unsigned int convertHairSet(ISPCHairSet* hair, RTCScene scene_out)
{
/* if more than a single timestep, mark object as dynamic */
RTCGeometryFlags object_flags = hair->numTimeSteps > 1 ? RTC_GEOMETRY_DYNAMIC : RTC_GEOMETRY_STATIC;
/* create object */
unsigned int geomID = 0;
switch (hair->basis) {
case BEZIER_BASIS : geomID = rtcNewBezierHairGeometry (scene_out, object_flags, hair->numHairs, hair->numVertices, hair->numTimeSteps); break;
case BSPLINE_BASIS: geomID = rtcNewBSplineHairGeometry (scene_out, object_flags, hair->numHairs, hair->numVertices, hair->numTimeSteps); break;
default: assert(false);
}
/* generate vertex buffer */
Vec3fa* vertices = (Vec3fa*) rtcMapBuffer(scene_out,geomID,RTC_VERTEX_BUFFER);
for (size_t i=0;i<hair->numVertices;i++) vertices[i] = hair->positions[0][i];
rtcUnmapBuffer(scene_out, geomID, RTC_VERTEX_BUFFER);
/* set index buffer */
rtcSetBuffer(scene_out,geomID,RTC_INDEX_BUFFER,hair->hairs,0,sizeof(ISPCHair));
rtcSetTessellationRate(scene_out,geomID,(float)hair->tessellation_rate);
return geomID;
}
extern "C" void ispcSetTessellationRate (RTCScene hscene, unsigned geomID, float tessellationRate) {
rtcSetTessellationRate(hscene,geomID,tessellationRate);
}
