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      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
      7  * met:
      8  *
      9  * * Redistributions of source code must retain the above copyright
     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
     27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     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 
     33 package jme3test.post;
     34 
     35 import com.jme3.app.SimpleApplication;
     36 import com.jme3.input.KeyInput;
     37 import com.jme3.input.controls.ActionListener;
     38 import com.jme3.input.controls.KeyTrigger;
     39 import com.jme3.material.Material;
     40 import com.jme3.math.ColorRGBA;
     41 import com.jme3.math.FastMath;
     42 import com.jme3.math.Quaternion;
     43 import com.jme3.math.Vector3f;
     44 import com.jme3.renderer.Camera;
     45 import com.jme3.renderer.ViewPort;
     46 import com.jme3.scene.Geometry;
     47 import com.jme3.scene.shape.Box;
     48 import com.jme3.texture.FrameBuffer;
     49 import com.jme3.texture.Image.Format;
     50 import com.jme3.texture.Texture;
     51 import com.jme3.texture.Texture2D;
     52 
     53 /**
     54  * This test renders a scene to a texture, then displays the texture on a cube.
     55  */
     56 public 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