1/*
2 * Copyright (c) 2009-2010 jMonkeyEngine
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
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8 *
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10 *   notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above copyright
13 *   notice, this list of conditions and the following disclaimer in the
14 *   documentation and/or other materials provided with the distribution.
15 *
16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
17 *   may be used to endorse or promote products derived from this software
18 *   without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package jme3test.post;
34
35import com.jme3.app.SimpleApplication;
36import com.jme3.input.KeyInput;
37import com.jme3.input.controls.ActionListener;
38import com.jme3.input.controls.KeyTrigger;
39import com.jme3.material.Material;
40import com.jme3.math.ColorRGBA;
41import com.jme3.math.FastMath;
42import com.jme3.math.Quaternion;
43import com.jme3.math.Vector3f;
44import com.jme3.renderer.Camera;
45import com.jme3.renderer.ViewPort;
46import com.jme3.scene.Geometry;
47import com.jme3.scene.shape.Box;
48import com.jme3.texture.FrameBuffer;
49import com.jme3.texture.Image.Format;
50import com.jme3.texture.Texture;
51import com.jme3.texture.Texture2D;
52
53/**
54 * This test renders a scene to a texture, then displays the texture on a cube.
55 */
56public class TestRenderToTexture extends SimpleApplication implements ActionListener {
57
58    private static final String TOGGLE_UPDATE = "Toggle Update";
59    private Geometry offBox;
60    private float angle = 0;
61    private ViewPort offView;
62
63    public static void main(String[] args){
64        TestRenderToTexture app = new TestRenderToTexture();
65        app.start();
66    }
67
68    public Texture setupOffscreenView(){
69        Camera offCamera = new Camera(512, 512);
70
71        offView = renderManager.createPreView("Offscreen View", offCamera);
72        offView.setClearFlags(true, true, true);
73        offView.setBackgroundColor(ColorRGBA.DarkGray);
74
75        // create offscreen framebuffer
76        FrameBuffer offBuffer = new FrameBuffer(512, 512, 1);
77
78        //setup framebuffer's cam
79        offCamera.setFrustumPerspective(45f, 1f, 1f, 1000f);
80        offCamera.setLocation(new Vector3f(0f, 0f, -5f));
81        offCamera.lookAt(new Vector3f(0f, 0f, 0f), Vector3f.UNIT_Y);
82
83        //setup framebuffer's texture
84        Texture2D offTex = new Texture2D(512, 512, Format.RGBA8);
85        offTex.setMinFilter(Texture.MinFilter.Trilinear);
86        offTex.setMagFilter(Texture.MagFilter.Bilinear);
87
88        //setup framebuffer to use texture
89        offBuffer.setDepthBuffer(Format.Depth);
90        offBuffer.setColorTexture(offTex);
91
92        //set viewport to render to offscreen framebuffer
93        offView.setOutputFrameBuffer(offBuffer);
94
95        // setup framebuffer's scene
96        Box boxMesh = new Box(Vector3f.ZERO, 1,1,1);
97        Material material = assetManager.loadMaterial("Interface/Logo/Logo.j3m");
98        offBox = new Geometry("box", boxMesh);
99        offBox.setMaterial(material);
100
101        // attach the scene to the viewport to be rendered
102        offView.attachScene(offBox);
103
104        return offTex;
105    }
106
107    @Override
108    public void simpleInitApp() {
109        cam.setLocation(new Vector3f(3, 3, 3));
110        cam.lookAt(Vector3f.ZERO, Vector3f.UNIT_Y);
111
112        //setup main scene
113        Geometry quad = new Geometry("box", new Box(Vector3f.ZERO, 1,1,1));
114
115        Texture offTex = setupOffscreenView();
116
117        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
118        mat.setTexture("ColorMap", offTex);
119        quad.setMaterial(mat);
120        rootNode.attachChild(quad);
121        inputManager.addMapping(TOGGLE_UPDATE, new KeyTrigger(KeyInput.KEY_SPACE));
122        inputManager.addListener(this, TOGGLE_UPDATE);
123    }
124
125    @Override
126    public void simpleUpdate(float tpf){
127        Quaternion q = new Quaternion();
128
129        if (offView.isEnabled()) {
130            angle += tpf;
131            angle %= FastMath.TWO_PI;
132            q.fromAngles(angle, 0, angle);
133
134            offBox.setLocalRotation(q);
135            offBox.updateLogicalState(tpf);
136            offBox.updateGeometricState();
137        }
138    }
139
140    @Override
141    public void onAction(String name, boolean isPressed, float tpf) {
142        if (name.equals(TOGGLE_UPDATE) && isPressed) {
143            offView.setEnabled(!offView.isEnabled());
144        }
145    }
146
147
148}
149