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31  */
32 
33 package jme3test.post;
34 
35 import com.jme3.app.SimpleApplication;
36 import com.jme3.material.Material;
37 import com.jme3.renderer.RenderManager;
38 import com.jme3.renderer.Renderer;
39 import com.jme3.scene.Geometry;
40 import com.jme3.scene.Node;
41 import com.jme3.scene.shape.Sphere;
42 import com.jme3.texture.FrameBuffer;
43 import com.jme3.texture.Image.Format;
44 import com.jme3.texture.Texture2D;
45 import com.jme3.ui.Picture;
46 
47 /**
48  * Demonstrates FrameBuffer usage.
49  * The scene is first rendered to an FB with a texture attached,
50  * the texture is then rendered onto the screen in ortho mode.
51  *
52  * @author Kirill
53  */
54 public class TestFBOPassthrough extends SimpleApplication {
55 
56     private Node fbNode = new Node("Framebuffer Node");
57     private FrameBuffer fb;
58 
main(String[] args)59     public static void main(String[] args){
60         TestFBOPassthrough app = new TestFBOPassthrough();
61         app.start();
62     }
63 
64     @Override
simpleInitApp()65     public void simpleInitApp() {
66         int w = settings.getWidth();
67         int h = settings.getHeight();
68 
69         //setup framebuffer
70         fb = new FrameBuffer(w, h, 1);
71 
72         Texture2D fbTex = new Texture2D(w, h, Format.RGBA8);
73         fb.setDepthBuffer(Format.Depth);
74         fb.setColorTexture(fbTex);
75 
76         // setup framebuffer's scene
77         Sphere sphMesh = new Sphere(20, 20, 1);
78         Material solidColor = assetManager.loadMaterial("Common/Materials/RedColor.j3m");
79 
80         Geometry sphere = new Geometry("sphere", sphMesh);
81         sphere.setMaterial(solidColor);
82         fbNode.attachChild(sphere);
83 
84         //setup main scene
85         Picture p = new Picture("Picture");
86         p.setPosition(0, 0);
87         p.setWidth(w);
88         p.setHeight(h);
89         p.setTexture(assetManager, fbTex, false);
90 
91         rootNode.attachChild(p);
92     }
93 
94     @Override
simpleUpdate(float tpf)95     public void simpleUpdate(float tpf){
96         fbNode.updateLogicalState(tpf);
97         fbNode.updateGeometricState();
98     }
99 
100     @Override
simpleRender(RenderManager rm)101     public void simpleRender(RenderManager rm){
102         Renderer r = rm.getRenderer();
103 
104         //do FBO rendering
105         r.setFrameBuffer(fb);
106 
107         rm.setCamera(cam, false); // FBO uses current camera
108         r.clearBuffers(true, true, true);
109         rm.renderScene(fbNode, viewPort);
110         rm.flushQueue(viewPort);
111 
112         //go back to default rendering and let
113         //SimpleApplication render the default scene
114         r.setFrameBuffer(null);
115     }
116 
117 }
118