HelloAnimation.java

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package jme3test.helloworld;

import com.jme3.anim.AnimComposer;
import com.jme3.anim.tween.Tween;
import com.jme3.anim.tween.Tweens;
import com.jme3.anim.tween.action.Action;
import com.jme3.anim.tween.action.BlendSpace;
import com.jme3.anim.tween.action.LinearBlendSpace;
import com.jme3.app.SimpleApplication;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.light.DirectionalLight;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.scene.Node;

/**
 * Sample 7 - Load an OgreXML model and play some of its animations.
 */
public class HelloAnimation extends SimpleApplication {

  private Action advance;
  private AnimComposer control;

  public static void main(String[] args) {
    HelloAnimation app = new HelloAnimation();
    app.start();
  }

  @Override
  public void simpleInitApp() {
    viewPort.setBackgroundColor(ColorRGBA.LightGray);
    initKeys();

    /* Add a light source so we can see the model */
    DirectionalLight dl = new DirectionalLight();
    dl.setDirection(new Vector3f(-0.1f, -1f, -1).normalizeLocal());
    rootNode.addLight(dl);

    /* Load a gltf model that contains animation */
    Node player = (Node) assetManager.loadModel("Models/Oto/Oto.gltf");
    player.setLocalScale(0.5f);
    rootNode.attachChild(player);

    /* Use the model's AnimComposer to play its "stand" animation clip. */
    control = player.getControl(AnimComposer.class);
    control.setCurrentAction("stand");

    /* Compose an animation action named "halt"
       that transitions from "Walk" to "stand" in half a second. */
    BlendSpace quickBlend = new LinearBlendSpace(0f, 0.5f);
    Action halt = control.actionBlended("halt", quickBlend, "stand", "Walk");
    halt.setLength(0.5);

    /* Compose an animation action named "advance"
       that walks for one cycle, then halts, then invokes onAdvanceDone(). */
    Action walk = control.action("Walk");
    Tween doneTween = Tweens.callMethod(this, "onAdvanceDone");
    advance = control.actionSequence("advance", walk, halt, doneTween);
  }

  /**
   * Callback to indicate that the "advance" animation action has completed.
   */
  void onAdvanceDone() {
    /*
     * Play the "stand" animation action.
     */
    control.setCurrentAction("stand");
  }

  /**
   * Map the spacebar to the "Walk" input action, and add a listener to initiate
   * the "advance" animation action each time it's pressed.
   */
  private void initKeys() {
    inputManager.addMapping("Walk", new KeyTrigger(KeyInput.KEY_SPACE));

    ActionListener handler = new ActionListener() {
      @Override
      public void onAction(String name, boolean keyPressed, float tpf) {
        if (keyPressed && control.getCurrentAction() != advance) {
          control.setCurrentAction("advance");
        }
      }
    };
    inputManager.addListener(handler, "Walk");
  }

}