diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas
index 882ef3a4504ac3cfae567a8b9906c084065a825a..280fd90f3fd967f0753a31ee69cb6386ceb5fd05 100644 (file)
--- a/src/game/g_grid.pas
+++ b/src/game/g_grid.pas
interface
+const
+ GridTileSize = 32; // must be power of two!
type
TBodyProxyId = Integer;
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;
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
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;
mProxyFree: TBodyProxyId; // free
mProxyCount: Integer; // currently used
mProxyMaxCount: Integer;
+ mInQuery: Boolean;
public
dbgShowTraceLog: Boolean;
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;
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;
// 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 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: TGridRayQueryCB; tagmask: Integer=-1): ITP; overload;
- function traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP;
+ 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;
- //function traceOrthoRayWhileIn (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; overload;
- //function traceOrthoRayWhileIn (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; 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
//WARNING: don't change tags in callbacks here!
- function forEachAlongLine (const x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1; log: Boolean=false): ITP;
+ 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;
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;
// 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;
+// 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;
+//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;
-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;
+//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
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;
// ////////////////////////////////////////////////////////////////////////// //
-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 DEFINED(D2F_DEBUG)}
- dbgRayTraceTileHitCB := nil;
- {$ENDIF}
- {
+ 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;
// ////////////////////////////////////////////////////////////////////////// //
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;
procedure TBodyGridBase.forEachBodyCell (body: TBodyProxyId; cb: TCellQueryCB);
var
- g, f, cidx: Integer;
+ 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
- cidx := mGrid[g];
- while (cidx <> -1) do
+ ccidx := mGrid[g];
+ while (ccidx <> -1) do
begin
- cc := @mCells[cidx];
+ 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
- cidx := cc.next;
+ ccidx := cc.next;
end;
end;
end;
function TBodyGridBase.forEachInCell (x, y: Integer; cb: TGridQueryCB): ITP;
var
- f, cidx: Integer;
+ f, ccidx: Integer;
cc: PGridCell;
begin
result := Default(ITP);
Dec(x, mMinX);
Dec(y, mMinY);
if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y > mHeight*mTileSize) then exit;
- cidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
- while (cidx <> -1) do
+ ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
+ while (ccidx <> -1) do
begin
- cc := @mCells[cidx];
+ 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
- cidx := cc.next;
+ ccidx := cc.next;
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
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
// ////////////////////////////////////////////////////////////////////////// //
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;
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;
// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.inserter (grida: Integer; bodyId: TBodyProxyId): Boolean;
var
- cidx: Integer;
+ ccidx: Integer;
pc: Integer;
pi: PGridCell;
f: Integer;
if (pc <> -1) then
begin
{$IF DEFINED(D2F_DEBUG)}
- cidx := pc;
- while (cidx <> -1) do
+ ccidx := pc;
+ while (ccidx <> -1) do
begin
- pi := @mCells[cidx];
+ 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;
- cidx := pi.next;
+ ccidx := pi.next;
end;
{$ENDIF}
- cidx := pc;
- while (cidx <> -1) do
+ ccidx := pc;
+ while (ccidx <> -1) do
begin
- pi := @mCells[cidx];
+ pi := @mCells[ccidx];
// check "has room" flag
if (pi.bodies[GridCellBucketSize-1] = -1) then
begin
raise Exception.Create('internal error in grid inserter');
end;
// no room, go to next cell in list (if there is any)
- cidx := pi.next;
+ ccidx := pi.next;
end;
// no room in cells, add new cell to list
end;
// either no room, or no cell at all
- cidx := allocCell();
- pi := @mCells[cidx];
+ ccidx := allocCell();
+ pi := @mCells[ccidx];
pi.bodies[0] := bodyId;
pi.bodies[1] := -1;
pi.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);
+ mGrid[grida] := ccidx;
end;
function TBodyGridBase.remover (grida: Integer; bodyId: TBodyProxyId): Boolean;
var
f, c: Integer;
- pidx, cidx: Integer;
+ pidx, ccidx: Integer;
pc: PGridCell;
begin
result := false; // never stop
// find and remove cell
pidx := -1; // previous cell index
- cidx := mGrid[grida]; // current cell index
- while (cidx <> -1) do
+ ccidx := mGrid[grida]; // current cell index
+ while (ccidx <> -1) do
begin
- pc := @mCells[cidx];
+ pc := @mCells[ccidx];
for f := 0 to GridCellBucketSize-1 do
begin
if (pc.bodies[f] = bodyId) then
begin
// this cell contains no elements, remove it
if (pidx = -1) then mGrid[grida] := pc.next else mCells[pidx].next := pc.next;
- freeCell(cidx);
+ freeCell(ccidx);
exit;
end;
// remove element from bucket
exit;
end;
end;
- pidx := cidx;
- cidx := pc.next;
+ pidx := ccidx;
+ ccidx := pc.next;
end;
end;
-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;
// 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);
+ //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
end;
end;
+
//TODO: optimize for horizontal/vertical moves
procedure TBodyGridBase.moveBody (body: TBodyProxyId; nx, ny: Integer);
var
px.mY := ny+mMinY;
end;
+
procedure TBodyGridBase.resizeBody (body: TBodyProxyId; nw, nh: Integer);
var
px: PBodyProxyRec;
{$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);
{$ENDIF}
- if ((x0+w) div mTileSize <> (x0+nw) div mTileSize) or
- ((y0+h) div mTileSize <> (y0+nh) div mTileSize) then
+ if ((x0+w-1) div mTileSize <> (x0+nw-1) div mTileSize) or
+ ((y0+h-1) div mTileSize <> (y0+nh-1) div mTileSize) then
begin
// crossed tile boundary, do heavy work
- removeInternal(body);
+ //removeInternal(body);
+ forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
px.mWidth := nw;
px.mHeight := nh;
- insertInternal(body);
+ //insertInternal(body);
+ forGridRect(px.mX, px.mY, nw, nh, inserter, body);
end
else
begin
end;
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.atCellInPoint (x, y: Integer): TAtPointEnumerator;
+var
+ ccidx: Integer = -1;
+begin
+ Dec(x, mMinX);
+ Dec(y, mMinY);
+ if (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize) then ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
+ result := TAtPointEnumerator.Create(mCells, ccidx, getProxyById);
+end;
+
+
// ////////////////////////////////////////////////////////////////////////// //
// no callback: return `true` on the first hit
function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP;
if (assigned(cb)) then e_WriteLog(Format('2: grid pointquery: (%d,%d); lq=%u', [x, y, lq]), MSG_NOTIFY);
{$ENDIF}
- while (curci <> -1) do
+ 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 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}
+ // 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 DEFINED(D2F_DEBUG_XXQ)}
- if (assigned(cb)) then e_WriteLog(Format(' cell #%d', [curci]), MSG_NOTIFY);
- {$ENDIF}
- cc := @mCells[curci];
- for f := 0 to GridCellBucketSize-1 do
+ if (x0 < 0) or (x0 >= mWidth*mTileSize) then exit; // oops
+ // vertical
+ if (y0 < y1) then
begin
- if (cc.bodies[f] = -1) then break;
- px := @mProxies[cc.bodies[f]];
- {$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);
- {$ENDIF}
- // shit. has to do it this way, so i can change tag in callback
- if (px.mQueryMark <> lq) then
+ // down
+ if (y1 < 0) or (y0 >= mHeight*mTileSize) then exit;
+ //if (ay0 < 0) then ay0 := 0;
+ if (y0 < 0) then exit;
+ if (y1 >= mHeight*mTileSize) then y1 := mHeight*mTileSize-1;
+ dy := 1;
+ end
+ else
+ begin
+ // up
+ if (y0 < 0) or (y1 >= mHeight*mTileSize) then exit;
+ //if (ay1 < 0) then ay1 := 0;
+ if (y1 < 0) then exit;
+ if (y0 >= mHeight*mTileSize) then y0 := mHeight*mTileSize-1;
+ dy := -1;
+ end;
+ // check tile
+ while true do
+ begin
+ ccidx := mGrid[(y0 div mTileSize)*mWidth+(x0 div mTileSize)];
+ FillChar(filled, sizeof(filled), 0);
+ celly0 := y0 and (not (mTileSize-1));
+ celly1 := celly0+mTileSize-1;
+ while (ccidx <> -1) do
begin
- px.mQueryMark := lq;
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and
- (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then
+ cc := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
begin
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag) then
- begin
- result := px.mObj;
- if (exittag <> nil) then exittag^ := ptag;
- exit;
- end;
- end
- else
+ if (cc.bodies[f] = -1) then break;
+ px := @mProxies[cc.bodies[f]];
+ ptag := px.mTag;
+ if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and
+ (ax0 >= px.x0) and (ax0 <= px.x1) then
begin
- result := px.mObj;
- if (exittag <> nil) then exittag^ := ptag;
- exit;
+ // bound c0 and c1 to cell
+ c0 := nclamp(px.y0-miny, celly0, celly1);
+ c1 := nclamp(px.y1-miny, celly0, celly1);
+ // fill the thing
+ {$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);
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 GridCellBucketSize-1 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]];
- // 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;
+ px.mQueryMark := lq; // mark as processed
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;
+ // 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 (const 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; const 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
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;
+ {$ENDIF}
+ // skipper
+ xdist, ydist: Integer;
begin
result := Default(ITP);
lastObj := Default(ITP);
gh := mHeight;
minx := mMinX;
miny := mMinY;
- maxx := gw*tsize-1;
- maxy := gh*tsize-1;
+ maxx := gw*mTileSize-1;
+ maxy := gh*mTileSize-1;
{$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);
if (dsx < dsy) then
begin
+ //swapped := true;
xptr := @yd;
yptr := @xd;
swapInt(x0, y0);
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;
// 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
*)
{$IF DEFINED(D2F_DEBUG)}
- if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ >= gh*tsize) then raise Exception.Create('raycaster internal error (0)');
+ if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*mTileSize) and (yptr^ >= gh*mTileSize) then raise Exception.Create('raycaster internal error (0)');
{$ENDIF}
// DON'T DO THIS! loop will take care of that
//lastGA := (yptr^ div tsize)*gw+(xptr^ div tsize);
//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 mInQuery then raise Exception.Create('recursive queries aren''t supported');
+ mInQuery := true;
+
// increase query counter
Inc(mLastQuery);
if (mLastQuery = 0) then
lq := mLastQuery;
{$IFDEF GRID_USE_ORTHO_ACCEL}
- // if this is strict horizontal trace, use optimized codepath
+ // if this is strict horizontal/vertical trace, use optimized codepath
if (ax0 = ax1) or (ay0 = ay1) then
begin
// horizontal trace: walk the whole tiles, calculating mindist once for each proxy in cell
// stx < 0: going left, otherwise `stx` is > 0, and we're going right
// vertical trace: walk the whole tiles, calculating mindist once for each proxy in cell
- // stx < 0: going up, otherwise `stx` is > 0, and we're going down
+ // stx < 0: going up, otherwise `stx` is > 0, and we're going down
hopt := (ay0 = ay1); // horizontal?
- if (stx < 0) then wklen := -(term-xd) else wklen := term-xd;
+ if (stx < 0) then begin {wksign := -1;} wklen := -(term-xd); end else begin {wksign := 1;} wklen := term-xd; end;
{$IF DEFINED(D2F_DEBUG)}
if dbgShowTraceLog then e_LogWritefln('optimized htrace; wklen=%d', [wklen]);
{$ENDIF}
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
+ ga := (yptr^ div mTileSize)*gw+(xptr^ div mTileSize);
// one of those will never change
x := xptr^+minx;
y := yptr^+miny;
- {$IF DEFINED(D2F_DEBUG)}
- if hopt then
- begin
- if (y <> ay0) then raise Exception.Create('htrace fatal internal error');
- end
- else
- begin
- if (x <> ax0) then raise Exception.Create('vtrace fatal internal error');
- end;
- {$ENDIF}
while (wklen > 0) do
begin
{$IF DEFINED(D2F_DEBUG)}
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.mY) and (y < px.mY+px.mHeight)) or
- ((not hopt) and (x >= px.mX) and (x < px.mX+px.mWidth))) then
+ ((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.mX) and (x < px.mX+px.mWidth-1)) or
- ((not hopt) and (y > px.mY) and (y < px.mY+px.mHeight-1)) then
+ 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 := lastObj;
- ex := prevx;
- ey := prevy;
+ result := px.mObj;
+ ex := x;
+ ey := y;
+ mInQuery := false;
exit;
end;
- x := xptr^+minx;
end
else
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.mX) then continue;
- prevx := px.mX+px.mWidth;
+ 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.mX{+px.mWidth}) then continue;
- prevx := px.mX-1;
+ 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.mY) then continue;
- prevy := px.mY+px.mHeight;
+ 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.mY{+px.mHeight}) then continue;
- prevy := px.mY-1;
+ 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 (stx < 0) then
- begin
- if hopt then x := prevx-1 else y := prevy-1;
- end
- else
- begin
- if hopt then x := prevx+1 else y := prevy+1;
- end;
if cb(px.mObj, ptag, x, y, prevx, prevy) then
begin
- result := lastObj;
+ result := px.mObj;
ex := prevx;
ey := prevy;
+ mInQuery := false;
exit;
end;
- x := xptr^+minx;
- y := yptr^+miny;
end
else
begin
// next cell
ccidx := cc.next;
end;
- if wasHit and not assigned(cb) then begin result := lastObj; exit; 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
{$ENDIF}
if (wkstep >= wklen) then break;
Inc(yptr^, wkstep);
- Inc(ga, mHeight);
+ Inc(ga, mWidth);
end
else
begin
{$ENDIF}
if (wkstep >= wklen) then break;
Dec(yptr^, wkstep);
- Dec(ga, mHeight);
+ 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 tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
+ if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div mTileSize*mTileSize)+minx, (yptr^ div mTileSize*mTileSize)+miny);
{$ENDIF}
+ //e_LogWritefln('*********************', []);
ccidx := -1;
// can omit checks
while (xd <> term) do
begin
// check cell(s)
{$IF DEFINED(D2F_DEBUG)}
- if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ >= gh*tsize) then raise Exception.Create('raycaster internal error (0)');
+ 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);
{$ENDIF}
begin
// yes
{$IF DEFINED(D2F_DEBUG)}
- if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
+ if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div mTileSize*mTileSize)+minx, (yptr^ div mTileSize*mTileSize)+miny);
{$ENDIF}
if (ccidx <> -1) then
begin
// signal cell completion
if assigned(cb) then
begin
- if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; exit; end;
+ if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; mInQuery := false; exit; end;
end
else if wasHit then
begin
result := lastObj;
+ mInQuery := false;
exit;
end;
end;
begin
if cb(px.mObj, ptag, x, y, prevx, prevy) then
begin
- result := lastObj;
+ result := px.mObj;
ex := prevx;
ey := prevy;
+ mInQuery := false;
exit;
end;
- (*
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- distSq := distanceSq(ax0, ay0, prevx, prevy);
- 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);
- if (distSq < lastDistSq) then
- begin
- wasHit := true;
- lastDistSq := distSq;
- ex := prevx;
- ey := prevy;
- lastObj := px.mObj;
- end;
- {$ENDIF}
- *)
end
else
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;
ex := ax1; // why not?
ey := ay1; // why not?
end;
-end;
-
-
-// ////////////////////////////////////////////////////////////////////////// //
-//FIXME! optimize this with real tile walking
-function TBodyGridBase.forEachAlongLine (const x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1; log: Boolean=false): 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;
- //tedist: Integer;
-begin
- log := false;
- result := Default(ITP);
- tagmask := tagmask and TagFullMask;
- if (tagmask = 0) or not assigned(cb) 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;
-
- if (incx = 0) and (incy = 0) then exit; // just incase
-
- 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
- begin
- // just in case of overflow
- mLastQuery := 1;
- for i := 0 to High(mProxies) do mProxies[i].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
- {$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)');
- {$ENDIF}
- 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)];
- 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
- begin
- // we have nothing interesting here anymore, jump directly to tile edge
- (*
- if (incx = 0) then
- begin
- // vertical line
- if (incy < 0) then tedist := y-(y and (not tsize)) else tedist := (y or (tsize-1))-y;
- if (tedist > 1) then
- begin
- if (log) then e_WriteLog(Format(' doing vertical jump from tile (%d,%d) - (%d,%d) by %d steps', [(x div tsize), (y div tsize), x, y, tedist]), MSG_NOTIFY);
- y += incy*tedist;
- 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);
- end;
- end
- else if (incy = 0) then
- begin
- // horizontal line
- if (incx < 0) then tedist := x-(x and (not tsize)) else tedist := (x or (tsize-1))-x;
- if (tedist > 1) then
- begin
- if (log) then e_WriteLog(Format(' doing horizontal jump from tile (%d,%d) - (%d,%d) by %d steps', [(x div tsize), (y div tsize), x, y, tedist]), MSG_NOTIFY);
- x += incx*tedist;
- 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);
- end;
- end;
- *)
- (*
- else if (
- // 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;
- {$IF DEFINED(D2F_DEBUG)}
- if (tedist < 0) then raise Exception.Create('internal bug in grid raycaster (2.x)');
- {$ENDIF}
- if (incy < 0) then f := y-(y and (not tsize)) else if (incy > 0) then f := (y or (tsize+1))-y else f := 0;
- {$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
- 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);
- 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 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; 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;