void PTexMesh::RenderSubMeshDepth()

in ReplicaSDK/ptex/PTexLib.cpp [128:161]

27 lines of code
2 McCabe index (conditional complexity)


void PTexMesh::RenderSubMeshDepth(
    size_t subMesh,
    const pangolin::OpenGlRenderState& cam,
    const float depthScale,
    const Eigen::Vector4f& clipPlane) {
  ASSERT(subMesh < meshes.size());
  Mesh& mesh = *meshes[subMesh];

  glPushAttrib(GL_POLYGON_BIT);
  int currFrontFace;
  glGetIntegerv(GL_FRONT_FACE, &currFrontFace);
  //Drawing the faces has the opposite winding order to the GL_LINES_ADJACENCY
  glFrontFace(currFrontFace == GL_CW ? GL_CCW : GL_CW);

  depthShader.Bind();
  depthShader.SetUniform("MVP", cam.GetProjectionModelViewMatrix());  
  depthShader.SetUniform("MV", cam.GetModelViewMatrix());
  depthShader.SetUniform("clipPlane", clipPlane(0), clipPlane(1), clipPlane(2), clipPlane(3));
  depthShader.SetUniform("scale", depthScale);

  mesh.vbo.Bind();
  glVertexAttribPointer(0, mesh.vbo.count_per_element, mesh.vbo.datatype, GL_FALSE, 0, 0);
  glEnableVertexAttribArray(0);
  mesh.vbo.Unbind();

  mesh.ibo.Bind();
  glDrawElements(GL_QUADS, mesh.ibo.num_elements, mesh.ibo.datatype, 0);
  mesh.ibo.Unbind();
  glDisableVertexAttribArray(0);

  depthShader.Unbind();

  glPopAttrib();
}