//this file is autogenerated using stringify.bat (premake --stringify) in the build folder of this project
static const char* rayCastKernelCL= \
"\n"
"#define SHAPE_CONVEX_HULL 3\n"
"#define SHAPE_PLANE 4\n"
"#define SHAPE_CONCAVE_TRIMESH 5\n"
"#define SHAPE_COMPOUND_OF_CONVEX_HULLS 6\n"
"#define SHAPE_SPHERE 7\n"
"\n"
"\n"
"typedef struct\n"
"{\n"
"	float4 m_from;\n"
"	float4 m_to;\n"
"} b3RayInfo;\n"
"\n"
"typedef struct\n"
"{\n"
"		float m_hitFraction;\n"
"		int	m_hitResult0;\n"
"		int	m_hitResult1;\n"
"		int	m_hitResult2;\n"
"		float4	m_hitPoint;\n"
"		float4	m_hitNormal;\n"
"} b3RayHit;\n"
"\n"
"typedef struct\n"
"{\n"
"	float4 m_pos;\n"
"	float4 m_quat;\n"
"	float4 m_linVel;\n"
"	float4 m_angVel;\n"
"\n"
"	unsigned int m_collidableIdx;\n"
"	float m_invMass;\n"
"	float m_restituitionCoeff;\n"
"	float m_frictionCoeff;\n"
"} Body;\n"
"\n"
"typedef struct Collidable\n"
"{\n"
"	union {\n"
"		int m_numChildShapes;\n"
"		int m_bvhIndex;\n"
"	};\n"
"	float m_radius;\n"
"	int m_shapeType;\n"
"	int m_shapeIndex;\n"
"} Collidable;\n"
"\n"
"\n"
"\n"
"bool sphere_intersect(float4 spherePos,  float radius, float4 rayFrom, float4 rayTo, float* hitFraction)\n"
"{\n"
"	float4 rs = rayFrom - spherePos;\n"
"	rs.w = 0.f;\n"
"	float4 rayDir = rayTo-rayFrom;\n"
"	rayDir.w = 0.f;\n"
"	float A = dot(rayDir,rayDir);\n"
"	float B = dot(rs, rayDir);\n"
"	float C = dot(rs, rs) - (radius * radius);\n"
"    \n"
"	float D = B * B - A*C;\n"
"\n"
"  if (D > 0.0)\n"
"  {\n"
"     float t = (-B - sqrt(D))/A;\n"
"\n"
"        if ( (t >= 0.0f) && (t < (*hitFraction)) )\n"
"        {\n"
"					*hitFraction = t;\n"
"          return true;\n"
"				}\n"
"	}\n"
"	return false;\n"
"}\n"
"\n"
"float4 setInterpolate3(float4 from, float4 to, float t)\n"
"{\n"
"		float s = 1.0f - t;\n"
"		float4 result;\n"
"		result = s * from + t * to;\n"
"		result.w = 0.f;	\n"
"		return result;	\n"
"}\n"
"\n"
"__kernel void rayCastKernel(  \n"
"	int numRays, \n"
"	const __global b3RayInfo* rays, \n"
"	__global b3RayHit* hitResults, \n"
"	const int numBodies, \n"
"	__global Body* bodies,\n"
"	__global Collidable* collidables)\n"
"{\n"
"\n"
"\n"
"	int i = get_global_id(0);\n"
"	if (i<numRays)\n"
"	{\n"
"		hitResults[i].m_hitFraction = 1.f;\n"
"\n"
"		float4 rayFrom = rays[i].m_from;\n"
"		float4 rayTo = rays[i].m_to;\n"
"		float hitFraction = 1.f;\n"
"		int hitBodyIndex= -1;\n"
"		\n"
"		int cachedCollidableIndex = -1;		\n"
"		Collidable cachedCollidable;\n"
"		\n"
"		for (int b=0;b<numBodies;b++)\n"
"		{\n"
"					\n"
"				float4 pos = bodies[b].m_pos;\n"
"	//		float4 orn = bodies[b].m_quat;\n"
"				if (cachedCollidableIndex !=bodies[b].m_collidableIdx)\n"
"				{\n"
"						cachedCollidableIndex = bodies[b].m_collidableIdx;\n"
"						cachedCollidable = collidables[cachedCollidableIndex];\n"
"				}\n"
"				\n"
"				if (cachedCollidable.m_shapeType == SHAPE_SPHERE)\n"
"				{\n"
"					float radius = cachedCollidable.m_radius;\n"
"		\n"
"					if (sphere_intersect(pos,  radius, rayFrom, rayTo, &hitFraction))\n"
"					{\n"
"						hitBodyIndex = b;\n"
"					}\n"
"				}\n"
"		}\n"
"		\n"
"		if (hitBodyIndex>=0)\n"
"		{\n"
"			hitResults[i].m_hitFraction = hitFraction;\n"
"			hitResults[i].m_hitPoint = setInterpolate3(rayFrom, rayTo,hitFraction);\n"
"			float4 hitNormal = (float4) (hitResults[i].m_hitPoint-bodies[hitBodyIndex].m_pos);\n"
"			hitResults[i].m_hitNormal = normalize(hitNormal);\n"
"			hitResults[i].m_hitResult0 = hitBodyIndex;\n"
"		}\n"
"	}\n"
"}\n"
"\n"
;