TNT Line Drawing Class Concept v2.1

package net.minecraft.src;

import java.awt.Color; //temp so you get the idea
import java.util.ArrayList;
import java.util.HashMap;

import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.entity.RenderManager;
import net.minecraft.entity.player.EntityPlayer;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL12;

public class EntityLineCreator extends BaseMod
{
    private /*Color*/ linecolor;
    private boolean colormodulation = false;
    private int linebrightness = 255
    private HashMap entitycolors = new HashMap();

    private /*Entity*/ trackedentitytype;
    private ArrayList</*Entity*/> entities = new ArrayList</*Entity*/>();

    private HashMap xcoords = new HashMap();
    private HashMap ycoords = new HashMap();
    private HashMap zcoords = new HashMap();

    private HashMap oldxcoords = new HashMap();
    private HashMap oldycoords = new HashMap();
    private HashMap oldzcoords = new HashMap();

    public EntityLineCreator(/*Entity*/ trackedentityclass, /*Color*/ colorofline, boolean modulatecolor) {
        trackedentitytype = trackedentityclass;
        linecolor = colorofline;
        colormodulation = modulatecolor;
        entities = /*World.getEntities(trackedentitytype)*/ //get all entities of the tracked type
    }

    public void render(RenderWorldLastEvent event)
    {
        if (player == null || info == null || info.getPoint1() == null && info.getPoint2() == null)
            return;
        GL11.glPushMatrix();
        GL11.glEnable(GL12.GL_RESCALE_NORMAL);
        GL11.glDisable(GL11.GL_DEPTH_TEST);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        Tessellator tess = Tessellator.instance;
        Tessellator.renderingWorldRenderer = false;

        entities = /*World.getEntities(trackedentitytype)*/
        if(entities.size() == 0) return; //if there aren't any entities return
        logCoords(); //make the current coords old
        getEntityCoords(); //get the new coords
        drawLine(tess); //draw a bunch of lines
    }

    public void logCoords() {
        oldxcoords = xcoords;
        oldycoords = ycoords;
        oldzcoords = zcoords;
    }

    public void getEntityCoords() {
        xcoords.clear();
        ycoords.clear();
        zcoords.clear();
        for(/*Entity e : entities*/) {
            xcoords.put(/*e.getID(), e.getX()*/);
            ycoords.put(/*e.getID(), e.getY()*/);
            zcoords.put(/*e.getID(), e.getZ()*/);
        }
    }

    private void drawLine(Tessellator tess)
    {
        if (oldxcoords.isEmpty() || oldycoords.isEmpty() || oldzcoords.isEmpty()) {
            if(colormodulation == true) {
                if(entitycolors.get(/*e.getID()*/) == null || entitycolors.get(/*e.getID()*/) == 0) {
                    entitycolors.put(/*e.getID()*/, 255);
                } else {
                    entitycolors.put(/*e.getID()*/, entitycolors.get(/*e.getID()*/) - 1);
                }
                /*tess.setDrawingColor(new Color(linecolor.getRed(),linecolor.getBlue(),linecolor.getGreen(),entitycolors.get(/*e.getID()*/)))*/
            } else {
                /*tess.setDrawingColor(new Color(linecolor.getRed(),linecolor.getBlue(),linecolor.getGreen())*/;
            }
            tess.startDrawing(GL11.GL_LINES);
            tess.addVertex(oldxcoords.get(/*e.getID()*/),oldycoords.get(/*e.getID()*/),oldzcoords.get(/*e.getID()*/));
            tess.addVertex(xcoords.get(/*e.getID()*/), ycoords.get(/*e.getID()*/), zcoords.get(/*e.getID()*/));
            tess.draw();
        }
    }
}