xptr := @xd; - yptr := @yd; + // just in case of overflow + mLastQuery := 1; + for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0; end; + lq := mLastQuery; - 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 + repeat + lw.getXY(cx, cy); + // check tile + ccidx := mGrid[(cy div mTileSize)*gw+(cx div mTileSize)]; + // process cells + while (ccidx <> -1) do begin - yd := wy0; - e -= rem+dsx; - if (rem > 0) then begin Inc(xd); e += dy2; end; - xfixed := true; + 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 + presobj := PITP(framePool.alloc(sizeof(ITP))); + Move(px.mObj, presobj^, sizeof(ITP)); + end; + end; + // next cell + ccidx := cc.next; 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 + // done processing cells, move to next tile + until lw.stepToNextTile(); + result.finishIt(); +end; - Inc(term); // draw last point - //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; +// ////////////////////////////////////////////////////////////////////////// // +// trace box with the given velocity; return object hit (if any) +function TBodyGridBase.traceBox (out ex, ey: Integer; const ax0, ay0, aw, ah: Integer; const dx, dy: Integer; 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; - // first move, to skip starting point - if (xd = term) then exit; - 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; + 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); - {$IF DEFINED(D2F_DEBUG)} - if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ > mHeight*tsize) then raise Exception.Create('raycaster internal error (0)'); - {$ENDIF} + cx0 -= mMinX; cy0 -= mMinY; + cx1 -= mMinX; cy1 -= mMinY; - //if (dbgShowTraceLog) then e_WriteLog(Format('raycast start: (%d,%d)-(%d,%d); xptr^=%d; yptr^=%d', [ax0, ay0, ax1, ay1, xptr^, yptr^]), MSG_NOTIFY); + if (cx1 < 0) or (cy1 < 0) or (cx0 >= mWidth*mTileSize) or (cy0 >= mHeight*mTileSize) then exit; - // restore query coords - Inc(ax0, minx); - Inc(ay0, miny); - //Inc(ax1, minx); - //Inc(ay1, miny); + if (cx0 < 0) then cx0 := 0; + if (cy0 < 0) then cy0 := 0; + if (cx1 >= mWidth*mTileSize) then cx1 := mWidth*mTileSize-1; + if (cy1 >= mHeight*mTileSize) then cy1 := mHeight*mTileSize-1; + // just in case + if (cx0 > cx1) or (cy0 > cy1) then exit; // increase query counter Inc(mLastQuery); @@ -1180,165 +1636,242 @@ begin end; lq := mLastQuery; - ccidx := -1; - // draw it; can omit checks - while (xd <> term) do + for gy := cy0 div mTileSize to cy1 div mTileSize do begin - // check cell(s) - {$IF DEFINED(D2F_DEBUG)} - if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ > mHeight*tsize) then raise Exception.Create('raycaster internal error (0)'); - {$ENDIF} - // new tile? - ga := (yptr^ div tsize)*gw+(xptr^ div tsize); - if (ga <> lastGA) then - begin - // yes - 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; - end - else if wasHit then - begin - result := lastObj; - exit; - end; - end; - lastGA := ga; - ccidx := mGrid[lastGA]; - end; - // has something to process in this tile? - if (ccidx <> -1) then + for gx := cx0 div mTileSize to cx1 div mTileSize do begin - // process cell - curci := ccidx; - hasUntried := false; // this will be set to `true` if we have some proxies we still want to process at the next step - // convert coords to map (to avoid ajdusting coords inside the loop) - x := xptr^+minx; - y := yptr^+miny; - // process cell list - while (curci <> -1) do + ccidx := mGrid[gy*mWidth+gx]; + while (ccidx <> -1) do begin - cc := @mCells[curci]; - for f := 0 to High(TGridCell.bodies) do + 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 - // can we process this proxy? - if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then + px.mQueryMark := lq; // mark as processed + 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 - px.mQueryMark := lq; // mark as processed - if assigned(cb) then - begin - if cb(px.mObj, ptag, x, y, prevx, prevy) then - begin - result := lastObj; - ex := prevx; - ey := prevy; - exit; - end; - end - else + hitpx := px; + result := px.mObj; + minu0 := u0; + if (u0 = 0.0) then begin - // remember this hitpoint if it is nearer than an old one - distSq := distanceSq(ax0, ay0, prevx, prevy); - if (distSq < lastDistSq) then - begin - wasHit := true; - lastDistSq := distSq; - ex := prevx; - ey := prevy; - lastObj := px.mObj; - end; + ex := ax0; + ey := ay0; + exit; end; - end - else - begin - // this is possibly interesting proxy, set "has more to check" flag - hasUntried := true; end; end; end; // next cell - curci := cc.next; + ccidx := cc.next; end; - // still has something interesting in this cell? - if not hasUntried then + 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; +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} + it: Iter; +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; + + it := forEachAtPoint(ax0, ay0, tagmask, false, true); + if (it.length = 0) then begin it.release(); exit; end; + it.release(); + + 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 - // nope, don't process this cell anymore; signal cell completion - ccidx := -1; - if assigned(cb) then + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do begin - if cb(nil, 0, x, y, prevx, prevy) then begin result := lastObj; exit; end; - end - else if wasHit then + 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 + // 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 - result := lastObj; - exit; + {$IF DEFINED(D2F_DEBUG_OTR)} + e_LogWritefln(' filled: cdy=%s; y0=%s; celly0=%s; ay0=%s; ay1=%s', [y0-celly0, y0, celly0, ay0, ay1]); + {$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; - //putPixel(xptr^, yptr^); - // move coords - prevx := xptr^+minx; - prevy := yptr^+miny; - if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2; - xd += stx; + end + else + begin + // horizontal + assert(false); end; end; // ////////////////////////////////////////////////////////////////////////// // -//FIXME! optimize this with real tile walking -function TBodyGridBase.forEachAlongLine (x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1; log: Boolean=false): ITP; -const - tsize = mTileSize; +function TBodyGridBase.traceRay (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; 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; + ex, ey: Integer; +begin + result := traceRay(ex, ey, x0, y0, x1, y1, tagmask); +end; + + +// you are not supposed to understand this +function TBodyGridBase.traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): ITP; +var + lw: TLineWalker; ccidx: Integer; - curci: Integer; cc: PGridCell; px: PBodyProxyRec; lq: LongWord; - minx, miny: Integer; - ptag: Integer; - lastWasInGrid: Boolean; - tbcross: Boolean; - f, tedist: Integer; + f, ptag: Integer; + gw, gh, minx, miny: Integer; + x0, y0: 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); tagmask := tagmask and TagFullMask; - if (tagmask = 0) or not assigned(cb) then exit; + if (tagmask = 0) then exit; + gw := mWidth; + gh := mHeight; 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; + // make query coords (0,0)-based + x0 := ax0-minx; + y0 := ay0-miny; + x1 := ax1-minx; + y1 := ay1-miny; - dx := abs(dx); - dy := abs(dy); + 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 (dx > dy) then d := dx else d := dy; + lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1; - // `x` and `y` will be in grid coords - x := x0-minx; - y := y0-miny; + {$IF DEFINED(D2F_DEBUG)} + //if assigned(dbgRayTraceTileHitCB) then e_LogWritefln('*** traceRay: (%s,%s)-(%s,%s)', [x0, y0, x1, y1]); + {$ENDIF} // increase query counter Inc(mLastQuery); @@ -1346,132 +1879,78 @@ begin begin // just in case of overflow mLastQuery := 1; - for i := 0 to High(mProxies) do mProxies[i].mQueryMark := 0; + for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0; 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; - - if (log) then e_WriteLog(Format('tracing: (%d,%d)-(%d,%d)', [x, y, x1-minx, y1-miny]), MSG_NOTIFY); - - // now trace - i := 0; - while (i < d) do - begin - Inc(i); - // do one step - xerr += dx; - yerr += dy; - // invariant: one of those always changed + repeat + lw.getXY(cx, cy); {$IF DEFINED(D2F_DEBUG)} - if (xerr < 0) and (yerr < 0) then raise Exception.Create('internal bug in grid raycaster (0)'); - {$ENDIF} - 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 - {$IF DEFINED(D2F_DEBUG)} - if ((stepx or stepy) = 0) then raise Exception.Create('internal bug in grid raycaster (1)'); + if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB(cx+mMinX, cy+mMinY); {$ENDIF} + // check tile + ccidx := mGrid[(cy div mTileSize)*gw+(cx div mTileSize)]; + // process cells + wasHit := false; + while (ccidx <> -1) do begin - // check for crossing tile/grid boundary - if (x >= 0) and (y >= 0) and (x <= maxx) and (y <= maxy) then + cc := @mCells[ccidx]; + for f := 0 to GridCellBucketSize-1 do 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)]; - if (log) then e_WriteLog(Format(' stepped to new tile (%d,%d) -- (%d,%d)', [(x div tsize), (y div tsize), x, y]), MSG_NOTIFY); - end - else - if (ccidx = -1) then + 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 - // we have nothing interesting here anymore, jump directly to tile edge - // get minimal distance to tile edges - if (incx < 0) then tedist := x-(x and (not tsize)) else if (incx > 0) then tedist := (x or (tsize+1))-x else tedist := 0; + px.mQueryMark := lq; // mark as processed + // get adjusted proxy coords + px0 := px.mX-minx; + py0 := px.mY-miny; + px1 := px0+px.mWidth-1; + py1 := py0+px.mHeight-1; {$IF DEFINED(D2F_DEBUG)} - if (tedist < 0) then raise Exception.Create('internal bug in grid raycaster (2.x)'); + //if assigned(dbgRayTraceTileHitCB) then e_LogWritefln(' cxy=(%s,%s); pan=(%s,%s)-(%s,%s)', [cx, cy, px0, py0, px1, py1]); {$ENDIF} - if (incy < 0) then f := y-(y and (not tsize)) else if (incy > 0) then f := (y or (tsize+1))-y else f := 0; - {$IF DEFINED(D2F_DEBUG)} - if (f < 0) then raise Exception.Create('internal bug in grid raycaster (2.y)'); - {$ENDIF} - if (tedist = 0) then tedist := f else if (f <> 0) then tedist := minInt(tedist, f); - // do jump - if (tedist > 1) then + // inside? + if firstCell and (x0 >= px0) and (y0 >= py0) and (x0 <= px1) and (y0 <= py1) then begin - if (log) then e_WriteLog(Format(' doing jump from tile (%d,%d) - (%d,%d) by %d steps', [(x div tsize), (y div tsize), x, y, tedist]), MSG_NOTIFY); - xerr += dx*tedist; - yerr += dy*tedist; - if (xerr >= 0) then begin x += incx*((xerr div d)+1); xerr := (xerr mod d)-d; end; - if (yerr >= 0) then begin y += incy*((yerr div d)+1); yerr := (yerr mod d)-d; end; - Inc(i, tedist); - if (log) then e_WriteLog(Format(' jumped to tile (%d,%d) - (%d,%d) by %d steps', [(x div tsize), (y div tsize), x, y, tedist]), MSG_NOTIFY); + // oops + ex := ax0; + ey := ay0; + result := px.mObj; + {$IF DEFINED(D2F_DEBUG)} + if assigned(dbgRayTraceTileHitCB) then e_LogWriteln(' INSIDE!'); + {$ENDIF} + exit; end; - 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 + // do line-vs-aabb test + if lineAABBIntersects(x0, y0, x1, y1, px0, py0, px1-px0+1, py1-py0+1, hx, hy) then begin - px.mQueryMark := lq; // mark as processed - if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; + // hit detected + distSq := distanceSq(x0, y0, hx, hy); + {$IF DEFINED(D2F_DEBUG)} + //if assigned(dbgRayTraceTileHitCB) then e_LogWritefln(' hit=(%s,%s); distSq=%s; lastDistSq=%s', [hx, hy, distSq, lastDistSq]); + {$ENDIF} + if (distSq < lastDistSq) then + begin + lastDistSq := distSq; + ex := hx+minx; + ey := hy+miny; + result := px.mObj; + wasHit := true; + 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); + // 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 exit; + firstCell := false; + // move to next tile + until lw.stepToNextTile(); end;