LavaGlassRenderer

package yesodmod.general.client;

import net.minecraft.block.Block;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.init.Blocks;
import net.minecraft.util.IIcon;
import net.minecraft.world.IBlockAccess;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.registry.ISimpleBlockRenderingHandler;

public class LavaGlassRenderer implements ISimpleBlockRenderingHandler {

    @Override
    public void renderInventoryBlock(Block block, int metadata, int modelId,
            RenderBlocks renderer)
    {

    }

    @Override
    public boolean renderWorldBlock(IBlockAccess world, int x, int y, int z,
            Block block, int modelId, RenderBlocks renderer)
    {
        //which render pass are we doing?
        if(ClientProxy.renderPass == 0)
        {
                //we are on the solid block render pass, lets render the solid diamond block
                IIcon icon = renderer.getBlockIconFromSide(Blocks.lava, 3);
                IIcon iconTop = renderer.getBlockIconFromSide(Blocks.lava, 0);
                drawLava(icon, iconTop, x,y,z);
        }
        else
        {
                //we are on the alpha render pass, draw the ice around the diamond
                renderer.renderStandardBlock(Blocks.glass, x, y, z);

        }

        return true;
    }

    private void drawLava(IIcon texture, IIcon textureTop, int x, int y, int z)
    {

        Tessellator tassellator = Tessellator.instance;
        //set the texture

        double minU = texture.getMinU();
        double maxU = texture.getMaxU();
        double minV = texture.getMinV();
        double maxV = texture.getMaxV();

        double minUTop = textureTop.getMinU();
        double maxUTop = textureTop.getMaxU();
        double minVTop = textureTop.getMinV();
        double maxVTop = textureTop.getMaxV();

        //offset the vertices from the centre of the block
        double xFinalmin = x + 0.10D;
        double xFinalmax = x + 0.90D;
        double yFinalmin = y + 0.10D;
        double yFinalmax = y + 0.90D;
        double zFinalmin = z + 0.90D;
        double zFinalmax = z + 0.10D;

        //facce laterali
        tassellator.addVertexWithUV(xFinalmax, yFinalmin, zFinalmin, maxU, maxV);
        tassellator.addVertexWithUV(xFinalmax, yFinalmax, zFinalmin, maxU, minV);
        tassellator.addVertexWithUV(xFinalmin, yFinalmax, zFinalmin, minU, minV);
        tassellator.addVertexWithUV(xFinalmin, yFinalmin, zFinalmin, minU, maxV);

        tassellator.addVertexWithUV(xFinalmin, yFinalmin, zFinalmin, minU, maxV);
        tassellator.addVertexWithUV(xFinalmin, yFinalmax, zFinalmin, minU, minV);
        tassellator.addVertexWithUV(xFinalmin, yFinalmax, zFinalmax, maxU, minV);
        tassellator.addVertexWithUV(xFinalmin, yFinalmin, zFinalmax, maxU, maxV);

        tassellator.addVertexWithUV(xFinalmin, yFinalmin, zFinalmax, maxU, maxV);
        tassellator.addVertexWithUV(xFinalmin, yFinalmax, zFinalmax, maxU, minV);
        tassellator.addVertexWithUV(xFinalmax, yFinalmax, zFinalmax, minU, minV);
        tassellator.addVertexWithUV(xFinalmax, yFinalmin, zFinalmax, minU, maxV);

        tassellator.addVertexWithUV(xFinalmax, yFinalmin, zFinalmax, minU, maxV);
        tassellator.addVertexWithUV(xFinalmax, yFinalmax, zFinalmax, minU, minV);
        tassellator.addVertexWithUV(xFinalmax, yFinalmax, zFinalmin, maxU, minV);
        tassellator.addVertexWithUV(xFinalmax, yFinalmin, zFinalmin, maxU, maxV);

        //facce inferiori e superiori

        tassellator.addVertexWithUV(xFinalmax, yFinalmin, zFinalmin, maxUTop, maxVTop);
        tassellator.addVertexWithUV(xFinalmin, yFinalmin, zFinalmin, maxUTop, minVTop);
        tassellator.addVertexWithUV(xFinalmin, yFinalmin, zFinalmax, minUTop, minVTop);
        tassellator.addVertexWithUV(xFinalmax, yFinalmin, zFinalmax, minUTop, maxVTop);

        tassellator.addVertexWithUV(xFinalmax, yFinalmax, zFinalmax, minUTop, maxVTop);
        tassellator.addVertexWithUV(xFinalmin, yFinalmax, zFinalmax, minUTop, minVTop);
        tassellator.addVertexWithUV(xFinalmin, yFinalmax, zFinalmin, maxUTop, minVTop);
        tassellator.addVertexWithUV(xFinalmax, yFinalmax, zFinalmin, maxUTop, maxVTop);

    }

    @Override
    public boolean shouldRender3DInInventory(int modelId)
    {
        return false;
    }

    @Override
    public int getRenderId()
    {
        return ClientProxy.lavaGlassRenderType;
    }

}