I would like to ask the realization principle of collision detection,  I saw examples of that on the collision detection, but still very unclear, such as the following code, cube is how to detect a collision with those objects, and collision detection is how to achieve，

// Move method
public void move() {
if (up) {
SimpleVector t = cube.getZAxis();
t.scalarMul(SPEED);
moveRes.add(t);
}
if (down) {
SimpleVector t = cube.getZAxis();
t.scalarMul(-SPEED);
moveRes.add(t);
}
if (left) {
cube.rotateY((float) Math.toRadians(-1));
}
if (right) {
cube.rotateY((float) Math.toRadians(1));
}
// Avoid high speed
if (moveRes.length() > SPEED) {
moveRes.makeEqualLength(new SimpleVector(0, 0, MAXSPEED));
}
cube.translate(0, -0.02f, 0);

// collisionEllipsoid
cube.checkForCollisionEllipsoid(moveRes, ellipsoid, 8);
cube.translate(moveRes);

SimpleVector t = new SimpleVector(0, 1, 0);
t = cube.checkForCollisionEllipsoid(t, ellipsoid, 1);
cube.translate(t);

// damping
if (moveRes.length() > DAMPING) {
moveRes.makeEqualLength(new SimpleVector(0, 0, DAMPING));
} else {
moveRes = new SimpleVector(0, 0, 0);
}
}


Can be displayed with JPCT, why not display it in the android, which is perplexing problem.

Thank you for your help, now I have a new question to ask your advice. I had five balls of different sizes with 3dMax, when I use the frame of animation only shows the first frame, I do not know why, I also searched the forum-related information, but still failed to resolve, the following I Show me the code to stick in here, I hope you can help me.

thing = loadModel("s0.3DS", scale);
Animation anim = new Animation(5);

anim.createSubSequence("default");
anim.addKeyFrame(thing.getMesh());

anim.createSubSequence("change");
anim.addKeyFrame(loadModel("s2.3DS", scale).getMesh());
anim.addKeyFrame(loadModel("s3.3DS", scale).getMesh());
anim.addKeyFrame(loadModel("s4.3DS", scale).getMesh());
anim.addKeyFrame(loadModel("s1.3DS", scale).getMesh());
thing.setAnimationSequence(anim);

thing.build();
world.addObject(thing);


private Object3D loadModel(String fileName, float scale) {
Loader.setVertexOptimization(false);
Object3D[] model = Loader.load3DS(LoadFile.loadf(fileName), scale);
Object3D o3d = new Object3D(0);
Object3D temp = null;

for (int i = 0; i < model.length; i++) {
temp = model[i];
temp.setCenter(SimpleVector.ORIGIN);
temp.rotateX((float) (Math.PI / 2));
temp.rotateMesh();
temp.setRotationMatrix(new Matrix());
o3d = Object3D.mergeObjects(o3d, temp);
o3d.build();
}
return o3d;
}

public void doAnim() {
{
ind += 0.02f;
if (ind > 1f) {
ind -= 1f;
}
}
thing.animate(ind, an);
}


well,i guess i found it,maybe the file is too large

      I have loaded the 3ds file and texture image , but there have some question which i can't resolve.
I think it is the same as this picturehttp://hi.csdn.net/space-3965048-do-album-picid-786468.html,
but it is like thishttp://hi.csdn.net/space-3965048-do-album-picid-786468-goto-down.html .

can you give me some suggestion ,If necessary, I will attach the source code

Hello everybody, I ask where you can download more examples JPCT-AE, I would like to learn a good bit more JPCT-AE knowledge.