diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas
index 13c57c98500101653d346c82599259cb5fa1d120..2dfb0ce43d4ff6cb49dece8b05fe3737ca7221b5 100644 (file)
--- a/src/game/g_grid.pas
+++ b/src/game/g_grid.pas
-(* Copyright (C) DooM 2D:Forever Developers
+(* Copyright (C) Doom 2D: Forever Developers
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
+ * the Free Software Foundation, version 3 of the License ONLY.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
*)
// universal spatial grid
{$INCLUDE ../shared/a_modes.inc}
+{$IF DEFINED(D2F_DEBUG)}
+ {.$DEFINE D2F_DEBUG_RAYTRACE}
+ {.$DEFINE D2F_DEBUG_XXQ}
+ {.$DEFINE D2F_DEBUG_MOVER}
+{$ENDIF}
+{.$DEFINE GRID_USE_ORTHO_ACCEL}
+{$DEFINE LINEAABB2}
unit g_grid;
interface
+uses
+ mempool;
+
+(*
+ * In order to make this usable for kind-of-recursive calls,
+ * we'll use "frame memory pool" to return results. That is,
+ * we will allocate a memory pool that will be cleared on
+ * frame start, and then used as a simple "no-free" allocator.
+ * Grid will put results into this pool, and will never bother
+ * to free it. Caller should call "release" on result, and
+ * the pool will throw away everything.
+ * No more callbacks, of course.
+ *)
+
+const
+ GridTileSize = 32; // must be power of two!
+
+type
+ PGridCellCoord = ^TGridCellCoord;
+ TGridCellCoord = record
+ x, y: Integer;
+ end;
+
+ CellCoordIter = specialize PoolIter<TGridCellCoord>;
+
type
TBodyProxyId = Integer;
- generic TBodyGridBase<ITP> = class(TObject)
+ generic TBodyGridBase<ITP> = class{$IFDEF USE_MEMPOOL}(TPoolObject){$ENDIF}
public
- type TGridQueryCB = function (obj: ITP; tag: Integer): Boolean is nested; // return `true` to stop
- type TGridRayQueryCB = function (obj: ITP; tag: Integer; x, y, prevx, prevy: Integer): Boolean is nested; // return `true` to stop
+ type PITP = ^ITP;
+ type TCellQueryCB = procedure (x, y: Integer) is nested; // top-left cell corner coords
+
+ type Iter = specialize PoolIter<ITP>;
const TagDisabled = $40000000;
+ const TagFullMask = $3fffffff;
private
const
- GridDefaultTileSize = 32;
GridCellBucketSize = 8; // WARNING! can't be less than 2!
- private
+ public
type
PBodyProxyRec = ^TBodyProxyRec;
TBodyProxyRec = record
mX, mY, mWidth, mHeight: Integer; // aabb
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
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;
- TGridInternalCB = function (grida: Integer): Boolean of object; // return `true` to stop
+ TCellArray = array of TGridCell;
+
+ TGridInternalCB = function (grida: Integer; bodyId: TBodyProxyId): Boolean of object; // return `true` to stop
+
+ private
+ //mTileSize: Integer;
+ 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
- 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
+ mCells: TCellArray; // cell pool
mFreeCell: Integer; // first free cell index or -1
mLastQuery: LongWord;
mUsedCells: Integer;
mProxyCount: Integer; // currently used
mProxyMaxCount: Integer;
- mUData: TBodyProxyId; // for inserter/remover
- mTagMask: Integer; // for iterator
- mItCB: TGridQueryCB; // for iterator
+ public
+ dbgShowTraceLog: Boolean;
+ {$IF DEFINED(D2F_DEBUG)}
+ dbgRayTraceTileHitCB: TCellQueryCB;
+ {$ENDIF}
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);
+ 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): Boolean;
- function remover (grida: Integer): Boolean;
+ function inserter (grida: Integer; bodyId: TBodyProxyId): Boolean;
+ function remover (grida: Integer; bodyId: TBodyProxyId): Boolean;
function getProxyEnabled (pid: TBodyProxyId): Boolean; inline;
procedure setProxyEnabled (pid: TBodyProxyId; val: Boolean); inline;
+ 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);
+ 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);
+ procedure moveBody (body: TBodyProxyId; nx, ny: Integer);
+ procedure resizeBody (body: TBodyProxyId; nw, nh: Integer);
+ procedure moveResizeBody (body: TBodyProxyId; nx, ny, nw, nh: Integer);
function insideGrid (x, y: Integer): Boolean; inline;
- //WARNING: can't do recursive queries
- // no callback: return `true` on the first hit
- function forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
+ // `false` if `body` is surely invalid
+ function getBodyXY (body: TBodyProxyId; out rx, ry: Integer): Boolean; inline;
+ function getBodyWH (body: TBodyProxyId; out rw, rh: Integer): Boolean; inline;
+ function getBodyDims (body: TBodyProxyId; out rx, ry, rw, rh: Integer): Boolean; inline;
+
+ // return number of ITP thingys put into frame pool
+ // if `firstHit` is `true`, return on first hit (obviously)
+ function forEachInAABB (x, y, w, h: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter;
- //WARNING: can't do recursive queries
- // no callback: return `true` on the first hit
- function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
+ // return number of ITP thingys put into frame pool
+ // if `firstHit` is `true`, return on first hit (obviously)
+ function forEachAtPoint (x, y: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter;
- //WARNING: can't do recursive queries
- // 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): Boolean; overload;
- function traceRay (out ex, ey: Integer; x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): Boolean;
+ function atCellInPoint (x, y: Integer): TAtPointEnumerator;
+ // return object of the nearest hit or nil
+ function traceRay (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; overload;
+ function traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): ITP;
+
+ // return `false` if we're still inside at the end
+ // line should be either strict horizontal, or strict vertical, otherwise an exception will be thrown
+ // `true`: endpoint will point at the last "inside" pixel
+ // `false`: endpoint will be (ax1, ay1)
+ function traceOrthoRayWhileIn (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): Boolean;
+
+ // trace line along the grid, put all objects from passed cells into frame pool, in no particular order
+ // return number of ITP thingys put into frame pool
+ function forEachAlongLine (ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1; log: Boolean=false): Iter;
+
+ // trace box with the given velocity; return object hit (if any)
+ // `cb` is used unconvetionally here: if it returns `false`, tracer will ignore the object
+ //WARNING: don't change tags in callbacks here!
+ function traceBox (out ex, ey: Integer; const ax0, ay0, aw, ah: Integer; const dx, dy: Integer; tagmask: Integer=-1): ITP;
+
+ // debug
+ function forEachBodyCell (body: TBodyProxyId): CellCoordIter; // this puts `TGridCellCoord` into frame pool for each cell
+ function forEachInCell (x, y: Integer): Iter; // this puts `ITP` into frame pool
procedure dumpStats ();
+ public
//WARNING! no sanity checks!
property proxyEnabled[pid: TBodyProxyId]: Boolean read getProxyEnabled write setProxyEnabled;
+
+ property gridX0: Integer read mMinX;
+ 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
+ stleft: Integer; // "steps left"
+ err, errinc, errmax: Integer;
+ xd, yd: Integer; // current coord
+ horiz: Boolean;
+
+ public
+ // call `setyp` after this
+ constructor Create (minx, miny, maxx, maxy: Integer);
+
+ procedure setClip (minx, miny, maxx, maxy: Integer); inline;
+
+ // this will use `w[xy][01]` to clip coords
+ // return `false` if the whole line was clipped away
+ // on `true`, you should process first point, and go on
+ function setup (x0, y0, x1, y1: Integer): Boolean;
+
+ // call this *after* doing a step
+ // WARNING! if you will do a step when this returns `true`, you will fall into limbo
+ function done (): Boolean; inline;
+
+ // as you will prolly call `done()` after doing a step anyway, this will do it for you
+ // move to next point, return `true` when the line is complete (i.e. you should stop)
+ function step (): Boolean; inline;
+
+ // move to next tile; return `true` if the line is complete (and walker state is undefined then)
+ function stepToNextTile (): Boolean; inline;
+
+ procedure getXY (out ox, oy: Integer); inline;
+
+ public
+ // current coords
+ property x: Integer read xd;
+ property y: Integer read yd;
end;
+procedure swapInt (var a: Integer; var b: Integer); inline;
+//function minInt (a, b: Integer): Integer; inline;
+//function maxInt (a, b: Integer): Integer; inline;
+
+
implementation
uses
- SysUtils, e_log;
+ SysUtils, e_log, g_console, geom, utils;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+procedure swapInt (var a: Integer; var b: Integer); inline; var t: Integer; begin t := a; a := b; b := t; end;
+//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;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+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.setup (x0, y0, x1, y1: Integer): Boolean;
+var
+ sx0, sy0, sx1, sy1: Single;
+begin
+ if (wx1 < wx0) or (wy1 < wy0) then begin stleft := 0; xd := x0; yd := y0; result := false; exit; end;
+
+ if (x0 >= wx0) and (y0 >= wy0) and (x0 <= wx1) and (y0 <= wy1) and
+ (x1 >= wx0) and (y1 >= wy0) and (x1 <= wx1) and (y1 <= wy1) then
+ begin
+ result := true;
+ end
+ else
+ begin
+ sx0 := x0; sy0 := y0;
+ sx1 := x1; sy1 := y1;
+ result := clipLine(sx0, sy0, sx1, sy1, wx0, wy0, wx1, wy1);
+ if not result then begin stleft := 0; xd := x0; yd := y0; exit; end;
+ x0 := trunc(sx0); y0 := trunc(sy0);
+ x1 := trunc(sx1); y1 := trunc(sy1);
+ end;
+
+ // check for ortho lines
+ if (y0 = y1) then
+ begin
+ // horizontal
+ horiz := true;
+ stleft := abs(x1-x0)+1;
+ if (x0 < x1) then stx := 1 else stx := -1;
+ sty := 0;
+ errinc := 0;
+ errmax := 10; // anything that is greater than zero
+ end
+ else if (x0 = x1) then
+ begin
+ // vertical
+ horiz := false;
+ stleft := abs(y1-y0)+1;
+ stx := 0;
+ if (y0 < y1) then sty := 1 else sty := -1;
+ errinc := 0;
+ errmax := 10; // anything that is greater than zero
+ end
+ else
+ begin
+ // diagonal
+ if (abs(x1-x0) >= abs(y1-y0)) then
+ begin
+ // horizontal
+ horiz := true;
+ stleft := abs(x1-x0)+1;
+ errinc := abs(y1-y0)+1;
+ end
+ else
+ begin
+ // vertical
+ horiz := false;
+ stleft := abs(y1-y0)+1;
+ errinc := abs(x1-x0)+1;
+ end;
+ if (x0 < x1) then stx := 1 else stx := -1;
+ if (y0 < y1) then sty := 1 else sty := -1;
+ errmax := stleft;
+ end;
+ xd := x0;
+ yd := y0;
+ err := -errmax;
+end;
+
+function TLineWalker.done (): Boolean; inline; begin result := (stleft <= 0); end;
+
+// true: done
+function TLineWalker.step (): Boolean; inline;
+begin
+ if horiz then
+ begin
+ xd += stx;
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; yd += sty; end;
+ end
+ else
+ begin
+ yd += sty;
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; xd += stx; end;
+ end;
+ Dec(stleft);
+ result := (stleft <= 0);
+end;
+
+// true: done
+function TLineWalker.stepToNextTile (): Boolean; inline;
+var
+ ex, ey: Integer;
+ xwalk, ywalk, wklen: Integer; // to the respective edges
+ f: Integer;
+begin
+ result := false;
+
+ if (stleft < 2) then begin result := true; exit; end; // max one pixel left, nothing to do
+
+ // strictly horizontal?
+ if (sty = 0) then
+ begin
+ // only xd
+ if (stx < 0) then
+ begin
+ // xd: to left edge
+ ex := (xd and (not (TileSize-1)))-1;
+ stleft -= xd-ex;
+ end
+ else
+ begin
+ // xd: to right edge
+ ex := (xd or (TileSize-1))+1;
+ stleft -= ex-xd;
+ end;
+ result := (stleft <= 0);
+ xd := ex;
+ exit;
+ end;
+
+ // strictly vertical?
+ if (stx = 0) then
+ begin
+ // only xd
+ if (sty < 0) then
+ begin
+ // yd: to top edge
+ ey := (yd and (not (TileSize-1)))-1;
+ stleft -= yd-ey;
+ end
+ else
+ begin
+ // yd: to bottom edge
+ ey := (yd or (TileSize-1))+1;
+ stleft -= ey-yd;
+ end;
+ result := (stleft <= 0);
+ yd := ey;
+ exit;
+ end;
+
+ // diagonal
+
+ // calculate xwalk
+ if (stx < 0) then
+ begin
+ ex := (xd and (not (TileSize-1)))-1;
+ xwalk := xd-ex;
+ end
+ else
+ begin
+ ex := (xd or (TileSize-1))+1;
+ xwalk := ex-xd;
+ end;
+
+ // calculate ywalk
+ if (sty < 0) then
+ begin
+ ey := (yd and (not (TileSize-1)))-1;
+ ywalk := yd-ey;
+ end
+ else
+ begin
+ ey := (yd or (TileSize-1))+1;
+ ywalk := ey-yd;
+ end;
+
+ {
+ while (xd <> ex) and (yd <> ey) do
+ begin
+ if horiz then
+ begin
+ xd += stx;
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; yd += sty; end;
+ end
+ else
+ begin
+ yd += sty;
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; xd += stx; end;
+ end;
+ Dec(stleft);
+ if (stleft < 1) then begin result := true; exit; end;
+ end;
+ }
+
+ if (xwalk <= ywalk) then wklen := xwalk else wklen := ywalk;
+ while true do
+ begin
+ // in which dir we want to walk?
+ stleft -= wklen;
+ if (stleft <= 0) then begin result := true; exit; end;
+ if horiz then
+ begin
+ xd += wklen*stx;
+ for f := 1 to wklen do
+ begin
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; yd += sty; end;
+ end;
+ end
+ else
+ begin
+ yd += wklen*sty;
+ for f := 1 to wklen do
+ begin
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; xd += stx; end;
+ end;
+ end;
+ // check for walk completion
+ if (xd = ex) or (yd = ey) then exit;
+ wklen := 1;
+ end;
+end;
+
+procedure TLineWalker.getXY (out ox, oy: Integer); inline; begin ox := xd; oy := yd; end;
// ////////////////////////////////////////////////////////////////////////// //
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);
+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
- 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);
for idx := 0 to High(mCells) do
begin
mCells[idx].bodies[0] := -1;
+ mCells[idx].bodies[GridCellBucketSize-1] := -1; // "has free room" flag
mCells[idx].next := idx+1;
end;
mCells[High(mCells)].next := -1; // last cell
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);
+ e_WriteLog(Format('created grid with size: %dx%d (tile size: %d); pix: %dx%d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize]), TMsgType.Notify);
end;
end;
+// ////////////////////////////////////////////////////////////////////////// //
procedure TBodyGridBase.dumpStats ();
var
- idx, mcb, cidx, cnt: Integer;
+ idx, mcb, ccidx, cnt: Integer;
begin
mcb := 0;
for idx := 0 to High(mGrid) do
begin
- cidx := mGrid[idx];
+ ccidx := mGrid[idx];
cnt := 0;
- while cidx >= 0 do
+ while ccidx >= 0 do
begin
Inc(cnt);
- cidx := mCells[cidx].next;
+ ccidx := mCells[ccidx].next;
end;
if (mcb < cnt) then mcb := cnt;
end;
- e_WriteLog(Format('grid size: %dx%d (tile size: %d); pix: %dx%d; used cells: %d; max bodies in cell: %d; max proxies allocated: %d; proxies used: %d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize, mUsedCells, mcb, mProxyMaxCount, mProxyCount]), MSG_NOTIFY);
+ e_WriteLog(Format('grid size: %dx%d (tile size: %d); pix: %dx%d; used cells: %d; max bodies in cell: %d; max proxies allocated: %d; proxies used: %d', [mWidth, mHeight, mTileSize, mWidth*mTileSize, mHeight*mTileSize, mUsedCells, mcb, mProxyMaxCount, mProxyCount]), TMsgType.Notify);
+end;
+
+
+function TBodyGridBase.forEachBodyCell (body: TBodyProxyId): CellCoordIter;
+var
+ g, f, ccidx: Integer;
+ cc: PGridCell;
+ presobj: PGridCellCoord;
+begin
+ result := CellCoordIter.Create(framePool);
+ if (body < 0) or (body > High(mProxies)) then begin result.finishIt(); exit; end;
+ for g := 0 to High(mGrid) do
+ begin
+ ccidx := mGrid[g];
+ while (ccidx <> -1) do
+ begin
+ cc := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
+ begin
+ if (cc.bodies[f] = -1) then break;
+ if (cc.bodies[f] = body) then
+ begin
+ presobj := PGridCellCoord(framePool.alloc(sizeof(TGridCellCoord)));
+ presobj^.x := (g mod mWidth)*mTileSize+mMinX;
+ presobj^.y := (g div mWidth)*mTileSize+mMinY;
+ //cb((g mod mWidth)*mTileSize+mMinX, (g div mWidth)*mTileSize+mMinY);
+ end;
+ end;
+ // next cell
+ ccidx := cc.next;
+ end;
+ end;
+ result.finishIt();
+end;
+
+
+function TBodyGridBase.forEachInCell (x, y: Integer): Iter;
+var
+ f, ccidx: Integer;
+ cc: PGridCell;
+ presobj: PITP;
+begin
+ result := Iter.Create(framePool);
+ Dec(x, mMinX);
+ Dec(y, mMinY);
+ if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y > mHeight*mTileSize) then begin result.finishIt(); exit; end;
+ ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
+ while (ccidx <> -1) do
+ begin
+ cc := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
+ begin
+ if (cc.bodies[f] = -1) then break;
+ //if cb(mProxies[cc.bodies[f]].mObj, mProxies[cc.bodies[f]].mTag) then begin result := mProxies[cc.bodies[f]].mObj; exit; end;
+ presobj := PITP(framePool.alloc(sizeof(ITP)));
+ //presobj^ := mProxies[cc.bodies[f]].mObj;
+ Move(mProxies[cc.bodies[f]].mObj, presobj^, sizeof(ITP));
+ end;
+ // next cell
+ ccidx := cc.next;
+ end;
+ result.finishIt();
end;
+// ////////////////////////////////////////////////////////////////////////// //
+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
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.getBodyWH (body: TBodyProxyId; out rw, rh: Integer): Boolean; inline;
+begin
+ if (body >= 0) and (body < Length(mProxies)) then
+ begin
+ with mProxies[body] do begin rw := mWidth; rh := mHeight; end;
+ result := true;
+ end
+ else
+ begin
+ rw := 0;
+ rh := 0;
+ result := false;
+ end;
+end;
+
+
+function TBodyGridBase.getBodyDims (body: TBodyProxyId; out rx, ry, rw, rh: Integer): Boolean; inline;
+begin
+ if (body >= 0) and (body < Length(mProxies)) then
+ begin
+ with mProxies[body] do begin rx := mX; ry := mY; rw := mWidth; rh := mHeight; end;
+ result := true;
+ end
+ else
+ begin
+ rx := 0;
+ ry := 0;
+ rw := 0;
+ rh := 0;
+ result := false;
+ end;
+end;
+
+
+
+// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.getProxyEnabled (pid: TBodyProxyId): Boolean; inline;
begin
- if (pid >= 0) then result := ((mProxies[pid].mTag and TagDisabled) = 0) else result := false;
+ if (pid >= 0) and (pid < Length(mProxies)) then result := ((mProxies[pid].mTag and TagDisabled) = 0) else result := false;
end;
procedure TBodyGridBase.setProxyEnabled (pid: TBodyProxyId; val: Boolean); inline;
begin
- if (pid >= 0) then
+ if (pid >= 0) and (pid < Length(mProxies)) then
begin
if val then
begin
end
else
begin
- mProxies[pid].mTag := mProxies[pid].mTag or TagDisabled
+ mProxies[pid].mTag := mProxies[pid].mTag or TagDisabled;
end;
end;
end;
-function TBodyGridBase.allocCell: Integer;
+function TBodyGridBase.getProxyById (idx: TBodyProxyId): PBodyProxyRec; inline;
+begin
+ if (idx >= 0) and (idx < Length(mProxies)) then result := @mProxies[idx] else result := nil;
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.allocCell (): Integer;
var
idx: Integer;
+ pc: PGridCell;
begin
if (mFreeCell < 0) then
begin
for idx := mFreeCell to High(mCells) do
begin
mCells[idx].bodies[0] := -1;
+ mCells[idx].bodies[GridCellBucketSize-1] := -1; // 'has free room' flag
mCells[idx].next := idx+1;
end;
mCells[High(mCells)].next := -1; // last cell
end;
result := mFreeCell;
- mFreeCell := mCells[result].next;
- mCells[result].next := -1;
- mCells[result].bodies[0] := -1;
+ pc := @mCells[result];
+ mFreeCell := pc.next;
+ pc.next := -1;
Inc(mUsedCells);
//e_WriteLog(Format('grid: allocated new cell #%d (total: %d)', [result, mUsedCells]), MSG_NOTIFY);
end;
begin
if (idx >= 0) and (idx < Length(mCells)) then
begin
- //if mCells[idx].body = -1 then exit; // the thing that should not be
- mCells[idx].bodies[0] := -1;
- mCells[idx].next := mFreeCell;
+ with mCells[idx] do
+ begin
+ bodies[0] := -1;
+ bodies[GridCellBucketSize-1] := -1; // 'has free room' flag
+ next := mFreeCell;
+ end;
mFreeCell := idx;
Dec(mUsedCells);
end;
end;
+// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId;
var
olen, idx: Integer;
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;
var
+ gw, gh: Integer;
+ ex, ey: Integer;
gx, gy: Integer;
- gw, gh, tsize: 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);
+ 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;
+ ccidx: Integer;
pc: Integer;
pi: PGridCell;
f: Integer;
pc := mGrid[grida];
if (pc <> -1) then
begin
- pi := @mCells[pc];
- f := 0;
- for f := 0 to High(TGridCell.bodies) do
+ {$IF DEFINED(D2F_DEBUG)}
+ ccidx := pc;
+ while (ccidx <> -1) do
begin
- if (pi.bodies[f] = -1) then
+ pi := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
begin
- // can add here
- pi.bodies[f] := mUData;
- if (f+1 < Length(TGridCell.bodies)) then pi.bodies[f+1] := -1;
- exit;
+ if (pi.bodies[f] = -1) then break;
+ if (pi.bodies[f] = bodyId) then raise Exception.Create('trying to insert already inserted proxy');
end;
+ ccidx := pi.next;
end;
- 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;
- mGrid[grida] := cidx;
-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);
+ {$ENDIF}
+ ccidx := pc;
+ while (ccidx <> -1) do
+ begin
+ pi := @mCells[ccidx];
+ // check "has room" flag
+ if (pi.bodies[GridCellBucketSize-1] = -1) then
+ begin
+ // can add here
+ for f := 0 to GridCellBucketSize-1 do
+ begin
+ if (pi.bodies[f] = -1) then
+ begin
+ pi.bodies[f] := bodyId;
+ if (f+1 < GridCellBucketSize) then pi.bodies[f+1] := -1;
+ exit;
+ end;
+ end;
+ raise Exception.Create('internal error in grid inserter');
+ end;
+ // no room, go to next cell in list (if there is any)
+ ccidx := pi.next;
+ end;
+ // no room in cells, add new cell to list
+ end;
+ // either no room, or no cell at all
+ ccidx := allocCell();
+ pi := @mCells[ccidx];
+ pi.bodies[0] := bodyId;
+ pi.bodies[1] := -1;
+ pi.next := pc;
+ mGrid[grida] := ccidx;
end;
-function TBodyGridBase.remover (grida: Integer): Boolean;
+// assume that we cannot have one object added to bucket twice
+function TBodyGridBase.remover (grida: Integer; bodyId: TBodyProxyId): Boolean;
var
- f: Integer;
- pidx, idx, tmp: Integer;
+ f, c: Integer;
+ pidx, ccidx: Integer;
pc: PGridCell;
begin
result := false; // never stop
// find and remove cell
- pidx := -1;
- idx := mGrid[grida];
- while (idx >= 0) do
+ pidx := -1; // previous cell index
+ ccidx := mGrid[grida]; // current cell index
+ while (ccidx <> -1) do
begin
- tmp := mCells[idx].next;
- pc := @mCells[idx];
- f := 0;
- while (f < High(TGridCell.bodies)) do
+ pc := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
begin
- if (pc.bodies[f] = mUData) then
+ if (pc.bodies[f] = bodyId) then
begin
// 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
+ if (pidx = -1) then mGrid[grida] := pc.next else mCells[pidx].next := pc.next;
+ freeCell(ccidx);
+ exit;
+ end;
+ // remove element from bucket
+ for c := f to GridCellBucketSize-2 do
begin
- // remove element from bucket
- Inc(f);
- while (f < High(TGridCell.bodies)) do
- begin
- pc.bodies[f-1] := pc.bodies[f];
- if (pc.bodies[f] = -1) then break;
- Inc(f);
- end;
- pc.bodies[High(TGridCell.bodies)] := -1; // just in case
+ pc.bodies[c] := pc.bodies[c+1];
+ if (pc.bodies[c] = -1) then break;
end;
- exit; // assume that we cannot have one object added to bucket twice
+ pc.bodies[GridCellBucketSize-1] := -1; // "has free room" flag
+ exit;
end;
- Inc(f);
end;
- pidx := idx;
- idx := tmp;
+ pidx := ccidx;
+ ccidx := pc.next;
end;
end;
-// absolutely not tested
-procedure TBodyGridBase.remove (body: 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);
+ //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
px := @mProxies[body];
- mUData := body;
- forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover);
+ //removeInternal(body);
+ forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
+ freeProxy(body);
end;
-function TBodyGridBase.insertBody (aObj: ITP; aX, aY, aWidth, aHeight: Integer; aTag: Integer=0): TBodyProxyId;
+// ////////////////////////////////////////////////////////////////////////// //
+procedure TBodyGridBase.moveResizeBody (body: TBodyProxyId; nx, ny, nw, nh: Integer);
+var
+ px: PBodyProxyRec;
+ x0, y0, w, h: Integer;
begin
- result := allocProxy(aX, aY, aWidth, aHeight, aObj, aTag);
- insert(result);
+ if (body < 0) or (body > High(mProxies)) then exit; // just in case
+ px := @mProxies[body];
+ x0 := px.mX;
+ y0 := px.mY;
+ w := px.mWidth;
+ h := px.mHeight;
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format('proxy #%d: MOVERESIZE: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d;nw=%d;nh=%d', [body, x0-mMinX, y0-mMinY, w, h, nx-mMinX, ny-mMinY, nw, nh]), MSG_NOTIFY);
+ {$ENDIF}
+ if (nx = x0) and (ny = y0) and (nw = w) and (nh = h) then exit;
+ // map -> grid
+ Dec(x0, mMinX);
+ Dec(y0, mMinY);
+ Dec(nx, mMinX);
+ Dec(ny, mMinY);
+ // did any corner crossed tile boundary?
+ if (x0 div mTileSize <> nx div mTileSize) or
+ (y0 div mTileSize <> ny div mTileSize) or
+ ((x0+w-1) div mTileSize <> (nx+nw-1) div mTileSize) or
+ ((y0+h-1) div mTileSize <> (ny+nh-1) div mTileSize) then
+ begin
+ //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);
+ forGridRect(px.mX, px.mY, nw, nh, inserter, body);
+ end
+ else
+ begin
+ px.mX := nx+mMinX;
+ px.mY := ny+mMinY;
+ px.mWidth := nw;
+ px.mHeight := nh;
+ end;
end;
-procedure TBodyGridBase.removeBody (aObj: TBodyProxyId);
+//TODO: optimize for horizontal/vertical moves
+procedure TBodyGridBase.moveBody (body: TBodyProxyId; nx, ny: Integer);
+var
+ px: PBodyProxyRec;
+ x0, y0: Integer;
+ ogx0, ogx1, ogy0, ogy1: Integer; // old grid rect
+ ngx0, ngx1, ngy0, ngy1: Integer; // new grid rect
+ gx, gy: Integer;
+ gw, gh: Integer;
+ pw, ph: Integer;
begin
- if (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
+ // check if tile coords was changed
+ px := @mProxies[body];
+ x0 := px.mX;
+ y0 := px.mY;
+ if (nx = x0) and (ny = y0) then exit;
+ // map -> grid
+ Dec(x0, mMinX);
+ Dec(y0, mMinY);
+ Dec(nx, mMinX);
+ Dec(ny, mMinY);
+ // check for heavy work
+ pw := px.mWidth;
+ ph := px.mHeight;
+ ogx0 := x0 div mTileSize;
+ ogy0 := y0 div mTileSize;
+ ngx0 := nx div mTileSize;
+ ngy0 := ny div mTileSize;
+ ogx1 := (x0+pw-1) div mTileSize;
+ ogy1 := (y0+ph-1) div mTileSize;
+ ngx1 := (nx+pw-1) div mTileSize;
+ ngy1 := (ny+ph-1) div mTileSize;
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format('proxy #%d: checkmove: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d og:(%d,%d)-(%d,%d); ng:(%d,%d)-(%d,%d)', [body, x0, y0, pw, ph, nx, ny, ogx0, ogy0, ogx1, ogy1, ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY);
+ {$ENDIF}
+ if (ogx0 <> ngx0) or (ogy0 <> ngy0) or (ogx1 <> ngx1) or (ogy1 <> ngy1) then
+ begin
+ // crossed tile boundary, do heavy work
+ gw := mWidth;
+ gh := mHeight;
+ // cycle with old rect, remove body where it is necessary
+ // optimized for horizontal moves
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format('proxy #%d: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d og:(%d,%d)-(%d,%d); ng:(%d,%d)-(%d,%d)', [body, x0, y0, pw, ph, nx, ny, ogx0, ogy0, ogx1, ogy1, ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY);
+ {$ENDIF}
+ // remove stale marks
+ if not ((ogy0 >= gh) or (ogy1 < 0)) and
+ not ((ogx0 >= gw) or (ogx1 < 0)) then
+ begin
+ if (ogx0 < 0) then ogx0 := 0;
+ if (ogy0 < 0) then ogy0 := 0;
+ if (ogx1 > gw-1) then ogx1 := gw-1;
+ if (ogy1 > gh-1) then ogy1 := gh-1;
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format(' norm og:(%d,%d)-(%d,%d)', [ogx0, ogy0, ogx1, ogy1]), MSG_NOTIFY);
+ {$ENDIF}
+ for gx := ogx0 to ogx1 do
+ begin
+ if (gx < ngx0) or (gx > ngx1) then
+ begin
+ // this column is completely outside of new rect
+ for gy := ogy0 to ogy1 do
+ begin
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format(' remove0:(%d,%d)', [gx, gy]), MSG_NOTIFY);
+ {$ENDIF}
+ remover(gy*gw+gx, body);
+ end;
+ end
+ else
+ begin
+ // heavy checks
+ for gy := ogy0 to ogy1 do
+ begin
+ if (gy < ngy0) or (gy > ngy1) then
+ begin
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format(' remove1:(%d,%d)', [gx, gy]), MSG_NOTIFY);
+ {$ENDIF}
+ remover(gy*gw+gx, body);
+ end;
+ end;
+ end;
+ end;
+ end;
+ // cycle with new rect, add body where it is necessary
+ if not ((ngy0 >= gh) or (ngy1 < 0)) and
+ not ((ngx0 >= gw) or (ngx1 < 0)) then
+ begin
+ if (ngx0 < 0) then ngx0 := 0;
+ if (ngy0 < 0) then ngy0 := 0;
+ if (ngx1 > gw-1) then ngx1 := gw-1;
+ if (ngy1 > gh-1) then ngy1 := gh-1;
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format(' norm ng:(%d,%d)-(%d,%d)', [ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY);
+ {$ENDIF}
+ for gx := ngx0 to ngx1 do
+ begin
+ if (gx < ogx0) or (gx > ogx1) then
+ begin
+ // this column is completely outside of old rect
+ for gy := ngy0 to ngy1 do
+ begin
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format(' insert0:(%d,%d)', [gx, gy]), MSG_NOTIFY);
+ {$ENDIF}
+ inserter(gy*gw+gx, body);
+ end;
+ end
+ else
+ begin
+ // heavy checks
+ for gy := ngy0 to ngy1 do
+ begin
+ if (gy < ogy0) or (gy > ogy1) then
+ begin
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format(' insert1:(%d,%d)', [gx, gy]), MSG_NOTIFY);
+ {$ENDIF}
+ inserter(gy*gw+gx, body);
+ end;
+ end;
+ end;
+ end;
+ end;
+ // done
+ end
+ else
+ begin
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format('proxy #%d: GRID OK: xg=%d;yg=%d;w=%d;h=%d;nx=%d;ny=%d og:(%d,%d)-(%d,%d); ng:(%d,%d)-(%d,%d)', [body, x0, y0, pw, ph, nx, ny, ogx0, ogy0, ogx1, ogy1, ngx0, ngy0, ngx1, ngy1]), MSG_NOTIFY);
+ {$ENDIF}
+ end;
+ // update coordinates
+ px.mX := nx+mMinX;
+ px.mY := ny+mMinY;
end;
-procedure TBodyGridBase.moveResizeBody (body: TBodyProxyId; dx, dy, sx, sy: Integer);
+procedure TBodyGridBase.resizeBody (body: TBodyProxyId; nw, nh: Integer);
var
px: PBodyProxyRec;
+ x0, y0, w, h: Integer;
begin
if (body < 0) or (body > High(mProxies)) then exit; // just in case
- if ((dx = 0) and (dy = 0) and (sx = 0) and (sy = 0)) then exit;
- remove(body);
+ // check if tile coords was changed
px := @mProxies[body];
- Inc(px.mX, dx);
- Inc(px.mY, dy);
- Inc(px.mWidth, sx);
- Inc(px.mHeight, sy);
- insert(body);
+ x0 := px.mX-mMinX;
+ y0 := px.mY-mMinY;
+ w := px.mWidth;
+ h := px.mHeight;
+ {$IF DEFINED(D2F_DEBUG_MOVER)}
+ e_WriteLog(Format('proxy #%d: RESIZE: xg=%d;yg=%d;w=%d;h=%d;nw=%d;nh=%d', [body, x0, y0, w, h, nw, nh]), MSG_NOTIFY);
+ {$ENDIF}
+ if ((x0+w-1) div mTileSize <> (x0+nw-1) div mTileSize) or
+ ((y0+h-1) div mTileSize <> (y0+nh-1) div mTileSize) then
+ begin
+ // crossed tile boundary, do heavy work
+ //removeInternal(body);
+ forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
+ px.mWidth := nw;
+ px.mHeight := nh;
+ //insertInternal(body);
+ forGridRect(px.mX, px.mY, nw, nh, inserter, body);
+ end
+ else
+ begin
+ // nothing to do with the grid, just fix size
+ px.mWidth := nw;
+ px.mHeight := nh;
+ end;
end;
-procedure TBodyGridBase.moveBody (body: TBodyProxyId; dx, dy: Integer);
-begin
- moveResizeBody(body, dx, dy, 0, 0);
-end;
-procedure TBodyGridBase.resizeBody (body: TBodyProxyId; sx, sy: Integer);
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.atCellInPoint (x, y: Integer): TAtPointEnumerator;
+var
+ ccidx: Integer = -1;
begin
- moveResizeBody(body, 0, 0, sx, sy);
+ Dec(x, mMinX);
+ Dec(y, mMinY);
+ if (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize) then ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
+ result := TAtPointEnumerator.Create(mCells, ccidx, getProxyById);
end;
// ////////////////////////////////////////////////////////////////////////// //
// no callback: return `true` on the first hit
-function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
+function TBodyGridBase.forEachAtPoint (x, y: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter;
var
f: Integer;
idx, curci: Integer;
px: PBodyProxyRec;
lq: LongWord;
ptag: Integer;
+ presobj: PITP;
begin
- result := false;
- if (tagmask = 0) then exit;
+ result := Iter.Create(framePool);
+ tagmask := tagmask and TagFullMask;
+ if (tagmask = 0) then begin result.finishIt(); exit; end;
+
+ {$IF DEFINED(D2F_DEBUG_XXQ)}
+ if (assigned(cb)) then e_WriteLog(Format('0: grid pointquery: (%d,%d)', [x, y]), MSG_NOTIFY);
+ {$ENDIF}
// make coords (0,0)-based
Dec(x, mMinX);
Dec(y, mMinY);
- if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then exit;
+ if (x < 0) or (y < 0) or (x >= mWidth*mTileSize) or (y >= mHeight*mTileSize) then begin result.finishIt(); exit; end;
curci := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
+
+ {$IF DEFINED(D2F_DEBUG_XXQ)}
+ if (assigned(cb)) then e_WriteLog(Format('1: grid pointquery: (%d,%d) (%d,%d) %d', [x, y, (x div mTileSize), (y div mTileSize), curci]), MSG_NOTIFY);
+ {$ENDIF}
+
// restore coords
Inc(x, mMinX);
Inc(y, mMinY);
end;
lq := mLastQuery;
+ {$IF DEFINED(D2F_DEBUG_XXQ)}
+ if (assigned(cb)) then e_WriteLog(Format('2: grid pointquery: (%d,%d); lq=%u', [x, y, lq]), MSG_NOTIFY);
+ {$ENDIF}
+
while (curci <> -1) do
begin
+ {$IF DEFINED(D2F_DEBUG_XXQ)}
+ //if (assigned(cb)) then e_WriteLog(Format(' cell #%d', [curci]), MSG_NOTIFY);
+ {$ENDIF}
cc := @mCells[curci];
- for f := 0 to High(TGridCell.bodies) do
+ for f := 0 to GridCellBucketSize-1 do
begin
if (cc.bodies[f] = -1) then break;
px := @mProxies[cc.bodies[f]];
- if (px.mQueryMark <> lq) then
+ {$IF DEFINED(D2F_DEBUG_XXQ)}
+ //if (assigned(cb)) then e_WriteLog(Format(' proxy #%d; qm:%u; tag:%08x; tagflag:%d %u', [cc.bodies[f], px.mQueryMark, px.mTag, (px.mTag and tagmask), LongWord(px.mObj)]), MSG_NOTIFY);
+ {$ENDIF}
+ if (px.mQueryMark = lq) then continue;
+ px.mQueryMark := lq;
+ ptag := px.mTag;
+ if (not allowDisabled) and ((ptag and TagDisabled) <> 0) then continue;
+ if ((ptag and tagmask) = 0) then continue;
+ if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then
begin
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((px.mTag and tagmask) <> 0) then
- begin
- if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then
- begin
- px.mQueryMark := lq;
- if assigned(cb) then result := cb(px.mObj, px.mTag) else result := true;
- if result then exit;
- end;
- end;
+ presobj := PITP(framePool.alloc(sizeof(ITP)));
+ Move(px.mObj, presobj^, sizeof(ITP));
+ if (firstHit) then begin result.finishIt(); exit; end;
end;
end;
curci := cc.next;
end;
+ result.finishIt();
end;
+// ////////////////////////////////////////////////////////////////////////// //
// no callback: return `true` on the first hit
-function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; cb: TGridQueryCB; tagmask: Integer=-1): Boolean;
+// return number of ITP thingys put into frame pool
+function TBodyGridBase.forEachInAABB (x, y, w, h: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter;
var
idx: Integer;
gx, gy: Integer;
+ sx, sy, ex, ey: Integer;
curci: Integer;
f: Integer;
cc: PGridCell = nil;
px: PBodyProxyRec;
lq: LongWord;
- tsize, gw: Integer;
+ gw, gh: Integer;
x0, y0: Integer;
ptag: Integer;
+ presobj: PITP;
begin
- result := false;
- if (w < 1) or (h < 1) then exit;
+ if (w = 1) and (h = 1) then
+ begin
+ result := forEachAtPoint(x, y, tagmask, allowDisabled, firstHit);
+ exit;
+ end;
+
+ result := Iter.Create(framePool);
+ if (w < 1) or (h < 1) then begin result.finishIt(); exit; end;
+
+ tagmask := tagmask and TagFullMask;
+ if (tagmask = 0) then begin result.finishIt(); exit; end;
x0 := x;
y0 := y;
Dec(y, mMinY);
gw := mWidth;
- tsize := mTileSize;
+ gh := mHeight;
- if (x+w <= 0) or (y+h <= 0) then exit;
- if (x >= gw*tsize) or (y >= mHeight*tsize) then exit;
+ if (x+w <= 0) or (y+h <= 0) then begin result.finishIt(); exit; end;
+ if (x >= gw*mTileSize) or (y >= gh*mTileSize) then begin result.finishIt(); exit; end;
+
+ sx := x div mTileSize;
+ sy := y div mTileSize;
+ ex := (x+w-1) div mTileSize;
+ ey := (y+h-1) div mTileSize;
+
+ // clip rect
+ if (sx < 0) then sx := 0 else if (sx >= gw) then sx := gw-1;
+ if (sy < 0) then sy := 0 else if (sy >= gh) then sy := gh-1;
+ if (ex < 0) then ex := 0 else if (ex >= gw) then ex := gw-1;
+ if (ey < 0) then ey := 0 else if (ey >= gh) then ey := gh-1;
+ if (sx > ex) or (sy > ey) then begin result.finishIt(); exit; end; // just in case
+
+ // has something to do
// increase query counter
Inc(mLastQuery);
lq := mLastQuery;
// go on
- for gy := y div tsize to (y+h-1) div tsize do
+ for gy := sy to ey do
begin
- if (gy < 0) then continue;
- if (gy >= mHeight) then break;
- for gx := x div tsize to (x+w-1) div tsize do
+ for gx := sx to ex do
begin
- if (gx < 0) then continue;
- if (gx >= gw) then break;
// process cells
curci := mGrid[gy*gw+gx];
while (curci <> -1) do
begin
cc := @mCells[curci];
- for f := 0 to High(TGridCell.bodies) do
+ for f := 0 to GridCellBucketSize-1 do
begin
if (cc.bodies[f] = -1) then break;
px := @mProxies[cc.bodies[f]];
- if (px.mQueryMark <> lq) then
- begin
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((px.mTag and tagmask) <> 0) 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 result := cb(px.mObj, px.mTag) else result := true;
- if result then exit;
- end;
- end;
+ // 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;
+ presobj := PITP(framePool.alloc(sizeof(ITP)));
+ Move(px.mObj, presobj^, sizeof(ITP));
+ if (firstHit) then begin result.finishIt(); exit; end;
end;
curci := cc.next;
end;
end;
end;
+ result.finishIt();
end;
// ////////////////////////////////////////////////////////////////////////// //
-// no callback: return `true` on the nearest hit
-function TBodyGridBase.traceRay (x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): Boolean;
+function TBodyGridBase.forEachAlongLine (ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1; log: Boolean=false): Iter;
var
- ex, ey: Integer;
+ 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;
+ presobj: PITP;
begin
- result := traceRay(ex, ey, x0, y0, x1, y1, cb, tagmask);
+ log := false;
+ result := Iter.Create(framePool);
+ tagmask := tagmask and TagFullMask;
+ if (tagmask = 0) then begin result.finishIt(); exit; end;
+
+ 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 begin result.finishIt(); exit; end; // out of screen
+
+ // 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
+ presobj := PITP(framePool.alloc(sizeof(ITP)));
+ Move(px.mObj, presobj^, sizeof(ITP));
+ end;
+ end;
+ // next cell
+ ccidx := cc.next;
+ end;
+ // done processing cells, move to next tile
+ until lw.stepToNextTile();
+ result.finishIt();
end;
-// no callback: return `true` on the nearest hit
-function TBodyGridBase.traceRay (out ex, ey: Integer; x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): Boolean;
+// ////////////////////////////////////////////////////////////////////////// //
+// trace box with the given velocity; return object hit (if any)
+function TBodyGridBase.traceBox (out ex, ey: Integer; const ax0, ay0, aw, ah: Integer; const dx, dy: Integer; tagmask: Integer=-1): ITP;
var
- i: Integer;
- dx, dy: Integer;
- xerr: Integer = 0;
- yerr: Integer = 0;
- d: Integer;
- 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;
+ gx, gy: Integer;
+ ccidx: Integer;
+ cc: PGridCell;
px: PBodyProxyRec;
lq: LongWord;
- prevX, prevY: Integer;
- minx, miny: Integer;
- ptag: Integer;
- lastDistSq, distSq: Integer;
- wasHit: Boolean = false;
+ f, ptag: Integer;
+ minu0: Single = 100000.0;
+ u0: Single;
+ cx0, cy0, cx1, cy1: Integer;
+ hitpx: PBodyProxyRec = nil;
begin
- result := false;
-
- if (tagmask = 0) then begin ex := x0; ey := y0; exit; end;
-
- // make coords (0,0)-based
- minx := mMinX;
- miny := mMinY;
- Dec(x0, minx);
- Dec(y0, miny);
- Dec(x1, minx);
- Dec(y1, miny);
+ result := Default(ITP);
+ ex := ax0+dx;
+ ey := ay0+dy;
+ if (aw < 1) or (ah < 1) then exit;
- dx := x1-x0;
- dy := y1-y0;
+ cx0 := nmin(ax0, ax0+dx);
+ cy0 := nmin(ay0, ay0+dy);
+ cx1 := nmax(ax0+aw-1, ax0+aw-1+dx);
+ cy1 := nmax(ay0+ah-1, ay0+ah-1+dy);
- if (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;
+ cx0 -= mMinX; cy0 -= mMinY;
+ cx1 -= mMinX; cy1 -= mMinY;
- dx := abs(dx);
- dy := abs(dy);
+ if (cx1 < 0) or (cy1 < 0) or (cx0 >= mWidth*mTileSize) or (cy0 >= mHeight*mTileSize) then exit;
- if (dx > dy) then d := dx else d := dy;
-
- x := x0;
- y := y0;
+ if (cx0 < 0) then cx0 := 0;
+ if (cy0 < 0) then cy0 := 0;
+ if (cx1 >= mWidth*mTileSize) then cx1 := mWidth*mTileSize-1;
+ if (cy1 >= mHeight*mTileSize) then cy1 := mHeight*mTileSize-1;
+ // just in case
+ if (cx0 > cx1) or (cy0 > cy1) then exit;
// increase query counter
Inc(mLastQuery);
begin
// just in case of overflow
mLastQuery := 1;
- for i := 0 to High(mProxies) do mProxies[i].mQueryMark := 0;
+ for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0;
end;
lq := mLastQuery;
- tsize := mTileSize;
- gw := mWidth;
- gh := mHeight;
- maxx := gw*tsize-1;
- maxy := gh*tsize-1;
- lastDistSq := (x1-x0)*(x1-x0)+(y1-y0)*(y1-y0)+1;
-
- for i := 1 to d do
+ for gy := cy0 div mTileSize to cy1 div mTileSize do
begin
- prevX := x+minx;
- prevY := y+miny;
- 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
+ for gx := cx0 div mTileSize to cx1 div mTileSize do
begin
- ga := (y div tsize)*gw+(x div tsize);
- if (lastGA <> ga) then
+ ccidx := mGrid[gy*mWidth+gx];
+ while (ccidx <> -1) do
begin
- // new cell
- lastGA := ga;
- ccidx := mGrid[lastGA];
+ 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 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;
+ 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;
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+{.$DEFINE D2F_DEBUG_OTR}
+function TBodyGridBase.traceOrthoRayWhileIn (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): Boolean;
+var
+ ccidx: Integer;
+ cc: PGridCell;
+ px: PBodyProxyRec;
+ ptag: Integer;
+ minx, miny: Integer;
+ f, c0, c1: Integer;
+ x0, y0, x1, y1: Integer;
+ celly0, celly1: Integer;
+ dy: Integer;
+ filled: array[0..mTileSize-1] of Byte;
+ {$IF DEFINED(D2F_DEBUG_OTR)}
+ s: AnsiString = '';
+ {$ENDIF}
+ it: Iter;
+begin
+ result := false;
+ ex := ax1;
+ ey := ay1;
+ if not ((ax0 = ax1) or (ay0 = ay1)) then raise Exception.Create('orthoray is not orthogonal');
+
+ tagmask := tagmask and TagFullMask;
+ if (tagmask = 0) then exit;
+
+ it := forEachAtPoint(ax0, ay0, tagmask, false, true);
+ if (it.length = 0) then begin it.release(); exit; end;
+ it.release();
+
+ minx := mMinX;
+ miny := mMinY;
+
+ // offset query coords to (0,0)-based
+ x0 := ax0-minx;
+ y0 := ay0-miny;
+ x1 := ax1-minx;
+ y1 := ay1-miny;
+
+ if (x0 = x1) then
+ begin
+ if (x0 < 0) or (x0 >= mWidth*mTileSize) then exit; // oops
+ // vertical
+ if (y0 < y1) then
+ begin
+ // down
+ if (y1 < 0) or (y0 >= mHeight*mTileSize) then exit;
+ //if (ay0 < 0) then ay0 := 0;
+ if (y0 < 0) then exit;
+ if (y1 >= mHeight*mTileSize) then y1 := mHeight*mTileSize-1;
+ dy := 1;
end
else
begin
- if (ccidx <> -1) then
- begin
- ccidx := -1;
- if assigned(cb) then result := cb(nil, 0, x+minx, y+miny, prevX, prevY) else result := wasHit;
- if result then exit;
- end;
+ // 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;
-
- if (ccidx <> -1) then
+ // check tile
+ while true do
begin
- curci := ccidx;
- hasUntried := false;
- Inc(x, minx);
- Inc(y, miny);
- while (curci <> -1) do
+ 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
- cc := @mCells[curci];
- for f := 0 to High(TGridCell.bodies) do
+ cc := @mCells[ccidx];
+ for f := 0 to GridCellBucketSize-1 do
begin
if (cc.bodies[f] = -1) then break;
px := @mProxies[cc.bodies[f]];
- if (px.mQueryMark <> lq) then
+ ptag := px.mTag;
+ if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and
+ (ax0 >= px.x0) and (ax0 <= px.x1) then
begin
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((px.mTag and tagmask) <> 0) then
- begin
- if (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then
- begin
- px.mQueryMark := lq;
- if assigned(cb) then
- begin
- result := cb(px.mObj, px.mTag, x, y, prevX, prevY);
- if result then begin ex := prevX; ey := prevY; exit; end;
- end
- else
- begin
- distSq := (prevX-x)*(prevX-x)+(prevY-y)*(prevY-y);
- if (distSq < lastDistSq) then
- begin
- wasHit := true;
- lastDistSq := distSq;
- ex := prevx;
- ey := prevy;
- end;
- end;
- end
- else
- begin
- hasUntried := true;
- end;
- end;
+ // 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;
- curci := cc.next;
+ // next cell
+ ccidx := cc.next;
end;
- if not hasUntried then
+ {$IF DEFINED(D2F_DEBUG_OTR)}
+ s := formatstrf(' x=%s; ay0=%s; ay1=%s; y0=%s; celly0=%s; celly1=%s; dy=%s; [', [ax0, ay0, ay1, y0, celly0, celly1, dy]);
+ for f := 0 to High(filled) do if (filled[f] <> 0) then s += '1' else s += '0';
+ s += ']';
+ e_LogWriteln(s);
+ {$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
- // don't process this cell anymore
- ccidx := -1;
- if assigned(cb) then result := cb(nil, 0, x, y, prevX, prevY) else result := wasHit;
- if result then exit; // don't update lasthit: it is done in real checker
+ // 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;
- Dec(x, minx);
- Dec(y, miny);
end;
+ end
+ else
+ begin
+ // horizontal
+ assert(false);
+ end;
+end;
+
+
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.traceRay (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP;
+var
+ ex, ey: Integer;
+begin
+ result := traceRay(ex, ey, x0, y0, x1, y1, tagmask);
+end;
+
+
+// you are not supposed to understand this
+function TBodyGridBase.traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): ITP;
+var
+ lw: TLineWalker;
+ ccidx: Integer;
+ 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;
+ lastDistSq, distSq, hx, hy: Integer;
+ firstCell: Boolean = true;
+ wasHit: Boolean;
+begin
+ result := Default(ITP);
+ tagmask := tagmask and TagFullMask;
+ if (tagmask = 0) 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
+
+ lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1;
+
+ {$IF DEFINED(D2F_DEBUG)}
+ //if assigned(dbgRayTraceTileHitCB) then e_LogWritefln('*** traceRay: (%s,%s)-(%s,%s)', [x0, y0, x1, y1]);
+ {$ENDIF}
+
+ // increase query counter
+ Inc(mLastQuery);
+ 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);
+ {$IF DEFINED(D2F_DEBUG)}
+ if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB(cx+mMinX, cy+mMinY);
+ {$ENDIF}
+ // check tile
+ ccidx := mGrid[(cy div mTileSize)*gw+(cx div mTileSize)];
+ // process cells
+ wasHit := false;
+ while (ccidx <> -1) do
+ begin
+ 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
+ // get adjusted proxy coords
+ px0 := px.mX-minx;
+ py0 := px.mY-miny;
+ px1 := px0+px.mWidth-1;
+ py1 := py0+px.mHeight-1;
+ {$IF DEFINED(D2F_DEBUG)}
+ //if assigned(dbgRayTraceTileHitCB) then e_LogWritefln(' cxy=(%s,%s); pan=(%s,%s)-(%s,%s)', [cx, cy, px0, py0, px1, py1]);
+ {$ENDIF}
+ // 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;
+ {$IF DEFINED(D2F_DEBUG)}
+ if assigned(dbgRayTraceTileHitCB) then e_LogWriteln(' INSIDE!');
+ {$ENDIF}
+ exit;
+ end;
+ // do line-vs-aabb test
+ if lineAABBIntersects(x0, y0, x1, y1, px0, py0, px1-px0+1, py1-py0+1, hx, hy) then
+ begin
+ // hit detected
+ distSq := distanceSq(x0, y0, hx, hy);
+ {$IF DEFINED(D2F_DEBUG)}
+ //if assigned(dbgRayTraceTileHitCB) then e_LogWritefln(' hit=(%s,%s); distSq=%s; lastDistSq=%s', [hx, hy, distSq, lastDistSq]);
+ {$ENDIF}
+ if (distSq < lastDistSq) then
+ begin
+ lastDistSq := distSq;
+ ex := hx+minx;
+ ey := hy+miny;
+ result := px.mObj;
+ wasHit := true;
+ end;
+ end;
+ end;
+ end;
+ // next cell
+ ccidx := cc.next;
+ end;
+ // done processing cells; exit if we registered a hit
+ // next cells can't have better candidates, obviously
+ if wasHit then exit;
+ firstCell := false;
+ // move to next tile
+ until lw.stepToNextTile();
end;