Initial community commit

Src/Wasabi/bfc/util/findopenrect.cpp

@@ -0,0 +1,251 @@
+#include <precomp.h>
+#include "findopenrect.h"
+
+#include <bfc/pair.h>
+
+//CUT #define MAXTRIALS 10000	// unless time runs out
+#define MOUSEPENALTY 65536
+
+FindOpenRect::FindOpenRect()
+{
+	timelimit = 100;
+	iters = 0;
+	xdiv = ydiv = 1;
+	fn = compare_overlapArea;
+	userdata = userdata2 = 0;
+	bsfval = bsfdist = 0;
+}
+
+void FindOpenRect::setCompareRectsFn(compareRectsFn _fn)
+{
+	fn = _fn;
+}
+
+RECT FindOpenRect::find(const RECT &vr, const PtrList<RECT> &list, const RECT &prev, unsigned long userdata, unsigned long userdata2)
+{
+	beginFind(vr, list, prev, userdata, userdata2);
+	return findMore();
+}
+
+void FindOpenRect::beginFind(const RECT &viewport, const PtrList<RECT> &_list,
+                             const RECT &_prev, unsigned long _userdata, unsigned long _userdata2)
+{
+	vr = viewport;
+	list.copyFrom(&_list);
+	prev = _prev;
+	userdata = _userdata;
+	userdata2 = _userdata2;
+
+	// reset best rect found so far
+	//CUT  bsf_nooverlap = prev;
+	//CUT  found_nooverlap=0;
+	//CUT  bsf_overlap = prev;
+	//CUT  bsfval_nooverlap = 1e100;
+	//CUT  bsfval_overlap = 1e100;
+	bsfrect = prev;
+	bsfval = 10e10;
+	bsfdist = 10e10;
+
+	//CUT  POINT mousepos;
+	//CUT  Std::getMousePos(&mousepos);
+}
+
+RECT FindOpenRect::findMore()
+{
+	int w = prev.right - prev.left, h = prev.bottom - prev.top;
+	int vw = vr.right - vr.left;
+	int vh = vr.bottom - vr.top;
+
+	if (vw <= w || vh <= h)
+	{
+		DebugStringW(L"findopenrect: window too big for viewport");
+	}
+
+	
+	double started = Wasabi::Std::getTimeStampMS();
+
+	for (int c = 0; /*CUTc < MAXTRIALS*/; c++)
+	{
+
+		// too bad = crashy crash :P love, BU
+		if (c != 0 && (vw <= w || vh <= h))
+			break;
+
+		// set the trial rect
+		RECT tr;
+		if (iters == 0)
+		{	// try prev
+			tr = prev;
+		}
+		else
+		{
+			int x = Wasabi::Std::random32(vw - w) + vr.top;
+			int y = Wasabi::Std::random32(vh - h) + vr.left;
+			if (xdiv != 1) x -= x % xdiv;
+			if (ydiv != 1) y -= y % ydiv;
+			tr = Wasabi::Std::makeRect(x, y, x + w, y + h);
+		}
+
+		// add up the coverage of trial position
+		trySingleRect(tr, TRUE);
+
+		if (timelimit > 0 && c > 0 && (int)((Wasabi::Std::getTimeStampMS() - started)*1000.f) > timelimit)
+		{
+			//      DebugString("FindOpenRect::find() timeout, %d iters", c);
+			break;
+		}
+	}
+
+	return getBestRectSoFar();
+}
+
+typedef Pair<RECT, double> RectV;
+
+namespace
+{
+	class Sorter
+	{
+	public:
+		static int compareItem(RectV *p1, RectV* p2)
+		{
+			return -CMP3(p1->b, p2->b);
+		}
+	};
+};
+
+double FindOpenRect::trySingleRect(const RECT &tr, int early_out)
+{
+#if 0
+	PtrListQuickSorted<RectV, Sorter> candidates(list.getNumItems());
+	foreach(list)
+	double d = compare_overlapArea(tr, *list.getfor());
+	candidates.addItem(new RectV(*list.getfor(), d));
+	endfor
+	candidates.sort();
+#else
+	PtrList<RECT> candidates;
+	candidates.copyFrom(&list);
+#endif
+
+	double trarea = 0;
+
+	foreach(candidates)
+#if 0
+	RECT *wr = &candidates.getfor()->a;
+#else
+	RECT *wr = candidates.getfor();
+#endif 
+	//CUT    double bsf = MIN(found_nooverlap ? 0 : bsfval_nooverlap, bsfval_overlap);
+	trarea += (*fn)(tr, *wr, userdata, userdata2, foreach_index, bsfval);
+
+	// early quit if not breaking any records
+	if (early_out && trarea >= bsfval) break;
+
+	endfor
+
+#if 0
+	candidates.deleteAll();
+#endif
+
+	if (trarea < 0.005) trarea = 0;
+
+#if 0
+	// found one that does not overlap!
+	if (trarea == 0)
+	{
+		if (val < bsfval_nooverlap)
+		{ // if it's closer than prev closest, save it
+			bsf_nooverlap = tr;
+			bsfval_nooverlap = val;
+			found_nooverlap = 1;
+		}
+	}
+	else
+	{
+		if (trarea < bsfval_overlap)
+		{	// overlaps least stuff
+			bsf_overlap = tr;
+			bsfval_overlap = trarea;
+		}
+	}
+#endif
+	if (trarea == 0)
+	{
+		// find the distance from the previous
+		double val = SQRT(SQR(prev.left - tr.left) + SQR(prev.top - tr.top));
+		if (bsfdist > val)
+		{
+			bsfrect = tr;
+			bsfdist = val;
+		}
+	}
+	else
+	{
+		if (trarea < bsfval)
+		{
+			bsfrect = tr;
+			bsfval = trarea;
+		}
+	}
+	iters++;
+	return trarea;
+}
+
+double FindOpenRect::compare_overlapArea(const RECT &rect, const RECT &dest, unsigned long userdata, unsigned long userdata2, int index, double bsf)
+{
+	RECT intersection;
+	if (Wasabi::Std::rectIntersect(rect, dest, &intersection))
+	{
+		intersection.right -= intersection.left;
+		intersection.bottom -= intersection.top;
+		return intersection.right * intersection.bottom;
+	}
+	return 0;
+}
+
+void FindOpenRect::setTimeLimit(int ms)
+{
+	timelimit = ms;
+}
+
+int FindOpenRect::getNumIters()
+{
+	return iters;
+}
+
+void FindOpenRect::resetNumIters()
+{
+	iters = 0;
+}
+
+double FindOpenRect::getBestValSoFar()
+{
+	return (bsfval == 10e10) ? 0 : bsfval;
+}
+
+RECT FindOpenRect::getBestRectSoFar()
+{
+	return bsfrect;
+}
+
+void FindOpenRect::setBestSoFar(double bsf, const RECT &bestrect)
+{
+	if (bsf > 0 && bsfval > bsf)
+	{
+		bsfval = bsf;
+		bsfrect = bestrect;
+		bsfdist = SQRT(SQR(prev.left - bsfrect.left) + SQR(prev.top - bsfrect.top));
+		//CUTDebugString("*******************8 better BSF ****************");
+	}
+}
+
+RECT FindOpenRect::getOriginalRect()
+{
+	return prev;
+}
+
+void FindOpenRect::setCoordDivisor(int _xdiv, int _ydiv)
+{
+	xdiv = MAX(_xdiv, 1);
+	ydiv = MAX(_ydiv, 1);
+}