Light-rendering...

package de.Femtopedia.XYCraftRL.client;

import org.lwjgl.opengl.GL11;

import de.Femtopedia.XYCraftRL.TileEntityGlow;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
import net.minecraft.client.renderer.vertex.DefaultVertexFormats;

public class GlowTESR extends TileEntitySpecialRenderer<TileEntityGlow> {
	
	@Override
	public void renderTileEntityAt(TileEntityGlow te, double x, double y, double z, float partialTicks, int destroyStage) {
		for(int i = 0; i < te.layers.size(); i++) {
			GL11.glPushMatrix();
			GlStateManager.translate(x, y, z);
			GlStateManager.enableCull();
			if(!te.light.get(i)) {
				GlStateManager.pushAttrib();
		        GlStateManager.enableLighting();
				GL11.glEnable(GL11.GL_LIGHTING);
				Minecraft.getMinecraft().entityRenderer.enableLightmap();
			}

			float cx = te.coordX.get(i);
			float cy = te.coordY.get(i);
			float maxx = te.maxX.get(i);
			float maxy = te.maxY.get(i);
			
			Minecraft.getMinecraft().renderEngine.bindTexture(te.layers.get(i));
	        
			Tessellator tessellator = Tessellator.getInstance();
			tessellator.getBuffer().begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX);

			//NORTH
			tessellator.getBuffer().pos(0, 1, 0).tex(cx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(1, 1, 0).tex(cx + maxx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(1, 0, 0).tex(cx + maxx, cy).endVertex();
			tessellator.getBuffer().pos(0, 0, 0).tex(cx, cy).endVertex();
			
			//SOUTH
			tessellator.getBuffer().pos(1, 1, 1).tex(cx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 1, 1).tex(cx + maxx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 0, 1).tex(cx + maxx, cy).endVertex();
			tessellator.getBuffer().pos(1, 0, 1).tex(cx, cy).endVertex();
			
			//EAST
			tessellator.getBuffer().pos(1, 1, 0).tex(cx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(1, 1, 1).tex(cx + maxx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(1, 0, 1).tex(cx + maxx, cy).endVertex();
			tessellator.getBuffer().pos(1, 0, 0).tex(cx, cy).endVertex();
			
			//WEST
			tessellator.getBuffer().pos(0, 1, 1).tex(cx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 1, 0).tex(cx + maxx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 0, 0).tex(cx + maxx, cy).endVertex();
			tessellator.getBuffer().pos(0, 0, 1).tex(cx, cy).endVertex();
			
			//TOP
			tessellator.getBuffer().pos(1, 1, 0).tex(cx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 1, 0).tex(cx + maxx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 1, 1).tex(cx + maxx, cy).endVertex();
			tessellator.getBuffer().pos(1, 1, 1).tex(cx, cy).endVertex();
			
			//DOWN
			tessellator.getBuffer().pos(1, 0, 1).tex(cx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 0, 1).tex(cx + maxx, cy + maxy).endVertex();
			tessellator.getBuffer().pos(0, 0, 0).tex(cx + maxx, cy).endVertex();
			tessellator.getBuffer().pos(1, 0, 0).tex(cx, cy).endVertex();
			
			tessellator.draw();
			
			if(!te.light.get(i)) {
				GlStateManager.popAttrib();
		        GlStateManager.disableLighting();
				GL11.glDisable(GL11.GL_LIGHTING);
				Minecraft.getMinecraft().entityRenderer.disableLightmap();
			}
			GlStateManager.disableCull();
			GL11.glPopMatrix();
		}
	}
	
}