/** Draw a fractal tree.
*/ 

import javax.media.opengl.*;
import javax.media.opengl.glu.*;

public class FractalTree{

    public static void tree(GL gl, int level){

        //draw trunk
        GLU glu = new GLU();
        GLUquadric qobj = glu.gluNewQuadric();
        glu.gluQuadricDrawStyle(qobj, GLU.GLU_FILL);
	glu.gluQuadricTexture(qobj, true);
        gl.glPushMatrix();
        gl.glRotated(-90,1,0,0);
        glu.gluCylinder(qobj, 0.4, 0.2, 5.0, 8, 4);
        gl.glPopMatrix();

	if (level<=0) return;
	//draw limbs
        gl.glPushMatrix();
	gl.glTranslated(0,1,0);
        gl.glRotated(40,0,0,1);
        gl.glScaled(0.5,0.5,0.5);
        tree(gl, level - 1);
        gl.glPopMatrix();
        
        gl.glPushMatrix();
	gl.glTranslated(0,2,0);
        gl.glRotated(30,1,0,0);
        gl.glScaled(0.5,0.5,0.5);
        tree(gl, level - 1);
        gl.glPopMatrix();
        
        gl.glPushMatrix();
	gl.glTranslated(0,3,0);
        gl.glRotated(-25,0,0,1);
        gl.glScaled(0.5,0.5,0.5);
        tree(gl, level - 1);
        gl.glPopMatrix();
        
        gl.glPushMatrix();
	gl.glTranslated(0,4,0);
        gl.glRotated(-20,1,0,0);
        gl.glScaled(0.5,0.5,0.5);
        tree(gl, level - 1);
        gl.glPopMatrix();

        gl.glPushMatrix();
	gl.glTranslated(0,5,0);
        gl.glScaled(0.5,0.5,0.5);
        tree(gl, level - 1);
        gl.glPopMatrix();
        
    } 

}