/** Draw a surface of revolution
*/ 

import javax.media.opengl.*;

public class SurfaceOfRevolution{

    //default profile -- a wine glass
    static double[][] profile = {{0.26,0},{0.26,0},{0.09,0.02},{0.07,0.02},{0.04,0.05},{0.02,0.05},{0.02,0.38},{0.05,0.46},{0.14,0.56},{0.41,0.98},{0.4,0.99},{0.11,0.57},{0.04,0.51},{0,0.5}};


    public static void surface(GL gl, int level){
	surface(gl,level,profile);
    }


    //surface of revolution given array containing points of the profile
    // profile[0][0] is x coord of first point, 
    // profile[0][1] is y coord of first point, 
    public static void surface(GL gl, int level, double[][] profile){

        double h = 1.0f/level;
	for (int i = 1; i < profile.length; i++){
            double s = i/(double)profile.length;
	    gl.glBegin(GL.GL_TRIANGLE_STRIP);
	    for (int j = 0; j <= level; j++){
		double t = j*h;
		double angle = t*2.0*Math.PI;
		double cos = Math.cos(angle);
		double sin = Math.sin(angle);
		gl.glNormal3d(cos,0.0,sin); //normal to a circle is radius

		gl.glTexCoord2d(s-h,t);
		gl.glVertex3d(profile[i-1][0]*cos,profile[i-1][1],profile[i-1][0]*sin);
		gl.glTexCoord2d(s,t);
		gl.glVertex3d(profile[i][0]*cos,profile[i][1],profile[i][0]*sin);


	    }
	    gl.glEnd();
	}
    }

}