LoadingGameState spinning "barber's pole" progress bar

Troubleshooting General Help
1

i'm wondering if anyone has implemented a spinning "barber's pole" progress bar for the LoadingGameState? some of my users think my game is stalled when the progress bar doesn't move for a few seconds. i tried using a textured cylinder rotating like a barrel but couldn't get it to appear correctly. (see below)



i guess i could use a quad and move a texture across it, thereby simulating the barber's pole. but if someone else has already built it, i'd be happy :slight_smile:


   protected void init() {
      [...]
      progressCylinder = new Cylinder("Cylinder", 20, 20, 20, 120);
      progressCylinder.setRenderQueueMode(Renderer.QUEUE_ORTHO);
      progressCylinder.setRenderState(mytexturestate);
      progressCylinder.updateRenderState();
      rootNode.attachChild(progressCylinder);
      [...]
   }

   public void update(float tpf) {
      cylinderRotation += tpf;
      progressCylinder.setLocalRotation(quat(cylinderRotation));
      rootNode.updateGeometricState(tpf, true);
   }

   private Quaternion quat(float r) {
      Quaternion rotation = new Quaternion();
      rotation.fromAngles(r, 0,  0);     
      return rotation;
   }



2

animating the texture's translation vector would be a lot easier and cheaper.

3

I think you don't want to render the cylinder in ortho queue.

Then you need a bit Light to get the Texture to show (the light is disabled by default in the LoadingGamestate.

And then you need to rotate the cylinder properly.



I fixed your example :)  maybe thats more what you want:



package loadinganim;

import jmetest.curve.TestBezierCurve;

import com.jme.image.Texture;
import com.jme.math.FastMath;
import com.jme.math.Quaternion;
import com.jme.math.Vector3f;
import com.jme.scene.Node;
import com.jme.scene.shape.Cylinder;
import com.jme.scene.state.CullState;
import com.jme.scene.state.LightState;
import com.jme.scene.state.TextureState;
import com.jme.system.DisplaySystem;
import com.jme.util.TextureManager;
import com.jmex.game.state.load.LoadingGameState;

public class AnimationGamestate extends LoadingGameState {
    private Node cylinderNode ;
    private Cylinder progressCylinder;
    private TextureState mytexturestate;
    private float cylinderRotation = 0.3f;
   
    public AnimationGamestate() {
        cylinderNode = new Node("cylNode");
        progressCylinder = new Cylinder("Cylinder", 20, 20, 2, 20);
        progressCylinder.setLocalRotation(new Quaternion().fromAngleAxis(FastMath.HALF_PI, Vector3f.UNIT_Y));
        cylinderNode.attachChild(progressCylinder);
        cylinderNode.setLocalTranslation(0, 5, 0);
        rootNode.attachChild(cylinderNode);
       
        mytexturestate = DisplaySystem.getDisplaySystem().getRenderer()
                            .createTextureState();
        mytexturestate.setTexture(
                TextureManager.loadTexture(
                        TestBezierCurve.class.getClassLoader().getResource(
                        "jmetest/data/images/Monkey.jpg"),
                        Texture.MM_LINEAR,
                        Texture.FM_LINEAR));
        progressCylinder.setRenderState(mytexturestate);
        CullState cs = DisplaySystem.getDisplaySystem().getRenderer().createCullState();
        cs.setCullMode(CullState.CS_BACK);
        progressCylinder.setRenderState(cs);
        rootNode.setLightCombineMode(LightState.INHERIT);
        rootNode.updateRenderState();
    }

    public AnimationGamestate(int steps) {
        super(steps);
    }

    @Override
    public void update(float tpf) {
        super.update(tpf);
        cylinderRotation += tpf;
        cylinderNode.setLocalRotation(quat(cylinderRotation));
        rootNode.updateGeometricState(tpf, true);
    }
   
    private Quaternion quat(float r) {
        Quaternion rotation = new Quaternion();
        rotation.fromAngles(r, 0,  0);     
        return rotation;
    }
}




edit:
to use it you can alter the TestLoadingGamestate:


        // Create LoadingGameState and enable
        // LoadingGameState loading = new LoadingGameState();
        GameTaskQueueManager.getManager().update(new Callable<Object>() {
            public Object call() throws Exception {
                loading = new AnimationGamestate();
                return null;
            }
       
        }).get();

4

works great. thanks!