public void Draw(DrawState state)
{
if (directionId == -1)
{
directionId = state.GetShaderAttributeNameUniqueID("sampleDirection");
texutreId = state.GetShaderAttributeNameUniqueID("Texture");
}
drawable.Shader.SetAttribute(state, directionId, ref direction);
drawable.Shader.SetTexture(state, texutreId, source.GetTexture());
drawable.Draw(state);
}
//draw the element on screen
public void Draw(DrawState state)
{
//the ShaderElement class automatically calls the shader Bind() method
element.Draw(state);
}
