//! Drawable:: Draw one occurrence
void BillboardParticles::drawOccurrence(SceneRenderer & renderer, SceneNode & node)
{
Mat4 model_view = node.getScene().getCamera().getTransform() * node.getCachedTransformRef();
Mat4 model_view_projection = node.getScene().getCamera().getProjection() * model_view;
renderer.getProgram().setParamMat4("model_view_projection_matrix", model_view_projection);
renderer.getProgram().setVertexData(vbo.get(), current_node * sizeof(VertexTemplate) * particle_count * 4);
renderer.drawElements(GL_TRIANGLE_STRIP, particle_count * 6, ibo);
current_node++;
}
