src/de/gamezock/metacraft/data/Triangle.java


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package de.gamezock.metacraft.data;

import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;

public class Triangle {
  private Point3f[] vertices;
  private Vector3f[] normals;
  
  
  public Triangle(Point3f v1, Point3f v2, Point3f v3) {
    vertices = new Point3f[3];
    
    vertices[0] = v1;
    vertices[1] = v2;
    vertices[2] = v3;
    
    normals = new Vector3f[3];
    
    Vector3f edge1 = new Vector3f(), edge2 = new Vector3f();
    edge1.sub(v1, v2);
    edge2.sub(v3, v2);
    
    Vector3f normal = new Vector3f();
    normal.cross(edge1, edge2);
    normal.normalize();
    
    normals[0] = new Vector3f(normal);
    normals[1] = new Vector3f(normal);
    normals[2] = new Vector3f(normal);
  }
  
  public Point3f getVertex(int i) {
    return vertices[i];
  }
  
  public Vector3f getNormal(int i) {
    return normals[i];
  }
}