Method AddAttributeMatrixWithDivisor

Rendering/OpenGL2/vtkOpenGLVertexArrayObject.cxx:358–394

}

bool vtkOpenGLVertexArrayObject::AddAttributeMatrixWithDivisor(vtkShaderProgram* program,
  vtkOpenGLBufferObject* buffer, const std::string& name, int offset, size_t stride,
  int elementType, int elementTupleSize, bool normalize, int divisor, int tupleOffset)
{
  // bind the first row of values
  bool result = this->AddAttributeArrayWithDivisor(
    program, buffer, name, offset, stride, elementType, elementTupleSize, normalize, divisor, true);

  if (!result)
  {
    return result;
  }

  const GLchar* namePtr = static_cast<const GLchar*>(name.c_str());
  VertexAttributes attribs;
  attribs.Index = glGetAttribLocation(this->Internal->HandleProgram, namePtr);

  for (int i = 1; i < elementTupleSize; i++)
  {
    glEnableVertexAttribArray(attribs.Index + i);
    glVertexAttribPointer(attribs.Index + i, elementTupleSize, convertTypeToGL(elementType),
      normalize, static_cast<GLsizei>(stride), BUFFER_OFFSET(offset + tupleOffset * i));
    if (divisor > 0)
    {
#ifdef GL_ES_VERSION_3_0
      glVertexAttribDivisor(attribs.Index + i, 1);
#else
      if (GLAD_GL_ARB_instanced_arrays)
      {
        glVertexAttribDivisorARB(attribs.Index + i, 1);
      }
#endif
    }
  }

  return true;
}

bool vtkOpenGLVertexArrayObject::RemoveAttributeArray(const std::string& name)
{