diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas
index 81974570c4e201bd52d550e2b556fed261e8ffd6..661e341866708dcc7874ec9dedf7ad0721626d7f 100644 (file)
--- a/src/game/g_grid.pas
+++ b/src/game/g_grid.pas
interface
-const
- GridDefaultTileSize = 32;
- GridCellBucketSize = 8; // WARNING! can't be less than 2!
type
- TGridQueryCB = function (obj: TObject; tag: Integer): Boolean is nested; // return `true` to stop
+ TBodyProxyId = Integer;
-type
- TBodyGrid = class;
-
- TBodyProxy = Integer;
+ generic TBodyGridBase<ITP> = 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
- PBodyProxyRec = ^TBodyProxyRec;
- TBodyProxyRec = record
private
- mX, mY, mWidth, mHeight: Integer; // aabb
- mQueryMark: DWord; // was this object visited at this query?
- mObj: TObject;
- //mGrid: TBodyGrid;
- mTag: Integer;
- nextLink: TBodyProxy; // next free or nothing
+ const
+ GridDefaultTileSize = 32;
+ GridCellBucketSize = 8; // WARNING! can't be less than 2!
private
- procedure setup (aX, aY, aWidth, aHeight: Integer; aObj: TObject; aTag: Integer);
-
- public
- //constructor Create (aGrid: TBodyGrid; aX, aY, aWidth, aHeight: Integer; aObj: TObject; aTag: Integer);
- //destructor Destroy (); override;
-
- property x: Integer read mX;
- property y: Integer read mY;
- property width: Integer read mWidth;
- property height: Integer read mHeight;
- property obj: TObject read mObj;
- property tag: Integer read mTag;
- //property grid: TBodyGrid read mGrid;
- end;
+ type
+ PBodyProxyRec = ^TBodyProxyRec;
+ TBodyProxyRec = record
+ private
+ mX, mY, mWidth, mHeight: Integer; // aabb
+ mQueryMark: LongWord; // was this object visited at this query?
+ mObj: ITP;
+ mTag: Integer;
+ nextLink: TBodyProxyId; // next free or nothing
+
+ private
+ procedure setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer);
+ end;
- PGridCell = ^TGridCell;
- TGridCell = record
- {$IFDEF grid_use_buckets}
- bodies: array [0..GridCellBucketSize-1] of Integer; // -1: end of list
- {$ELSE}
- body: Integer;
- {$ENDIF}
- next: Integer; // in this cell; index in mCells
- end;
+ PGridCell = ^TGridCell;
+ TGridCell = record
+ {$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 is nested; // return `true` to stop
+ TGridInternalCB = function (grida: Integer): Boolean of object; // return `true` to stop
- TBodyGrid = class(TObject)
private
mTileSize: Integer;
mMinX, mMinY: Integer; // so grids can start at any origin
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: TBodyProxy; // free
+ mProxyFree: TBodyProxyId; // free
mProxyCount: Integer; // currently used
mProxyMaxCount: Integer;
+ mUData: TBodyProxyId; // for inserter/remover
+ mTagMask: Integer; // for iterator
+ mItCB: TGridQueryCB; // for iterator
+ mQueryInProcess: Boolean;
+
private
function allocCell: Integer;
procedure freeCell (idx: Integer); // `next` is simply overwritten
- function allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: TObject; aTag: Integer): TBodyProxy;
- procedure freeProxy (body: TBodyProxy);
+ function allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId;
+ procedure freeProxy (body: TBodyProxyId);
- procedure insert (body: TBodyProxy);
- procedure remove (body: TBodyProxy);
+ procedure insert (body: TBodyProxyId);
+ procedure remove (body: TBodyProxyId);
function forGridRect (x, y, w, h: Integer; cb: TGridInternalCB): Boolean;
+ function inserter (grida: Integer): Boolean;
+ function remover (grida: Integer): Boolean;
+ function iterator (grida: Integer): Boolean;
+
public
constructor Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer; aTileSize: Integer=GridDefaultTileSize);
destructor Destroy (); override;
- function insertBody (aObj: TObject; ax, ay, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxy;
- procedure removeBody (aObj: TBodyProxy); // WARNING! this WILL destroy proxy!
+ function insertBody (aObj: ITP; ax, ay, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxyId;
+ procedure removeBody (aObj: TBodyProxyId); // WARNING! this WILL destroy proxy!
- procedure moveBody (body: TBodyProxy; dx, dy: Integer);
- procedure resizeBody (body: TBodyProxy; sx, sy: Integer);
- procedure moveResizeBody (body: TBodyProxy; dx, dy, sx, sy: Integer);
+ procedure moveBody (body: TBodyProxyId; dx, dy: Integer);
+ procedure resizeBody (body: TBodyProxyId; sx, sy: Integer);
+ procedure moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer);
+ //WARNING: can't do recursive queries
function forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
- //function getProxyForBody (aObj: TObject; x, y, w, h: Integer): TBodyProxy;
+ //WARNING: can't do recursive queries
+ // cb with `(nil)` will be called before processing new tile
+ function traceRay (x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): Boolean; overload;
procedure dumpStats ();
end;
// ////////////////////////////////////////////////////////////////////////// //
-procedure TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: TObject; aTag: Integer);
+procedure TBodyGridBase.TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer);
begin
mX := aX;
mY := aY;
// ////////////////////////////////////////////////////////////////////////// //
-constructor TBodyGrid.Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer; aTileSize: Integer=GridDefaultTileSize);
+constructor TBodyGridBase.Create (aMinPixX, aMinPixY, aPixWidth, aPixHeight: Integer; aTileSize: Integer=GridDefaultTileSize);
var
idx: Integer;
begin
mProxyFree := 0;
mProxyCount := 0;
mProxyMaxCount := 0;
+ mUData := 0;
+ mTagMask := -1;
+ mItCB := nil;
+ mQueryInProcess := false;
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;
-destructor TBodyGrid.Destroy ();
+destructor TBodyGridBase.Destroy ();
begin
mCells := nil;
mGrid := nil;
end;
-procedure TBodyGrid.dumpStats ();
+procedure TBodyGridBase.dumpStats ();
var
idx, mcb, cidx, cnt: Integer;
begin
end;
-function TBodyGrid.allocCell: Integer;
+function TBodyGridBase.allocCell: Integer;
var
idx: Integer;
begin
end;
-procedure TBodyGrid.freeCell (idx: Integer);
+procedure TBodyGridBase.freeCell (idx: Integer);
begin
if (idx >= 0) and (idx < High(mCells)) then
begin
end;
-function TBodyGrid.allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: TObject; aTag: Integer): TBodyProxy;
+function TBodyGridBase.allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId;
var
olen, idx: Integer;
px: PBodyProxyRec;
if (mProxyMaxCount < mProxyCount) then mProxyMaxCount := mProxyCount;
end;
-procedure TBodyGrid.freeProxy (body: TBodyProxy);
+procedure TBodyGridBase.freeProxy (body: TBodyProxyId);
begin
if (body < 0) or (body > High(mProxies)) then exit; // just in case
if (mProxyCount = 0) then raise Exception.Create('wutafuuuuu in grid (no allocated proxies, what i should free now?)');
end;
-function TBodyGrid.forGridRect (x, y, w, h: Integer; cb: TGridInternalCB): Boolean;
+function TBodyGridBase.forGridRect (x, y, w, h: Integer; cb: TGridInternalCB): Boolean;
var
gx, gy: Integer;
begin
end;
-procedure TBodyGrid.insert (body: TBodyProxy);
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.traceRay (x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): Boolean;
+var
+ i: Integer;
+ dx, dy: Integer;
+ xerr, yerr, d: LongWord;
+ incx, incy: Integer;
+ x, y: Integer;
+ maxx, maxy: Integer;
+ tsize: Integer; // tile size
+ gw, gh: Integer;
+ lastGA: Integer = -1;
+ ga: Integer = -1; // last used grid address
+ ccidx: Integer = -1;
+ curci: Integer = -1;
+ cc: PGridCell = nil;
+ hasUntried: Boolean;
+ f: Integer;
+ px: PBodyProxyRec;
+ lq: LongWord;
+ prevX, prevY: Integer;
+ minx, miny: Integer;
+begin
+ result := False;
- function inserter (grida: Integer): Boolean;
- var
- cidx: Integer;
- pc: PInteger;
- {$IFDEF grid_use_buckets}
- pi: PGridCell;
- f: Integer;
- {$ENDIF}
+ if (tagmask = 0) then exit;
+
+ // make coords (0,0)-based
+ minx := mMinX;
+ miny := mMinY;
+ Dec(x0, minx);
+ Dec(y0, miny);
+ Dec(x1, minx);
+ Dec(y1, miny);
+
+ xerr := 0;
+ yerr := 0;
+ 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 := x0;
+ y := y0;
+
+ // increase query counter
+ Inc(mLastQuery);
+ if (mLastQuery = 0) then
begin
- result := false; // never stop
- // add body to the given grid cell
- pc := @mGrid[grida];
- {$IFDEF grid_use_buckets}
- if (pc^ <> -1) then
+ // just in case of overflow
+ mLastQuery := 1;
+ for i := 0 to High(mProxies) do mProxies[i].mQueryMark := 0;
+ end;
+ lq := mLastQuery;
+
+ tsize := mTileSize;
+ gw := mWidth;
+ gh := mHeight;
+ maxx := gw*tsize-1;
+ maxy := gh*tsize-1;
+
+ for i := 1 to d do
+ begin
+ prevX := x;
+ prevY := y;
+ Inc(xerr, dx); if (xerr > d) then begin Dec(xerr, d); Inc(x, incx); end;
+ Inc(yerr, dy); if (yerr > d) then begin Dec(yerr, d); Inc(y, incy); end;
+
+ if (x >= 0) and (y >= 0) and (x <= maxx) and (y <= maxy) then
begin
- pi := @mCells[pc^];
- f := 0;
- for f := 0 to High(TGridCell.bodies) do
+ ga := (y div tsize)*gw+(x div tsize);
+ if (lastGA <> ga) then
begin
- if (pi.bodies[f] = -1) then
+ // new cell
+ lastGA := ga;
+ ccidx := mGrid[lastGA];
+ if (ccidx <> -1) then
begin
- // can add here
- pi.bodies[f] := body;
- if (f+1 < Length(TGridCell.bodies)) then pi.bodies[f+1] := -1;
- exit;
+ result := cb(nil, 0, x+minx, y+miny, prevX+minx, prevY+miny);
+ if result then exit;
end;
end;
+ end
+ else
+ begin
+ ccidx := -1;
+ end;
+
+ if (ccidx <> -1) then
+ begin
+ curci := ccidx;
+ hasUntried := false;
+ while (curci <> -1) do
+ begin
+ cc := @mCells[curci];
+ for f := 0 to High(TGridCell.bodies) do
+ begin
+ if (cc.bodies[f] = -1) then break;
+ px := @mProxies[cc.bodies[f]];
+ if (px.mQueryMark <> lq) and ((px.mTag and tagmask) <> 0) then
+ begin
+ if (x+minx >= px.mX) and (y+miny >= px.mY) and (x+minx < px.mX+px.mWidth) and (y+miny < px.mY+px.mHeight) then
+ begin
+ px.mQueryMark := lq;
+ result := cb(px.mObj, px.mTag, x+minx, y+miny, prevX+minx, prevY+miny);
+ if result then exit;
+ end
+ else
+ begin
+ hasUntried := true;
+ end;
+ end;
+ end;
+ curci := cc.next;
+ end;
+ if not hasUntried then ccidx := -1; // don't process this cell anymore
end;
- // either no room, or no cell at all
- cidx := allocCell();
- mCells[cidx].bodies[0] := body;
- mCells[cidx].bodies[1] := -1;
- mCells[cidx].next := pc^;
- pc^ := cidx;
- {$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 := body;
- mCells[cidx].next := pc^;
- pc^ := cidx;
- {$ENDIF}
end;
+end;
+
+function TBodyGridBase.inserter (grida: Integer): Boolean;
+var
+ cidx: Integer;
+ pc: PInteger;
+ {$IFDEF grid_use_buckets}
+ 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
+ begin
+ 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;
+ if (f+1 < Length(TGridCell.bodies)) then pi.bodies[f+1] := -1;
+ exit;
+ end;
+ end;
+ end;
+ // either no room, or no cell at all
+ cidx := allocCell();
+ mCells[cidx].bodies[0] := mUData;
+ 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}
+end;
+
+
+procedure TBodyGridBase.insert (body: TBodyProxyId);
var
px: PBodyProxyRec;
begin
if (body < 0) or (body > High(mProxies)) then exit; // just in case
px := @mProxies[body];
+ mUData := body;
forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, inserter);
end;
-// absolutely not tested
-procedure TBodyGrid.remove (body: TBodyProxy);
-
-(*
- function remover (grida: Integer): Boolean;
- var
- pidx, idx, tmp: Integer;
+function TBodyGridBase.remover (grida: Integer): Boolean;
+var
+ pidx, idx, tmp, f: Integer;
+ pc: PGridCell;
+begin
+ result := false; // never stop
+ // find and remove cell
+ pidx := -1;
+ idx := mGrid[grida];
+ while (idx >= 0) do
begin
- result := false; // never stop
- // find and remove cell
- pidx := -1;
- idx := mGrid[grida];
- while idx >= 0 do
+ tmp := mCells[idx].next;
+ {$IFDEF grid_use_buckets}
+ pc := @mCells[idx];
+ f := 0;
+ while (f < High(TGridCell.bodies)) do
begin
- tmp := mCells[idx].next;
- if (mCells[idx].body = body) then
- begin
- if (pidx = -1) then mGrid[grida] := tmp else mCells[pidx].next := tmp;
- freeCell(idx);
- break; // assume that we cannot have one object added to bucket twice
- end
- else
+ if (pc.bodies[f] = mUData) then
begin
- pidx := idx;
+ // i found her!
+ if (f = 0) and (pc.bodies[1] = -1) then
+ begin
+ // this cell contains no elements, remove it
+ tmp := mCells[idx].next;
+ if (pidx = -1) then mGrid[grida] := tmp else mCells[pidx].next := tmp;
+ freeCell(idx);
+ end
+ else
+ begin
+ // remove element from bucket
+ Inc(f);
+ while (f < High(TGridCell.bodies)) do
+ begin
+ pc.bodies[f-1] := pc.bodies[f];
+ if (pc.bodies[f] = -1) then break;
+ Inc(f);
+ end;
+ pc.bodies[High(TGridCell.bodies)] := -1; // just in case
+ end;
+ exit; // assume that we cannot have one object added to bucket twice
end;
- idx := tmp;
+ Inc(f);
end;
+ {$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);
var
px: PBodyProxyRec;
-*)
begin
-(*
if (body < 0) or (body > High(mProxies)) then exit; // just in case
px := @mProxies[body];
+ mUData := body;
forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover);
-*)
- raise Exception.Create('TBodyGrid.remove: not yet, sorry');
end;
-function TBodyGrid.insertBody (aObj: TObject; aX, aY, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxy;
+function TBodyGridBase.insertBody (aObj: ITP; aX, aY, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxyId;
begin
+ if mQueryInProcess then raise Exception.Create('grid doesn''t support recursive queries');
+ mQueryInProcess := true;
result := allocProxy(aX, aY, aWidth, aHeight, aObj, aTag);
insert(result);
+ mQueryInProcess := false;
end;
-procedure TBodyGrid.removeBody (aObj: TBodyProxy);
+procedure TBodyGridBase.removeBody (aObj: TBodyProxyId);
begin
if (aObj < 0) or (aObj > High(mProxies)) then exit; // just in case
- removeBody(aObj);
+ if mQueryInProcess then raise Exception.Create('grid doesn''t support recursive queries');
+ mQueryInProcess := true;
+ remove(aObj);
freeProxy(aObj);
+ mQueryInProcess := false;
end;
-procedure TBodyGrid.moveResizeBody (body: TBodyProxy; dx, dy, sx, sy: Integer);
+procedure TBodyGridBase.moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer);
var
px: PBodyProxyRec;
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;
+ if mQueryInProcess then raise Exception.Create('grid doesn''t support recursive queries');
+ mQueryInProcess := true;
remove(body);
px := @mProxies[body];
Inc(px.mX, dx);
Inc(px.mWidth, sx);
Inc(px.mHeight, sy);
insert(body);
+ mQueryInProcess := false;
end;
-procedure TBodyGrid.moveBody (body: TBodyProxy; dx, dy: Integer);
+procedure TBodyGridBase.moveBody (body: TBodyProxyId; dx, dy: Integer);
begin
moveResizeBody(body, dx, dy, 0, 0);
end;
-procedure TBodyGrid.resizeBody (body: TBodyProxy; sx, sy: Integer);
+procedure TBodyGridBase.resizeBody (body: TBodyProxyId; sx, sy: Integer);
begin
moveResizeBody(body, 0, 0, sx, sy);
end;
-function TBodyGrid.forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
- function iterator (grida: Integer): Boolean;
- var
- idx: Integer;
- px: PBodyProxyRec;
- {$IFDEF grid_use_buckets}
- pi: PGridCell;
- f: Integer;
- {$ENDIF}
+function TBodyGridBase.iterator (grida: Integer): Boolean;
+var
+ idx: Integer;
+ px: PBodyProxyRec;
+ {$IFDEF grid_use_buckets}
+ pi: PGridCell;
+ f: Integer;
+ {$ENDIF}
+begin
+ result := false;
+ idx := mGrid[grida];
+ while (idx >= 0) do
begin
- result := false;
- idx := mGrid[grida];
- while (idx >= 0) do
+ {$IFDEF grid_use_buckets}
+ pi := @mCells[idx];
+ for f := 0 to High(TGridCell.bodies) do
begin
- {$IFDEF grid_use_buckets}
- pi := @mCells[idx];
- for f := 0 to High(TGridCell.bodies) do
+ if (pi.bodies[f] = -1) then break;
+ px := @mProxies[pi.bodies[f]];
+ if (px.mQueryMark <> mLastQuery) and ((mTagMask = -1) or ((px.mTag and mTagMask) <> 0)) then
begin
- if (pi.bodies[f] = -1) then break;
- px := @mProxies[pi.bodies[f]];
- if (px.mQueryMark <> mLastQuery) and ((px.mTag and tagmask) <> 0) then
- begin
- //e_WriteLog(Format(' query #%d body hit: (%d,%d)-(%dx%d) tag:%d', [mLastQuery, mCells[idx].body.mX, mCells[idx].body.mY, mCells[idx].body.mWidth, mCells[idx].body.mHeight, mCells[idx].body.mTag]), MSG_NOTIFY);
- px.mQueryMark := mLastQuery;
- if (cb(px.mObj, px.mTag)) then begin result := true; exit; end;
- end;
+ //e_WriteLog(Format(' query #%d body hit: (%d,%d)-(%dx%d) tag:%d', [mLastQuery, mCells[idx].body.mX, mCells[idx].body.mY, mCells[idx].body.mWidth, mCells[idx].body.mHeight, mCells[idx].body.mTag]), MSG_NOTIFY);
+ px.mQueryMark := mLastQuery;
+ if (mItCB(px.mObj, px.mTag)) then begin result := true; exit; end;
end;
- idx := pi.next;
- {$ELSE}
- if (mCells[idx].body <> -1) then
+ end;
+ idx := pi.next;
+ {$ELSE}
+ if (mCells[idx].body <> -1) then
+ begin
+ px := @mProxies[mCells[idx].body];
+ if (px.mQueryMark <> mLastQuery) and ((mTagMask = -1) or ((px.mTag and mTagMask) <> 0)) then
begin
- px := @mProxies[mCells[idx].body];
- if (px.mQueryMark <> mLastQuery) and ((px.mTag and tagmask) <> 0) then
- begin
- //e_WriteLog(Format(' query #%d body hit: (%d,%d)-(%dx%d) tag:%d', [mLastQuery, mCells[idx].body.mX, mCells[idx].body.mY, mCells[idx].body.mWidth, mCells[idx].body.mHeight, mCells[idx].body.mTag]), MSG_NOTIFY);
- px.mQueryMark := mLastQuery;
- if (cb(px.mObj, px.mTag)) then begin result := true; exit; end;
- end;
+ //e_WriteLog(Format(' query #%d body hit: (%d,%d)-(%dx%d) tag:%d', [mLastQuery, mCells[idx].body.mX, mCells[idx].body.mY, mCells[idx].body.mWidth, mCells[idx].body.mHeight, mCells[idx].body.mTag]), MSG_NOTIFY);
+ px.mQueryMark := mLastQuery;
+ if (mItCB(px.mObj, px.mTag)) then begin result := true; exit; end;
end;
- idx := mCells[idx].next;
- {$ENDIF}
end;
+ idx := mCells[idx].next;
+ {$ENDIF}
end;
+end;
+function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
var
idx: Integer;
begin
result := false;
if not assigned(cb) then exit;
+ if mQueryInProcess then raise Exception.Create('grid doesn''t support recursive queries');
+ mQueryInProcess := true;
+
// increase query counter
Inc(mLastQuery);
if (mLastQuery = 0) then
end;
//e_WriteLog(Format('grid: query #%d: (%d,%d)-(%dx%d)', [mLastQuery, minx, miny, maxx, maxy]), MSG_NOTIFY);
+ mTagMask := tagmask;
+ mItCB := cb;
result := forGridRect(x, y, w, h, iterator);
+ mQueryInProcess := false;
end;
-(*
-function TBodyGrid.getProxyForBody (aObj: TObject; x, y, w, h: Integer): TBodyProxy;
-var
- res: TBodyProxy = -1;
-
- function iterator (grida: Integer): Boolean;
- var
- idx: Integer;
- begin
- result := false;
- idx := mGrid[grida];
- while idx >= 0 do
- begin
- if (mCells[idx].body <> -1) and (mProxies[mCells[idx].body].mObj = aObj) then
- begin
- result := true;
- res := mCells[idx].body;
- exit;
- end;
- idx := mCells[idx].next;
- end;
- end;
-
-begin
- result := -1;
- if (aObj = nil) then exit;
- forGridRect(x, y, w, h, iterator);
- result := res;
-end;
-*)
-
-
end.