diff --git a/src/game/g_grid.pas b/src/game/g_grid.pas
index b4b0e32795cddfaa38864fa8154c2f260e903328..d7263f36e0c244dedd9a8424e113e41e397e1981 100644 (file)
--- a/src/game/g_grid.pas
+++ b/src/game/g_grid.pas
{.$DEFINE D2F_DEBUG_XXQ}
{.$DEFINE D2F_DEBUG_MOVER}
{$ENDIF}
-{$DEFINE GRID_USE_ORTHO_ACCEL}
+{.$DEFINE GRID_USE_ORTHO_ACCEL}
unit g_grid;
interface
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 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
next: Integer; // in this cell; index in mCells
end;
+ TCellArray = array of TGridCell;
+
TGridInternalCB = function (grida: Integer; bodyId: TBodyProxyId): Boolean of object; // return `true` to stop
private
//mTileSize: Integer;
const mTileSize = GridDefaultTileSize;
+ 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
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;
mProxyFree: TBodyProxyId; // free
mProxyCount: Integer; // currently used
mProxyMaxCount: Integer;
+ mInQuery: Boolean;
public
dbgShowTraceLog: Boolean;
// no callback: return object on the first hit or nil
function forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP;
+ 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
function traceRay (const x0, y0, x1, y1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP; overload;
function traceRay (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; cb: TGridRayQueryCB; tagmask: Integer=-1): ITP;
- //function traceOrthoRayWhileIn (const x0, y0, x1, y1: Integer; tagmask: Integer=-1): ITP; overload;
- //function traceOrthoRayWhileIn (out ex, ey: Integer; const ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): ITP;
+ // 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)
implementation
uses
- SysUtils, e_log, g_console;
+ SysUtils, e_log, g_console, utils;
// ////////////////////////////////////////////////////////////////////////// //
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});
// ////////////////////////////////////////////////////////////////////////// //
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;
end;
+// ////////////////////////////////////////////////////////////////////////// //
+function TBodyGridBase.atCellInPoint (x, y: Integer): TAtPointEnumerator;
+var
+ cidx: 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);
+end;
+
+
// ////////////////////////////////////////////////////////////////////////// //
// no callback: return `true` on the first hit
function TBodyGridBase.forEachAtPoint (x, y: Integer; cb: TGridQueryCB; tagmask: Integer=-1; exittag: PInteger=nil): ITP;
if (x+w <= 0) or (y+h <= 0) then exit;
if (x >= gw*tsize) or (y >= mHeight*tsize) then exit;
+ if mInQuery then raise Exception.Create('recursive queries aren''t supported');
+ mInQuery := true;
+
// increase query counter
Inc(mLastQuery);
if (mLastQuery = 0) then
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; exit; end;
+ 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;
end;
end;
+
+ mInQuery := false;
end;
//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
// one of those will never change
x := xptr^+minx;
y := yptr^+miny;
- //prevx := x;
- //prevy := y;
- {$IF DEFINED(D2F_DEBUG)}
- if hopt then
- begin
- if (y <> ay0) then raise Exception.Create('htrace fatal internal error');
- end
- else
- begin
- if (x <> ax0) then raise Exception.Create('vtrace fatal internal error');
- end;
- {$ENDIF}
while (wklen > 0) do
begin
{$IF DEFINED(D2F_DEBUG)}
ptag := px.mTag;
if ((ptag and TagDisabled) = 0) and ((ptag and tagmask) <> 0) and (px.mQueryMark <> lq) and
// constant coord should be inside
- ((hopt and (y >= px.mY) and (y < px.mY+px.mHeight)) or
- ((not hopt) and (x >= px.mX) and (x < px.mX+px.mWidth))) then
+ ((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.mX) and (x < px.mX+px.mWidth-1)) or
- ((not hopt) and (y > px.mY) and (y < px.mY+px.mHeight-1)) then
+ 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
result := px.mObj;
ex := x;
ey := y;
+ mInQuery := false;
exit;
end;
end
ex := x;
ey := y;
result := px.mObj;
+ mInQuery := false;
exit;
end;
end;
if (stx < 0) then
begin
// going left
- if (x < px.mX+px.mWidth-1) then continue; // not on the right edge
- prevx := px.mX+px.mWidth;
- x := prevx-1;
+ 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.mX) then continue; // not on the left edge
- prevx := px.mX-1;
- x := prevx+1;
+ if (x > px.x0) then continue; // not on the left edge
+ x := px.x0;
+ prevx := x-1;
end;
end
else
if (stx < 0) then
begin
// going up
- if (y < px.mY+px.mHeight-1) then continue; // not on the bottom edge
- prevy := px.mY+px.mHeight;
- y := prevy-1;
+ 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.mY) then continue; // not on the top edge
- prevy := px.mY-1;
- y := prevy+1;
+ if (y > px.y0) then continue; // not on the top edge
+ y := px.y0;
+ prevy := y-1;
end;
end;
if assigned(cb) then
result := px.mObj;
ex := prevx;
ey := prevy;
+ mInQuery := false;
exit;
end;
end
// next cell
ccidx := cc.next;
end;
- if wasHit and not assigned(cb) then begin result := lastObj; exit; end;
- if assigned(cb) and cb(nil, 0, x, y, x, y) then begin result := lastObj; exit; 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
{$ENDIF}
if (wkstep >= wklen) then break;
Inc(yptr^, wkstep);
- Inc(ga, mHeight);
+ Inc(ga, mWidth);
end
else
begin
{$ENDIF}
if (wkstep >= wklen) then break;
Dec(yptr^, wkstep);
- Dec(ga, mHeight);
+ 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;
{$ENDIF}
// signal cell completion
if assigned(cb) then
begin
- if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; exit; end;
+ if cb(nil, 0, xptr^+minx, yptr^+miny, prevx, prevy) then begin result := lastObj; mInQuery := false; exit; end;
end
else if wasHit then
begin
result := lastObj;
+ mInQuery := false;
exit;
end;
end;
result := px.mObj;
ex := prevx;
ey := prevy;
+ mInQuery := false;
exit;
end;
end
ccidx := -1;
if assigned(cb) then
begin
- if cb(nil, 0, x, y, prevx, prevy) then begin result := lastObj; exit; end;
+ if cb(nil, 0, x, y, prevx, prevy) then begin result := lastObj; mInQuery := false; exit; end;
end
else if wasHit then
begin
result := lastObj;
+ mInQuery := false;
exit;
end;
end;
ex := ax1; // why not?
ey := ay1; // why not?
end;
+
+ mInQuery := false;
end;
temp: Integer;
ccidx, curci: Integer;
lastGA: Integer = -1;
- ga, x, y: Integer;
+ ga: Integer;
gw, gh, minx, miny, maxx, maxy: Integer;
cc: PGridCell;
px: PBodyProxyRec;
//lastGA := (yptr^ div tsize)*gw+(xptr^ div tsize);
//ccidx := mGrid[lastGA];
+ if mInQuery then raise Exception.Create('recursive queries aren''t supported');
+ mInQuery := true;
+
// increase query counter
Inc(mLastQuery);
if (mLastQuery = 0) then
if dbgShowTraceLog then e_LogWritefln('optimized htrace; wklen=%d', [wklen]);
{$ENDIF}
ga := (yptr^ div tsize)*gw+(xptr^ div tsize);
- // one of those will never change
- x := xptr^+minx;
- y := yptr^+miny;
- {$IF DEFINED(D2F_DEBUG)}
- if hopt then
- begin
- if (y <> ay0) then raise Exception.Create('htrace fatal internal error');
- end
- else
- begin
- if (x <> ax0) then raise Exception.Create('vtrace fatal internal error');
- end;
- {$ENDIF}
while (wklen > 0) do
begin
{$IF DEFINED(D2F_DEBUG)}
- if dbgShowTraceLog then e_LogWritefln(' htrace; ga=%d; x=%d, y=%d; y=%d; y=%d', [ga, xptr^+minx, yptr^+miny, y, ay0]);
+ if dbgShowTraceLog then e_LogWritefln(' htrace; ga=%d; x=%d, y=%d; ay0=%d', [ga, xptr^+minx, yptr^+miny, ay0]);
{$ENDIF}
// new tile?
if (ga <> lastGA) then
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];
px.mQueryMark := lq; // mark as processed
if assigned(cb) then
begin
- if cb(px.mObj, ptag) then begin result := px.mObj; exit; end;
+ 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;
{$ENDIF}
if (wkstep >= wklen) then break;
Inc(yptr^, wkstep);
- Inc(ga, mHeight);
+ Inc(ga, mWidth);
end
else
begin
{$ENDIF}
if (wkstep >= wklen) then break;
Dec(yptr^, wkstep);
- Dec(ga, mHeight);
+ Dec(ga, mWidth);
end;
end;
Dec(wklen, wkstep);
end;
+ mInQuery := false;
exit;
end;
{$ENDIF}
begin
// process cell
curci := ccidx;
- // convert coords to map (to avoid ajdusting coords inside the loop)
- x := xptr^+minx;
- y := yptr^+miny;
// process cell list
while (curci <> -1) do
begin
px.mQueryMark := lq; // mark as processed
if assigned(cb) then
begin
- if cb(px.mObj, ptag) then begin result := px.mObj; exit; end;
+ if cb(px.mObj, ptag) then begin result := px.mObj; mInQuery := false; exit; end;
end
else
begin
result := px.mObj;
+ mInQuery := false;
exit;
end;
end;
if (e >= 0) then begin yd += sty; e -= dx2; end else e += dy2;
xd += stx;
end;
+
+ mInQuery := false;
+end;
+
+
+{.$DEFINE D2F_DEBUG_OTR}
+function TBodyGridBase.traceOrthoRayWhileIn (out ex, ey: Integer; ax0, ay0, ax1, ay1: Integer; tagmask: Integer=-1): Boolean;
+var
+ 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}
+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;
+
+ if (forEachAtPoint(ax0, ay0, nil, tagmask) = nil) then exit;
+
+ 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
+ // 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;
+ // check tile
+ while true do
+ begin
+ 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[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
+ (ax0 >= px.x0) and (ax0 <= px.x1) then
+ begin
+ // 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;
+ // next cell
+ ccidx := cc.next;
+ end;
+ {$IF DEFINED(D2F_DEBUG_OTR)}
+ s := formatstrf(' x=%s; ay0=%s; ay1=%s; y0=%s; celly0=%s; celly1=%s; dy=%s; [', [ax0, ay0, ay1, y0, celly0, celly1, dy]);
+ for f := 0 to High(filled) do if (filled[f] <> 0) then s += '1' else s += '0';
+ s += ']';
+ e_LogWriteln(s);
+ {$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
+ // 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;
+ end;
+ end
+ else
+ begin
+ // horizontal
+ assert(false);
+ end;
end;