Chisel/src/main/java/team/chisel/ctmlib/CTMRenderer.java

package team.chisel.ctmlib;

import net.minecraft.block.Block;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.crash.CrashReport;
import net.minecraft.crash.CrashReportCategory;
import net.minecraft.util.ReportedException;
import net.minecraft.world.IBlockAccess;

import org.lwjgl.opengl.GL11;

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

/**
 * A convenience base class for CTM blocks. Any block using this must implement {@link ICTMBlock}.
 */
public class CTMRenderer implements ISimpleBlockRenderingHandler {

	private int renderId;

	public CTMRenderer(int renderId) {
		this.renderId = renderId;
	}

	@Override
	public void renderInventoryBlock(Block block, int metadata, int modelID, RenderBlocks renderer) {
		GL11.glTranslatef(-0.5F, -0.5F, -0.5F);
		RenderBlocks rb = getContext(renderer, block, Minecraft.getMinecraft().theWorld, ((ICTMBlock<?>)block).getManager(metadata), metadata);
		Drawing.drawBlock(block, metadata, rb);
		GL11.glTranslatef(0.5F, 0.5F, 0.5F);
		rb.unlockBlockBounds();
	}

	@Override
	public boolean renderWorldBlock(IBlockAccess world, int x, int y, int z, Block block, int modelId, RenderBlocks rendererOld) {
		try {
			int meta = world.getBlockMetadata(x, y, z);
			RenderBlocks rb = getContext(rendererOld, block, world, ((ICTMBlock<?>) block).getManager(world, x, y, z, meta), meta);
			boolean ret = rb.renderStandardBlock(block, x, y, z);
			rb.unlockBlockBounds();
			return ret;
		} catch (Throwable t) {
			CrashReport crashreport = CrashReport.makeCrashReport(t, "Rendering CTM Block");
			CrashReportCategory crashreportcategory = crashreport.makeCategory("Block being rendered");
			crashreportcategory.addCrashSection("Block name", GameRegistry.findUniqueIdentifierFor(block));
			crashreportcategory.addCrashSection("Block metadata", world.getBlockMetadata(x, y, z));
			throw new ReportedException(crashreport);
		}		
	}

	protected RenderBlocks getContext(RenderBlocks rendererOld, Block block, IBlockAccess world, ISubmapManager manager, int meta) {
		if (!rendererOld.hasOverrideBlockTexture() && manager != null) {
			RenderBlocks rb = manager.createRenderContext(rendererOld, block, world);
			if (rb != null && rb != rendererOld) {
				rb.blockAccess = world;
				if (rendererOld.lockBlockBounds) {
					rb.overrideBlockBounds(rendererOld.renderMinX, rendererOld.renderMinY, rendererOld.renderMinZ, rendererOld.renderMaxX, rendererOld.renderMaxY, rendererOld.renderMaxZ);
				}
				if (rb instanceof RenderBlocksCTM) {
					RenderBlocksCTM rbctm = (RenderBlocksCTM) rb;
					rbctm.manager = rbctm.manager == null ? manager : rbctm.manager;
					rbctm.rendererOld = rbctm.rendererOld == null ? rendererOld : rbctm.rendererOld;
				}
				return rb;
			}
		}
		return rendererOld;
	}

	@Override
	public boolean shouldRender3DInInventory(int renderId) {
		return true;
	}

	@Override
	public int getRenderId() {
		return renderId;
	}
}