src/main/java/mekanism/client/render/transmitter/RenderLogisticalTransporter.java

package mekanism.client.render.transmitter;

import java.util.HashMap;

import mcmultipart.multipart.IMultipart;
import mekanism.api.Coord4D;
import mekanism.client.model.ModelTransporterBox;
import mekanism.client.render.MekanismRenderer;
import mekanism.client.render.MekanismRenderer.DisplayInteger;
import mekanism.client.render.MekanismRenderer.Model3D;
import mekanism.common.content.transporter.TransporterStack;
import mekanism.common.item.ItemConfigurator;
import mekanism.common.multipart.PartDiversionTransporter;
import mekanism.common.multipart.PartLogisticalTransporter;
import mekanism.common.util.MekanismUtils;
import mekanism.common.util.MekanismUtils.ResourceType;
import mekanism.common.util.TransporterUtils;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.entity.Render;
import net.minecraft.client.renderer.texture.TextureAtlasSprite;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemBlock;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.world.World;

import org.lwjgl.opengl.GL11;

public class RenderLogisticalTransporter extends RenderTransmitterBase
{
	private ModelTransporterBox modelBox = new ModelTransporterBox();
	
	private EntityItem entityItem = new EntityItem(null);
	
	private Render<Entity> renderer = (Render<Entity>)Minecraft.getMinecraft().getRenderManager().getEntityClassRenderObject(EntityItem.class);
	
	private static HashMap<EnumFacing, HashMap<Integer, DisplayInteger>> cachedOverlays = new HashMap<EnumFacing, HashMap<Integer, DisplayInteger>>();
	
	private static TextureAtlasSprite gunpowderIcon;
	private static TextureAtlasSprite torchOffIcon;
	private static TextureAtlasSprite torchOnIcon;
	
	public RenderLogisticalTransporter()
	{
		super();
	}
	
	@Override
	public void renderMultipartAt(IMultipart multipart, double x, double y, double z, float partialTick, int destroyStage) 
	{
		PartLogisticalTransporter transporter = (PartLogisticalTransporter)multipart;
		GL11.glPushMatrix();

		//possibly TODO
		entityItem.setNoDespawn();
		entityItem.hoverStart = 0;

		entityItem.setPosition(transporter.getPos().getX() + 0.5, transporter.getPos().getY() + 0.5, transporter.getPos().getZ() + 0.5);
		entityItem.worldObj = transporter.getWorld();

		for(TransporterStack stack : transporter.getTransmitter().transit)
		{
			if(stack != null)
			{
				GL11.glPushMatrix();
				entityItem.setEntityItemStack(stack.itemStack);

				float[] pos = TransporterUtils.getStackPosition(transporter.getTransmitter(), stack, partialTick*transporter.tier.speed);

				GL11.glTranslated(x + pos[0], y + pos[1], z + pos[2]);
				GL11.glScalef(0.75F, 0.75F, 0.75F);

				renderer.doRender(entityItem, 0, 0, 0, 0, 0);
				GL11.glPopMatrix();

				if(stack.color != null)
				{
					bindTexture(MekanismUtils.getResource(ResourceType.RENDER, "TransporterBox.png"));
					GL11.glPushMatrix();
					MekanismRenderer.glowOn();
					GL11.glDisable(GL11.GL_CULL_FACE);
					GL11.glColor4f(stack.color.getColor(0), stack.color.getColor(1), stack.color.getColor(2), 1.0F);
					GL11.glTranslatef((float)(x + pos[0]), (float)(y + pos[1] - ((stack.itemStack.getItem() instanceof ItemBlock) ? 0.1 : 0)), (float)(z + pos[2]));
					modelBox.render(0.0625F);
					MekanismRenderer.glowOff();
					GL11.glPopMatrix();
				}
			}
		}

		if(transporter instanceof PartDiversionTransporter)
		{
			EntityPlayer player = mc.thePlayer;
			World world = mc.thePlayer.worldObj;
			ItemStack itemStack = player.getCurrentEquippedItem();
			MovingObjectPosition pos = player.rayTrace(8.0D, 1.0F);

			if(pos != null && itemStack != null && itemStack.getItem() instanceof ItemConfigurator)
			{
				Coord4D obj = new Coord4D(pos.getBlockPos(), transporter.getWorld());

				if(obj.equals(new Coord4D(transporter.getPos(), transporter.getWorld())))
				{
					int mode = ((PartDiversionTransporter)transporter).modes[pos.sideHit.ordinal()];

					pushTransporter();

					GL11.glColor4f(1.0F, 1.0F, 1.0F, 0.8F);

					bindTexture(MekanismRenderer.getBlocksTexture());
					GL11.glTranslatef((float)x, (float)y, (float)z);
					GL11.glScalef(0.5F, 0.5F, 0.5F);
					GL11.glTranslatef(0.5F, 0.5F, 0.5F);

					int display = getOverlayDisplay(world, pos.sideHit, mode).display;
					GL11.glCallList(display);

					popTransporter();
				}
			}
		}

		GL11.glPopMatrix();
	}
	
	private DisplayInteger getOverlayDisplay(World world, EnumFacing side, int mode)
	{
		if(cachedOverlays.containsKey(side) && cachedOverlays.get(side).containsKey(mode))
		{
			return cachedOverlays.get(side).get(mode);
		}

		TextureAtlasSprite icon = null;

		switch(mode)
		{
			case 0:
				icon = gunpowderIcon;
				break;
			case 1:
				icon = torchOnIcon;
				break;
			case 2:
				icon = torchOffIcon;
				break;
		}

		Model3D toReturn = new Model3D();
		toReturn.baseBlock = Blocks.stone;
		toReturn.setTexture(icon);

		DisplayInteger display = DisplayInteger.createAndStart();

		if(cachedOverlays.containsKey(side))
		{
			cachedOverlays.get(side).put(mode, display);
		}
		else {
			HashMap<Integer, DisplayInteger> map = new HashMap<Integer, DisplayInteger>();
			map.put(mode, display);
			cachedOverlays.put(side, map);
		}

		switch(side)
		{
			case DOWN:
			{
				toReturn.minY = -0.01;
				toReturn.maxY = 0;

				toReturn.minX = 0;
				toReturn.minZ = 0;
				toReturn.maxX = 1;
				toReturn.maxZ = 1;
				break;
			}
			case UP:
			{
				toReturn.minY = 1;
				toReturn.maxY = 1.01;

				toReturn.minX = 0;
				toReturn.minZ = 0;
				toReturn.maxX = 1;
				toReturn.maxZ = 1;
				break;
			}
			case NORTH:
			{
				toReturn.minZ = -0.01;
				toReturn.maxZ = 0;

				toReturn.minX = 0;
				toReturn.minY = 0;
				toReturn.maxX = 1;
				toReturn.maxY = 1;
				break;
			}
			case SOUTH:
			{
				toReturn.minZ = 1;
				toReturn.maxZ = 1.01;

				toReturn.minX = 0;
				toReturn.minY = 0;
				toReturn.maxX = 1;
				toReturn.maxY = 1;
				break;
			}
			case WEST:
			{
				toReturn.minX = -0.01;
				toReturn.maxX = 0;

				toReturn.minY = 0;
				toReturn.minZ = 0;
				toReturn.maxY = 1;
				toReturn.maxZ = 1;
				break;
			}
			case EAST:
			{
				toReturn.minX = 1;
				toReturn.maxX = 1.01;

				toReturn.minY = 0;
				toReturn.minZ = 0;
				toReturn.maxY = 1;
				toReturn.maxZ = 1;
				break;
			}
			default:
			{
				break;
			}
		}

		MekanismRenderer.renderObject(toReturn);
		display.endList();

		return display;
	}
	
	private void popTransporter()
	{
		GL11.glPopAttrib();
		MekanismRenderer.glowOff();
		MekanismRenderer.blendOff();
		GL11.glPopMatrix();
	}

	private void pushTransporter()
	{
		GL11.glPushMatrix();
		GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
		GL11.glEnable(GL11.GL_CULL_FACE);
		GL11.glDisable(GL11.GL_LIGHTING);
		MekanismRenderer.glowOn();
		MekanismRenderer.blendOn();
	}
	
	public static void onStitch(TextureMap map)
	{
		cachedOverlays.clear();
		
		gunpowderIcon = map.getTextureExtry("minecraft:items/gunpowder");
		torchOffIcon = map.getTextureExtry("minecraft:blocks/redstone_torch_off");
		torchOnIcon = map.getTextureExtry("minecraft:blocks/redstone_torch_on");
	}
}