Morph Cone to Cylinder!

[aRTx]

Hi,

based on it (Morphing Pyramid2Cube):

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import java.util.Enumeration;

import javax.media.j3d.Alpha;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.Behavior;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.Morph;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.WakeupOnElapsedFrames;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.SimpleUniverse;

public class Pyramid2Cube extends Applet {

  private SimpleUniverse u = null;

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

    // Create a Transformgroup to scale all objects so they
    // appear in the scene.
    TransformGroup objScale = new TransformGroup();
    Transform3D t3d = new Transform3D();
    t3d.setScale(0.4);
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);

    // Create a bounds for the background and behavior
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);

    // Set up the background
    Color3f bgColor = new Color3f(0.05f, 0.05f, 0.2f);
    Background bg = new Background(bgColor);
    bg.setApplicationBounds(bounds);
    objScale.addChild(bg);

    //
    // Create the transform group nodes for the 3 original objects
    // and the morphed object. Add them to the root of the
    // branch graph.
    //
    TransformGroup objTrans[] = new TransformGroup[4];

    for (int i = 0; i < 4; i++) {
      objTrans[i] = new TransformGroup();
      objScale.addChild(objTrans[i]);
    }

    Transform3D tr = new Transform3D();
    Transform3D rotY15 = new Transform3D();
    rotY15.rotY(15.0 * Math.PI / 180.0);

    objTrans[0].getTransform(tr);
    tr.setTranslation(new Vector3d(-3.0, 1.5, -6.5));
    tr.mul(rotY15);
    objTrans[0].setTransform(tr);

    objTrans[1].getTransform(tr);
    tr.setTranslation(new Vector3d(0.0, 1.5, -6.5));
    tr.mul(rotY15);
    objTrans[1].setTransform(tr);

    objTrans[2].getTransform(tr);
    tr.setTranslation(new Vector3d(3.0, 1.5, -6.5));
    tr.mul(rotY15);
    objTrans[2].setTransform(tr);

    objTrans[3].getTransform(tr);
    tr.setTranslation(new Vector3d(0.0, -2.0, -5.0));
    tr.mul(rotY15);
    objTrans[3].setTransform(tr);

    // Now create simple geometries.

    QuadArray g[] = new QuadArray[3];
    Shape3D shape[] = new Shape3D[3];
    for (int i = 0; i < 3; i++) {
      g[i] = null;
      shape[i] = null;
    }

    g[0] = new ColorPyramidUp();
    g[1] = new ColorCube();
    g[2] = new ColorPyramidDown();

    Appearance a = new Appearance();

    for (int i = 0; i < 3; i++) {
      shape[i] = new Shape3D(g[i], a);
      objTrans[i].addChild(shape[i]);
    }

    //
    // Create a Morph node, and set the appearance and input geometry
    // arrays. Set the Morph node's capability bits to allow the weights
    // to be modified at runtime.
    //
    Morph morph = new Morph((GeometryArray[]) g, a);
    morph.setCapability(Morph.ALLOW_WEIGHTS_READ);
    morph.setCapability(Morph.ALLOW_WEIGHTS_WRITE);

    objTrans[3].addChild(morph);

    // Now create the Alpha object that controls the speed of the
    // morphing operation.
    Alpha morphAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE
        | Alpha.DECREASING_ENABLE, 0, 0, 4000, 1000, 500, 4000, 1000,
        500);

    // Finally, create the morphing behavior
    MorphingBehavior mBeh = new MorphingBehavior(morphAlpha, morph);
    mBeh.setSchedulingBounds(bounds);
    objScale.addChild(mBeh);

    return objRoot;
  }

  public Pyramid2Cube() {
  }

  public void init() {
    setLayout(new BorderLayout());
    GraphicsConfiguration config = SimpleUniverse
        .getPreferredConfiguration();

    Canvas3D c = new Canvas3D(config);
    add("Center", c);

    // Create a simple scene and attach it to the virtual universe
    BranchGroup scene = createSceneGraph();
    u = new SimpleUniverse(c);

    // This will move the ViewPlatform back a bit so the
    // objects in the scene can be viewed.
    u.getViewingPlatform().setNominalViewingTransform();

    u.addBranchGraph(scene);
  }

  public void destroy() {
    u.cleanup();
  }

  public static void main(String[] args) {
    new MainFrame(new Pyramid2Cube(), 700, 700);
  }
}

class ColorPyramidUp extends QuadArray {
  private static final float[] verts = {
  // front face
      1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -1.0f,
      -1.0f, 1.0f,
      // back face
      -1.0f, -1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
      -1.0f, -1.0f,
      // right face
      1.0f, -1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
      -1.0f, 1.0f,
      // left face
      -1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, -1.0f,
      -1.0f, -1.0f,
      // top face
      0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
      0.0f,
      // bottom face
      -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f,
      -1.0f, 1.0f, };

  private static final float[] colors = {

  // front face (cyan)
      0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
      1.0f,
      // back face (magenta)
      1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f,
      1.0f,
      // right face (yellow)
      1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
      0.0f,
      // left face (blue)
      0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
      1.0f,
      // top face (green)
      0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
      0.0f,
      // bottom face (red)
      1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
      0.0f,

  };

  ColorPyramidUp() {
    super(24, QuadArray.COORDINATES | QuadArray.COLOR_3);

    setCoordinates(0, verts);
    setColors(0, colors);
  }
}

class ColorCube extends QuadArray {
  private static final float[] verts = {
  // front face
      1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f,
      -1.0f, 1.0f,
      // back face
      -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f,
      -1.0f, -1.0f,
      // right face
      1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
      -1.0f, 1.0f,
      // left face
      -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, -1.0f, -1.0f,
      -1.0f, -1.0f,
      // top face
      1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f,
      1.0f, 1.0f,
      // bottom face
      -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f,
      -1.0f, 1.0f, };

  private static final float[] colors = {
  // front face (red)
      1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
      0.0f,
      // back face (green)
      0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
      0.0f,
      // right face (blue)
      0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
      1.0f,
      // left face (yellow)
      1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
      0.0f,
      // top face (magenta)
      1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f,
      1.0f,
      // bottom face (cyan)
      0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
      1.0f, };

  ColorCube() {
    super(24, QuadArray.COORDINATES | QuadArray.COLOR_3);

    setCoordinates(0, verts);
    setColors(0, colors);
  }
}

class ColorPyramidDown extends QuadArray {
  private static final float[] verts = {
  // front face
      0.0f, -1.0f, 0.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f,
      -1.0f, 0.0f,
      // back face
      0.0f, -1.0f, 0.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 0.0f,
      -1.0f, 0.0f,
      // right face
      0.0f, -1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
      -1.0f, 0.0f,
      // left face
      0.0f, -1.0f, 0.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 0.0f,
      -1.0f, 0.0f,
      // top face
      1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f,
      1.0f, 1.0f,
      // bottom face
      0.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
      -1.0f, 0.0f, };

  private static final float[] colors = {
  // front face (green)
      0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
      0.0f,
      // back face (red)
      1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
      0.0f,
      // right face (yellow)
      1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
      0.0f,
      // left face (magenta)
      1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f,
      1.0f,
      // top face (blue)
      0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
      1.0f,
      // bottom face (cyan)
      0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
      1.0f, };

  ColorPyramidDown() {
    super(24, QuadArray.COORDINATES | QuadArray.COLOR_3);

    setCoordinates(0, verts);
    setColors(0, colors);
  }
}

//User-defined morphing behavior class

class MorphingBehavior extends Behavior {

  Alpha alpha;

  Morph morph;

  double weights[];

  WakeupOnElapsedFrames w = new WakeupOnElapsedFrames(0);

  // Override Behavior's initialize method to setup wakeup criteria
  public void initialize() {
    alpha.setStartTime(System.currentTimeMillis());

    // Establish initial wakeup criteria
    wakeupOn(w);
  }

  // Override Behavior's stimulus method to handle the event
  public void processStimulus(Enumeration criteria) {

    // NOTE: This assumes 3 objects. It should be generalized to
    // "n" objects.

    double val = alpha.value();
    if (val < 0.5) {
      double a = val * 2.0;
      weights[0] = 1.0 - a;
      weights[1] = a;
      weights[2] = 0.0;
    } else {
      double a = (val - 0.5) * 2.0;
      weights[0] = 0.0;
      weights[1] = 1.0f - a;
      weights[2] = a;
    }

    morph.setWeights(weights);

    // Set wakeup criteria for next time
    wakeupOn(w);
  }

  public MorphingBehavior(Alpha a, Morph m) {
    alpha = a;
    morph = m;
    weights = morph.getWeights();
  }
}

How to Morph from Cone to Cylinder?

[aRTx]

pls...
help me!
I need this

[OrangeDog]

It's exactly the same transformation (square thing to pointy thing), but in reverse. Work out the maths then code it up.