BloodMagic/src/main/java/WayofTime/bloodmagic/client/render/RenderAltar.java

package WayofTime.bloodmagic.client.render;

import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.RenderHelper;
import net.minecraft.client.renderer.block.model.ItemCameraTransforms;
import net.minecraft.client.renderer.entity.RenderItem;
import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;
import WayofTime.bloodmagic.tile.TileAltar;

public class RenderAltar extends TileEntitySpecialRenderer<TileAltar>
{
    public static Minecraft mc = Minecraft.getMinecraft();

    @Override
    public void renderTileEntityAt(TileAltar tileAltar, double x, double y, double z, float partialTicks, int destroyStage)
    {
        ItemStack inputStack = tileAltar.getStackInSlot(0);

        GlStateManager.pushMatrix();
        GlStateManager.translate(x, y, z);
        this.renderItem(tileAltar.getWorld(), inputStack, partialTicks);
        GlStateManager.popMatrix();
    }

    private void renderItem(World world, ItemStack stack, float partialTicks)
    {
        RenderItem itemRenderer = mc.getRenderItem();
        if (stack != null)
        {
            GlStateManager.translate(0.5, 1, 0.5);
            EntityItem entityitem = new EntityItem(world, 0.0D, 0.0D, 0.0D, stack);
            entityitem.getEntityItem().stackSize = 1;
            entityitem.hoverStart = 0.0F;
            GlStateManager.pushMatrix();
            GlStateManager.disableLighting();

            float rotation = (float) (720.0 * (System.currentTimeMillis() & 0x3FFFL) / 0x3FFFL);

            GlStateManager.rotate(rotation, 0.0F, 1.0F, 0);
            GlStateManager.scale(0.5F, 0.5F, 0.5F);
            GlStateManager.pushAttrib();
            RenderHelper.enableStandardItemLighting();
            itemRenderer.func_181564_a(entityitem.getEntityItem(), ItemCameraTransforms.TransformType.GROUND);
            RenderHelper.disableStandardItemLighting();
            GlStateManager.popAttrib();

            GlStateManager.enableLighting();
            GlStateManager.popMatrix();
        }
    }
}