CelestialStreamer

I need to be able to draw lines between two coordinates in Minecraft. I think I understand how to use the GL11 functions to get the actual drawing done. What I need to know is how to register my drawing function to be called every time the world needs to be rendered. (I believe this is the approach I need to take). This is the simplest example I can make that demonstrates what I need. All that's missing is how get Forge to call my draw function. package com.example.drawStuff; import org.lwjgl.opengl.GL11; import net.minecraft.util.math.BlockPos; import net.minecraftforge.fml.common.Mod; import net.minecraftforge.fml.common.Mod.EventHandler; import net.minecraftforge.fml.common.event.FMLInitializationEvent; @Mod(modid = DrawStuffMod.MODID, name = DrawStuffMod.NAME, version = DrawStuffMod.VERSION) public class DrawStuffMod { public static final String NAME = "DrawStuffMod"; public static final String MODID = "drawstuffmod"; public static final String VERSION = "1.0"; @Mod.Instance(DrawStuffMod.MODID) public static DrawStuffMod instance; @EventHandler public void init(FMLInitializationEvent event) { // Do initialization stuff } // How do I get Forge to call this function? (Or a wrapper function if needed) private void drawLineWithGL(BlockPos blockA, BlockPos blockB) { GL11.glColor4f(1F, 0F, 1F, 0F); // change color and set alpha GL11.glBegin(GL11.GL_LINE_STRIP); GL11.glVertex3d(blockA.getX(), blockA.getY(), blockA.getZ()); GL11.glVertex3d(blockB.getX(), blockB.getY(), blockB.getZ()); GL11.glEnd(); } } Bonus points if you can show how to adjust the thickness of the line too.