eu.mihosoft.jcsg.samples.Egg Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jcsg Show documentation

Java implementation of BSP based CSG (Constructive Solid Geometry)

There is a newer version: 0.5.7

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package eu.mihosoft.jcsg.samples;

import eu.mihosoft.vvecmath.Transform;
import eu.mihosoft.jcsg.*;
import eu.mihosoft.jcsg.CSG;
import eu.mihosoft.jcsg.Cube;
import eu.mihosoft.jcsg.FileUtil;
import eu.mihosoft.jcsg.Sphere;

import java.io.IOException;
import java.nio.file.Paths;

/**
 * Average Chicken Egg.
 * @author Michael Hoffer <[email protected]>
 */
public class Egg {

    public CSG toCSG() {
        double radius = 22;
        double stretch = 1.50;
        int resolution = 64;

        // cube that cuts the spheres
        CSG cube = new Cube(2*stretch*radius).toCSG();
        cube = cube.transformed(Transform.unity().translateZ(stretch*radius));

        // stretched sphere
        CSG upperHalf = new Sphere(radius, resolution, resolution/2).toCSG().
                transformed(Transform.unity().scaleZ(stretch));
        
        // upper half
        upperHalf = upperHalf.intersect(cube);
        
        CSG lowerHalf = new Sphere(radius, resolution, resolution/2).toCSG();
        lowerHalf = lowerHalf.difference(cube);
        
         // stretch lower half
        lowerHalf = lowerHalf.transformed(Transform.unity().scaleZ(stretch*0.72));
        
        CSG egg = upperHalf.union(lowerHalf);
        
        return egg;
    }

    public static void main(String[] args) throws IOException {
        FileUtil.write(Paths.get("egg.stl"), new Egg().toCSG().toStlString());
    }
}