StencilRendererHandler.java

package openmods.renderer;

import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import net.minecraft.client.renderer.RenderGlobal;
import net.minecraftforge.client.event.RenderWorldLastEvent;
import net.minecraftforge.common.MinecraftForge;

public abstract class StencilRendererHandler {

	public static final StencilRendererHandler DUMMY = new StencilRendererHandler() {
		@Override
		public void render(RenderGlobal context, float partialTickTime) {}
	};

	public abstract void render(RenderGlobal context, float partialTickTime);

	private boolean renderThisTick;

	public StencilRendererHandler() {
		MinecraftForge.EVENT_BUS.register(this);
	}

	public void markForRender() {
		renderThisTick = true;
	}

	@SubscribeEvent
	public void drawStenciledBackground(RenderWorldLastEvent evt) {
		if (!renderThisTick) return;
		renderThisTick = false;

		render(evt.context, evt.partialTicks);
	}
}