source: java/main/src/main/java/com/framsticks/visualization/Viewer.java @ 85

package com.framsticks.visualization;

import com.framsticks.util.io.Encoding;
import com.sun.j3d.loaders.IncorrectFormatException;
import com.sun.j3d.loaders.ParsingErrorException;
import com.sun.j3d.loaders.Scene;
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.universe.PlatformGeometry;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.universe.ViewingPlatform;

import javax.media.j3d.*;
import javax.swing.*;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3f;
import java.awt.*;
import java.io.*;

import org.apache.log4j.Logger;

public class Viewer {

        private static Logger log = Logger.getLogger(Viewer.class);

        Canvas3D canvas3d;
        SimpleUniverse universe;

        public Viewer() {
                super();

                init();
        }

        public BranchGroup createSceneGraph() {
                // Create the root of the branch graph
                BranchGroup objRoot = new BranchGroup();

                // Create a Transform group to scale all objects so they
                // appear in the scene.
                TransformGroup objScale = new TransformGroup();
                Transform3D t3d = new Transform3D();
                t3d.setScale(0.7);
                objScale.setTransform(t3d);
                objRoot.addChild(objScale);

                TransformGroup objTrans = new TransformGroup();
                objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
                objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
                objScale.addChild(objTrans);

                String filename = "/visualization/models/cylinder.obj";
                int flags = ObjectFile.RESIZE;
                flags |= ObjectFile.TRIANGULATE;
                flags |= ObjectFile.STRIPIFY;
                double creaseAngle = 60.0;
                ObjectFile f = new ObjectFile(flags,
                                (float) (creaseAngle * Math.PI / 180.0));
                Scene s = null;
                try {
                        InputStream is = this.getClass().getResourceAsStream(filename);
                        s = f.load(new InputStreamReader(is, Encoding.getDefaultCharset()));
                } catch (FileNotFoundException | ParsingErrorException | IncorrectFormatException e) {
                        log.fatal("fatal error", e);
                        return null;
                }

                objTrans.addChild(s.getSceneGroup());

                BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);

                Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f);
                Background bgNode = new Background(bgColor);
                bgNode.setApplicationBounds(bounds);
                objRoot.addChild(bgNode);

                return objRoot;
        }

        private void init() {

                JTextPane textPane = new JTextPane();
                textPane.setEditable(false);

                GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();

                // Create a Canvas3D using the preferred configuration
                canvas3d = new Canvas3D(config);

                // Create simple universe with view branch
                universe = new SimpleUniverse(canvas3d);
                BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);

                // add mouse behaviours to the ViewingPlatform
                ViewingPlatform viewingPlatform = universe.getViewingPlatform();

                PlatformGeometry platformGeometry = new PlatformGeometry();

                // Set up the ambient light
                Color3f ambientColor = new Color3f(0.1f, 0.1f, 0.1f);
                AmbientLight ambientLightNode = new AmbientLight(ambientColor);
                ambientLightNode.setInfluencingBounds(bounds);
                platformGeometry.addChild(ambientLightNode);

                // Set up the directional lights
                Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
                Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f);
                Color3f light2Color = new Color3f(1.0f, 1.0f, 1.0f);
                Vector3f light2Direction = new Vector3f(-1.0f, -1.0f, -1.0f);

                DirectionalLight light1 = new DirectionalLight(light1Color,
                                light1Direction);
                light1.setInfluencingBounds(bounds);
                platformGeometry.addChild(light1);

                DirectionalLight light2 = new DirectionalLight(light2Color,
                                light2Direction);
                light2.setInfluencingBounds(bounds);
                platformGeometry.addChild(light2);

                viewingPlatform.setPlatformGeometry(platformGeometry);

                viewingPlatform.setNominalViewingTransform();

                // Ensure at least 5 msec per frame (i.e., < 200Hz)
                universe.getViewer().getView().setMinimumFrameCycleTime(5);

                BranchGroup scene = new BranchGroup();
                BranchGroup content = createSceneGraph();

                // canvas3d.addMouseListener(behaviour);
                TransformGroup transformGroup = new TransformGroup(new Transform3D());
                transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
                transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
                MouseRotate behaviour = new MouseRotate();
                behaviour.setTransformGroup(transformGroup);
                transformGroup.addChild(behaviour);
                // behaviour.addListener(canvas3d);
                // behaviour.initialize();
                behaviour.setSchedulingBounds(new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0));
                transformGroup.addChild(content);
                // transformGroup.addChild(behaviour);
                scene.addChild(transformGroup);

                universe.addBranchGraph(scene);
                canvas3d.startRenderer();
                Dimension d = new Dimension(500, 500);
                canvas3d.setMinimumSize(d);
                canvas3d.setSize(d);
        }

        public Component getViewComponent() {
                return canvas3d;
        }


}