Function addPoints

tutorials/point_geometry/point_geometry_device.cpp:19–59

add point geometry */

/* add point geometry */
void addPoints (RTCScene scene, RTCGeometryType gtype, const Vec3fa& pos)
{
  RandomSampler rng;
  RandomSampler_init(rng, 42);

#define COORD RandomSampler_get1D(rng) * 4.f - 2.f
#define RADIUS RandomSampler_get1D(rng) * 0.13f + 0.02f
#define COLOR RandomSampler_get1D(rng)
#define NORMAL RandomSampler_get1D(rng) * 2.f - 1.f

  RTCGeometry geom = rtcNewGeometry (g_device, gtype);
  Vec4f* point_vertices = (Vec4f*)rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT4, sizeof(Vec4f), NUM_POINTS);

  for (int i = 0; i < NUM_POINTS; i++)
  {
    const float vx = COORD;
    const float vy = COORD;
    const float vz = COORD;
    const float vr = RADIUS;
    point_vertices[i] = Vec4f(pos.x,pos.y,pos.z,0.0f) + Vec4f(vx, vy, vz, vr);
    const float cr = COLOR;
    const float cg = COLOR;
    const float cb = COLOR;
    data.point_colors[i] = Vec3fa(cr,cg,cb);
  }

  if (gtype == RTC_GEOMETRY_TYPE_ORIENTED_DISC_POINT) {
    Vec3fa* point_normals = (Vec3fa*)rtcSetNewGeometryBuffer(geom,RTC_BUFFER_TYPE_NORMAL, 0, RTC_FORMAT_FLOAT3, sizeof(Vec3fa), NUM_POINTS);
    for (int i = 0; i < NUM_POINTS; i++) {
      const float nx = NORMAL;
      const float ny = NORMAL;
      const float nz = NORMAL;
      point_normals[i] = Vec3fa(nx,ny,nz);
      point_normals[i] = normalize(point_normals[i]);
    }
  }

  rtcCommitGeometry(geom);
  rtcAttachGeometry(scene,geom);
  rtcReleaseGeometry(geom);
}

/* adds a ground plane to the scene */
unsigned int addGroundPlane (RTCScene scene_i)