BiomesOPlenty/common/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.util.Icon;
import net.minecraft.world.IBlockAccess;
import biomesoplenty.api.Blocks;
import cpw.mods.fml.client.registry.ISimpleBlockRenderingHandler;

public class FoliageRenderer implements ISimpleBlockRenderingHandler
{
	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 == RenderUtils.foliageModel)
		{
			if (meta == 0)
				return renderBlockAlgae(renderer, 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 RenderUtils.foliageModel;
	}
	
    public boolean renderBlockAlgae(RenderBlocks renderer, Block block, int x, int y, int z)
    {
        Tessellator tessellator = Tessellator.instance;
        Icon icon = renderer.getBlockIconFromSide(block, 1);

        if (renderer.hasOverrideBlockTexture())
        {
            icon = renderer.overrideBlockTexture;
        }
        
		float cf = 1.0F;
		int cl = block.colorMultiplier(renderer.blockAccess, x, y, z);
		float c1 = (cl >> 16 & 255) / 255.0F;
		float c2 = (cl >> 8 & 255) / 255.0F;
		float c3 = (cl & 255) / 255.0F;

		if (EntityRenderer.anaglyphEnable)
		{
			float f4 = (c1 * 30.0F + c2 * 59.0F + c3 * 11.0F) / 100.0F;
			float f5 = (c1 * 30.0F + c2 * 70.0F) / 100.0F;
			float f6 = (c1 * 30.0F + c3 * 70.0F) / 100.0F;
			c1 = f4;
			c2 = f5;
			c3 = f6;
		}

		tessellator.setColorOpaque_F(cf * c1, cf * c2, cf * c3);

        float f = 0.015625F;
        double d0 = (double)icon.getMinU();
        double d1 = (double)icon.getMinV();
        double d2 = (double)icon.getMaxU();
        double d3 = (double)icon.getMaxV();
        long l = (long)(x * 3129871) ^ (long)z * 116129781L ^ (long)y;
        l = l * l * 42317861L + l * 11L;
        int i1 = (int)(l >> 16 & 3L);
        tessellator.setBrightness(block.getMixedBrightnessForBlock(renderer.blockAccess, x, y, z));
        float f1 = (float)x + 0.5F;
        float f2 = (float)z + 0.5F;
        float f3 = (float)(i1 & 1) * 0.5F * (float)(1 - i1 / 2 % 2 * 2);
        float f4 = (float)(i1 + 1 & 1) * 0.5F * (float)(1 - (i1 + 1) / 2 % 2 * 2);
        tessellator.addVertexWithUV((double)(f1 + f3 - f4), (double)((float)y + f), (double)(f2 + f3 + f4), d0, d1);
        tessellator.addVertexWithUV((double)(f1 + f3 + f4), (double)((float)y + f), (double)(f2 - f3 + f4), d2, d1);
        tessellator.addVertexWithUV((double)(f1 - f3 + f4), (double)((float)y + f), (double)(f2 - f3 - f4), d2, d3);
        tessellator.addVertexWithUV((double)(f1 - f3 - f4), (double)((float)y + f), (double)(f2 + f3 - f4), d0, d3);
        tessellator.addVertexWithUV((double)(f1 - f3 - f4), (double)((float)y + f), (double)(f2 + f3 - f4), d0, d3);
        tessellator.addVertexWithUV((double)(f1 - f3 + f4), (double)((float)y + f), (double)(f2 - f3 - f4), d2, d3);
        tessellator.addVertexWithUV((double)(f1 + f3 + f4), (double)((float)y + f), (double)(f2 - f3 + f4), d2, d1);
        tessellator.addVertexWithUV((double)(f1 + f3 - f4), (double)((float)y + f), (double)(f2 + f3 + f4), d0, d1);
        return true;
    }

	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 = (l >> 16 & 255) / 255.0F;
		float f2 = (l >> 8 & 255) / 255.0F;
		float f3 = (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 = par2;
		double d1 = par3;
		double d2 = par4;

		if (par1Block == Blocks.foliage.get())
		{
			long i1;
			if (renderer.blockAccess.getBlockMetadata(par2, par3, par4) == GRASSTOP) {
				i1 = par2 * 3129871 ^ par4 * 116129781L ^ par3 - 1;
			} else {
				i1 = par2 * 3129871 ^ par4 * 116129781L ^ par3;
			}

			i1 = i1 * i1 * 42317861L + i1 * 11L;
			d0 += ((i1 >> 16 & 15L) / 15.0F - 0.5D) * 0.5D;
			d1 += ((i1 >> 20 & 15L) / 15.0F - 1.0D) * 0.2D;
			d2 += ((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;
	}
}