diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas
index 049868c7821e7784afa08dbe18e68ab97c0d6a31..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
{.$DEFINE D2F_DEBUG_XXQ}
{.$DEFINE D2F_DEBUG_MOVER}
{$ENDIF}
-{$DEFINE GRID_USE_ORTHO_ACCEL}
+{.$DEFINE GRID_USE_ORTHO_ACCEL}
+{$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; // must be power of two!
GridCellBucketSize = 8; // WARNING! can't be less than 2!
public
private
//mTileSize: Integer;
- const mTileSize = GridDefaultTileSize;
+ const mTileSize = GridTileSize;
type TGetProxyFn = function (pxidx: Integer): PBodyProxyRec of object;
public
mProxyFree: TBodyProxyId; // free
mProxyCount: Integer; // currently used
mProxyMaxCount: Integer;
- mInQuery: Boolean;
public
dbgShowTraceLog: Boolean;
function allocProxy (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer): TBodyProxyId;
procedure freeProxy (body: TBodyProxyId);
- procedure insertInternal (body: TBodyProxyId);
- procedure removeInternal (body: TBodyProxyId);
-
function forGridRect (x, y, w, h: Integer; cb: TGridInternalCB; bodyId: TBodyProxyId): Boolean;
function inserter (grida: Integer; bodyId: TBodyProxyId): Boolean;
function getBodyWH (body: TBodyProxyId; out rw, rh: Integer): Boolean; inline;
function getBodyDims (body: TBodyProxyId; out rx, ry, rw, rh: 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;
+ // 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: 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 object on the first hit or nil
- function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP;
+ // 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;
function atCellInPoint (x, y: Integer): TAtPointEnumerator;
- //WARNING: don't modify grid while any query is in progress (no checks are made!)
- // you can set enabled/disabled flag, tho (but iterator can still return objects disabled inside it)
- // cb with `(nil)` will be called before processing new tile
- // no callback: return object of the nearest hit or nil
- // if `inverted` is true, trace will register bodies *exluding* tagmask
- //WARNING: don't change tags in callbacks here!
- function traceRay (const x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; overload;
- function traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP;
+ // 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;
- //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
+ // 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 forEachAlongLine (ax0, ay0, ax1, ay1: Integer; cb: TGridQueryCB; tagmask: Integer=-1; log: Boolean=false): ITP;
+ function traceBox (out ex, ey: Integer; const ax0, ay0, aw, ah: Integer; const dx, dy: Integer; tagmask: Integer=-1): ITP;
// debug
- procedure forEachBodyCell (body: TBodyProxyId; cb: TCellQueryCB);
- function forEachInCell (x, y: Integer; cb: TGridQueryCB): ITP;
+ 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
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;
+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;
-function distanceSq (x0, y0, x1, y1: Integer): Integer; inline;
procedure swapInt (var a: Integer; var b: Integer); inline;
-function minInt (a, b: Integer): Integer; inline;
-function maxInt (a, b: Integer): Integer; inline;
+//function minInt (a, b: Integer): Integer; inline;
+//function maxInt (a, b: Integer): Integer; inline;
implementation
uses
- SysUtils, e_log, g_console, utils;
+ 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;
-function minInt (a, b: Integer): Integer; inline; begin if (a < b) then result := a else result := b; end;
-function maxInt (a, b: Integer): Integer; inline; begin if (a > b) then result := a else result := b; end;
-
-function distanceSq (x0, y0, x1, y1: Integer): Integer; inline; begin result := (x1-x0)*(x1-x0)+(y1-y0)*(y1-y0); end;
+//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;
// ////////////////////////////////////////////////////////////////////////// //
-// 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;
+constructor TLineWalker.Create (minx, miny, maxx, maxy: 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;
+ setClip(minx, miny, maxx, maxy);
+end;
+procedure TLineWalker.setClip (minx, miny, maxx, maxy: Integer); inline;
+begin
// clip rectange
- wx0 := bx;
- wy0 := by;
- wx1 := bx+bw-1;
- wy1 := by+bh-1;
+ wx0 := minx;
+ wy0 := miny;
+ wx1 := maxx;
+ wy1 := maxy;
+end;
- // horizontal setup
- if (x0 < x1) then
+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
- // from left to right
- if (x0 > wx1) or (x1 < wx0) then exit; // out of screen
- stx := 1; // going right
+ result := true;
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);
+ 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;
- // vertical setup
- if (y0 < y1) then
+ // check for ortho lines
+ if (y0 = y1) then
begin
- // from top to bottom
- if (y0 > wy1) or (y1 < wy0) then exit; // out of screen
- sty := 1; // going down
+ // 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
- // 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);
+ // 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;
- dsx := x1-x0;
- dsy := y1-y0;
+function TLineWalker.done (): Boolean; inline; begin result := (stleft <= 0); end;
- if (dsx < dsy) then
+// true: done
+function TLineWalker.step (): Boolean; inline;
+begin
+ if horiz then
begin
- d0 := @yd;
- d1 := @xd;
- swapInt(x0, y0);
- swapInt(x1, y1);
- swapInt(dsx, dsy);
- swapInt(wx0, wy0);
- swapInt(wx1, wy1);
- swapInt(stx, sty);
+ xd += stx;
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; yd += sty; end;
end
else
begin
- d0 := @xd;
- d1 := @yd;
+ yd += sty;
+ err += errinc;
+ if (err >= 0) then begin err -= errmax; xd += stx; end;
end;
+ Dec(stleft);
+ result := (stleft <= 0);
+end;
- dx2 := 2*dsx;
- dy2 := 2*dsy;
- xd := x0;
- yd := y0;
- e := 2*dsy-dsx;
- //!term := x1;
+// true: done
+function TLineWalker.stepToNextTile (): Boolean; inline;
+var
+ ex, ey: Integer;
+ xwalk, ywalk, wklen: Integer; // to the respective edges
+ f: Integer;
+begin
+ result := false;
- xfixed := false;
- if (y0 < wy0) then
+ if (stleft < 2) then begin result := true; exit; end; // max one pixel left, nothing to do
+
+ // strictly horizontal?
+ if (sty = 0) 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
+ // only xd
+ if (stx < 0) then
+ begin
+ // xd: to left edge
+ ex := (xd and (not (TileSize-1)))-1;
+ stleft -= xd-ex;
+ end
+ else
begin
- yd := wy0;
- e -= rem+dsx;
- if (rem > 0) then begin Inc(xd); e += dy2; end;
- xfixed := true;
+ // xd: to right edge
+ ex := (xd or (TileSize-1))+1;
+ stleft -= ex-xd;
end;
+ result := (stleft <= 0);
+ xd := ex;
+ exit;
end;
- if (not xfixed) and (x0 < wx0) then
+ // strictly vertical?
+ if (stx = 0) 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;
+ // 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;
- (*
- if (y1 > wy1) then
+ // diagonal
+
+ // calculate xwalk
+ if (stx < 0) then
+ begin
+ ex := (xd and (not (TileSize-1)))-1;
+ xwalk := xd-ex;
+ end
+ else
begin
- // clip at bottom
- temp := dx2*(wy1-y0)+dsx;
- term := x0+temp div dy2;
- rem := temp mod dy2;
- if (rem = 0) then Dec(term);
+ ex := (xd or (TileSize-1))+1;
+ xwalk := ex-xd;
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
- *)
+ // 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;
- if (sty = -1) then yd := -yd;
- if (stx = -1) then begin xd := -xd; {!term := -term;} end;
- //!dx2 -= dy2;
+ {
+ 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;
+ }
- inx := d0^;
- iny := d1^;
- result := true;
+ 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;
+
// ////////////////////////////////////////////////////////////////////////// //
procedure TBodyGridBase.TBodyProxyRec.setup (aX, aY, aWidth, aHeight: Integer; aObj: ITP; aTag: Integer);
mProxyFree := 0;
mProxyCount := 0;
mProxyMaxCount := 0;
- 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;
// ////////////////////////////////////////////////////////////////////////// //
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;
-procedure TBodyGridBase.forEachBodyCell (body: TBodyProxyId; cb: TCellQueryCB);
+function TBodyGridBase.forEachBodyCell (body: TBodyProxyId): CellCoordIter;
var
- g, f, cidx: Integer;
+ g, f, ccidx: Integer;
cc: PGridCell;
+ presobj: PGridCellCoord;
begin
- if (body < 0) or (body > High(mProxies)) or not assigned(cb) then exit;
+ 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
- cidx := mGrid[g];
- while (cidx <> -1) do
+ ccidx := mGrid[g];
+ while (ccidx <> -1) do
begin
- cc := @mCells[cidx];
+ cc := @mCells[ccidx];
for f := 0 to GridCellBucketSize-1 do
begin
if (cc.bodies[f] = -1) then break;
- if (cc.bodies[f] = body) then cb((g mod mWidth)*mTileSize+mMinX, (g div mWidth)*mTileSize+mMinY);
+ 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
- cidx := cc.next;
+ ccidx := cc.next;
end;
end;
+ result.finishIt();
end;
-function TBodyGridBase.forEachInCell (x, y: Integer; cb: TGridQueryCB): ITP;
+function TBodyGridBase.forEachInCell (x, y: Integer): Iter;
var
- f, cidx: Integer;
+ f, ccidx: Integer;
cc: PGridCell;
+ presobj: PITP;
begin
- result := Default(ITP);
- if not assigned(cb) then exit;
+ 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 exit;
- cidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
- while (cidx <> -1) do
+ 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[cidx];
+ cc := @mCells[ccidx];
for f := 0 to GridCellBucketSize-1 do
begin
if (cc.bodies[f] = -1) then break;
- if cb(mProxies[cc.bodies[f]].mObj, mProxies[cc.bodies[f]].mTag) then begin result := mProxies[cc.bodies[f]].mObj; exit; end;
+ //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
- cidx := cc.next;
+ ccidx := cc.next;
end;
+ result.finishIt();
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
function TBodyGridBase.getProxyById (idx: TBodyProxyId): PBodyProxyRec; inline;
begin
- if (idx >= 0) and (idx < High(mProxies)) then result := @mProxies[idx] else result := nil;
+ if (idx >= 0) and (idx < Length(mProxies)) then result := @mProxies[idx] else result := nil;
end;
// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.forGridRect (x, y, w, h: Integer; cb: TGridInternalCB; bodyId: TBodyProxyId): Boolean;
-const
- tsize = mTileSize;
var
- gx, gy: Integer;
gw, gh: Integer;
+ ex, ey: Integer;
+ gx, gy: Integer;
begin
result := false;
if (w < 1) or (h < 1) or not assigned(cb) then exit;
if (x+w <= 0) or (y+h <= 0) then exit;
gw := mWidth;
gh := mHeight;
- //tsize := mTileSize;
- if (x >= gw*tsize) or (y >= gh*tsize) then exit;
- for gy := y div tsize to (y+h-1) div tsize do
- begin
- if (gy < 0) then continue;
- if (gy >= gh) then break;
- for gx := x div tsize to (x+w-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
+ for gx := x to ex do
begin
- if (gx < 0) then continue;
- if (gx >= gw) then break;
result := cb(gy*gw+gx, bodyId);
if result then exit;
end;
// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.inserter (grida: Integer; bodyId: TBodyProxyId): Boolean;
var
- cidx: Integer;
+ ccidx: Integer;
pc: Integer;
pi: PGridCell;
f: Integer;
if (pc <> -1) then
begin
{$IF DEFINED(D2F_DEBUG)}
- cidx := pc;
- while (cidx <> -1) do
+ ccidx := pc;
+ while (ccidx <> -1) do
begin
- pi := @mCells[cidx];
+ pi := @mCells[ccidx];
for f := 0 to GridCellBucketSize-1 do
begin
if (pi.bodies[f] = -1) then break;
if (pi.bodies[f] = bodyId) then raise Exception.Create('trying to insert already inserted proxy');
end;
- cidx := pi.next;
+ ccidx := pi.next;
end;
{$ENDIF}
- cidx := pc;
- while (cidx <> -1) do
+ ccidx := pc;
+ while (ccidx <> -1) do
begin
- pi := @mCells[cidx];
+ pi := @mCells[ccidx];
// check "has room" flag
if (pi.bodies[GridCellBucketSize-1] = -1) then
begin
raise Exception.Create('internal error in grid inserter');
end;
// no room, go to next cell in list (if there is any)
- cidx := pi.next;
+ ccidx := pi.next;
end;
// no room in cells, add new cell to list
end;
// either no room, or no cell at all
- cidx := allocCell();
- pi := @mCells[cidx];
+ ccidx := allocCell();
+ pi := @mCells[ccidx];
pi.bodies[0] := bodyId;
pi.bodies[1] := -1;
pi.next := pc;
- mGrid[grida] := cidx;
-end;
-
-procedure TBodyGridBase.insertInternal (body: TBodyProxyId);
-var
- px: PBodyProxyRec;
-begin
- if (body < 0) or (body > High(mProxies)) then exit; // just in case
- px := @mProxies[body];
- forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, inserter, body);
+ mGrid[grida] := ccidx;
end;
function TBodyGridBase.remover (grida: Integer; bodyId: TBodyProxyId): Boolean;
var
f, c: Integer;
- pidx, cidx: Integer;
+ pidx, ccidx: Integer;
pc: PGridCell;
begin
result := false; // never stop
// find and remove cell
pidx := -1; // previous cell index
- cidx := mGrid[grida]; // current cell index
- while (cidx <> -1) do
+ ccidx := mGrid[grida]; // current cell index
+ while (ccidx <> -1) do
begin
- pc := @mCells[cidx];
+ pc := @mCells[ccidx];
for f := 0 to GridCellBucketSize-1 do
begin
if (pc.bodies[f] = bodyId) then
begin
// this cell contains no elements, remove it
if (pidx = -1) then mGrid[grida] := pc.next else mCells[pidx].next := pc.next;
- freeCell(cidx);
+ freeCell(ccidx);
exit;
end;
// remove element from bucket
exit;
end;
end;
- pidx := cidx;
- cidx := pc.next;
+ pidx := ccidx;
+ ccidx := pc.next;
end;
end;
-procedure TBodyGridBase.removeInternal (body: TBodyProxyId);
-var
- px: PBodyProxyRec;
-begin
- if (body < 0) or (body > High(mProxies)) then exit; // just in case
- px := @mProxies[body];
- forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
-end;
-
// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.insertBody (aObj: ITP; aX, aY, aWidth, aHeight: Integer; aTag: Integer=-1): TBodyProxyId;
begin
aTag := aTag and TagFullMask;
result := allocProxy(aX, aY, aWidth, aHeight, aObj, aTag);
- insertInternal(result);
+ //insertInternal(result);
+ forGridRect(aX, aY, aWidth, aHeight, inserter, result);
end;
procedure TBodyGridBase.removeBody (body: TBodyProxyId);
+var
+ px: PBodyProxyRec;
begin
if (body < 0) or (body > High(mProxies)) then exit; // just in case
- removeInternal(body);
+ px := @mProxies[body];
+ //removeInternal(body);
+ forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
freeProxy(body);
end;
// did any corner crossed tile boundary?
if (x0 div mTileSize <> nx div mTileSize) or
(y0 div mTileSize <> ny div mTileSize) or
- ((x0+w) div mTileSize <> (nx+nw) div mTileSize) or
- ((y0+h) div mTileSize <> (ny+nh) div mTileSize) then
+ ((x0+w-1) div mTileSize <> (nx+nw-1) div mTileSize) or
+ ((y0+h-1) div mTileSize <> (ny+nh-1) div mTileSize) then
begin
- removeInternal(body);
+ //writeln('moveResizeBody: cell occupation changed! old=(', x0, ',', y0, ')-(', x0+w-1, ',', y0+h-1, '); new=(', nx, ',', ny, ')-(', nx+nw-1, ',', ny+nh-1, ')');
+ //removeInternal(body);
+ forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
px.mX := nx+mMinX;
px.mY := ny+mMinY;
px.mWidth := nw;
px.mHeight := nh;
- insertInternal(body);
+ //insertInternal(body);
+ forGridRect(px.mX, px.mY, nw, nh, inserter, body);
end
else
begin
end;
end;
+
//TODO: optimize for horizontal/vertical moves
procedure TBodyGridBase.moveBody (body: TBodyProxyId; nx, ny: Integer);
var
px.mY := ny+mMinY;
end;
+
procedure TBodyGridBase.resizeBody (body: TBodyProxyId; nw, nh: Integer);
var
px: PBodyProxyRec;
{$IF DEFINED(D2F_DEBUG_MOVER)}
e_WriteLog(Format('proxy #%d: RESIZE: xg=%d;yg=%d;w=%d;h=%d;nw=%d;nh=%d', [body, x0, y0, w, h, nw, nh]), MSG_NOTIFY);
{$ENDIF}
- if ((x0+w) div mTileSize <> (x0+nw) div mTileSize) or
- ((y0+h) div mTileSize <> (y0+nh) div mTileSize) then
+ if ((x0+w-1) div mTileSize <> (x0+nw-1) div mTileSize) or
+ ((y0+h-1) div mTileSize <> (y0+nh-1) div mTileSize) then
begin
// crossed tile boundary, do heavy work
- removeInternal(body);
+ //removeInternal(body);
+ forGridRect(px.mX, px.mY, px.mWidth, px.mHeight, remover, body);
px.mWidth := nw;
px.mHeight := nh;
- insertInternal(body);
+ //insertInternal(body);
+ forGridRect(px.mX, px.mY, nw, nh, inserter, body);
end
else
begin
// ////////////////////////////////////////////////////////////////////////// //
function TBodyGridBase.atCellInPoint (x, y: Integer): TAtPointEnumerator;
var
- cidx: Integer = -1;
+ ccidx: Integer = -1;
begin
Dec(x, mMinX);
Dec(y, mMinY);
- if (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize) then cidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
- result := TAtPointEnumerator.Create(mCells, cidx, getProxyById);
+ if (x >= 0) and (y >= 0) and (x < mWidth*mTileSize) and (y < mHeight*mTileSize) then ccidx := mGrid[(y div mTileSize)*mWidth+(x div mTileSize)];
+ result := TAtPointEnumerator.Create(mCells, ccidx, getProxyById);
end;
// ////////////////////////////////////////////////////////////////////////// //
// no callback: return `true` on the first hit
-function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP;
+function TBodyGridBase.forEachAtPoint (x, y: Integer; tagmask: Integer=-1; allowDisabled: Boolean=false; firstHit: Boolean=false): Iter;
var
f: Integer;
idx, curci: Integer;
px: PBodyProxyRec;
lq: LongWord;
ptag: Integer;
+ presobj: PITP;
begin
- result := Default(ITP);
- if (exittag <> nil) then exittag^ := 0;
+ result := Iter.Create(framePool);
tagmask := tagmask and TagFullMask;
- if (tagmask = 0) then exit;
+ if (tagmask = 0) then begin result.finishIt(); exit; end;
{$IF DEFINED(D2F_DEBUG_XXQ)}
if (assigned(cb)) then e_WriteLog(Format('0: grid pointquery: (%d,%d)', [x, y]), MSG_NOTIFY);
// 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)];
while (curci <> -1) do
begin
{$IF DEFINED(D2F_DEBUG_XXQ)}
- if (assigned(cb)) then e_WriteLog(Format(' cell #%d', [curci]), MSG_NOTIFY);
+ //if (assigned(cb)) then e_WriteLog(Format(' cell #%d', [curci]), MSG_NOTIFY);
{$ENDIF}
cc := @mCells[curci];
for f := 0 to GridCellBucketSize-1 do
if (cc.bodies[f] = -1) then break;
px := @mProxies[cc.bodies[f]];
{$IF DEFINED(D2F_DEBUG_XXQ)}
- if (assigned(cb)) then e_WriteLog(Format(' proxy #%d; qm:%u; tag:%08x; tagflag:%d %u', [cc.bodies[f], px.mQueryMark, px.mTag, (px.mTag and tagmask), LongWord(px.mObj)]), MSG_NOTIFY);
+ //if (assigned(cb)) then e_WriteLog(Format(' proxy #%d; qm:%u; tag:%08x; tagflag:%d %u', [cc.bodies[f], px.mQueryMark, px.mTag, (px.mTag and tagmask), LongWord(px.mObj)]), MSG_NOTIFY);
{$ENDIF}
- // shit. has to do it this way, so i can change tag in callback
- if (px.mQueryMark <> lq) then
+ 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
- px.mQueryMark := lq;
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and
- (x >= px.mX) and (y >= px.mY) and (x < px.mX+px.mWidth) and (y < px.mY+px.mHeight) then
- begin
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag) then
- begin
- result := px.mObj;
- if (exittag <> nil) then exittag^ := ptag;
- exit;
- end;
- end
- else
- begin
- result := px.mObj;
- if (exittag <> nil) then exittag^ := ptag;
- exit;
- end;
- end;
+ 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; allowDisabled: Boolean=false): ITP;
-const
- tsize = mTileSize;
+// 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;
- gw: Integer;
+ gw, gh: Integer;
x0, y0: Integer;
ptag: Integer;
+ presobj: PITP;
begin
- result := Default(ITP);
- 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 exit;
+ 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;
- if mInQuery then raise Exception.Create('recursive queries aren''t supported');
- mInQuery := true;
+ // 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
if (cc.bodies[f] = -1) then break;
px := @mProxies[cc.bodies[f]];
- // shit. has to do it this way, so i can change tag in callback
+ // 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 ((ptag and tagmask) = 0) then continue;
if (x0 >= px.mX+px.mWidth) or (y0 >= px.mY+px.mHeight) then continue;
if (x0+w <= px.mX) or (y0+h <= px.mY) then continue;
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag) then begin result := px.mObj; mInQuery := false; exit; end;
- end
- else
- begin
- result := px.mObj;
- mInQuery := false;
- exit;
- end;
+ 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;
-
- mInQuery := false;
+ result.finishIt();
end;
// ////////////////////////////////////////////////////////////////////////// //
-// no callback: return `true` on the nearest hit
-function TBodyGridBase.traceRay (const x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP;
-var
- ex, ey: Integer;
-begin
- result := traceRay(ex, ey, x0, y0, x1, y1, cb, tagmask);
-end;
-
-
-// no callback: return `true` on the nearest hit
-// you are not supposed to understand this
-function TBodyGridBase.traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP;
-const
- tsize = mTileSize;
+function TBodyGridBase.forEachAlongLine (ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1; log: Boolean=false): Iter;
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;
+ lw: TLineWalker;
+ ccidx: Integer;
cc: PGridCell;
px: PBodyProxyRec;
lq: LongWord;
- f, ptag, distSq: Integer;
- x0, y0, x1, y1: Integer;
- //swapped: Boolean = false; // true: xd is yd, and vice versa
- // horizontal walker
- {$IFDEF GRID_USE_ORTHO_ACCEL}
- wklen, wkstep: Integer;
- //wksign: Integer;
- hopt: Boolean;
- {$ENDIF}
- // skipper
- xdist, ydist: Integer;
+ 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 := Default(ITP);
- lastObj := Default(ITP);
+ log := false;
+ result := Iter.Create(framePool);
tagmask := tagmask and TagFullMask;
- ex := ax1; // why not?
- ey := ay1; // why not?
- if (tagmask = 0) then exit;
-
- if (ax0 = ax1) and (ay0 = ay1) then
- begin
- result := forEachAtPoint(ax0, ay0, nil, tagmask, @ptag);
- if (result <> nil) then
- begin
- if assigned(cb) and not cb(result, ptag, ax0, ay0, ax0, ay0) then result := Default(ITP);
- end;
- exit;
- end;
-
- lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1;
+ if (tagmask = 0) then begin result.finishIt(); exit; end;
gw := mWidth;
gh := mHeight;
minx := mMinX;
miny := mMinY;
- maxx := gw*tsize-1;
- maxy := gh*tsize-1;
-
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format('TRACING: (%d,%d)-(%d,%d) [(%d,%d)-(%d,%d)]; maxdistsq=%d', [ax0, ay0, ax1, ay1, minx, miny, maxx, maxy, lastDistSq]), MSG_NOTIFY);
- {$ENDIF}
-
- 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;
+ // make query coords (0,0)-based
+ x0 := ax0-minx;
+ y0 := ay0-miny;
+ x1 := ax1-minx;
+ y1 := ay1-miny;
- dsx := x1-x0;
- dsy := y1-y0;
+ 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
- if (dsx < dsy) then
- begin
- //swapped := true;
- xptr := @yd;
- yptr := @xd;
- swapInt(x0, y0);
- swapInt(x1, y1);
- swapInt(dsx, dsy);
- swapInt(wx0, wy0);
- swapInt(wx1, wy1);
- swapInt(stx, sty);
- end
- else
+ // increase query counter
+ Inc(mLastQuery);
+ if (mLastQuery = 0) then
begin
- xptr := @xd;
- yptr := @yd;
+ // just in case of overflow
+ mLastQuery := 1;
+ for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0;
end;
+ lq := mLastQuery;
- 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
+ repeat
+ lw.getXY(cx, cy);
+ // check tile
+ ccidx := mGrid[(cy div mTileSize)*gw+(cx div mTileSize)];
+ // process cells
+ while (ccidx <> -1) do
begin
- yd := wy0;
- e -= rem+dsx;
- if (rem > 0) then begin Inc(xd); e += dy2; end;
- xfixed := true;
+ 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;
- end;
-
- if (not xfixed) and (x0 < wx0) then
- begin
- // clip at left
- temp := dy2*(wx0-x0);
- yd += temp div dx2;
- rem := temp mod dx2;
- if (yd > wy1) or (yd = wy1) and (rem >= dsx) then exit;
- xd := wx0;
- e += rem;
- if (rem >= dsx) then begin Inc(yd); e -= dx2; end;
- end;
-
- if (y1 > wy1) then
- begin
- // clip at bottom
- temp := dx2*(wy1-y0)+dsx;
- term := x0+temp div dy2;
- rem := temp mod dy2;
- if (rem = 0) then Dec(term);
- end;
-
- if (term > wx1) then term := wx1; // clip at right
-
- Inc(term); // draw last point
- //if (term = xd) then exit; // this is the only point, get out of here
-
- if (sty = -1) then yd := -yd;
- if (stx = -1) then begin xd := -xd; term := -term; end;
- dx2 -= dy2;
-
- // first move, to skip starting point
- // DON'T DO THIS! loop will take care of that
- if (xd = term) then
- begin
- //FIXME!
- result := forEachAtPoint(ax0, ay0, nil, tagmask, @ptag);
- if (result <> nil) then
- begin
- if assigned(cb) then
- begin
- if cb(result, ptag, ax0, ay0, ax0, ay0) then
- begin
- ex := ax0;
- ey := ay0;
- end
- else
- begin
- result := nil;
- end;
- end
- else
- begin
- ex := ax0;
- ey := ay0;
- end;
- end;
- exit;
- end;
-
- 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;
- *)
-
- {$IF DEFINED(D2F_DEBUG)}
- if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ >= gh*tsize) then raise Exception.Create('raycaster internal error (0)');
- {$ENDIF}
- // DON'T DO THIS! loop will take care of that
- //lastGA := (yptr^ div tsize)*gw+(xptr^ div tsize);
- //ccidx := mGrid[lastGA];
-
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- //if assigned(dbgRayTraceTileHitCB) then e_WriteLog('1:TRACING!', MSG_NOTIFY);
- {$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);
-
- if mInQuery then raise Exception.Create('recursive queries aren''t supported');
- mInQuery := true;
-
- // increase query counter
- Inc(mLastQuery);
- if (mLastQuery = 0) then
- begin
- // just in case of overflow
- mLastQuery := 1;
- for f := 0 to High(mProxies) do mProxies[f].mQueryMark := 0;
- end;
- lq := mLastQuery;
-
- {$IFDEF GRID_USE_ORTHO_ACCEL}
- // if this is strict horizontal/vertical trace, use optimized codepath
- if (ax0 = ax1) or (ay0 = ay1) then
- begin
- // horizontal trace: walk the whole tiles, calculating mindist once for each proxy in cell
- // stx < 0: going left, otherwise `stx` is > 0, and we're going right
- // vertical trace: walk the whole tiles, calculating mindist once for each proxy in cell
- // stx < 0: going up, otherwise `stx` is > 0, and we're going down
- hopt := (ay0 = ay1); // horizontal?
- if (stx < 0) then begin {wksign := -1;} wklen := -(term-xd); end else begin {wksign := 1;} wklen := term-xd; end;
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln('optimized htrace; wklen=%d', [wklen]);
- {$ENDIF}
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- // one of those will never change
- x := xptr^+minx;
- y := yptr^+miny;
- while (wklen > 0) do
- begin
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' htrace; ga=%d; x=%d, y=%d; y=%d; y=%d', [ga, xptr^+minx, yptr^+miny, y, ay0]);
- {$ENDIF}
- // new tile?
- if (ga <> lastGA) then
- begin
- lastGA := ga;
- ccidx := mGrid[lastGA];
- // convert coords to map (to avoid ajdusting coords inside the loop)
- if hopt then x := xptr^+minx else y := yptr^+miny;
- while (ccidx <> -1) do
- begin
- cc := @mCells[ccidx];
- for f := 0 to GridCellBucketSize-1 do
- begin
- if (cc.bodies[f] = -1) then break;
- px := @mProxies[cc.bodies[f]];
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) and
- // constant coord should be inside
- ((hopt and (y >= px.y0) and (y <= px.y1)) or
- ((not hopt) and (x >= px.x0) and (x <= px.x1))) then
- begin
- px.mQueryMark := lq; // mark as processed
- // inside the proxy?
- if (hopt and (x > px.x0) and (x < px.x1)) or
- ((not hopt) and (y > px.y0) and (y < px.y1)) then
- begin
- // setup prev[xy]
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag, x, y, x, y) then
- begin
- result := px.mObj;
- ex := x;
- ey := y;
- mInQuery := false;
- exit;
- end;
- end
- else
- begin
- distSq := distanceSq(ax0, ay0, x, y);
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' EMBEDDED hhit(%d): a=(%d,%d), h=(%d,%d), distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, distSq, lastDistSq]);
- {$ENDIF}
- if (distSq < lastDistSq) then
- begin
- ex := x;
- ey := y;
- result := px.mObj;
- mInQuery := false;
- exit;
- end;
- end;
- continue;
- end;
- // remember this hitpoint if it is nearer than an old one
- // setup prev[xy]
- if hopt then
- begin
- // horizontal trace
- prevy := y;
- y := yptr^+miny;
- if (stx < 0) then
- begin
- // going left
- if (x < px.x1) then continue; // not on the right edge
- x := px.x1;
- prevx := x+1;
- end
- else
- begin
- // going right
- if (x > px.x0) then continue; // not on the left edge
- x := px.x0;
- prevx := x-1;
- end;
- end
- else
- begin
- // vertical trace
- prevx := x;
- x := xptr^+minx;
- if (stx < 0) then
- begin
- // going up
- if (y < px.y1) then continue; // not on the bottom edge
- y := px.y1;
- prevy := x+1;
- end
- else
- begin
- // going down
- if (y > px.y0) then continue; // not on the top edge
- y := px.y0;
- prevy := y-1;
- end;
- end;
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag, x, y, prevx, prevy) then
- begin
- result := px.mObj;
- ex := prevx;
- ey := prevy;
- mInQuery := false;
- exit;
- end;
- end
- else
- begin
- distSq := distanceSq(ax0, ay0, prevx, prevy);
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' hhit(%d): a=(%d,%d), h=(%d,%d), p=(%d,%d), distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, prevx, prevy, distSq, lastDistSq]);
- {$ENDIF}
- if (distSq < lastDistSq) then
- begin
- wasHit := true;
- lastDistSq := distSq;
- ex := prevx;
- ey := prevy;
- lastObj := px.mObj;
- end;
- end;
- end;
- end;
- // next cell
- ccidx := cc.next;
- end;
- if wasHit and not assigned(cb) then begin result := lastObj; mInQuery := false; exit; end;
- if assigned(cb) and cb(nil, 0, x, y, x, y) then begin result := lastObj; mInQuery := false; exit; end;
- end;
- // skip to next tile
- if hopt then
- begin
- if (stx > 0) then
- begin
- // to the right
- wkstep := ((xptr^ or (mTileSize-1))+1)-xptr^;
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' right step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Inc(xptr^, wkstep);
- Inc(ga);
- end
- else
- begin
- // to the left
- wkstep := xptr^-((xptr^ and (not (mTileSize-1)))-1);
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' left step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Dec(xptr^, wkstep);
- Dec(ga);
- end;
- end
- else
- begin
- if (stx > 0) then
- begin
- // to the down
- wkstep := ((yptr^ or (mTileSize-1))+1)-yptr^;
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' down step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Inc(yptr^, wkstep);
- Inc(ga, mWidth);
- end
- else
- begin
- // to the up
- wkstep := yptr^-((yptr^ and (not (mTileSize-1)))-1);
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' up step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Dec(yptr^, wkstep);
- Dec(ga, mWidth);
- end;
- end;
- Dec(wklen, wkstep);
- end;
- // we can travel less than one cell
- if wasHit and not assigned(cb) then result := lastObj else begin ex := ax1; ey := ay1; end;
- mInQuery := false;
- exit;
- end;
- {$ENDIF}
-
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
- {$ENDIF}
-
- //e_LogWritefln('*********************', []);
- ccidx := -1;
- // can omit checks
- while (xd <> term) do
- begin
- // check cell(s)
- {$IF DEFINED(D2F_DEBUG)}
- if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ >= gh*tsize) then raise Exception.Create('raycaster internal error (0)');
- {$ENDIF}
- // new tile?
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format(' xd=%d; term=%d; gx=%d; gy=%d; ga=%d; lastga=%d', [xd, term, xptr^, yptr^, ga, lastGA]), MSG_NOTIFY);
- {$ENDIF}
- if (ga <> lastGA) then
- begin
- // yes
- {$IF DEFINED(D2F_DEBUG)}
- if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
- {$ENDIF}
- if (ccidx <> -1) then
- begin
- // signal cell completion
- if assigned(cb) then
- begin
- if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; mInQuery := false; exit; end;
- end
- else if wasHit then
- begin
- result := lastObj;
- mInQuery := false;
- 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 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
- // 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 := px.mObj;
- ex := prevx;
- ey := prevy;
- mInQuery := false;
- exit;
- end;
- end
- else
- begin
- // remember this hitpoint if it is nearer than an old one
- distSq := distanceSq(ax0, ay0, prevx, prevy);
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format(' hit(%d): a=(%d,%d), h=(%d,%d), p=(%d,%d); distsq=%d; lastsq=%d', [cc.bodies[f], ax0, ay0, x, y, prevx, prevy, distSq, lastDistSq]), MSG_NOTIFY);
- {$ENDIF}
- 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; mInQuery := false; exit; end;
- end
- else if wasHit then
- begin
- result := lastObj;
- mInQuery := false;
- exit;
- end;
- end;
- end;
- if (ccidx = -1) then
- begin
- // move to cell edge, as we have nothing to trace here anymore
- if (stx < 0) then xdist := xd and (not (mTileSize-1)) else xdist := xd or (mTileSize-1);
- if (sty < 0) then ydist := yd and (not (mTileSize-1)) else ydist := yd or (mTileSize-1);
- //e_LogWritefln('0: swapped=%d; xd=%d; yd=%d; stx=%d; sty=%d; e=%d; dx2=%d; dy2=%d; term=%d; xdist=%d; ydist=%d', [swapped, xd, yd, stx, sty, e, dx2, dy2, term, xdist, ydist]);
- while (xd <> xdist) and (yd <> ydist) do
- begin
- // step
- xd += stx;
- if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
- //e_LogWritefln(' xd=%d; yd=%d', [xd, yd]);
- if (xd = term) then break;
- end;
- //e_LogWritefln('1: swapped=%d; xd=%d; yd=%d; stx=%d; sty=%d; e=%d; dx2=%d; dy2=%d; term=%d; xdist=%d; ydist=%d', [swapped, xd, yd, stx, sty, e, dx2, dy2, term, xdist, ydist]);
- if (xd = term) then break;
- end;
- //putPixel(xptr^, yptr^);
- // move coords
- prevx := xptr^+minx;
- prevy := yptr^+miny;
- if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
- xd += stx;
- end;
- // we can travel less than one cell
- if wasHit and not assigned(cb) then
- begin
- result := lastObj;
- end
- else
- begin
- ex := ax1; // why not?
- ey := ay1; // why not?
- end;
-
- mInQuery := false;
-end;
+ // done processing cells, move to next tile
+ until lw.stepToNextTile();
+ result.finishIt();
+end;
// ////////////////////////////////////////////////////////////////////////// //
-//FIXME! optimize this with real tile walking
-function TBodyGridBase.forEachAlongLine (ax0, ay0, ax1, ay1: Integer; cb: TGridQueryCB; tagmask: Integer=-1; log: Boolean=false): ITP;
-const
- tsize = mTileSize;
+// 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
- 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;
- ccidx, curci: Integer;
- lastGA: Integer = -1;
- ga: Integer;
- gw, gh, minx, miny, maxx, maxy: Integer;
+ gx, gy: Integer;
+ ccidx: Integer;
cc: PGridCell;
px: PBodyProxyRec;
lq: LongWord;
f, ptag: Integer;
- x0, y0, x1, y1: Integer;
- //swapped: Boolean = false; // true: xd is yd, and vice versa
- // horizontal walker
- {$IFDEF GRID_USE_ORTHO_ACCEL}
- wklen, wkstep: Integer;
- //wksign: Integer;
- hopt: Boolean;
- {$ENDIF}
- // skipper
- xdist, ydist: Integer;
+ minu0: Single = 100000.0;
+ u0: Single;
+ cx0, cy0, cx1, cy1: Integer;
+ hitpx: PBodyProxyRec = nil;
begin
- log := false;
result := Default(ITP);
- tagmask := tagmask and TagFullMask;
- if (tagmask = 0) or not assigned(cb) then exit;
-
- if (ax0 = ax1) and (ay0 = ay1) then
- begin
- result := forEachAtPoint(ax0, ay0, cb, tagmask, @ptag);
- exit;
- end;
+ ex := ax0+dx;
+ ey := ay0+dy;
+ if (aw < 1) or (ah < 1) then exit;
- 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;
+ 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);
- // 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;
+ cx0 -= mMinX; cy0 -= mMinY;
+ cx1 -= mMinX; cy1 -= mMinY;
- // 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;
+ if (cx1 < 0) or (cy1 < 0) or (cx0 >= mWidth*mTileSize) or (cy0 >= mHeight*mTileSize) then exit;
- dsx := x1-x0;
- dsy := y1-y0;
-
- if (dsx < dsy) then
- begin
- //swapped := true;
- xptr := @yd;
- yptr := @xd;
- swapInt(x0, y0);
- swapInt(x1, y1);
- swapInt(dsx, dsy);
- swapInt(wx0, wy0);
- swapInt(wx1, wy1);
- swapInt(stx, sty);
- end
- else
- begin
- xptr := @xd;
- yptr := @yd;
- end;
-
- dx2 := 2*dsx;
- dy2 := 2*dsy;
- xd := x0;
- yd := y0;
- e := 2*dsy-dsx;
- term := x1;
-
- xfixed := false;
- if (y0 < wy0) then
- begin
- // clip at top
- temp := dx2*(wy0-y0)-dsx;
- xd += temp div dy2;
- rem := temp mod dy2;
- if (xd > wx1) then exit; // x is moved out of clipping rect, nothing to do
- if (xd+1 >= wx0) then
- begin
- yd := wy0;
- e -= rem+dsx;
- if (rem > 0) then begin Inc(xd); e += dy2; end;
- xfixed := true;
- end;
- end;
-
- if (not xfixed) and (x0 < wx0) then
- begin
- // clip at left
- temp := dy2*(wx0-x0);
- yd += temp div dx2;
- rem := temp mod dx2;
- if (yd > wy1) or (yd = wy1) and (rem >= dsx) then exit;
- xd := wx0;
- e += rem;
- if (rem >= dsx) then begin Inc(yd); e -= dx2; end;
- end;
-
- if (y1 > wy1) then
- begin
- // clip at bottom
- temp := dx2*(wy1-y0)+dsx;
- term := x0+temp div dy2;
- rem := temp mod dy2;
- if (rem = 0) then Dec(term);
- end;
-
- if (term > wx1) then term := wx1; // clip at right
-
- Inc(term); // draw last point
- //if (term = xd) then exit; // this is the only point, get out of here
-
- if (sty = -1) then yd := -yd;
- if (stx = -1) then begin xd := -xd; term := -term; end;
- dx2 -= dy2;
-
- // first move, to skip starting point
- // DON'T DO THIS! loop will take care of that
- if (xd = term) then
- begin
- result := forEachAtPoint(ax0, ay0, cb, tagmask, @ptag);
- exit;
- end;
-
- (*
- // move coords
- if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
- xd += stx;
- // done?
- if (xd = term) then exit;
- *)
-
- {$IF DEFINED(D2F_DEBUG)}
- if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ >= gh*tsize) then raise Exception.Create('raycaster internal error (0)');
- {$ENDIF}
- // DON'T DO THIS! loop will take care of that
- //lastGA := (yptr^ div tsize)*gw+(xptr^ div tsize);
- //ccidx := mGrid[lastGA];
-
- if mInQuery then raise Exception.Create('recursive queries aren''t supported');
- mInQuery := true;
+ 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);
end;
lq := mLastQuery;
- {$IFDEF GRID_USE_ORTHO_ACCEL}
- // if this is strict horizontal/vertical trace, use optimized codepath
- if (ax0 = ax1) or (ay0 = ay1) then
- begin
- // horizontal trace: walk the whole tiles, calculating mindist once for each proxy in cell
- // stx < 0: going left, otherwise `stx` is > 0, and we're going right
- // vertical trace: walk the whole tiles, calculating mindist once for each proxy in cell
- // stx < 0: going up, otherwise `stx` is > 0, and we're going down
- hopt := (ay0 = ay1); // horizontal?
- if (stx < 0) then begin {wksign := -1;} wklen := -(term-xd); end else begin {wksign := 1;} wklen := term-xd; end;
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln('optimized htrace; wklen=%d', [wklen]);
- {$ENDIF}
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- while (wklen > 0) do
- begin
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' htrace; ga=%d; x=%d, y=%d; ay0=%d', [ga, xptr^+minx, yptr^+miny, ay0]);
- {$ENDIF}
- // new tile?
- if (ga <> lastGA) then
- begin
- lastGA := ga;
- ccidx := mGrid[lastGA];
- // convert coords to map (to avoid ajdusting coords inside the loop)
- while (ccidx <> -1) do
- begin
- cc := @mCells[ccidx];
- for f := 0 to GridCellBucketSize-1 do
- begin
- if (cc.bodies[f] = -1) then break;
- px := @mProxies[cc.bodies[f]];
- ptag := px.mTag;
- if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then
- begin
- px.mQueryMark := lq; // mark as processed
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag) then begin result := px.mObj; mInQuery := false; exit; end;
- end
- else
- begin
- result := px.mObj;
- mInQuery := false;
- exit;
- end;
- end;
- end;
- // next cell
- ccidx := cc.next;
- end;
- end;
- // skip to next tile
- if hopt then
- begin
- if (stx > 0) then
- begin
- // to the right
- wkstep := ((xptr^ or (mTileSize-1))+1)-xptr^;
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' right step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Inc(xptr^, wkstep);
- Inc(ga);
- end
- else
- begin
- // to the left
- wkstep := xptr^-((xptr^ and (not (mTileSize-1)))-1);
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' left step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Dec(xptr^, wkstep);
- Dec(ga);
- end;
- end
- else
- begin
- if (stx > 0) then
- begin
- // to the down
- wkstep := ((yptr^ or (mTileSize-1))+1)-yptr^;
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' down step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Inc(yptr^, wkstep);
- Inc(ga, mWidth);
- end
- else
- begin
- // to the up
- wkstep := yptr^-((yptr^ and (not (mTileSize-1)))-1);
- {$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' up step: wklen=%d; wkstep=%d', [wklen, wkstep]);
- {$ENDIF}
- if (wkstep >= wklen) then break;
- Dec(yptr^, wkstep);
- Dec(ga, mWidth);
- end;
- end;
- Dec(wklen, wkstep);
- end;
- mInQuery := false;
- exit;
- end;
- {$ENDIF}
-
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
- {$ENDIF}
-
- ccidx := -1;
- // can omit checks
- while (xd <> term) do
+ for gy := cy0 div mTileSize to cy1 div mTileSize do
begin
- // check cell(s)
- {$IF DEFINED(D2F_DEBUG)}
- if (xptr^ < 0) or (yptr^ < 0) or (xptr^ >= gw*tsize) and (yptr^ >= gh*tsize) then raise Exception.Create('raycaster internal error (0)');
- {$ENDIF}
- // new tile?
- ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- {$IF DEFINED(D2F_DEBUG_RAYTRACE)}
- if assigned(dbgRayTraceTileHitCB) then e_WriteLog(Format(' xd=%d; term=%d; gx=%d; gy=%d; ga=%d; lastga=%d', [xd, term, xptr^, yptr^, ga, lastGA]), MSG_NOTIFY);
- {$ENDIF}
- if (ga <> lastGA) then
+ for gx := cx0 div mTileSize to cx1 div mTileSize do
begin
- // yes
- {$IF DEFINED(D2F_DEBUG)}
- if assigned(dbgRayTraceTileHitCB) then dbgRayTraceTileHitCB((xptr^ div tsize*tsize)+minx, (yptr^ div tsize*tsize)+miny);
- {$ENDIF}
- lastGA := ga;
- ccidx := mGrid[lastGA];
- end;
- // has something to process in this tile?
- if (ccidx <> -1) then
- begin
- // process cell
- curci := ccidx;
- // process cell list
- while (curci <> -1) do
+ ccidx := mGrid[gy*mWidth+gx];
+ while (ccidx <> -1) do
begin
- cc := @mCells[curci];
+ cc := @mCells[ccidx];
for f := 0 to GridCellBucketSize-1 do
begin
if (cc.bodies[f] = -1) then break;
if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) then
begin
px.mQueryMark := lq; // mark as processed
- if assigned(cb) then
- begin
- if cb(px.mObj, ptag) then begin result := px.mObj; mInQuery := false; exit; end;
- end
- else
+ 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;
- mInQuery := false;
- exit;
+ minu0 := u0;
+ if (u0 = 0.0) then
+ begin
+ ex := ax0;
+ ey := ay0;
+ exit;
+ end;
end;
end;
end;
// next cell
- curci := cc.next;
+ ccidx := cc.next;
end;
- // nothing more interesting in this cell
- ccidx := -1;
end;
- // move to cell edge, as we have nothing to trace here anymore
- if (stx < 0) then xdist := xd and (not (mTileSize-1)) else xdist := xd or (mTileSize-1);
- if (sty < 0) then ydist := yd and (not (mTileSize-1)) else ydist := yd or (mTileSize-1);
- //e_LogWritefln('0: swapped=%d; xd=%d; yd=%d; stx=%d; sty=%d; e=%d; dx2=%d; dy2=%d; term=%d; xdist=%d; ydist=%d', [swapped, xd, yd, stx, sty, e, dx2, dy2, term, xdist, ydist]);
- while (xd <> xdist) and (yd <> ydist) do
+ 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
- // step
- xd += stx;
- if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
- //e_LogWritefln(' xd=%d; yd=%d', [xd, yd]);
- if (xd = term) then break;
+ ex := ax0+trunc(dx*minu0);
+ ey := ay0+trunc(dy*minu0);
end;
- //e_LogWritefln('1: swapped=%d; xd=%d; yd=%d; stx=%d; sty=%d; e=%d; dx2=%d; dy2=%d; term=%d; xdist=%d; ydist=%d', [swapped, xd, yd, stx, sty, e, dx2, dy2, term, xdist, ydist]);
- if (xd = term) then break;
- //putPixel(xptr^, yptr^);
- // move coords
- if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
- xd += stx;
end;
-
- mInQuery := false;
end;
+// ////////////////////////////////////////////////////////////////////////// //
{.$DEFINE D2F_DEBUG_OTR}
function TBodyGridBase.traceOrthoRayWhileIn (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): Boolean;
var
{$IF DEFINED(D2F_DEBUG_OTR)}
s: AnsiString = '';
{$ENDIF}
+ it: Iter;
begin
result := false;
ex := ax1;
tagmask := tagmask and TagFullMask;
if (tagmask = 0) then exit;
- if (forEachAtPoint(ax0, ay0, nil, tagmask) = nil) then exit;
+ it := forEachAtPoint(ax0, ay0, tagmask, false, true);
+ if (it.length = 0) then begin it.release(); exit; end;
+ it.release();
minx := mMinX;
miny := mMinY;
else
begin
// down
- while (y0 <= celly1) and (filled[y1-celly0] <> 0) do begin Inc(y0); Inc(ay0); end;
+ while (y0 <= celly1) and (filled[y0-celly0] <> 0) do begin Inc(y0); Inc(ay0); end;
if (ay0 >= ay1) then begin ey := ay1; result := false; exit; end;
if (y0 <= celly1) then begin ey := ay0-1; result := true; exit; end;
end;
end;
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.traceRay (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP;
+var
+ ex, ey: Integer;
+begin
+ result := traceRay(ex, ey, x0, y0, x1, y1, tagmask);
+end;
+
+
+// you are not supposed to understand this
+function TBodyGridBase.traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): ITP;
+var
+ lw: TLineWalker;
+ ccidx: Integer;
+ cc: PGridCell;
+ px: PBodyProxyRec;
+ lq: LongWord;
+ f, ptag: Integer;
+ gw, gh, minx, miny: Integer;
+ x0, y0: Integer;
+ x1, y1: Integer;
+ cx, cy: Integer;
+ px0, py0, px1, py1: Integer;
+ lastDistSq, distSq, hx, hy: Integer;
+ firstCell: Boolean = true;
+ wasHit: Boolean;
+begin
+ result := Default(ITP);
+ tagmask := tagmask and TagFullMask;
+ if (tagmask = 0) then exit;
+
+ gw := mWidth;
+ gh := mHeight;
+ minx := mMinX;
+ miny := mMinY;
+
+ // make query coords (0,0)-based
+ x0 := ax0-minx;
+ y0 := ay0-miny;
+ x1 := ax1-minx;
+ y1 := ay1-miny;
+
+ lw := TLineWalker.Create(0, 0, gw*mTileSize-1, gh*mTileSize-1);
+ if not lw.setup(x0, y0, x1, y1) then exit; // out of screen
+
+ lastDistSq := distanceSq(ax0, ay0, ax1, ay1)+1;
+
+ {$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;
+
+
end.