vertexattrtestcg.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: VertexAttrTestCg.java,v $
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
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 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
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 * $Revision: 1.3 $
 * $Date: 2006/03/06 17:14:52 $
 * $State: Exp $
 */
package org.jdesktop.j3d.examples.cg_shader;

import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.shader.StringIO;
import javax.media.j3d.*;
import java.awt.GraphicsConfiguration;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import org.jdesktop.j3d.examples.Resources;


public class VertexAttrTestCg extends javax.swing.JFrame {

    SimpleUniverse univ = null;
    BranchGroup scene = null;

    public BranchGroup createSceneGraph(boolean hasVertexAttrs) {

        // Bounds for BG and behavior
        BoundingSphere bounds =
                new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

        // Create the root of the branch graph
        BranchGroup objRoot = new BranchGroup();
        objRoot.setCapability(BranchGroup.ALLOW_DETACH);

        // Set up the background
        Color3f bgColor   = new Color3f(0.1f, 0.1f, 0.1f);
        Background bg = new Background(bgColor);
        bg.setApplicationBounds(bounds);
        objRoot.addChild(bg);

        // Create the TransformGroup node and initialize it to the
        // identity. Enable the TRANSFORM_WRITE capability so that
        // our behavior code can modify it at run time. Add it to
        // the root of the subgraph.
        TransformGroup objTrans = new TransformGroup();
        objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRoot.addChild(objTrans);

        // Create a simple Shape3D node; add it to the scene graph.
        objTrans.addChild(new MyShape(this, hasVertexAttrs));
        
        return objRoot;
    }
    
    private Canvas3D initScene() {
        GraphicsConfiguration config =
                SimpleUniverse.getPreferredConfiguration();
        
        Canvas3D c = new Canvas3D(config);
        
        univ = new SimpleUniverse(c);

        // Add a ShaderErrorListener
        univ.addShaderErrorListener(new ShaderErrorListener() {
            public void errorOccurred(ShaderError error) {
                error.printVerbose();
                JOptionPane.showMessageDialog(VertexAttrTestCg.this,
                              error.toString(),
                              "ShaderError",
                              JOptionPane.ERROR_MESSAGE);
            }
        });

        ViewingPlatform viewingPlatform = univ.getViewingPlatform();
        // This will move the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        viewingPlatform.setNominalViewingTransform();
        
        return c;
    }
    
    /**
     * Creates new form VertexAttrTestCg
     */
    public VertexAttrTestCg() {
        // Initialize the GUI components
        initComponents();
        
        // Create the scene and add the Canvas3D to the drawing panel
        Canvas3D c = initScene();
        drawingPanel.add(c, java.awt.BorderLayout.CENTER);
    }
    
    static class MyShape extends Shape3D {
        // Coordinate data
        private static final float[] coords = {
            0.0f, 0.0f, 0.0f,
            0.5f, 0.0f, 0.0f,
            0.0f, 0.5f, 0.0f,
        };
        
        private static final int[] sizes = { 1, 3 };
        private static final float[] weights = {
            0.45f,
            0.15f,
            0.95f,
        };
        private static final float[] temps = {
            1.0f, 0.5f, 0.5f,
            0.5f, 1.0f, 0.5f,
            0.5f, 0.5f, 1.0f,
        };
        
        private static final String[] vaNames = { "weight", "temperature" };
        
        J3DBuffer createDirectFloatBuffer(float[] arr) {
            ByteOrder order =  ByteOrder.nativeOrder();
            
            FloatBuffer nioBuf = ByteBuffer.allocateDirect(arr.length * 4).order(order).asFloatBuffer();
            nioBuf.put(arr);
            return new J3DBuffer(nioBuf);
        }
        
        
        MyShape(JFrame frame, boolean hasVertexAttrs) {
            
            int vertexFormat = GeometryArray.COORDINATES;
            int vertexAttrCount = 0;
            int[] vertexAttrSizes = null;
            String[] vertexAttrNames = null;
            String[] shaderAttrNames = null;
                      
            if (hasVertexAttrs) {
                vertexFormat |= GeometryArray.VERTEX_ATTRIBUTES;
                vertexAttrCount = vaNames.length;
                vertexAttrSizes = sizes;
                vertexAttrNames = vaNames;
            }
            
            TriangleArray tri = new TriangleArray(6, vertexFormat, 0, null, vertexAttrCount, vertexAttrSizes);
            tri.setValidVertexCount(3);
            tri.setCoordinates(0, coords);
            
            if (hasVertexAttrs) {
                tri.setVertexAttrs(0, 0, weights);
                tri.setVertexAttrs(1, 0, temps);
                
                
                String vertexProgram = null;
                try {
                    vertexProgram = StringIO.readFully(Resources.getResource("cg_shader/vertexshader_vp.cg"));
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
                
                Shader[] shaders = new Shader[1];
                shaders[0] = new SourceCodeShader(Shader.SHADING_LANGUAGE_CG,
                        Shader.SHADER_TYPE_VERTEX,
                        vertexProgram);
                ShaderProgram shaderProgram = new CgShaderProgram();
                shaderProgram.setShaders(shaders);
                shaderProgram.setVertexAttrNames(vertexAttrNames);