TinkersConstruct/src/main/java/tconstruct/util/ItemHelper.java

package tconstruct.util;

import java.lang.reflect.Field;
import net.minecraft.block.Block;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.*;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.*;
import net.minecraft.util.IIcon;
import net.minecraftforge.event.entity.living.LivingDropsEvent;
import org.lwjgl.opengl.GL11;
import tconstruct.TConstruct;

public class ItemHelper {
    public static Object getStaticItem(String name, String classPackage) {
        try {
            Class clazz = Class.forName(classPackage);
            Field field = clazz.getDeclaredField(name);
            Object ret = field.get(null);
            if (ret != null && (ret instanceof ItemStack || ret instanceof Item)) return ret;
            return null;
        } catch (Exception e) {
            TConstruct.logger.warn("Could not find " + name + "from " + classPackage);
            return null;
        }
    }

    public static void addDrops(LivingDropsEvent event, ItemStack dropStack) {
        EntityItem entityitem = new EntityItem(
                event.entityLiving.worldObj,
                event.entityLiving.posX,
                event.entityLiving.posY,
                event.entityLiving.posZ,
                dropStack);
        entityitem.delayBeforeCanPickup = 10;
        event.drops.add(entityitem);
    }

    public static void renderStandardInvBlock(RenderBlocks renderblocks, Block block, int meta) {
        Tessellator tessellator = Tessellator.instance;
        GL11.glTranslatef(-0.5F, -0.5F, -0.5F);
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, -1F, 0.0F);
        renderblocks.renderFaceYNeg(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(0, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, 1.0F, 0.0F);
        renderblocks.renderFaceYPos(
                block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(1, meta))); // block.getIcon(1, meta));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, 0.0F, -1F);
        renderblocks.renderFaceZNeg(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(2, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, 0.0F, 1.0F);
        renderblocks.renderFaceZPos(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(3, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(-1F, 0.0F, 0.0F);
        renderblocks.renderFaceXNeg(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(4, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(1.0F, 0.0F, 0.0F);
        renderblocks.renderFaceXPos(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(5, meta)));
        tessellator.draw();
        GL11.glTranslatef(0.5F, 0.5F, 0.5F);
    }

    public static void renderInvBlockFace(RenderBlocks renderblocks, Block block, int meta) {
        Tessellator tessellator = Tessellator.instance;
        GL11.glScalef(2f, 2f, 2f);
        GL11.glTranslatef(-0.5F, -0.5F, -0.5F);
        GL11.glRotatef(45, 0, 1, 0);
        GL11.glRotatef(60, 1, 0, 0);
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, -1F, 0.0F);
        renderblocks.renderFaceYNeg(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(0, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, 1.0F, 0.0F);
        renderblocks.renderFaceYPos(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(1, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, 0.0F, -1F);
        renderblocks.renderFaceZNeg(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(2, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(0.0F, 0.0F, 1.0F);
        renderblocks.renderFaceZPos(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(3, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(-1F, 0.0F, 0.0F);
        renderblocks.renderFaceXNeg(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(4, meta)));
        tessellator.draw();
        tessellator.startDrawingQuads();
        tessellator.setNormal(1.0F, 0.0F, 0.0F);
        renderblocks.renderFaceXPos(block, 0.0D, 0.0D, 0.0D, ItemHelper.getIconSafe(block.getIcon(5, meta)));
        tessellator.draw();
        GL11.glTranslatef(0.5F, 0.5F, 0.5F);
    }

    public static IIcon getIconSafe(IIcon icon) {
        if (icon != null) return icon;
        return ((TextureMap) Minecraft.getMinecraft().getTextureManager().getTexture(TextureMap.locationBlocksTexture))
                .getAtlasSprite("missingno");
    }
}