/*
 * vec2dTest.java
 *
 * Created on March 23, 2007, 4:19 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */


/**
 *
 * @author Sui Huang
 */
public class vec2dTest {
   
    private static void dispVec(vec2d v, String name){
        System.out.println( name+"=("+Double.toString(v.getX())+","
                           +Double.toString(v.getY())+")");
    }
    public static void main(String[] args) {
        vec2d ux, uy, v0, v1, v2, v3, v4;
        ux = new vec2d(1,0);
        uy = new vec2d(0,1);
        v0 = new vec2d(0,0);
        v1 = new vec2d(1,1);
        v2 = vec2d.add(vec2d.mul(-3,v1), new vec2d(0,-1));
        v3 = vec2d.proj(v2,v1);
        v4 = vec2d.add(v2,vec2d.mul(-1,v3));
        
        System.out.println("basic constructor test");
        dispVec(ux, "ux");
        dispVec(uy, "uy");
        dispVec(v0, "v0");
        dispVec(v1, "v1");
        dispVec(v2, "v2=-3*v1+(0,-1)");
        dispVec(v3, "v3=proj(v2,v1) ");
        dispVec(v4, "v4=v2-v3       ");
        System.out.println();
        
        System.out.print("further constructor test");
        vec2d t;
        t = ux.clone(); t.normalize();
        dispVec(t, "normalized ux = ");
        t = uy.clone(); t.normalize();
        dispVec(t, "normalized uy = ");
        try{
        t = v0.clone(); t.normalize();
        dispVec(t, "normalized v0 = ");
        }catch (java.lang.IllegalStateException e){
            System.out.println("caught exception successfully");
        }catch (java.lang.Exception e){
            System.out.println("couldn't catch the expected exception");
        }
        t = v2.clone(); t.normalize();
        dispVec(t, "normalized v2 = ");
        t = v3.clone(); t.normalize();
        dispVec(t, "normalized v3 = ");
        t = v4.clone(); t.normalize();
        dispVec(t, "normalized v4 = ");
        System.out.println();
        
        System.out.println("test triangleArea()");
        try{
            System.out.println("area(v0,v0,v0)="+Double.toString(vec2d.triangleArea(v0,v0,v0)));
            System.out.println("area(v0,v0,v1)="+Double.toString(vec2d.triangleArea(v0,v0,v1)));
            System.out.println("area(v0,ux,uy)="+Double.toString(vec2d.triangleArea(v0,ux,uy)));
            System.out.println("area(v1,ux,v0)="+Double.toString(vec2d.triangleArea(v1,ux,v0)));
            
        }catch(Exception e){
            System.out.println("caught unexpected exception");
        }
        System.out.println();
        
        try{
            boolean b;
            if ((vec2d.coline(v1,v1,v1)==true)&&
                (vec2d.coline(v0,v1,v1)==true)&&
                (vec2d.coline(v0,v1,v2)==false))
            {
                System.out.println("coline() test passed");
            }else{
                System.out.println("coline() test failed");
            }
        }catch(Exception e){
            System.out.println("coline() test failed with unexpected exception");
        }
    }
    
}