BiomesOPlenty/src/minecraft/biomesoplenty/blocks/renderers/FoliageRenderer.java

package biomesoplenty.blocks.renderers;

import net.minecraft.block.Block;
import net.minecraft.client.renderer.EntityRenderer;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.world.IBlockAccess;
import biomesoplenty.api.Blocks;
import cpw.mods.fml.client.registry.ISimpleBlockRenderingHandler;
import cpw.mods.fml.client.registry.RenderingRegistry;

public class FoliageRenderer implements ISimpleBlockRenderingHandler
{
    public static int render = RenderingRegistry.getNextAvailableRenderId();
    private final int GRASSTOP = 6;

    @Override
    public void renderInventoryBlock(Block block, int metadata, int modelID, RenderBlocks renderer)
    {
        // Doesn't render in inventory
    }

    @Override
    public boolean renderWorldBlock(IBlockAccess world, int x, int y, int z, Block block, int modelId, RenderBlocks renderer)
    {
        int meta = world.getBlockMetadata(x, y, z);
    	
        if (modelId == render)
        {
            if (meta == 0)
                return renderer.renderBlockLilyPad(block, x, y, z);
            else
                return renderCrossedSquares(block, x, y, z, renderer);
        }
        return true;
    }

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

    @Override
    public int getRenderId()
    {
        return render;
    }
    
    private boolean renderCrossedSquares(Block par1Block, int par2, int par3, int par4, RenderBlocks renderer)
    {
        Tessellator tessellator = Tessellator.instance;
        tessellator.setBrightness(par1Block.getMixedBrightnessForBlock(renderer.blockAccess, par2, par3, par4));
        float f = 1.0F;
        int l = par1Block.colorMultiplier(renderer.blockAccess, par2, par3, par4);
        float f1 = (float)(l >> 16 & 255) / 255.0F;
        float f2 = (float)(l >> 8 & 255) / 255.0F;
        float f3 = (float)(l & 255) / 255.0F;

        if (EntityRenderer.anaglyphEnable)
        {
            float f4 = (f1 * 30.0F + f2 * 59.0F + f3 * 11.0F) / 100.0F;
            float f5 = (f1 * 30.0F + f2 * 70.0F) / 100.0F;
            float f6 = (f1 * 30.0F + f3 * 70.0F) / 100.0F;
            f1 = f4;
            f2 = f5;
            f3 = f6;
        }

        tessellator.setColorOpaque_F(f * f1, f * f2, f * f3);
        double d0 = (double)par2;
        double d1 = (double)par3;
        double d2 = (double)par4;

        if (par1Block == Blocks.foliage.get())
        {
            long i1;
            if (renderer.blockAccess.getBlockMetadata(par2, par3, par4) == GRASSTOP) // High Grass Top
                i1 = (long)(par2 * 3129871) ^ (long)par4 * 116129781L ^ (long)(par3 - 1);
            else
                i1 = (long)(par2 * 3129871) ^ (long)par4 * 116129781L ^ (long)par3;
            
            i1 = i1 * i1 * 42317861L + i1 * 11L;
            d0 += ((double)((float)(i1 >> 16 & 15L) / 15.0F) - 0.5D) * 0.5D;
            d1 += ((double)((float)(i1 >> 20 & 15L) / 15.0F) - 1.0D) * 0.2D;
            d2 += ((double)((float)(i1 >> 24 & 15L) / 15.0F) - 0.5D) * 0.5D;
        }

        if (renderer.blockAccess.getBlockMetadata(par2, par3, par4) == 10)
        	renderer.drawCrossedSquares(par1Block, renderer.blockAccess.getBlockMetadata(par2, par3, par4), d0, d1 - 1, d2, 1.0F);
        else
        	renderer.drawCrossedSquares(par1Block, renderer.blockAccess.getBlockMetadata(par2, par3, par4), d0, d1, d2, 1.0F);
        return true;
    }
}