redstone.java

package xyz.jadonfowler.redhelp;

import net.minecraft.block.state.IBlockState;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.World;
import net.minecraftforge.client.event.RenderWorldEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class ClientEventHandler {
    @SubscribeEvent public void renderWorldPost(RenderWorldEvent.Post e) {
        e.renderer.begin(7, DefaultVertexFormats.POSITION_TEX_NORMAL);
        EntityPlayer player = Minecraft.getMinecraft().thePlayer;
        World world = Minecraft.getMinecraft().theWorld;
        int r = 15;
        for (int y = -r; y < r; y++) {
            for (int z = -r; z < r; z++) {
                for (int x = -r; x < r; x++) {
                    BlockPos pos = new BlockPos(player.posX + x, player.posY + y, player.posZ + z);
                    IBlockState s = world.getBlockState(pos);
                    for (EnumFacing face : EnumFacing.VALUES) {
                        if (world.getRedstonePower(pos, face) > 0) {
                            for (int rx = 0; rx < 2; rx++) {
                                for (int rz = 0; rz < 2; rz++) {
                                    for (int ry = 0; ry < 2; ry++) {
                                        e.renderer.pos(pos.getX() + rx, pos.getY() + ry, pos.getZ() + rz)
                                                .color(1, 0, 0, 1).endVertex();
                                    }
                                }
                            }
                            Tessellator.getInstance().draw();
                        }
                    }
                }
            }
        }
    }
}