package gregtech.common.render;

import net.minecraft.client.renderer.Tessellator;
import net.minecraft.util.IIcon;

public class GT_RenderUtil
{
  public static void renderItemIcon(IIcon icon, double size, double z, float nx, float ny, float nz)
  {
    renderItemIcon(icon, 0.0D, 0.0D, size, size, z, nx, ny, nz);
  }
  
  public static void renderItemIcon(IIcon icon, double xStart, double yStart, double xEnd, double yEnd, double z, float nx, float ny, float nz)
  {
    if (icon == null) {
      return;
    }
    Tessellator.instance.startDrawingQuads();
    Tessellator.instance.setNormal(nx, ny, nz);
    if (nz > 0.0F)
    {
      Tessellator.instance.addVertexWithUV(xStart, yStart, z, icon.getMinU(), icon.getMinV());
      Tessellator.instance.addVertexWithUV(xEnd, yStart, z, icon.getMaxU(), icon.getMinV());
      Tessellator.instance.addVertexWithUV(xEnd, yEnd, z, icon.getMaxU(), icon.getMaxV());
      Tessellator.instance.addVertexWithUV(xStart, yEnd, z, icon.getMinU(), icon.getMaxV());
    }
    else
    {
      Tessellator.instance.addVertexWithUV(xStart, yEnd, z, icon.getMinU(), icon.getMaxV());
      Tessellator.instance.addVertexWithUV(xEnd, yEnd, z, icon.getMaxU(), icon.getMaxV());
      Tessellator.instance.addVertexWithUV(xEnd, yStart, z, icon.getMaxU(), icon.getMinV());
      Tessellator.instance.addVertexWithUV(xStart, yStart, z, icon.getMinU(), icon.getMinV());
    }
    Tessellator.instance.draw();
  }
}