eu.mihosoft.vrl.v3d.samples.Moebiusband 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.vrl.v3d.samples;

import eu.mihosoft.vrl.v3d.CSG;
import eu.mihosoft.vrl.v3d.Extrude;
import eu.mihosoft.vrl.v3d.FileUtil;
import eu.mihosoft.vrl.v3d.Transform;
import eu.mihosoft.vrl.v3d.Vector3d;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Michael Hoffer <[email protected]>
 */
public class Moebiusband {

    public CSG toCSG() {

        double width = 10;
        double height = 20;

        List points = Arrays.asList(
                new Vector3d(-width / 2, -height / 2),
                new Vector3d(width / 2, -height / 2),
                new Vector3d(width / 2, height / 2),
                new Vector3d(-width / 2, height / 2));

        List originalFacets = new ArrayList<>();

        List facets = new ArrayList<>();

        CSG prev = null;

        for (int i = 0; i < 10; i++) {

            Transform t = Transform.unity().translateZ(2).rotZ(i);

            CSG facet = Extrude.points(new Vector3d(0, 0, 1), points);

            if (prev != null) {
                facets.add(facet.union(prev).hull());
            }

            originalFacets.add(facet);

            points.stream().forEach((p) -> t.transform(p));

            prev = facet;
        }

        CSG result = facets.get(0);

        for (int i = 1; i < facets.size(); i++) {
            result = result.union(facets.get(i));
        }

        CSG originalResult = originalFacets.get(0);

        for (int i = 1; i < facets.size(); i++) {
            originalResult = originalResult.union(originalFacets.get(i));
        }

        return result.union(originalResult.transformed(Transform.unity().translateX(width * 2)));
    }

    public static void main(String[] args) throws IOException {

        System.out.println("RUNNING");

        FileUtil.write(Paths.get("möbiusband.stl"), new Moebiusband().toCSG().toStlString());

    }
}