Function updateEdgeLevel

tutorials/pathtracer/pathtracer_device.cpp:1665–1673

/***************************************************************************************/

inline float updateEdgeLevel( ISPCSubdivMesh* mesh, const Vec3fa& cam_pos, const unsigned int e0, const unsigned int e1)
{
  const Vec3fa v0 = mesh->positions[0][mesh->position_indices[e0]];
  const Vec3fa v1 = mesh->positions[0][mesh->position_indices[e1]];
  const Vec3fa edge = v1-v0;
  const Vec3fa P = 0.5f*(v1+v0);
  const Vec3fa dist = Vec3fa(cam_pos) - P;
  return max(min(LEVEL_FACTOR*(0.5f*length(edge)/length(dist)),MAX_EDGE_LEVEL),MIN_EDGE_LEVEL);
}

void updateEdgeLevelBuffer( ISPCSubdivMesh* mesh, const Vec3fa& cam_pos, unsigned int startID, unsigned int endID )
{