Solved: Manually call physicsSpace.update

MySnake · December 23, 2018, 5:32pm

Hello!

I can’t use the SimpleApplication class so I created a custom updater for the PhysicsSpace.
I try to manually call the update method of my physicsSpace but nothing move… What’s wrong ?

To update the physicsSpace I use :
physicsSpace.update(tpf);

I try to add a custom controller in the PhysicsSpace :
physicsSpace.add(new SimpleController());

I the controller I have the default update method where I put a simple log to know if the method is called:

@Override
public void update(float tpf) {
System.out.println(“SimpleController.update”);
}

The message is never called !
My SimpleController extends AbstractPhysicsControl. And I implemented the addPhysics method:

@Override
protected void addPhysics(PhysicsSpace space) {
space.addTickListener(this);
}

This method is called, so it’s good…
You can see that I use a trickListener too. And the methods prePhysicsTick et physicsTick are called, it’s also good

Why is my update method never called?

Ali_RS · December 23, 2018, 5:47pm

Can you try with adding physicsSpace.distributeEvents(); after physicsSpace.update(tpf);

MySnake · December 23, 2018, 5:51pm

Thanks for the quick response!
I tried to call distributeEvents… But it still doesn’t work

MySnake · December 23, 2018, 5:58pm

Should I manually call update ?

Ali_RS · December 23, 2018, 5:59pm

Note you can only add PhysicsControl or Spatial with PhysicsControl

See

github.com

jMonkeyEngine/jmonkeyengine/blob/697b4a675e916c329c38f637a7374e2abcdff766/jme3-jbullet/src/main/java/com/jme3/bullet/PhysicsSpace.java#L426


      
          public <V> Future<V> enqueue(Callable<V> callable) {
              AppTask<V> task = new AppTask<V>(callable);
              pQueue.add(task);
              return task;
          }
          
          /**
           * adds an object to the physics space
           * @param obj the PhysicsControl or Spatial with PhysicsControl to add
           */
          public void add(Object obj) {
              if (obj == null) return;
              if (obj instanceof PhysicsControl) {
                  ((PhysicsControl) obj).setPhysicsSpace(this);
              } else if (obj instanceof Spatial) {
                  Spatial node = (Spatial) obj;
                  for (int i = 0; i < node.getNumControls(); i++) {
                      if (node.getControl(i) instanceof PhysicsControl) {
                          add(((PhysicsControl) node.getControl(i)));
                      }
                  }

MySnake · December 23, 2018, 6:05pm

My SimpleController extends AbstractPhysicsControl.
And AbstractPhysicsControl implements PhysicsControl.
So normally no problem ?

MySnake · December 23, 2018, 6:06pm

I found !!!
It’s only the Spatial that call the update method !
(Spatial.java at line 736)

Thanks @Ali_RS

Ali_RS · December 23, 2018, 6:16pm

You’re welcome

btw, this is an example of using PhysicsSpace directly, outside of BulletAppState. You might find it helpful

github.com

Simsilica/SiO2/blob/master/extensions/bullet/src/main/java/com/simsilica/bullet/BulletSystem.java

/*
 * $Id$
 * 
 * Copyright (c) 2018, Simsilica, LLC
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in 
 *    the documentation and/or other materials provided with the 
 *    distribution.
 * 
 * 3. Neither the name of the copyright holder nor the names of its 
 *    contributors may be used to endorse or promote products derived

This file has been truncated. show original

The whole demo is here

pspeed · December 23, 2018, 9:24pm

Why?

…or any RigidBody, etc… you can use JME’s bullet without ever creating a Control.

You beat me to it.