package com.mathorama.wumpus;

import java.awt.Color;
import java.awt.Point;
import java.awt.Polygon;
import java.awt.Rectangle;


public class Face implements Comparable<Face>
{
	private Vertex[] v;
	private Color color;
	public Face(Vertex v0, Vertex v1, Vertex v2, Vertex v3, Vertex v4){
		setColor(Color.WHITE);
		v = new Vertex[5];
		v[0]=v0;
		v[1]=v1;
		v[2]=v2;
		v[3]=v3;
		v[4]=v4;
	}
	public Polygon polygon(Rectangle screen, double scale){
		Polygon p = new Polygon();
		for (int i=0; i<5; i++)
			p.addPoint(v[i].screenX(screen), v[i].screenY(screen));
		return p;
	}
	public String toString(){
		String s="[";
		for (Vertex n:v)
			s+=n.toString()+" ";
		return s+"]";
	}
	@Override
	public int compareTo(Face o) {
		return (int)(100.0*this.distanceToViewpoint()-100*o.distanceToViewpoint());
	}
	public double distanceToViewpoint(){
		return center().distance(new Vertex(Vertex.CamX, Vertex.CamY, Vertex.CamZ));
	}
	public Vertex center(){
		double x,y,z;
		x=y=z=0;
		for(Vertex n:v){
			x+=n.getX();
			y+=n.getY();
			z+=n.getZ();		
		}
		return new Vertex(x/5.0, y/5.0, z/5.0);
	}
	public Polygon getPolygon(Rectangle screen, double yAxis, double xAxis){
		Polygon p = new Polygon();
		for (int i=0; i<5; i++){
			Point pt = v[i].screenXY(screen, yAxis, xAxis);
			p.addPoint(pt.x, pt.y);
		}
		return p;
	}
	public Polygon getOrthoPolygon(Rectangle screen, double yAxis, double xAxis){
		Polygon p = new Polygon();
		for (int i=0; i<5; i++){
			Point pt = v[i].orthoXY(screen, yAxis, xAxis);
			p.addPoint(pt.x, pt.y);
		}
		return p;
	}
	public Color getColor() {
		return color;
	}
	public Color getCyan() {
		return new Color(0, 0, color.getBlue(), color.getTransparency());
	}
	public Color getRed() {
		return new Color(color.getRed(),0, 0, color.getTransparency());
	}
	public void setColor(Color color) {
		this.color = new Color(color.getRed(), color.getGreen(), color.getBlue(), 128);
	}
}