jmonkeyengine/jme3-examples/src/main/java/jme3test/renderer/TestBlendEquations.java

/*
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package jme3test.renderer;

import com.jme3.app.SimpleApplication;
import com.jme3.light.DirectionalLight;
import com.jme3.material.Material;
import com.jme3.material.RenderState;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.renderer.queue.RenderQueue;
import com.jme3.scene.Geometry;
import com.jme3.scene.shape.Quad;

public class TestBlendEquations extends SimpleApplication {

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

    public void simpleInitApp() {
        Geometry teaGeom = (Geometry) assetManager.loadModel("Models/Teapot/Teapot.obj");
        teaGeom.scale(6);
        teaGeom.getMaterial().getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.Add);
        teaGeom.move(0, -2f, 0);

        DirectionalLight dl = new DirectionalLight();
        dl.setColor(ColorRGBA.Red);
        dl.setDirection(Vector3f.UNIT_XYZ.negate());

        rootNode.addLight(dl);
        rootNode.attachChild(teaGeom);

        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        mat.setColor("Color", new ColorRGBA(0.5f, 0f, 1f, 0.3f));
        mat.getAdditionalRenderState().setBlendMode(RenderState.BlendMode.Color);
        mat.getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.Subtract);

        Geometry geo = new Geometry("BottomLeft", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
        geo.setMaterial(mat);
        geo.setQueueBucket(RenderQueue.Bucket.Gui);
        geo.setLocalTranslation(0, 0, 1);

        guiNode.attachChild(geo);

        Material m = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        m.getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.ReverseSubtract);
        m.setColor("Color", new ColorRGBA(0.0f, 1f, 1.f, 1f));
        m.getAdditionalRenderState().setBlendMode(RenderState.BlendMode.AlphaAdditive);

        geo = new Geometry("BottomRight", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
        geo.setMaterial(m);
        geo.setQueueBucket(RenderQueue.Bucket.Gui);
        geo.setLocalTranslation(guiViewPort.getCamera().getWidth() / 2, 0, 1);
        
        guiNode.attachChild(geo);
        
        m = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        m.getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.Min);
        m.setColor("Color", new ColorRGBA(0.3f, 0f, 0.1f, 0.3f));
        m.getAdditionalRenderState().setBlendMode(RenderState.BlendMode.Additive);

        geo = new Geometry("TopRight", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
        geo.setMaterial(m);
        geo.setQueueBucket(RenderQueue.Bucket.Gui);
        geo.setLocalTranslation(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2, 1);

        guiNode.attachChild(geo);

        geo = new Geometry("OverTeaPot", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
        geo.setMaterial(mat);
        geo.setQueueBucket(RenderQueue.Bucket.Transparent);
        geo.setLocalTranslation(0, -100, 5);

        rootNode.attachChild(geo);

    }


}