/// <summary>Activates the shader program for use</summary>
public void Activate()
{
if (isActive)
{
return;
}
if (renderer.CurrentShader != null)
{
renderer.CurrentShader.isActive = false;
}
GL.UseProgram(handle);
isActive = true;
renderer.lastVAO = -1;
renderer.CurrentShader = this;
renderer.RestoreAlphaFunc();
}
