Function addQuadSubdivCube

tutorials/interpolation/interpolation_device.cpp:180–207

adds a subdiv cube to the scene */

/* adds a subdiv cube to the scene */
unsigned int addQuadSubdivCube (RTCScene scene_i, const Vec3fa& pos)
{
  RTCGeometry geom = rtcNewGeometry(g_device, RTC_GEOMETRY_TYPE_SUBDIVISION);

  //rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX, cube_vertices, 0, sizeof(Vec3fa  ), NUM_VERTICES);
  Vec3fa* vtx = (Vec3fa*) rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT3, sizeof(Vec3fa), NUM_VERTICES);
  for (unsigned int i=0; i<NUM_VERTICES; i++) vtx[i] = Vec3fa(cube_vertices[i][0]+pos.x,cube_vertices[i][1]+pos.y,cube_vertices[i][2]+pos.z);

  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT, cube_quad_indices, 0, sizeof(unsigned int), NUM_QUAD_INDICES);
  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_FACE,  0, RTC_FORMAT_UINT, cube_quad_faces,   0, sizeof(unsigned int), NUM_QUAD_FACES);

  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_EDGE_CREASE_INDEX,  0, RTC_FORMAT_UINT2, cube_edge_crease_indices, 0, 2*sizeof(unsigned int), 0);
  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_EDGE_CREASE_WEIGHT, 0, RTC_FORMAT_FLOAT, cube_edge_crease_weights, 0, sizeof(float),          0);

  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX_CREASE_INDEX,  0, RTC_FORMAT_UINT,  cube_vertex_crease_indices, 0, sizeof(unsigned int), 0);
  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX_CREASE_WEIGHT, 0, RTC_FORMAT_FLOAT, cube_vertex_crease_weights, 0, sizeof(float),        0);

  rtcSetGeometryVertexAttributeCount(geom,1);
  rtcSetSharedGeometryBuffer(geom, RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE, 0, RTC_FORMAT_FLOAT3, cube_vertex_colors, 0, sizeof(Vec3fa), NUM_VERTICES);

  float* level = (float*) rtcSetNewGeometryBuffer(geom, RTC_BUFFER_TYPE_LEVEL, 0, RTC_FORMAT_FLOAT, sizeof(float), NUM_QUAD_INDICES);
  for (unsigned int i=0; i<NUM_QUAD_INDICES; i++) level[i] = FIXED_EDGE_TESSELLATION_VALUE;

  rtcCommitGeometry(geom);
  unsigned int geomID = rtcAttachGeometry(scene_i, geom);
  rtcReleaseGeometry(geom);
  return geomID;
}

void setQuadSubdivCubeLevels (RTCGeometry geom, const Vec3fa& cam_pos)
{