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.model.shape; 34 35 import com.jme3.app.SimpleApplication; 36 import com.jme3.material.Material; 37 import com.jme3.math.ColorRGBA; 38 import com.jme3.math.Vector2f; 39 import com.jme3.math.Vector3f; 40 import com.jme3.scene.Geometry; 41 import com.jme3.scene.Mesh; 42 import com.jme3.scene.VertexBuffer.Type; 43 import com.jme3.util.BufferUtils; 44 45 /** 46 * How to create custom meshes by specifying vertices 47 * We render the mesh in three different ways, once with a solid blue color, 48 * once with vertex colors, and once with a wireframe material. 49 * @author KayTrance 50 */ 51 public class TestCustomMesh extends SimpleApplication { 52 main(String[] args)53 public static void main(String[] args){ 54 TestCustomMesh app = new TestCustomMesh(); 55 app.start(); 56 } 57 58 @Override simpleInitApp()59 public void simpleInitApp() { 60 61 Mesh m = new Mesh(); 62 63 // Vertex positions in space 64 Vector3f [] vertices = new Vector3f[4]; 65 vertices[0] = new Vector3f(0,0,0); 66 vertices[1] = new Vector3f(3,0,0); 67 vertices[2] = new Vector3f(0,3,0); 68 vertices[3] = new Vector3f(3,3,0); 69 70 // Texture coordinates 71 Vector2f [] texCoord = new Vector2f[4]; 72 texCoord[0] = new Vector2f(0,0); 73 texCoord[1] = new Vector2f(1,0); 74 texCoord[2] = new Vector2f(0,1); 75 texCoord[3] = new Vector2f(1,1); 76 77 // Indexes. We define the order in which mesh should be constructed 78 int [] indexes = {2,0,1,1,3,2}; 79 80 // Setting buffers 81 m.setBuffer(Type.Position, 3, BufferUtils.createFloatBuffer(vertices)); 82 m.setBuffer(Type.TexCoord, 2, BufferUtils.createFloatBuffer(texCoord)); 83 m.setBuffer(Type.Index, 1, BufferUtils.createIntBuffer(indexes)); 84 m.updateBound(); 85 86 // ************************************************************************* 87 // First mesh uses one solid color 88 // ************************************************************************* 89 90 // Creating a geometry, and apply a single color material to it 91 Geometry geom = new Geometry("OurMesh", m); 92 Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); 93 mat.setColor("Color", ColorRGBA.Blue); 94 geom.setMaterial(mat); 95 96 // Attaching our geometry to the root node. 97 rootNode.attachChild(geom); 98 99 // ************************************************************************* 100 // Second mesh uses vertex colors to color each vertex 101 // ************************************************************************* 102 Mesh cMesh = m.clone(); 103 Geometry coloredMesh = new Geometry ("ColoredMesh", cMesh); 104 Material matVC = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); 105 matVC.setBoolean("VertexColor", true); 106 107 //We have 4 vertices and 4 color values for each of them. 108 //If you have more vertices, you need 'new float[yourVertexCount * 4]' here! 109 float[] colorArray = new float[4*4]; 110 int colorIndex = 0; 111 112 //Set custom RGBA value for each Vertex. Values range from 0.0f to 1.0f 113 for(int i = 0; i < 4; i++){ 114 // Red value (is increased by .2 on each next vertex here) 115 colorArray[colorIndex++]= 0.1f+(.2f*i); 116 // Green value (is reduced by .2 on each next vertex) 117 colorArray[colorIndex++]= 0.9f-(0.2f*i); 118 // Blue value (remains the same in our case) 119 colorArray[colorIndex++]= 0.5f; 120 // Alpha value (no transparency set here) 121 colorArray[colorIndex++]= 1.0f; 122 } 123 // Set the color buffer 124 cMesh.setBuffer(Type.Color, 4, colorArray); 125 coloredMesh.setMaterial(matVC); 126 // move mesh a bit so that it doesn't intersect with the first one 127 coloredMesh.setLocalTranslation(4, 0, 0); 128 rootNode.attachChild(coloredMesh); 129 130 // /** Alternatively, you can show the mesh vertixes as points 131 // * instead of coloring the faces. */ 132 // cMesh.setMode(Mesh.Mode.Points); 133 // cMesh.setPointSize(10f); 134 // cMesh.updateBound(); 135 // cMesh.setStatic(); 136 // Geometry points = new Geometry("Points", m); 137 // points.setMaterial(mat); 138 // rootNode.attachChild(points); 139 140 // ************************************************************************* 141 // Third mesh will use a wireframe shader to show wireframe 142 // ************************************************************************* 143 Mesh wfMesh = m.clone(); 144 Geometry wfGeom = new Geometry("wireframeGeometry", wfMesh); 145 Material matWireframe = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); 146 matWireframe.setColor("Color", ColorRGBA.Green); 147 matWireframe.getAdditionalRenderState().setWireframe(true); 148 wfGeom.setMaterial(matWireframe); 149 wfGeom.setLocalTranslation(4, 4, 0); 150 rootNode.attachChild(wfGeom); 151 152 } 153 } 154