X-Git-Url: https://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fgame%2Fg_grid.pas;h=c1a5f0777cd25a2416e92da03da53834e744a571;hb=f0d4e199f20938613340c53ff24e1eb7a6cc2481;hp=8ff01a629340b582ad58c0cb40046f8b80c251a3;hpb=829537fc7b2b29baaab7287e54fba2cdd8d00b5c;p=d2df-sdl.git diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas index 8ff01a6..c1a5f07 100644 --- a/src/game/g_grid.pas +++ b/src/game/g_grid.pas @@ -15,7 +15,6 @@ *) // universal spatial grid {$INCLUDE ../shared/a_modes.inc} -{$DEFINE grid_use_buckets} unit g_grid; interface @@ -27,6 +26,11 @@ type generic TBodyGridBase = class(TObject) 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 + + const TagDisabled = $40000000; + const TagFullMask = $3fffffff; private const @@ -39,9 +43,9 @@ type TBodyProxyRec = record private mX, mY, mWidth, mHeight: Integer; // aabb - mQueryMark: DWord; // was this object visited at this query? + mQueryMark: LongWord; // was this object visited at this query? mObj: ITP; - mTag: Integer; + mTag: Integer; // `TagDisabled` set: disabled ;-) nextLink: TBodyProxyId; // next free or nothing private @@ -50,73 +54,286 @@ type PGridCell = ^TGridCell; TGridCell = record - {$IFDEF grid_use_buckets} bodies: array [0..GridCellBucketSize-1] of Integer; // -1: end of list - {$ELSE} - body: Integer; - {$ENDIF} next: Integer; // in this cell; index in mCells end; - TGridInternalCB = function (grida: Integer): Boolean of object; // return `true` to stop + TGridInternalCB = function (grida: Integer; bodyId: TBodyProxyId): Boolean of object; // return `true` to stop + + private + //mTileSize: Integer; + const mTileSize = GridDefaultTileSize; private - mTileSize: Integer; 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 mFreeCell: Integer; // first free cell index or -1 - mLastQuery: DWord; + mLastQuery: LongWord; mUsedCells: Integer; mProxies: array of TBodyProxyRec; mProxyFree: TBodyProxyId; // free mProxyCount: Integer; // currently used mProxyMaxCount: Integer; - mUData: TBodyProxyId; // for inserter/remover - mTagMask: Integer; // for iterator - mItCB: TGridQueryCB; // for iterator + public + dbgShowTraceLog: Boolean; private - function allocCell: Integer; + function allocCell (): Integer; procedure freeCell (idx: Integer); // `next` is simply overwritten function allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId; procedure freeProxy (body: TBodyProxyId); - procedure insert (body: TBodyProxyId); - procedure remove (body: TBodyProxyId); + procedure insertInternal (body: TBodyProxyId); + procedure removeInternal (body: TBodyProxyId); + + function forGridRect (x, y, w, h: Integer; cb: TGridInternalCB; bodyId: TBodyProxyId): Boolean; - function forGridRect (x, y, w, h: Integer; cb: TGridInternalCB): Boolean; + function inserter (grida: Integer; bodyId: TBodyProxyId): Boolean; + function remover (grida: Integer; bodyId: TBodyProxyId): Boolean; - function inserter (grida: Integer): Boolean; - function remover (grida: Integer): Boolean; - function iterator (grida: Integer): Boolean; + function getProxyEnabled (pid: TBodyProxyId): Boolean; inline; + procedure setProxyEnabled (pid: TBodyProxyId; val: Boolean); inline; + + function getGridWidthPx (): Integer; inline; + function getGridHeightPx (): Integer; inline; public - constructor Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer; aTileSize: Integer=GridDefaultTileSize); + constructor Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer{; aTileSize: Integer=GridDefaultTileSize}); destructor Destroy (); override; - function insertBody (aObj: ITP; ax, ay, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxyId; - procedure removeBody (aObj: TBodyProxyId); // WARNING! this WILL destroy proxy! + function insertBody (aObj: ITP; ax, ay, aWidth, aHeight: Integer; aTag: Integer=-1): TBodyProxyId; + procedure removeBody (body: TBodyProxyId); // WARNING! this WILL destroy proxy! procedure moveBody (body: TBodyProxyId; dx, dy: Integer); procedure resizeBody (body: TBodyProxyId; sx, sy: Integer); procedure moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer); - function forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean; + function insideGrid (x, y: Integer): Boolean; inline; + + // `false` if `body` is surely invalid + function getBodyXY (body: TBodyProxyId; out rx, ry: Integer): Boolean; inline; + + //WARNING: don't modify grid while any query is in progress (no checks are made!) + // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) + // no callback: return `true` on the first hit + function forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1; allowDisabled: Boolean=false): 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) + // no callback: return `true` on the first hit + function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; 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; + + //WARNING: don't modify grid while any query is in progress (no checks are made!) + // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it) + // trace line along the grid, calling `cb` for all objects in passed cells, in no particular order + function forEachAlongLine (x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1): ITP; procedure dumpStats (); + + //WARNING! no sanity checks! + property proxyEnabled[pid: TBodyProxyId]: Boolean read getProxyEnabled write setProxyEnabled; + + property gridX0: Integer read mMinX; + property gridY0: Integer read mMinY; + property gridWidth: Integer read getGridWidthPx; // in pixels + property gridHeight: Integer read getGridHeightPx; // in pixels 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; + +procedure swapInt (var a: Integer; var b: Integer); inline; +function distanceSq (x0, y0, x1, y1: Integer): Integer; inline; + + implementation uses SysUtils, e_log; +// ////////////////////////////////////////////////////////////////////////// // +procedure swapInt (var a: Integer; var b: Integer); inline; var t: Integer; begin t := a; a := b; b := t; end; + +function distanceSq (x0, y0, x1, y1: Integer): Integer; inline; begin result := (x1-x0)*(x1-x0)+(y1-y0)*(y1-y0); 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; +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; + + // clip rectange + wx0 := bx; + wy0 := by; + wx1 := bx+bw-1; + wy1 := by+bh-1; + + // 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 + d0 := @yd; + d1 := @xd; + swapInt(x0, y0); + swapInt(x1, y1); + swapInt(dsx, dsy); + swapInt(wx0, wy0); + swapInt(wx1, wy1); + swapInt(stx, sty); + end + else + begin + d0 := @xd; + d1 := @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; + + inx := d0^; + iny := d1^; + result := true; +end; + + // ////////////////////////////////////////////////////////////////////////// // procedure TBodyGridBase.TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer); begin @@ -132,19 +349,22 @@ end; // ////////////////////////////////////////////////////////////////////////// // -constructor TBodyGridBase.Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer; aTileSize: Integer=GridDefaultTileSize); +constructor TBodyGridBase.Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer{; aTileSize: Integer=GridDefaultTileSize}); var idx: Integer; begin + dbgShowTraceLog := false; + { if aTileSize < 1 then aTileSize := 1; if aTileSize > 8192 then aTileSize := 8192; // arbitrary limit - if aPixWidth < aTileSize then aPixWidth := aTileSize; - if aPixHeight < aTileSize then aPixHeight := aTileSize; mTileSize := aTileSize; + } + if (aPixWidth < mTileSize) then aPixWidth := mTileSize; + if (aPixHeight < mTileSize) then aPixHeight := mTileSize; mMinX := aMinPixX; mMinY := aMinPixY; - mWidth := (aPixWidth+aTileSize-1) div aTileSize; - mHeight := (aPixHeight+aTileSize-1) div aTileSize; + mWidth := (aPixWidth+mTileSize-1) div mTileSize; + mHeight := (aPixHeight+mTileSize-1) div mTileSize; SetLength(mGrid, mWidth*mHeight); SetLength(mCells, mWidth*mHeight); SetLength(mProxies, 8192); @@ -152,11 +372,7 @@ begin // init free list for idx := 0 to High(mCells) do begin - {$IFDEF grid_use_buckets} mCells[idx].bodies[0] := -1; - {$ELSE} - mCells[idx].body := -1; - {$ENDIF} mCells[idx].next := idx+1; end; mCells[High(mCells)].next := -1; // last cell @@ -170,9 +386,6 @@ begin mProxyFree := 0; mProxyCount := 0; mProxyMaxCount := 0; - mUData := 0; - mTagMask := -1; - mItCB := nil; e_WriteLog(Format('created grid with size: %dx%d (tile size: %d); pix: %dx%d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize]), MSG_NOTIFY); end; @@ -186,6 +399,7 @@ begin end; +// ////////////////////////////////////////////////////////////////////////// // procedure TBodyGridBase.dumpStats (); var idx, mcb, cidx, cnt: Integer; @@ -206,7 +420,61 @@ begin end; -function TBodyGridBase.allocCell: Integer; +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.getGridWidthPx (): Integer; inline; begin result := mWidth*mTileSize; end; +function TBodyGridBase.getGridHeightPx (): Integer; inline; begin result := mHeight*mTileSize; end; + + +function TBodyGridBase.insideGrid (x, y: Integer): Boolean; inline; +begin + // fix coords + Dec(x, mMinX); + Dec(y, mMinY); + result := (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize); +end; + + +function TBodyGridBase.getBodyXY (body: TBodyProxyId; out rx, ry: Integer): Boolean; inline; +begin + if (body >= 0) and (body < Length(mProxies)) then + begin + with mProxies[body] do begin rx := mX; ry := mY; end; + result := true; + end + else + begin + rx := 0; + ry := 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; +end; + + +procedure TBodyGridBase.setProxyEnabled (pid: TBodyProxyId; val: Boolean); inline; +begin + if (pid >= 0) then + begin + if val then + begin + mProxies[pid].mTag := mProxies[pid].mTag and not TagDisabled; + end + else + begin + mProxies[pid].mTag := mProxies[pid].mTag or TagDisabled; + end; + end; +end; + + +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.allocCell (): Integer; var idx: Integer; begin @@ -217,11 +485,7 @@ begin SetLength(mCells, mFreeCell+32768); // arbitrary number for idx := mFreeCell to High(mCells) do begin - {$IFDEF grid_use_buckets} mCells[idx].bodies[0] := -1; - {$ELSE} - mCells[idx].body := -1; - {$ENDIF} mCells[idx].next := idx+1; end; mCells[High(mCells)].next := -1; // last cell @@ -229,6 +493,7 @@ begin result := mFreeCell; mFreeCell := mCells[result].next; mCells[result].next := -1; + mCells[result].bodies[0] := -1; Inc(mUsedCells); //e_WriteLog(Format('grid: allocated new cell #%d (total: %d)', [result, mUsedCells]), MSG_NOTIFY); end; @@ -236,10 +501,10 @@ end; procedure TBodyGridBase.freeCell (idx: Integer); begin - if (idx >= 0) and (idx < High(mCells)) then + if (idx >= 0) and (idx < Length(mCells)) then begin //if mCells[idx].body = -1 then exit; // the thing that should not be - //mCells[idx].body := -1; + mCells[idx].bodies[0] := -1; mCells[idx].next := mFreeCell; mFreeCell := idx; Dec(mUsedCells); @@ -247,6 +512,7 @@ begin end; +// ////////////////////////////////////////////////////////////////////////// // function TBodyGridBase.allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId; var olen, idx: Integer; @@ -285,9 +551,13 @@ begin end; -function TBodyGridBase.forGridRect (x, y, w, h: Integer; cb: TGridInternalCB): Boolean; +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.forGridRect (x, y, w, h: Integer; cb: TGridInternalCB; bodyId: TBodyProxyId): Boolean; +const + tsize = mTileSize; var gx, gy: Integer; + gw, gh: Integer; begin result := false; if (w < 1) or (h < 1) or not assigned(cb) then exit; @@ -296,44 +566,46 @@ begin Dec(y, mMinY); // go on if (x+w <= 0) or (y+h <= 0) then exit; - if (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then exit; - for gy := y div mTileSize to (y+h-1) div mTileSize do + 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 begin if (gy < 0) then continue; - if (gy >= mHeight) then break; - for gx := x div mTileSize to (x+w-1) div mTileSize do + if (gy >= gh) then break; + for gx := x div tsize to (x+w-1) div tsize do begin if (gx < 0) then continue; - if (gx >= mWidth) then break; - if (cb(gy*mWidth+gx)) then begin result := true; exit; end; + if (gx >= gw) then break; + result := cb(gy*gw+gx, bodyId); + if result then exit; end; end; end; -function TBodyGridBase.inserter (grida: Integer): Boolean; +// ////////////////////////////////////////////////////////////////////////// // +function TBodyGridBase.inserter (grida: Integer; bodyId: TBodyProxyId): Boolean; var cidx: Integer; - pc: PInteger; - {$IFDEF grid_use_buckets} + pc: Integer; pi: PGridCell; f: Integer; - {$ENDIF} begin result := false; // never stop // add body to the given grid cell - pc := @mGrid[grida]; - {$IFDEF grid_use_buckets} - if (pc^ <> -1) then + pc := mGrid[grida]; + if (pc <> -1) then begin - pi := @mCells[pc^]; + pi := @mCells[pc]; f := 0; for f := 0 to High(TGridCell.bodies) do begin if (pi.bodies[f] = -1) then begin // can add here - pi.bodies[f] := mUData; + pi.bodies[f] := bodyId; if (f+1 < Length(TGridCell.bodies)) then pi.bodies[f+1] := -1; exit; end; @@ -341,37 +613,27 @@ begin end; // either no room, or no cell at all cidx := allocCell(); - mCells[cidx].bodies[0] := mUData; + mCells[cidx].bodies[0] := bodyId; mCells[cidx].bodies[1] := -1; - mCells[cidx].next := pc^; - pc^ := cidx; - {$ELSE} - cidx := allocCell(); - //e_WriteLog(Format(' 01: allocated cell for grid coords (%d,%d), body coords:(%d,%d): #%d', [gx, gy, dx, dy, cidx]), MSG_NOTIFY); - mCells[cidx].body := mUData; - mCells[cidx].next := pc^; - pc^ := cidx; - {$ENDIF} + mCells[cidx].next := pc; + mGrid[grida] := cidx; end; - -procedure TBodyGridBase.insert (body: TBodyProxyId); +procedure TBodyGridBase.insertInternal (body: TBodyProxyId); var px: PBodyProxyRec; - oudata: Integer; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case px := @mProxies[body]; - oudata := mUData; - mUData := body; - forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, inserter); - mUData := oudata; + forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, inserter, body); end; -function TBodyGridBase.remover (grida: Integer): Boolean; +// absolutely not tested +function TBodyGridBase.remover (grida: Integer; bodyId: TBodyProxyId): Boolean; var - pidx, idx, tmp, f: Integer; + f: Integer; + pidx, idx, tmp: Integer; pc: PGridCell; begin result := false; // never stop @@ -381,12 +643,11 @@ begin while (idx >= 0) do begin tmp := mCells[idx].next; - {$IFDEF grid_use_buckets} pc := @mCells[idx]; f := 0; while (f < High(TGridCell.bodies)) do begin - if (pc.bodies[f] = mUData) then + if (pc.bodies[f] = bodyId) then begin // i found her! if (f = 0) and (pc.bodies[1] = -1) then @@ -412,127 +673,663 @@ begin end; Inc(f); end; - {$ELSE} - if (mCells[idx].body = mUData) then - begin - if (pidx = -1) then mGrid[grida] := tmp else mCells[pidx].next := tmp; - freeCell(idx); - exit; // assume that we cannot have one object added to bucket twice - end; - {$ENDIF} pidx := idx; idx := tmp; end; end; - // absolutely not tested -procedure TBodyGridBase.remove (body: TBodyProxyId); +procedure TBodyGridBase.removeInternal (body: TBodyProxyId); var px: PBodyProxyRec; - oudata: Integer; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case px := @mProxies[body]; - oudata := mUData; - mUData := body; - forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover); - mUData := oudata; + forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body); end; -function TBodyGridBase.insertBody (aObj: ITP; aX, aY, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxyId; +// ////////////////////////////////////////////////////////////////////////// // +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); - insert(result); + insertInternal(result); end; -procedure TBodyGridBase.removeBody (aObj: TBodyProxyId); +procedure TBodyGridBase.removeBody (body: TBodyProxyId); begin - if (aObj < 0) or (aObj > High(mProxies)) then exit; // just in case - remove(aObj); - freeProxy(aObj); + if (body < 0) or (body > High(mProxies)) then exit; // just in case + removeInternal(body); + freeProxy(body); end; +// ////////////////////////////////////////////////////////////////////////// // procedure TBodyGridBase.moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer); var px: PBodyProxyRec; + x0, y0, w, h: Integer; begin if (body < 0) or (body > High(mProxies)) then exit; // just in case - if ((dx = 0) and (dy = 0) and (sx = 0) and (sy = 0)) then exit; - remove(body); + if (dx = 0) and (dy = 0) and (sx = 0) and (sy = 0) then exit; px := @mProxies[body]; - Inc(px.mX, dx); - Inc(px.mY, dy); - Inc(px.mWidth, sx); - Inc(px.mHeight, sy); - insert(body); + x0 := px.mX; + y0 := px.mY; + w := px.mWidth; + h := px.mHeight; + // did any corner crossed tile boundary? + if (x0 div mTileSize <> (x0+dx) div mTileSize) or + (y0 div mTileSize <> (y0+dx) div mTileSize) or + ((x0+w) div mTileSize <> (x0+w+sx) div mTileSize) or + ((y0+h) div mTileSize <> (y0+h+sy) div mTileSize) then + begin + removeInternal(body); + Inc(px.mX, dx); + Inc(px.mY, dy); + Inc(px.mWidth, sx); + Inc(px.mHeight, sy); + insertInternal(body); + end + else + begin + Inc(px.mX, dx); + Inc(px.mY, dy); + Inc(px.mWidth, sx); + Inc(px.mHeight, sy); + end; end; procedure TBodyGridBase.moveBody (body: TBodyProxyId; dx, dy: Integer); +var + px: PBodyProxyRec; + nx, ny: Integer; begin - moveResizeBody(body, dx, dy, 0, 0); + if (body < 0) or (body > High(mProxies)) then exit; // just in case + if (dx = 0) and (dy = 0) then exit; + // check if tile coords was changed + px := @mProxies[body]; + nx := px.mX+dx; + ny := px.mY+dy; + if (nx div mTileSize <> px.mX div mTileSize) or (ny div mTileSize <> px.mY div mTileSize) then + begin + // crossed tile boundary, do heavy work + moveResizeBody(body, dx, dy, 0, 0); + end + else + begin + // nothing to do with the grid, just fix coordinates + px.mX := nx; + px.mY := ny; + end; end; procedure TBodyGridBase.resizeBody (body: TBodyProxyId; sx, sy: Integer); +var + px: PBodyProxyRec; + x0, y0: Integer; + nw, nh: Integer; begin - moveResizeBody(body, 0, 0, sx, sy); + if (body < 0) or (body > High(mProxies)) then exit; // just in case + if (sx = 0) and (sy = 0) then exit; + // check if tile coords was changed + px := @mProxies[body]; + x0 := px.mX; + y0 := px.mY; + nw := px.mWidth+sx; + nh := px.mHeight+sy; + if ((x0+px.mWidth) div mTileSize <> (x0+nw) div mTileSize) or + ((y0+px.mHeight) div mTileSize <> (y0+nh) div mTileSize) then + begin + // crossed tile boundary, do heavy work + moveResizeBody(body, 0, 0, sx, sy); + end + else + begin + // nothing to do with the grid, just fix size + px.mWidth := nw; + px.mHeight := nh; + end; end; -function TBodyGridBase.iterator (grida: Integer): Boolean; +// ////////////////////////////////////////////////////////////////////////// // +// no callback: return `true` on the first hit +function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): ITP; var - idx: Integer; - px: PBodyProxyRec; - {$IFDEF grid_use_buckets} - pi: PGridCell; f: Integer; - {$ENDIF} + idx, curci: Integer; + cc: PGridCell = nil; + px: PBodyProxyRec; + lq: LongWord; + ptag: Integer; begin - result := false; - idx := mGrid[grida]; - while (idx >= 0) do + result := Default(ITP); + tagmask := tagmask and TagFullMask; + if (tagmask = 0) then exit; + + // make coords (0,0)-based + Dec(x, mMinX); + Dec(y, mMinY); + if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then exit; + + curci := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)]; + // restore coords + Inc(x, mMinX); + Inc(y, mMinY); + + // increase query counter + Inc(mLastQuery); + if (mLastQuery = 0) then begin - {$IFDEF grid_use_buckets} - pi := @mCells[idx]; + // just in case of overflow + mLastQuery := 1; + for idx := 0 to High(mProxies) do mProxies[idx].mQueryMark := 0; + end; + lq := mLastQuery; + + while (curci <> -1) do + begin + cc := @mCells[curci]; for f := 0 to High(TGridCell.bodies) do begin - if (pi.bodies[f] = -1) then break; - px := @mProxies[pi.bodies[f]]; - if (px.mQueryMark <> mLastQuery) and ((mTagMask = -1) or ((px.mTag and mTagMask) <> 0)) then + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then begin - //e_WriteLog(Format(' query #%d body hit: (%d,%d)-(%dx%d) tag:%d', [mLastQuery, mCells[idx].body.mX, mCells[idx].body.mY, mCells[idx].body.mWidth, mCells[idx].body.mHeight, mCells[idx].body.mTag]), MSG_NOTIFY); - px.mQueryMark := mLastQuery; - if (mItCB(px.mObj, px.mTag)) then begin result := true; exit; end; + if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then + begin + px.mQueryMark := lq; + if assigned(cb) then + begin + if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; + end + else + begin + result := px.mObj; + exit; + end; + end; end; end; - idx := pi.next; - {$ELSE} - if (mCells[idx].body <> -1) then + 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; +const + tsize = mTileSize; +var + idx: Integer; + gx, gy: Integer; + curci: Integer; + f: Integer; + cc: PGridCell = nil; + px: PBodyProxyRec; + lq: LongWord; + gw: 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; + //tsize := mTileSize; + + if (x+w <= 0) or (y+h <= 0) then exit; + if (x >= gw*tsize) or (y >= mHeight*tsize) then exit; + + // 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 := 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 begin - px := @mProxies[mCells[idx].body]; - if (px.mQueryMark <> mLastQuery) and ((mTagMask = -1) or ((px.mTag and mTagMask) <> 0)) then + if (gx < 0) then continue; + if (gx >= gw) then break; + // process cells + curci := mGrid[gy*gw+gx]; + while (curci <> -1) do begin - //e_WriteLog(Format(' query #%d body hit: (%d,%d)-(%dx%d) tag:%d', [mLastQuery, mCells[idx].body.mX, mCells[idx].body.mY, mCells[idx].body.mWidth, mCells[idx].body.mHeight, mCells[idx].body.mTag]), MSG_NOTIFY); - px.mQueryMark := mLastQuery; - if (mItCB(px.mObj, px.mTag)) then begin result := true; exit; end; + 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 (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; + end; + curci := cc.next; end; end; - idx := mCells[idx].next; + end; +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; +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; +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; // as the first point is ignored, just get outta here + + 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 + 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; + + {$IF DEFINED(D2F_DEBUG)} + if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ > mHeight*tsize) then raise Exception.Create('raycaster internal error (0)'); + {$ENDIF} + + //if (dbgShowTraceLog) then e_WriteLog(Format('raycast start: (%d,%d)-(%d,%d); xptr^=%d; yptr^=%d', [ax0, ay0, ax1, ay1, xptr^, yptr^]), MSG_NOTIFY); + + // restore query coords + Inc(ax0, minx); + Inc(ay0, miny); + //Inc(ax1, minx); + //Inc(ay1, miny); + + // 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) + {$IF DEFINED(D2F_DEBUG)} + if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ > mHeight*tsize) then raise Exception.Create('raycaster internal error (0)'); {$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 + 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 + begin + cc := @mCells[curci]; + for f := 0 to High(TGridCell.bodies) do + begin + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + begin + // 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 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 + 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; + 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; + 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; end; -function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean; + +// ////////////////////////////////////////////////////////////////////////// // +//FIXME! optimize this with real tile walking +function TBodyGridBase.forEachAlongLine (x0, y0, x1, y1: Integer; cb: TGridAlongQueryCB; tagmask: Integer=-1): ITP; +const + tsize = mTileSize; var - idx: Integer; - otagmask: Integer; - ocb: TGridQueryCB; + i: Integer; + dx, dy, d: Integer; + xerr, yerr: Integer; + incx, incy: Integer; + stepx, stepy: Integer; + x, y: Integer; + maxx, maxy: Integer; + gw, gh: Integer; + ccidx: Integer; + curci: Integer; + cc: PGridCell; + px: PBodyProxyRec; + lq: LongWord; + minx, miny: Integer; + ptag: Integer; + lastWasInGrid: Boolean; + tbcross: Boolean; + f: Integer; begin - result := false; - if not assigned(cb) then exit; + result := Default(ITP); + tagmask := tagmask and TagFullMask; + if (tagmask = 0) then exit; + + minx := mMinX; + miny := mMinY; + + dx := x1-x0; + dy := y1-y0; + + if (dx > 0) then incx := 1 else if (dx < 0) then incx := -1 else incx := 0; + if (dy > 0) then incy := 1 else if (dy < 0) then incy := -1 else incy := 0; + + dx := abs(dx); + dy := abs(dy); + + if (dx > dy) then d := dx else d := dy; + + // `x` and `y` will be in grid coords + x := x0-minx; + y := y0-miny; // increase query counter Inc(mLastQuery); @@ -540,17 +1337,101 @@ begin begin // just in case of overflow mLastQuery := 1; - for idx := 0 to High(mProxies) do mProxies[idx].mQueryMark := 0; + for i := 0 to High(mProxies) do mProxies[i].mQueryMark := 0; end; - //e_WriteLog(Format('grid: query #%d: (%d,%d)-(%dx%d)', [mLastQuery, minx, miny, maxx, maxy]), MSG_NOTIFY); + lq := mLastQuery; - otagmask := mTagMask; - mTagMask := tagmask; - ocb := mItCB; - mItCB := cb; - result := forGridRect(x, y, w, h, iterator); - mTagMask := otagmask; - mItCB := ocb; + // cache various things + //tsize := mTileSize; + gw := mWidth; + gh := mHeight; + maxx := gw*tsize-1; + maxy := gh*tsize-1; + + // setup distance and flags + lastWasInGrid := (x >= 0) and (y >= 0) and (x <= maxx) and (y <= maxy); + + // setup starting tile ('cause we'll adjust tile vars only on tile edge crossing) + if lastWasInGrid then ccidx := mGrid[(y div tsize)*gw+(x div tsize)] else ccidx := -1; + + // it is slightly faster this way + xerr := -d; + yerr := -d; + + // now trace + for i := 1 to d do + begin + // do one step + xerr += dx; + yerr += dy; + // invariant: one of those always changed + {$IF DEFINED(D2F_DEBUG)} + if (xerr < 0) and (yerr < 0) then raise Exception.Create('internal bug in grid raycaster (0)'); + {$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)]; + end; + end + else + begin + // out of grid + if lastWasInGrid then exit; // oops, stepped out of the grid -- there is no way to return + end; + end; + + // has something to process in the current cell? + if (ccidx <> -1) then + begin + // process cell + curci := ccidx; + // convert coords to map (to avoid ajdusting coords inside the loop) + Inc(x, minx); + Inc(y, miny); + // process cell list + while (curci <> -1) do + begin + cc := @mCells[curci]; + for f := 0 to High(TGridCell.bodies) do + begin + if (cc.bodies[f] = -1) then break; + px := @mProxies[cc.bodies[f]]; + ptag := px.mTag; + if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then + begin + px.mQueryMark := lq; // mark as processed + if cb(px.mObj, ptag) then begin result := px.mObj; exit; end; + end; + end; + // next cell + curci := cc.next; + end; + ccidx := -1; // don't process this anymore + // convert coords to grid + Dec(x, minx); + Dec(y, miny); + end; + end; end;