public class hw8bis extends MISApplet {

	spherebis[] spheres=new spherebis[2];
        light L[]=new light[2];
        //light L[]=new light[1];
	double[] orig=new double[] {0.0,0.0,0.0};	
	double fL=3.0;
	double[] v=new double[3];
	double[] w=new double[3];
	double[][][] rgbD;

	public void initialize(){		
	    spheres=new spherebis[2];
		spheres[0]=new spherebis(0.8, new material(), -0.2, 0, -5);
		material mtruc=new material();
		mtruc.setAmbient(new double[] {0.1,0.1,0.1});
		mtruc.setSpecular(new double[] {1,1,1});
		mtruc.setDiffuse(new double[] {0.3,0,0});
		mtruc.p=5;
		spheres[1]=new spherebis(1, mtruc, 0.5, 0.3, -4);
		L[0]=new light();
		L[0].setDir(new double[] {0,1,0});
		L[0].setRgb(new double[] {1,1,1});
		L[1]=new light();
		L[1].setDir(new double[] {-0.5,0.3,-0.4});
		L[1].setRgb(new double[] {1,1,1});
		v[0]=0;
		v[1]=0;
		v[2]=0;
		rgbD=new double[W][H][3];
	}

	public void initFrame(double time) {
		L[0].setDir(new double[] {0,Math.sin(time),Math.cos(time)});
		for (int i=0;i<W;i++)
			for (int j=0;j<H;j++){

			w[0]=(double) (i-W/2)/(W/2);
			w[1]=(double) (H/2-j)/(W/2);
			w[2]=-fL;
			w=normalize(w);

			rgbD[i][j]=rayTrace(v,w);
			}
			


	}
	public void setPixel(int x, int y, int rgb[]) {

		for (int j=0;j<3;j++){
			rgb[j]=(int)(255*rgbD[x][y][j]);	
			if (rgb[j]>255) rgb[j]=255;
		}
	
	}
	//---------------------------------------------------------

	public double[] rayTrace(double[] v, double[] w){
		double t=10000;
		int ind=-1;
		double[] res=new double[3];
		for (int i=0; i< spheres.length; i++){
			double tc=spheres[i].intersect(v,w);
			if (tc<t & t>0){
				t=tc;
				ind=i;

			}
		}
		if (ind>=0){
		    res=spheres[ind].shade(L,v,w,t);// add fields in sphere to keep values of the intersection and "prepare" shading if it is indeed shaded
		    //res=spheres[ind].shade(spheres,L,v,w,t);// add fields in sphere to keep values of the intersection and "prepare" shading if it is indeed shaded
		}
		return res;
	}
	
	public double[] normalize(double[] vs){
		int n=vs.length;
		double norm=0;
		for (int i=0; i<n; ++i){
			norm+=vs[i]*vs[i];
		}
		double[] res=new double[n];
		if(norm!=0)
			for (int i=0; i<n; ++i){
				res[i]=vs[i]/Math.sqrt(norm);
			}
		return res;
	}





}