Function addCube

tutorials/triangle_geometry/triangle_geometry_device.cpp:16–71

adds a cube to the scene */

/* adds a cube to the scene */
unsigned int addCube (RTCScene scene_i)
{
  /* create a triangulated cube with 12 triangles and 8 vertices */
  RTCGeometry mesh = rtcNewGeometry(g_device, RTC_GEOMETRY_TYPE_TRIANGLE);

  /* create face and vertex color arrays */
  data.face_colors = (Vec3fa*) alignedUSMMalloc((12)*sizeof(Vec3fa),16);
  data.vertex_colors = (Vec3fa*) alignedUSMMalloc((8)*sizeof(Vec3fa),16);

  /* set vertices and vertex colors */
  Vertex* vertices = (Vertex*) rtcSetNewGeometryBuffer(mesh,RTC_BUFFER_TYPE_VERTEX,0,RTC_FORMAT_FLOAT3,sizeof(Vertex),8);
  data.vertex_colors[0] = Vec3fa(0,0,0); vertices[0].x = -1; vertices[0].y = -1; vertices[0].z = -1;
  data.vertex_colors[1] = Vec3fa(0,0,1); vertices[1].x = -1; vertices[1].y = -1; vertices[1].z = +1;
  data.vertex_colors[2] = Vec3fa(0,1,0); vertices[2].x = -1; vertices[2].y = +1; vertices[2].z = -1;
  data.vertex_colors[3] = Vec3fa(0,1,1); vertices[3].x = -1; vertices[3].y = +1; vertices[3].z = +1;
  data.vertex_colors[4] = Vec3fa(1,0,0); vertices[4].x = +1; vertices[4].y = -1; vertices[4].z = -1;
  data.vertex_colors[5] = Vec3fa(1,0,1); vertices[5].x = +1; vertices[5].y = -1; vertices[5].z = +1;
  data.vertex_colors[6] = Vec3fa(1,1,0); vertices[6].x = +1; vertices[6].y = +1; vertices[6].z = -1;
  data.vertex_colors[7] = Vec3fa(1,1,1); vertices[7].x = +1; vertices[7].y = +1; vertices[7].z = +1;

  /* set triangles and face colors */
  int tri = 0;
  Triangle* triangles = (Triangle*) rtcSetNewGeometryBuffer(mesh,RTC_BUFFER_TYPE_INDEX,0,RTC_FORMAT_UINT3,sizeof(Triangle),12);

  // left side
  data.face_colors[tri] = Vec3fa(1,0,0); triangles[tri].v0 = 0; triangles[tri].v1 = 1; triangles[tri].v2 = 2; tri++;
  data.face_colors[tri] = Vec3fa(1,0,0); triangles[tri].v0 = 1; triangles[tri].v1 = 3; triangles[tri].v2 = 2; tri++;

  // right side
  data.face_colors[tri] = Vec3fa(0,1,0); triangles[tri].v0 = 4; triangles[tri].v1 = 6; triangles[tri].v2 = 5; tri++;
  data.face_colors[tri] = Vec3fa(0,1,0); triangles[tri].v0 = 5; triangles[tri].v1 = 6; triangles[tri].v2 = 7; tri++;

  // bottom side
  data.face_colors[tri] = Vec3fa(0.5f);  triangles[tri].v0 = 0; triangles[tri].v1 = 4; triangles[tri].v2 = 1; tri++;
  data.face_colors[tri] = Vec3fa(0.5f);  triangles[tri].v0 = 1; triangles[tri].v1 = 4; triangles[tri].v2 = 5; tri++;

  // top side
  data.face_colors[tri] = Vec3fa(1.0f);  triangles[tri].v0 = 2; triangles[tri].v1 = 3; triangles[tri].v2 = 6; tri++;
  data.face_colors[tri] = Vec3fa(1.0f);  triangles[tri].v0 = 3; triangles[tri].v1 = 7; triangles[tri].v2 = 6; tri++;

  // front side
  data.face_colors[tri] = Vec3fa(0,0,1); triangles[tri].v0 = 0; triangles[tri].v1 = 2; triangles[tri].v2 = 4; tri++;
  data.face_colors[tri] = Vec3fa(0,0,1); triangles[tri].v0 = 2; triangles[tri].v1 = 6; triangles[tri].v2 = 4; tri++;

  // back side
  data.face_colors[tri] = Vec3fa(1,1,0); triangles[tri].v0 = 1; triangles[tri].v1 = 5; triangles[tri].v2 = 3; tri++;
  data.face_colors[tri] = Vec3fa(1,1,0); triangles[tri].v0 = 3; triangles[tri].v1 = 5; triangles[tri].v2 = 7; tri++;

  rtcSetGeometryVertexAttributeCount(mesh,1);
  rtcSetSharedGeometryBuffer(mesh,RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE,0,RTC_FORMAT_FLOAT3,data.vertex_colors,0,sizeof(Vec3fa),8);
  
  rtcCommitGeometry(mesh);
  unsigned int geomID = rtcAttachGeometry(scene_i,mesh);
  rtcReleaseGeometry(mesh);
  return geomID;
}

/* adds a ground plane to the scene */