Method Bind

Rendering/OpenGL2/vtkOpenGLVertexArrayObject.cxx:142–184

}

void vtkOpenGLVertexArrayObject::Bind()
{
  // Either simply bind the VAO, or emulate behavior by binding all attributes.
  if (!this->Internal->IsReady())
  {
    this->Internal->Initialize();
  }
  if (this->Internal->IsReady() && this->Internal->Supported)
  {
    glBindVertexArray(this->Internal->HandleVAO);
  }
  else if (this->Internal->IsReady())
  {
    Private::AttributeMap::const_iterator it;
    for (it = this->Internal->Attributes.begin(); it != this->Internal->Attributes.end(); ++it)
    {
      std::vector<VertexAttributes>::const_iterator attrIt;
      glBindBuffer(GL_ARRAY_BUFFER, it->first);
      for (attrIt = it->second.begin(); attrIt != it->second.end(); ++attrIt)
      {
        int matrixCount = attrIt->IsMatrix ? attrIt->Size : 1;
        for (int i = 0; i < matrixCount; ++i)
        {
          glEnableVertexAttribArray(attrIt->Index + i);
          glVertexAttribPointer(attrIt->Index + i, attrIt->Size, attrIt->Type, attrIt->Normalize,
            attrIt->Stride, BUFFER_OFFSET(attrIt->Offset + attrIt->Stride * i / attrIt->Size));
          if (attrIt->Divisor > 0)
          {
#ifdef GL_ES_VERSION_3_0
            glVertexAttribDivisor(attrIt->Index + i, 1);
#else
            if (GLAD_GL_ARB_instanced_arrays)
            {
              glVertexAttribDivisorARB(attrIt->Index + i, 1);
            }
#endif
          }
        }
      }
      glBindBuffer(GL_ARRAY_BUFFER, 0);
    }
  }
}

void vtkOpenGLVertexArrayObject::Release()
{