Function createPlane

tutorials/closest_point/closest_point_device.cpp:460–495

}

TriangleMesh* createPlane (
  AffineSpace3fa const& M, // transformation
  unsigned int R)          // resolution
{
  /* create triangle mesh */
  TriangleMesh* plane = new TriangleMesh();
  plane->num_vertices = (R+1)*(R+1);
  plane->num_triangles = 2*R*R;
  plane->vertices = (Vertex*) alignedMalloc(sizeof(Vertex)*plane->num_vertices+1, 16);
  plane->triangles = (Triangle*) alignedMalloc(sizeof(Triangle)*plane->num_triangles, 16);

  /* set vertices and vertex colors */
  for (unsigned int y = 0; y <= R; ++y)
  for (unsigned int x = 0; x <= R; ++x)
  {
    Vec3fa p((float)x/R, (float)y/R, 0.f);
    Vec3fa pt = xfmPoint(M, p);
    plane->vertices[y*(R+1)+x].x = pt.x;
    plane->vertices[y*(R+1)+x].y = pt.y;
    plane->vertices[y*(R+1)+x].z = pt.z;
  }

  /* set triangles and face colors */
  for (unsigned int j = 0; j < R; ++j)
  for (unsigned int i = 0; i < R; ++i)
  {
    plane->triangles[2*(j*R+i)+0].v0 = (j*(R+1)+i);
    plane->triangles[2*(j*R+i)+0].v1 = (j*(R+1)+i) + (R + 1) + 1;
    plane->triangles[2*(j*R+i)+0].v2 = (j*(R+1)+i) + (R + 1);
    plane->triangles[2*(j*R+i)+1].v0 = (j*(R+1)+i);
    plane->triangles[2*(j*R+i)+1].v1 = (j*(R+1)+i) + 1;
    plane->triangles[2*(j*R+i)+1].v2 = (j*(R+1)+i) + (R + 1) + 1;
  }

  return plane;
}


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