Chisel/src/main/java/team/chisel/client/render/item/ItemChiselRenderer.java

package team.chisel.client.render.item;

import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.entity.RenderItem;
import net.minecraft.item.ItemStack;
import net.minecraftforge.client.IItemRenderer;

import org.lwjgl.opengl.GL11;

public class ItemChiselRenderer implements IItemRenderer {

	RenderBlocks renderBlock = new RenderBlocks();
	RenderItem renderItem = new RenderItem();

	@Override
	public boolean handleRenderType(ItemStack item, ItemRenderType type) {
		return type == IItemRenderer.ItemRenderType.INVENTORY;
	}

	@Override
	public boolean shouldUseRenderHelper(ItemRenderType type, ItemStack item, ItemRendererHelper helper) {
		return false;
	}

	@Override
	public void renderItem(ItemRenderType type, ItemStack stack, Object... data) {
		GL11.glPushMatrix();
		
		// Fixes potential render bug with blocks that draw this item
		renderItem.zLevel = 10f;
		renderItem.renderItemIntoGUI(Minecraft.getMinecraft().fontRenderer, Minecraft.getMinecraft().renderEngine, stack, 0, 0);

		if (stack.stackTagCompound != null) {

			ItemStack chiselTarget = ItemStack.loadItemStackFromNBT(stack.stackTagCompound.getCompoundTag("chiselTarget"));
			if (chiselTarget != null) {

				GL11.glScalef(0.65f, 0.65f, 0.65f);
				GL11.glTranslatef(-8f, -8f, 0.0f);

				renderItem.renderItemIntoGUI(Minecraft.getMinecraft().fontRenderer, Minecraft.getMinecraft().renderEngine, chiselTarget, 8, 8);
			}
		}
		GL11.glPopMatrix();
	}

}