Added collision files.

include/Engine/Core/Collision.h

@@ -0,0 +1,9 @@
+#ifndef Collision_h__
+#define Collision_h__
+
+namespace Collision
+{
+//bool RayAABBIntr(float3 origin, float3 direction, float3 center, float3 h);
+}
+
+#endif

src/Engine/Core/Collision.cpp

@@ -0,0 +1,27 @@
+
+namespace Collision
+{
+
+/*bool RayAABBIntr(float3 origin, float3 direction, float3 center, float3 h)
+{
+float3 w = 75.0f * direction;
+float3 v = abs(w);
+float3 c = origin - center + w;
+
+//This is better if we hit often, do comparisons simultanously.
+//if (any(abs(c) > v + h))
+//	return false;
+//
+//return !(any(abs(c.yxx*w.zzy - c.zzy*w.yxx) > h.yxx*v.zzy + h.zzy*v.yxx));
+
+//This is better if we miss often, reject test and exit early.
+if (abs(c.x) > v.x + h.x) return false;
+if (abs(c.y) > v.y + h.y) return false;
+if (abs(c.z) > v.z + h.z) return false;
+
+if (abs(c.y*w.z - c.z*w.y) > h.y*v.z + h.z*v.y) return false;
+if (abs(c.x*w.z - c.z*w.x) > h.x*v.z + h.z*v.x) return false;
+return !(abs(c.x*w.y - c.y*w.x) > h.x*v.y + h.y*v.x);
+}*/
+
+}