public BranchGroup createSceneGraph(URL url) {
try {
Loader loader = new com.sun.j3d.loaders.objectfile.ObjectFile();
Scene scene = loader.load(url);
BranchGroup bg = scene.getSceneGroup();
System.out.println(bg);
TransformGroup[] views = scene.getViewGroups();
if (views != null) {
for (int i = 0; i < views.length; i++) {
System.out.print(views[i]);
}
if (views.length > 0) viewStart = views[0];
}
return bg;
} catch (Exception ex) {
// in case there was a problem, print the stack out
ex.printStackTrace();
// System.out.println(ex);
add("South", new Label(ex.toString()));
System.out.println("URL: " + url);
BranchGroup bg = new BranchGroup();
bg.addChild(new ColorCube());
System.out.println(bg);
return bg;
}
}
public BranchGroup createSceneGraph() {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create the TransformGroup node and initialize it to the
// identity. Enable the TRANSFORM_WRITE capability so that
// our behavior code can modify it at run time. Add it to
// the root of the subgraph.
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot.addChild(objTrans);
// Create a simple Shape3D node; add it to the scene graph.
objTrans.addChild(new ColorCube(0.4));
// Create a new Behavior object that will perform the
// desired operation on the specified transform and add
// it into the scene graph.
Transform3D yAxis = new Transform3D();
Alpha rotationAlpha = new Alpha(-1, 4000);
RotationInterpolator rotator =
new RotationInterpolator(rotationAlpha, objTrans, yAxis, 0.0f, (float) Math.PI * 1.0f);
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
rotator.setSchedulingBounds(bounds);
objRoot.addChild(rotator);
// Have Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
}
// In this method, the objects for the scene are generated and added to
// the SimpleUniverse.
public void createSceneGraph(SimpleUniverse su) {
// *** The root of the graph containing the scene (with a cube and a sphere). ***
BranchGroup theScene = new BranchGroup();
// Generate an Appearance.
Color3f ambientColourShaded = new Color3f(0.0f, 0.4f, 0.4f);
Color3f emissiveColourShaded = new Color3f(0.0f, 0.0f, 0.0f);
Color3f diffuseColourShaded = new Color3f(0.0f, 0.7f, 0.7f);
Color3f specularColourShaded = new Color3f(0.0f, 0.5f, 0.5f);
float shininessShaded = 20.0f;
Appearance shadedApp = new Appearance();
shadedApp.setMaterial(
new Material(
ambientColourShaded,
emissiveColourShaded,
diffuseColourShaded,
specularColourShaded,
shininessShaded));
float r = 0.3f; // The radius of the sphere.
float boxHL = 0.7f * r; // Half the vertex length of the cube.
float shift = 3.0f * r; // Distance between cube and sphere.
// *** The sphere and its transformation group ***
Sphere s = new Sphere(r, Sphere.GENERATE_NORMALS, 100, shadedApp);
Transform3D tfSphere = new Transform3D();
tfSphere.setTranslation(new Vector3f(-0.95f + r, 0.0f, 0.0f));
TransformGroup tgSphere = new TransformGroup(tfSphere);
tgSphere.addChild(s);
theScene.addChild(tgSphere);
// *** The cube and its transformation group ***
Box b2 = new Box(boxHL, boxHL, boxHL, shadedApp);
Transform3D tfBox2 = new Transform3D();
tfBox2.setTranslation(new Vector3f(-0.95f + r + shift, 0.0f, 0.0f));
Transform3D rotation = new Transform3D();
rotation.rotY(Math.PI / 4);
Transform3D rotationX = new Transform3D();
rotationX.rotX(Math.PI / 6);
rotation.mul(rotationX);
tfBox2.mul(rotation);
TransformGroup tgBox2 = new TransformGroup(tfBox2);
tgBox2.addChild(b2);
theScene.addChild(tgBox2);
// Generate a white background.
Background bg = new Background(new Color3f(1.0f, 1.0f, 1.0f));
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), Double.MAX_VALUE);
bg.setApplicationBounds(bounds);
theScene.addChild(bg);
theScene.compile();
// Add the scene to the universe.
su.addBranchGraph(theScene);
}
public World() {
universe = new VirtualUniverse();
locale = new Locale(universe);
viewGroup = new BranchGroup();
objGroup = new BranchGroup();
viewGroup.setCapability(Group.ALLOW_CHILDREN_EXTEND);
objGroup.setCapability(Group.ALLOW_CHILDREN_EXTEND);
}
/**
* Simple algorithm to add or remove an edge from the selection Ideas: 1. Use one shape per quad
* => easy, but can become very fast too big to fit in memory. => pb: flicker when adding /
* removing because the scene is detached 2. Use only one shape, modify geometry TODO: pre-create
* an empty shape to avoid initial flicker
*
* @param on
* @param p
* @param u
* @param v
* @param groupIdx2
*/
protected void toggleSelectedEdge(boolean on, SelectionEdge se) {
if (on) {
// add the given edge to the list
if (edgeSelection.contains(se)) return; // already in
edgeSelection.add(se);
} else {
// remove the given edge from the list
if (!edgeSelection.contains(se)) return; // not present
edgeSelection.remove(se);
if (edgeSelection.size() == 0) {
LineArray la = (LineArray) edgeSelectionShape.getGeometry();
la.setValidVertexCount(0);
return;
}
}
// Use in-memory arrays instead of NIO because edgeSelection should not
// be too big
// => faster
LineArray la =
new LineArray(
edgeSelection.size() * 2,
GeometryArray.COORDINATES | GeometryArray.COLOR_3 | GeometryArray.BY_REFERENCE);
double[] coords = new double[edgeSelection.size() * 2 * 3];
float[] colors = new float[edgeSelection.size() * 2 * 3];
for (int i = 0; i < coords.length; i += 6) {
SelectionEdge edge = edgeSelection.get(i / 6);
edge.updateCoords(grid, coords, i);
edge.updateColors(colors, i);
}
la.setCoordRefDouble(coords);
la.setColorRefFloat(colors);
la.setCapability(GeometryArray.ALLOW_COUNT_WRITE);
// update edgeSelection Shape with the new edgeSelection list
if (edgeSelectionShape == null) {
Appearance a = new Appearance();
// PolygonAttributes pa = new
// PolygonAttributes(PolygonAttributes.POLYGON_LINE,
// PolygonAttributes.CULL_NONE, 0);
// pa.setPolygonOffset(1); // above edges
// pa.setPolygonOffsetFactor(1);
LineAttributes lat = new LineAttributes();
lat.setLineWidth(2.0f);
lat.setLineAntialiasingEnable(true);
a.setLineAttributes(lat);
// a.setPolygonAttributes(pa);
edgeSelectionShape = new Shape3D(la, a);
edgeSelectionShape.setUserData(this);
edgeSelectionShape.setPickable(false);
edgeSelectionShape.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
edgeSelectionShape.setCapability(Shape3D.ALLOW_GEOMETRY_READ);
BranchGroup bg = new BranchGroup();
bg.addChild(edgeSelectionShape);
addChild(bg);
} else edgeSelectionShape.setGeometry(la);
}
// In this method, the objects for the scene are generated and added to
// the SimpleUniverse.
public void createSceneGraph(SimpleUniverse su) {
// Create the root of the branch group for the scene.
BranchGroup theScene = new BranchGroup();
// Generate an Appearance for the sphere.
Color3f ambientColourSphere = new Color3f(0.2f, 0.2f, 0.2f);
Color3f emissiveColourSphere = new Color3f(0.0f, 0.0f, 0.0f);
Color3f diffuseColourSphere = new Color3f(0.6f, 0.6f, 0.6f);
Color3f specularColourSphere = new Color3f(0.5f, 0.5f, 0.5f);
float shininessSphere = 20.0f;
Appearance sphereApp = new Appearance();
sphereApp.setMaterial(
new Material(
ambientColourSphere,
emissiveColourSphere,
diffuseColourSphere,
specularColourSphere,
shininessSphere));
// n spheres with radius r will be shown.
int n = 5;
float r = 0.15f;
float shift = 2 * r + 0.05f; // The distance between the centres of the spheres.
// Arrays for the sphere, their transformations and their transformation groups
// transformation groups (for positioning).
Sphere[] spheres = new Sphere[n];
TransformGroup[] tg = new TransformGroup[n];
Transform3D[] tf = new Transform3D[n];
// Generate the sphere, their transformations and their
// transformation groups. Add everyting to the scene.
for (int i = 0; i < n; i++) {
spheres[i] = new Sphere(r, Sphere.GENERATE_NORMALS, 4 + i * i * i, sphereApp);
tf[i] = new Transform3D();
tf[i].setTranslation(new Vector3f(-0.95f + r + shift * i, 0.0f, 0.0f));
tg[i] = new TransformGroup(tf[i]);
tg[i].addChild(spheres[i]);
theScene.addChild(tg[i]);
}
// Generate a white background.
Background bg = new Background(new Color3f(1.0f, 1.0f, 1.0f));
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 1000.0);
bg.setApplicationBounds(bounds);
theScene.addChild(bg);
theScene.compile();
// Add the scene to the universe.
su.addBranchGraph(theScene);
}
private BranchGroup setApperancePackInBranchGroup(Shape3D shape, Node handle) {
shape.setUserData(this);
shape.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
BranchGroup bg = new BranchGroup();
bg.setCapability(BranchGroup.ALLOW_DETACH);
bg.addChild(handle);
bg.compile();
return bg;
}
/**
* Simple algorithm to add or remove a quad from the selection Ideas: 1. Use one shape per quad =>
* easy, but can become very fast too big to fit in memory. => pb: flicker when adding / removing
* because the scene is detached 2. Use only one shape, modify geometry TODO: pre-create an empty
* shape to avoid initial flicker
*
* @param on
* @param p
* @param u
* @param v
* @param groupIdx2
*/
protected void toggleSelectedQuad(boolean on, SelectionQuad sq) {
LOGGER.finest("on=" + on + " selectionQuad=" + sq);
if (on) {
// add the given quad to the list
if (selection.contains(sq)) return; // already in
selection.add(sq);
} else {
// remove the given quad from the list
if (!selection.contains(sq)) return; // not present
selection.remove(sq);
if (selection.size() == 0) {
QuadArray qa = (QuadArray) selectionShape.getGeometry();
qa.setValidVertexCount(0);
return;
}
}
// Use in-memory arrays instead of NIO because selection should not be
// too big
// => faster
QuadArray qa =
new QuadArray(
selection.size() * 4,
GeometryArray.COORDINATES | GeometryArray.COLOR_3 | GeometryArray.BY_REFERENCE);
float[] coords = new float[selection.size() * 4 * 3];
float[] colors = new float[selection.size() * 4 * 3];
for (int i = 0; i < coords.length; i += 12) {
SelectionQuad quad = selection.get(i / 12);
quad.updateCoords(grid, coords, i);
quad.updateColors(colors, i);
}
qa.setCoordRefFloat(coords);
qa.setColorRefFloat(colors);
qa.setCapability(GeometryArray.ALLOW_COUNT_WRITE);
// update selection Shape with the new selection list
if (selectionShape == null) {
Appearance a = new Appearance();
PolygonAttributes pa =
new PolygonAttributes(PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_NONE, 0);
pa.setPolygonOffset(0.5f); // between faces and edges
pa.setPolygonOffsetFactor(0.5f);
a.setPolygonAttributes(pa);
selectionShape = new Shape3D(qa, a);
selectionShape.setUserData(this);
selectionShape.setPickable(false);
selectionShape.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
selectionShape.setCapability(Shape3D.ALLOW_GEOMETRY_READ);
BranchGroup bg = new BranchGroup();
bg.addChild(selectionShape);
addChild(bg);
} else selectionShape.setGeometry(qa);
}
private void labelAxes()
// Place numbers along the X- and Z-axes at the integer positions
{
Vector3d pt = new Vector3d();
for (int i = -FLOOR_LEN / 2; i <= FLOOR_LEN / 2; i++) {
pt.x = i;
floorBG.addChild(makeText(pt, "" + i)); // along x-axis
}
pt.x = 0;
for (int i = -FLOOR_LEN / 2; i <= FLOOR_LEN / 2; i++) {
pt.z = i;
floorBG.addChild(makeText(pt, "" + i)); // along z-axis
}
} // end of labelAxes()
// Some light is added to the scene here.
public void addLight(SimpleUniverse su) {
BranchGroup bgLight = new BranchGroup();
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), Double.MAX_VALUE);
// Directional light.
Color3f lightColour = new Color3f(1.0f, 1.0f, 1.0f);
Vector3f lightDir = new Vector3f(1.0f, -1.0f, -1.0f);
DirectionalLight light = new DirectionalLight(lightColour, lightDir);
light.setInfluencingBounds(bounds);
bgLight.addChild(light);
// Ambient light.
Color3f ambientLightColour = new Color3f(0.5f, 0.5f, 0.5f);
AmbientLight ambLight = new AmbientLight(ambientLightColour);
ambLight.setInfluencingBounds(bounds);
bgLight.addChild(ambLight);
su.addBranchGraph(bgLight);
}
public CheckerFloor()
// create tiles, add origin marker, then the axes labels
{
ArrayList blueCoords = new ArrayList();
ArrayList greenCoords = new ArrayList();
floorBG = new BranchGroup();
boolean isBlue;
for (int z = -FLOOR_LEN / 2; z <= (FLOOR_LEN / 2) - 1; z++) {
isBlue = (z % 2 == 0) ? true : false; // set colour for new row
for (int x = -FLOOR_LEN / 2; x <= (FLOOR_LEN / 2) - 1; x++) {
if (isBlue) createCoords(x, z, blueCoords);
else createCoords(x, z, greenCoords);
isBlue = !isBlue;
}
}
floorBG.addChild(new ColouredTiles(blueCoords, blue));
floorBG.addChild(new ColouredTiles(greenCoords, green));
addOriginMarker();
labelAxes();
} // end of CheckerFloor()
// Directional light rotating around the scene and some ambient light.
public void addLight(SimpleUniverse su) {
BranchGroup bgLight = new BranchGroup();
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), Double.MAX_VALUE);
// Directional light (to be rotated).
Color3f lightColour = new Color3f(1.0f, 1.0f, 1.0f);
Vector3f lightDir = new Vector3f(0.0f, 0.0f, -1.0f);
DirectionalLight light = new DirectionalLight(lightColour, lightDir);
light.setInfluencingBounds(bounds);
// The transformation group for the directional light and its rotation.
TransformGroup tfmLight = new TransformGroup();
tfmLight.addChild(light);
// The Alpha for the rotation.
Alpha alphaLight = new Alpha(-1, 4000);
// The rotation
RotationInterpolator rot =
new RotationInterpolator(
alphaLight, tfmLight, new Transform3D(), 0.0f, (float) Math.PI * 2);
rot.setSchedulingBounds(bounds);
tfmLight.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
tfmLight.addChild(rot);
bgLight.addChild(tfmLight);
// Ambient light.
Color3f ambientLightColour = new Color3f(0.5f, 0.5f, 0.5f);
AmbientLight ambLight = new AmbientLight(ambientLightColour);
ambLight.setInfluencingBounds(bounds);
bgLight.addChild(ambLight);
su.addBranchGraph(bgLight);
}
private void addOriginMarker()
// A red square centered at (0,0,0), of length 0.5
{ // points created counter-clockwise, a bit above the floor
Point3f p1 = new Point3f(-0.25f, 0.01f, 0.25f);
Point3f p2 = new Point3f(0.25f, 0.01f, 0.25f);
Point3f p3 = new Point3f(0.25f, 0.01f, -0.25f);
Point3f p4 = new Point3f(-0.25f, 0.01f, -0.25f);
ArrayList oCoords = new ArrayList();
oCoords.add(p1);
oCoords.add(p2);
oCoords.add(p3);
oCoords.add(p4);
floorBG.addChild(new ColouredTiles(oCoords, medRed));
} // end of addOriginMarker();
public ObjectViewer(URL url) {
setLayout(new BorderLayout());
Canvas3D canvas3D = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
add("Center", canvas3D);
BoundingSphere bounds = new BoundingSphere(new Point3d(), 1000);
BranchGroup root = new BranchGroup();
BranchGroup scene = createSceneGraph(url);
scene.setBoundsAutoCompute(true);
System.out.println(scene.getBounds());
BoundingSphere sceneBounds = new BoundingSphere(scene.getBounds());
SimpleUniverse univ = new SimpleUniverse(canvas3D);
ViewingPlatform view = univ.getViewingPlatform();
view.setNominalViewingTransform();
Transform3D t = new Transform3D();
TransformGroup viewTransform = view.getViewPlatformTransform();
t.set(new Vector3d(0, 0, 3 * sceneBounds.getRadius()));
viewTransform.setTransform(t);
BranchGroup lights = new BranchGroup();
Light light = new AmbientLight();
light.setInfluencingBounds(bounds);
lights.addChild(light);
light = new DirectionalLight();
light.setInfluencingBounds(bounds);
lights.addChild(light);
root.addChild(lights);
TransformGroup tg = new TransformGroup();
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
tg.addChild(scene);
root.addChild(tg);
MouseRotate mouse = new MouseRotate();
mouse.setTransformGroup(tg);
mouse.setSchedulingBounds(bounds);
root.addChild(mouse);
MouseZoom mousezoom = new MouseZoom();
mousezoom.setTransformGroup(tg);
mousezoom.setSchedulingBounds(bounds);
root.addChild(mousezoom);
Background background = new Background(1, 1, 1);
background.setApplicationBounds(bounds);
root.addChild(background);
root.compile();
univ.addBranchGraph(root);
}
public void activate() {
viewGroup.compile();
objGroup.compile();
locale.addBranchGraph(viewGroup);
locale.addBranchGraph(objGroup);
}
public void addChild(Node obj) {
objGroup.addChild(obj);
}
public void addBehavior(Behavior behavior) {
viewGroup.addChild(behavior);
}
public void addViewer(Viewer viewer) {
viewGroup.addChild(viewer.getRoot());
}
