diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas
index 2afca2f3c16c0db534a6ec68cb4bb665c200e186..6017ad4b492dfbc436da477ccd41a685a3bca7b1 100644 (file)
--- a/src/game/g_grid.pas
+++ b/src/game/g_grid.pas
{.$DEFINE D2F_DEBUG_XXQ}
{.$DEFINE D2F_DEBUG_MOVER}
{$ENDIF}
+{.$DEFINE GRID_USE_ORTHO_ACCEL}
unit g_grid;
interface
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 traceRayWhileIn (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; overload;
- //function traceRayWhileIn (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; 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;
//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)
lq: LongWord;
f, ptag, distSq: Integer;
x0, y0, x1, y1: Integer;
+ // horizontal walker
+ {$IFDEF GRID_USE_ORTHO_ACCEL}
+ wklen, wkstep: Integer;
+ hopt: Boolean;
+ {$ENDIF}
begin
result := Default(ITP);
lastObj := Default(ITP);
//if assigned(dbgRayTraceTileHitCB) then e_WriteLog('1:TRACING!', MSG_NOTIFY);
{$ENDIF}
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
- {$ENDIF}
-
//if (dbgShowTraceLog) then e_WriteLog(Format('raycast start: (%d,%d)-(%d,%d); xptr^=%d; yptr^=%d', [ax0, ay0, ax1, ay1, xptr^, yptr^]), MSG_NOTIFY);
// increase query counter
end;
lq := mLastQuery;
+ {$IFDEF GRID_USE_ORTHO_ACCEL}
+ // if this is strict horizontal trace, use optimized codepath
+ if (ax0 = ax1) or (ay0 = ay1) then
+ begin
+ // horizontal trace: walk the whole tiles, calculating mindist once for each proxy in cell
+ // stx < 0: going left, otherwise `stx` is > 0, and we're going right
+ // vertical trace: walk the whole tiles, calculating mindist once for each proxy in cell
+ // stx < 0: going up, otherwise `stx` is > 0, and we're going down
+ hopt := (ay0 = ay1); // horizontal?
+ if (stx < 0) then wklen := -(term-xd) else wklen := term-xd;
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln('optimized htrace; wklen=%d', [wklen]);
+ {$ENDIF}
+ ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
+ // 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
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' htrace; ga=%d; x=%d, y=%d; y=%d; y=%d', [ga, xptr^+minx, yptr^+miny, y, ay0]);
+ {$ENDIF}
+ // new tile?
+ if (ga <> lastGA) then
+ begin
+ lastGA := ga;
+ ccidx := mGrid[lastGA];
+ // convert coords to map (to avoid ajdusting coords inside the loop)
+ if hopt then x := xptr^+minx else y := yptr^+miny;
+ while (ccidx <> -1) do
+ begin
+ cc := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
+ begin
+ if (cc.bodies[f] = -1) then break;
+ px := @mProxies[cc.bodies[f]];
+ ptag := px.mTag;
+ if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) and
+ // constant coord should be inside
+ ((hopt and (y >= px.mY) and (y < px.mY+px.mHeight)) or
+ ((not hopt) and (x >= px.mX) and (x < px.mX+px.mWidth))) 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
+ begin
+ if assigned(cb) then
+ begin
+ if cb(px.mObj, ptag, x, y, x, y) then
+ begin
+ result := lastObj;
+ ex := prevx;
+ ey := prevy;
+ exit;
+ end;
+ x := xptr^+minx;
+ end
+ else
+ begin
+ distSq := distanceSq(ax0, ay0, x, y);
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' EMBEDDED hhit(%d): a=(%d,%d), h=(%d,%d), distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, distSq, lastDistSq]);
+ {$ENDIF}
+ if (distSq < lastDistSq) then
+ begin
+ ex := x;
+ ey := y;
+ result := px.mObj;
+ exit;
+ end;
+ end;
+ continue;
+ end;
+ // remember this hitpoint if it is nearer than an old one
+ if hopt then
+ begin
+ prevy := y;
+ if (stx < 0) then
+ begin
+ // going left
+ if (x < px.mX) then continue;
+ prevx := px.mX+px.mWidth;
+ end
+ else
+ begin
+ // going right
+ if (x > px.mX{+px.mWidth}) then continue;
+ prevx := px.mX-1;
+ end;
+ end
+ else
+ begin
+ prevx := x;
+ if (stx < 0) then
+ begin
+ // going up
+ if (y < px.mY) then continue;
+ prevy := px.mY+px.mHeight;
+ end
+ else
+ begin
+ // going down
+ if (y > px.mY{+px.mHeight}) then continue;
+ prevy := px.mY-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;
+ ex := prevx;
+ ey := prevy;
+ exit;
+ end;
+ x := xptr^+minx;
+ y := yptr^+miny;
+ end
+ else
+ begin
+ distSq := distanceSq(ax0, ay0, prevx, prevy);
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' hhit(%d): a=(%d,%d), h=(%d,%d), p=(%d,%d), distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, prevx, prevy, distSq, lastDistSq]);
+ {$ENDIF}
+ if (distSq < lastDistSq) then
+ begin
+ wasHit := true;
+ lastDistSq := distSq;
+ ex := prevx;
+ ey := prevy;
+ lastObj := px.mObj;
+ end;
+ end;
+ end;
+ end;
+ // next cell
+ ccidx := cc.next;
+ end;
+ if wasHit and not assigned(cb) then begin result := lastObj; exit; end;
+ end;
+ // skip to next tile
+ if hopt then
+ begin
+ if (stx > 0) then
+ begin
+ // to the right
+ wkstep := ((xptr^ or (mTileSize-1))+1)-xptr^;
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' right step: wklen=%d; wkstep=%d', [wklen, wkstep]);
+ {$ENDIF}
+ if (wkstep >= wklen) then break;
+ Inc(xptr^, wkstep);
+ Inc(ga);
+ end
+ else
+ begin
+ // to the left
+ wkstep := xptr^-((xptr^ and (not (mTileSize-1)))-1);
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' left step: wklen=%d; wkstep=%d', [wklen, wkstep]);
+ {$ENDIF}
+ if (wkstep >= wklen) then break;
+ Dec(xptr^, wkstep);
+ Dec(ga);
+ end;
+ end
+ else
+ begin
+ if (stx > 0) then
+ begin
+ // to the down
+ wkstep := ((yptr^ or (mTileSize-1))+1)-yptr^;
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' down step: wklen=%d; wkstep=%d', [wklen, wkstep]);
+ {$ENDIF}
+ if (wkstep >= wklen) then break;
+ Inc(yptr^, wkstep);
+ Inc(ga, mHeight);
+ end
+ else
+ begin
+ // to the up
+ wkstep := yptr^-((yptr^ and (not (mTileSize-1)))-1);
+ {$IF DEFINED(D2F_DEBUG)}
+ if dbgShowTraceLog then e_LogWritefln(' up step: wklen=%d; wkstep=%d', [wklen, wkstep]);
+ {$ENDIF}
+ if (wkstep >= wklen) then break;
+ Dec(yptr^, wkstep);
+ Dec(ga, mHeight);
+ 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;
+ exit;
+ end;
+ {$ENDIF}
+
+ {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
+ if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
+ {$ENDIF}
+
ccidx := -1;
- // draw it; can omit checks
+ // can omit checks
while (xd <> term) do
begin
// check cell(s)
end;
-// ////////////////////////////////////////////////////////////////////////// //
-(*
-function TBodyGridBase.traceRayWhileIn (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; overload;
-var
- ex, ey: Integer;
-begin
- result := traceRayWhileIn(ex, ey, x0, y0, x1, y1, tagmask);
-end;
-
-
-// FUCKIN' PASTA!
-function TBodyGridBase.traceRayWhileIn (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): ITP;
-const
- tsize = mTileSize;
-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;
- cc: PGridCell;
- px: PBodyProxyRec;
- lq: LongWord;
- f, ptag, distSq: Integer;
- x0, y0, x1, y1: Integer;
- inx, iny: Integer;
-begin
- result := Default(ITP);
- lastObj := Default(ITP);
- 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; // doesn't matter
-
- // we should start inside
- if (forEachAtPoint(ax0, ay0, nil, tagmask, @ptag) = nil) then
- begin
- ex := ax0; // why not?
- ey := ay0; // why not?
- exit;
- end;
-
- lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1;
-
- 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;
-
- // 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
- 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;
- 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
- //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;
-
- // first move, to skip starting point
- // DON'T DO THIS! loop will take care of that
- if (xd = term) then
- begin
- result := forEachAtPoint(ax0, ay0, nil, tagmask, @ptag);
- if (result <> nil) and ((ptag and tagmask) <> 0) then result := nil;
- exit;
- end;
-
- prevx := xptr^+minx;
- prevy := yptr^+miny;
-
- // 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;
-
- ccidx := -1;
- // draw it; can omit checks
- while (xd <> term) do
- begin
- // check cell(s)
- // new tile?
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- if (ga <> lastGA) then
- begin
- // yes
- lastGA := ga;
- ccidx := mGrid[lastGA];
- // no objects in cell == exit
- if (ccidx = -1) then exit;
- end;
- // has something to process in this tile?
- if (ccidx <> -1) then
- begin
- // process cell
- curci := ccidx;
- // convert coords to map (to avoid ajdusting coords inside the loop)
- x := xptr^+minx;
- y := yptr^+miny;
- wasHit := false;
- // 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 (px.mQueryMark <> lq) then
- begin
-function lineAABBIntersects (x0, y0, x1, y1: Integer; bx, by, bw, bh: Integer; out inx, iny: Integer): Boolean;
- // 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
- begin
- px.mQueryMark := lq; // mark as processed
- if ((ptag and tagmask) = 0) then
- begin
- result := px.mObj;
- ex := x;
- ey := y;
- exit;
- end;
- // march out of the panel/cell
- while (xd <> term) do
- begin
- if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
- xd += stx;
- // new cell?
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- if (ga <> lastGA) then break;
- // out of panel?
- if not ((x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight)) then break;
- end;
- end;
- end;
- end;
- // next cell
- curci := cc.next;
- end;
- // still has something interesting in this cell?
- if not hasUntried then
- begin
- // nope, don't process this cell anymore; signal cell completion
- ccidx := -1;
- if assigned(cb) then
- begin
- if cb(nil, 0, x, y, prevx, prevy) then begin result := lastObj; exit; end;
- end
- else if wasHit then
- begin
- result := lastObj;
- 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;
- // we can travel less than one cell
- if wasHit and not assigned(cb) then
- begin
- result := lastObj;
- end
- else
- begin
- ex := ax1; // why not?
- ey := ay1; // why not?
- end;
-end;
-*)
-
-
end.