C++ (Cpp) rtcNewCurveGeometry Examples

Example #1

File: viewer_stream_device.cpp Project: dkoerner/embree

unsigned int convertCurveGeometry(ISPCHairSet* hair, RTCScene scene_out)
{
  unsigned int geomID = rtcNewCurveGeometry (scene_out, RTC_GEOMETRY_STATIC, hair->numHairs, hair->numVertices, hair->v2 ? 2 : 1);
  rtcSetBuffer(scene_out,geomID,RTC_VERTEX_BUFFER,hair->v,0,sizeof(Vertex));
  if (hair->v2) rtcSetBuffer(scene_out,geomID,RTC_VERTEX_BUFFER1,hair->v2,0,sizeof(Vertex));
  rtcSetBuffer(scene_out,geomID,RTC_INDEX_BUFFER,hair->hairs,0,sizeof(ISPCHair));
  return geomID;
}

Example #2

File: curve_geometry_device.cpp Project: ElrosMorlin/embree

/* add hair geometry */
unsigned int addCurve (RTCScene scene, const Vec3fa& pos)
{
  unsigned int geomID = rtcNewCurveGeometry (scene, RTC_GEOMETRY_STATIC, NUM_CURVES, 4*NUM_CURVES);

  /* converts b-spline to bezier basis */
  Vec3fa* vtx = (Vec3fa*) rtcMapBuffer(scene, geomID, RTC_VERTEX_BUFFER);
  for (size_t i=0; i<NUM_CURVES; i++)
  {
    Vec3fa P = Vec3fa(pos.x,pos.y,pos.z,0.0f);
    const Vec3fa v0 = Vec3fa(hair_vertices[i+0][0],hair_vertices[i+0][1],hair_vertices[i+0][2],hair_vertices[i+0][3]);
    const Vec3fa v1 = Vec3fa(hair_vertices[i+1][0],hair_vertices[i+1][1],hair_vertices[i+1][2],hair_vertices[i+1][3]);
    const Vec3fa v2 = Vec3fa(hair_vertices[i+2][0],hair_vertices[i+2][1],hair_vertices[i+2][2],hair_vertices[i+2][3]);
    const Vec3fa v3 = Vec3fa(hair_vertices[i+3][0],hair_vertices[i+3][1],hair_vertices[i+3][2],hair_vertices[i+3][3]);
    vtx[4*i+0] = P + (1.0f/6.0f)*v0 + (2.0f/3.0f)*v1 + (1.0f/6.0f)*v2;
    vtx[4*i+1] = P + (2.0f/3.0f)*v1 + (1.0f/3.0f)*v2;
    vtx[4*i+2] = P + (1.0f/3.0f)*v1 + (2.0f/3.0f)*v2;
    vtx[4*i+3] = P + (1.0f/6.0f)*v1 + (2.0f/3.0f)*v2 + (1.0f/6.0f)*v3;
  }
  rtcUnmapBuffer(scene, geomID, RTC_VERTEX_BUFFER);

  Vec3fa* colors = (Vec3fa*) alignedMalloc(4*NUM_CURVES*sizeof(Vec3fa));
  for (size_t i=0; i<NUM_CURVES; i++)
  {
    const Vec3fa v0 = Vec3fa(hair_vertex_colors[i+0][0],hair_vertex_colors[i+0][1],hair_vertex_colors[i+0][2],hair_vertex_colors[i+0][3]);
    const Vec3fa v1 = Vec3fa(hair_vertex_colors[i+1][0],hair_vertex_colors[i+1][1],hair_vertex_colors[i+1][2],hair_vertex_colors[i+1][3]);
    const Vec3fa v2 = Vec3fa(hair_vertex_colors[i+2][0],hair_vertex_colors[i+2][1],hair_vertex_colors[i+2][2],hair_vertex_colors[i+2][3]);
    const Vec3fa v3 = Vec3fa(hair_vertex_colors[i+3][0],hair_vertex_colors[i+3][1],hair_vertex_colors[i+3][2],hair_vertex_colors[i+3][3]);
    colors[4*i+0] = (1.0f/6.0f)*v0 + (2.0f/3.0f)*v1 + (1.0f/6.0f)*v2;
    colors[4*i+1] = (2.0f/3.0f)*v1 + (1.0f/3.0f)*v2;
    colors[4*i+2] = (1.0f/3.0f)*v1 + (2.0f/3.0f)*v2;
    colors[4*i+3] = (1.0f/6.0f)*v1 + (2.0f/3.0f)*v2 + (1.0f/6.0f)*v3;
  }

  int* index = (int*) rtcMapBuffer(scene, geomID, RTC_INDEX_BUFFER);
  for (int i=0; i<NUM_CURVES; i++) {
    index[i] = 4*i;
  }
  rtcUnmapBuffer(scene,geomID,RTC_INDEX_BUFFER);

  rtcSetBuffer(scene, geomID, RTC_USER_VERTEX_BUFFER0, colors, 0, sizeof(Vec3fa));
  return geomID;
}

Example #3

File: rtcore_ispc.cpp Project: ElrosMorlin/embree

 extern "C" unsigned ispcNewCurveGeometry (RTCScene scene, RTCGeometryFlags flags, size_t numCurves, size_t numVertices, size_t numTimeSteps) {
   return rtcNewCurveGeometry(scene,flags,numCurves,numVertices,numTimeSteps);
 }