private void setupVertexArray(Shader shader)
{
bool initial = currentShader == null;
if (initial)
{
vertexArrayId = GL.GenVertexArray();
}
GL.BindVertexArray(vertexArrayId);
// Vertex
GL.BindBuffer(BufferTarget.ArrayBuffer, vertexBufferId);
if (!initial)
{
vertexDeclaration.DeactivateAttributes(currentShader);
}
vertexDeclaration.ActivateAttributes(shader);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
// Index
if (initial && indexBufferId != -1)
{
GL.BindBuffer(BufferTarget.ElementArrayBuffer, indexBufferId);
}
GL.BindVertexArray(0);
currentShader = shader;
}
protected virtual void internalUnbind()
{
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
vertexDeclaration.DeactivateAttributes(currentShader);
currentShader = null;
}