--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trunk/tests/ChipmunkDemos/samples/Query.d	Sat Dec 04 02:02:29 2010 +0100
@@ -0,0 +1,136 @@
+
+// written in the D programming language
+
+module samples.Query;
+
+import chipmunkd.chipmunk;
+
+import samples.ChipmunkDemo;
+import gameApp;
+
+import std.math;
+
+//extern cpVect			mousePos;
+
+static cpSpace *space;
+
+static cpShape *querySeg = null;
+
+
+static void
+update(int ticks)
+{
+	//messageString[0] = '\0';
+	
+	cpVect start = cpvzero;
+	cpVect end = /*cpv(0, 85);//*/mousePos;
+	cpVect lineEnd = end;
+	
+	//{
+	//	char infoString[1024];
+	//	sprintf(infoString, "Query: Dist(%f) Point%s, ", cpvdist(start, end), cpvstr(end));
+	//	strcat(messageString, infoString);
+	//}
+	
+	cpSegmentQueryInfo info = {};
+	if(cpSpaceSegmentQueryFirst(space, start, end, CP_ALL_LAYERS, CP_NO_GROUP, &info)){
+		cpVect point = cpSegmentQueryHitPoint(start, end, info);
+		lineEnd = cpvadd(point, cpvzero);//cpvmult(info.n, 4.0f));
+		
+		//char infoString[1024];
+		//sprintf(infoString, "Segment Query: Dist(%f) Normal%s", cpSegmentQueryHitDist(start, end, info), cpvstr(info.n));
+		//strcat(messageString, infoString);
+	} else {
+		//strcat(messageString, "Segment Query (None)");
+	}
+	
+	cpSegmentShapeSetEndpoints(querySeg, start, lineEnd);
+	cpShapeCacheBB(querySeg); // force it to update it's collision detection data so it will draw
+	
+	// normal other stuff.
+	int steps = 1;
+	cpFloat dt = 1.0f/60.0f/cast(cpFloat)steps;
+	
+	for(int i=0; i<steps; i++){
+		cpSpaceStep(space, dt);
+	}
+}
+
+static cpSpace *
+init()
+{
+	cpResetShapeIdCounter();
+	
+	space = cpSpaceNew();
+	space.elasticIterations = 0;
+	space.iterations = 5;
+
+	cpSpaceResizeStaticHash(space, 40.0f, 999);
+	cpSpaceResizeActiveHash(space, 30.0f, 2999);
+
+	cpBody *staticBody = &space.staticBody;
+	cpShape *shape;
+	
+	// add a non-collidable segment as a quick and dirty way to draw the query line
+	shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpvzero, cpv(100.0f, 0.0f), 4.0f));
+	shape.layers = 0;
+	querySeg = shape;
+	
+	{ // add a fat segment
+		cpFloat mass = 1.0f;
+		cpFloat length = 100.0f;
+		cpVect a = cpv(-length/2.0f, 0.0f), b = cpv(length/2.0f, 0.0f);
+		
+		cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForSegment(mass, a, b)));
+		_body.p = cpv(0.0f, 100.0f);
+		
+		cpSpaceAddShape(space, cpSegmentShapeNew(_body, a, b, 20.0f));
+	}
+	
+	{ // add a static segment
+		cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(0, 300), cpv(300, 0), 0.0f));
+	}
+	
+	{ // add a pentagon
+		cpFloat mass = 1.0f;
+		const int NUM_VERTS = 5;
+		
+		cpVect verts[NUM_VERTS];
+		for(int i=0; i<NUM_VERTS; i++){
+			cpFloat angle = -2*PI*i/(cast(cpFloat) NUM_VERTS);
+			verts[i] = cpv(30*cos(angle), 30*sin(angle));
+		}
+		
+		cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, NUM_VERTS, verts.ptr, cpvzero)));
+		_body.p = cpv(50.0f, 50.0f);
+		
+		cpSpaceAddShape(space, cpPolyShapeNew(_body, NUM_VERTS, verts.ptr, cpvzero));
+	}
+	
+	{ // add a circle
+		cpFloat mass = 1.0f;
+		cpFloat r = 20.0f;
+		
+		cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForCircle(mass, 0.0f, r, cpvzero)));
+		_body.p = cpv(100.0f, 100.0f);
+		
+		cpSpaceAddShape(space, cpCircleShapeNew(_body, r, cpvzero));
+	}
+	
+	return space;
+}
+
+static void
+destroy()
+{
+	cpSpaceFreeChildren(space);
+	cpSpaceFree(space);
+}
+
+chipmunkDemo Query = {
+	"Segment Query",
+	null,
+	&init,
+	&update,
+	&destroy,
+};