public override void Draw()
{
if (Texture == null)
{
return;
}
// For billboarding
Shader.SetGlobalProperty("g_InverseViewMatrix", InverseViewMatrix);
// Taken from DrawNode3D, since we don't need the world transform for particle systems
GLWrapper.SetBlend(Blending);
Shader.Bind();
// Force create a separate batch so we can use instanced rendering
if (particleInstancedBatch == null)
{
particleInstancedBatch = new QuadBatch <TexturedVertex2D>(TexturedVertex2D.Stride * 4, 1);
}
var colourInfo = new ColourInfo {
Colour = Color4.White
};
Texture.DrawQuad(new Quad(-0.5f, -0.5f, 1.0f, 1.0f), colourInfo, vertexAction: v => particleInstancedBatch.Add(v));
// Set GPU buffer data
Buffer.SetData(BufferData);
Buffer.Bind();
// Render instanced
particleInstancedBatch.DrawInstanced(InstanceCount);
Shader.Unbind();
}