move shaders to .glsl files and stringify to .h file.

add crude screenshot facility (using F1 key), it can also be used for debugging
start with shadows using shadowmap, not working yet
add experimental 'ignore' body index in raycast, using b3HitInfo.m_m_hitResult2

Demos3/GpuDemos/raytrace/RaytracedShadowDemo.h

@@ -0,0 +1,33 @@
+#ifndef RAYTRACED_SHADOW_DEMO_H
+#define RAYTRACED_SHADOW_DEMO_H
+
+#include "../rigidbody/GpuConvexScene.h"
+
+class GpuRaytraceScene : public GpuBoxPlaneScene
+{
+protected:
+	b3AlignedObjectArray<b3RayInfo> primaryRays;
+
+	struct GpuRaytraceInternalData* m_raytraceData;
+
+public:
+	GpuRaytraceScene();
+	virtual ~GpuRaytraceScene();
+	virtual const char* getName()
+	{
+		return "GPURaytrace";
+	}
+
+	static GpuDemo* MyCreateFunc()
+	{
+		GpuDemo* demo = new GpuRaytraceScene;
+		return demo;
+	}
+	
+	virtual int	createDynamicsObjects(const ConstructionInfo& ci);
+
+	void renderScene();
+	void renderScene2();
+};
+
+#endif //RAYTRACED_SHADOW_DEMO_H