TransparentTest.java

import com.jme3.app.SimpleApplication;
import com.jme3.material.Material;
import com.jme3.material.RenderState;
import com.jme3.math.FastMath;
import com.jme3.math.Vector3f;
import com.jme3.renderer.RenderManager;
import com.jme3.renderer.ViewPort;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.control.AbstractControl;
import com.jme3.scene.shape.Quad;

/**
 * Created by MichaelZuegg on 26.11.2014.
 */
public class TransparentTest extends SimpleApplication {
    @Override
    public void simpleInitApp() {
        flyCam.setMoveSpeed(10f);
        cam.setLocation(Vector3f.UNIT_Z.mult(10));
        cam.lookAt(Vector3f.ZERO, Vector3f.UNIT_Y.clone());
        final Material material = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        final Geometry head = new Geometry("Head", new Quad(10, 10));

        head.setMaterial(material.clone());
        head.getMaterial().setTexture("ColorMap", assetManager.loadTexture("sprite_head.png"));
        head.getMaterial().getAdditionalRenderState().setBlendMode(RenderState.BlendMode.Alpha);
        final Geometry body = new Geometry("Head", new Quad(20, 40));
        body.setMaterial(material.clone());
        body.getMaterial().setTexture("ColorMap", assetManager.loadTexture("sprite_body.png"));
        body.getMaterial().getAdditionalRenderState().setBlendMode(RenderState.BlendMode.Alpha);
        Node headNode = new Node();
        Node bodyNode = new Node();
        headNode.attachChild(head);
        headNode.addControl(new AbstractControl() {
            @Override
            protected void controlUpdate(float tpf) {
                spatial.rotate(0, 0, 50 * tpf * FastMath.DEG_TO_RAD);
            }

            @Override
            protected void controlRender(RenderManager rm, ViewPort vp) {

            }
        });
        head.setLocalTranslation(-5, -5, 0.001f); //z fighting offset
        bodyNode.attachChild(body);
        bodyNode.addControl(new AbstractControl() {
            @Override
            protected void controlUpdate(float tpf) {
                spatial.rotate(0, 0, -50 * tpf * FastMath.DEG_TO_RAD);
            }

            @Override
            protected void controlRender(RenderManager rm, ViewPort vp) {

            }
        });
        body.setLocalTranslation(-10, -35, 0);
        rootNode.attachChild(headNode);
        rootNode.attachChild(bodyNode);
        rootNode.setLocalScale(0.1f);
    }

    public static void main(String[] args) {
        final TransparentTest transparentTest = new TransparentTest();
        transparentTest.setShowSettings(false);
        transparentTest.start();
    }
}