phongshadingglsl.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: PhongShadingGLSL.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,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
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 * $Revision: 1.5 $
 * $Date: 2006/03/03 18:26:39 $
 * $State: Exp $
 */

package org.jdesktop.j3d.examples.glsl_shader;

import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.shader.StringIO;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.swing.JOptionPane;
import javax.vecmath.*;
import java.awt.GraphicsConfiguration;
import java.io.IOException;
import org.jdesktop.j3d.examples.Resources;

/**
 *
 * @author  kcr
 */
public class PhongShadingGLSL extends javax.swing.JFrame {

    // Constants for type of light to use
    private static final int DIRECTIONAL_LIGHT = 0;
    private static final int POINT_LIGHT = 1;
    private static final int SPOT_LIGHT = 2;

    // Flag indicates type of lights: directional, point, or spot lights.
    private static int lightType = DIRECTIONAL_LIGHT;

    private SimpleUniverse univ = null;

    private ShaderAppearance sApp = null;
    private ShaderProgram gouraudSP = null;
    private ShaderProgram phongSP = null;

    public BranchGroup createSceneGraph() {
        Color3f eColor    = new Color3f(0.0f, 0.0f, 0.0f);
        Color3f sColor    = new Color3f(1.0f, 1.0f, 1.0f);
        Color3f objColor  = new Color3f(0.6f, 0.6f, 0.6f);
//        Color3f lColor1   = new Color3f(1.0f, 0.0f, 0.0f);
//        Color3f lColor2   = new Color3f(0.0f, 1.0f, 0.0f);
        Color3f lColor1   = new Color3f(1.0f, 1.0f, 0.5f);
        Color3f alColor   = new Color3f(0.2f, 0.2f, 0.2f);
        Color3f bgColor   = new Color3f(0.05f, 0.05f, 0.2f);

        Transform3D t;

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

        // Create a Transformgroup to scale all objects so they
        // appear in the scene.
        TransformGroup objScale = new TransformGroup();
        Transform3D t3d = new Transform3D();
        t3d.setScale(0.5);
        objScale.setTransform(t3d);
        objRoot.addChild(objScale);

        // Create a bounds for the background and lights
        BoundingSphere bounds =
            new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

        // Set up the background
        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);
        objScale.addChild(objTrans);

        // Create a Sphere object, generate one copy of the sphere,
        // and add it into the scene graph.
        sApp = new ShaderAppearance();
        sApp.setCapability(ShaderAppearance.ALLOW_SHADER_PROGRAM_WRITE);
        Material m = new Material(objColor, eColor, objColor, sColor, 100.0f);
        sApp.setMaterial(m);

        // Create Gouraud and Phong shader programs
        String vertexProgram = null;
        String fragmentProgram = null;
        Shader[] shaders = new Shader[2];
        String[] attrNames = { "numLights" };

        try {
            vertexProgram = StringIO.readFully(Resources.getResource("glsl_shader/gouraud.vert"));
            fragmentProgram = StringIO.readFully(Resources.getResource("glsl_shader/gouraud.frag"));
        }
        catch (IOException e) {
            throw new RuntimeException(e);
        }
        shaders[0] = new SourceCodeShader(Shader.SHADING_LANGUAGE_GLSL,
                                          Shader.SHADER_TYPE_VERTEX,
                                          vertexProgram);
        shaders[1] = new SourceCodeShader(Shader.SHADING_LANGUAGE_GLSL,
                                          Shader.SHADER_TYPE_FRAGMENT,
                                          fragmentProgram);
        gouraudSP = new GLSLShaderProgram();
        gouraudSP.setShaders(shaders);

        try {
            vertexProgram = StringIO.readFully(Resources.getResource("glsl_shader/phong.vert"));
            fragmentProgram = StringIO.readFully(Resources.getResource("glsl_shader/phong.frag"));
        }
        catch (IOException e) {
            throw new RuntimeException(e);
        }
        shaders[0] = new SourceCodeShader(Shader.SHADING_LANGUAGE_GLSL,
                                          Shader.SHADER_TYPE_VERTEX,
                                          vertexProgram);
        shaders[1] = new SourceCodeShader(Shader.SHADING_LANGUAGE_GLSL,
                                          Shader.SHADER_TYPE_FRAGMENT,
                                          fragmentProgram);
        phongSP = new GLSLShaderProgram();
        phongSP.setShaders(shaders);

        if (gouraudButton.isSelected()) {
            sApp.setShaderProgram(gouraudSP);
        } else if (phongButton.isSelected()) {
            sApp.setShaderProgram(phongSP);
        }
        Sphere sph = new Sphere(1.0f, Sphere.GENERATE_NORMALS, 30, sApp);
        objTrans.addChild(sph);

        // Create a new Behavior object that will perform the
        // desired operation on the specified transform and add
        // it into the scene graph.
        Transform3D yAxis = new Transform3D();
        yAxis.rotZ(Math.PI);
        Alpha rotationAlpha = new Alpha(-1, 10000);

        RotationInterpolator rotator =
            new RotationInterpolator(rotationAlpha, objTrans, yAxis,
                                     0.0f, (float) Math.PI*2.0f);
        rotator.setSchedulingBounds(bounds);
        objRoot.addChild(rotator);

        // Create the transform group node for the each light and initialize
        // it to the identity.  Enable the TRANSFORM_WRITE capability so that
        // our behavior code can modify it at runtime.  Add them to the root
        // of the subgraph.
        TransformGroup l1RotTrans = new TransformGroup();
        l1RotTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objScale.addChild(l1RotTrans);

        TransformGroup l2RotTrans = new TransformGroup();
        l2RotTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objScale.addChild(l2RotTrans);

        // Create transformations for the positional lights
        t = new Transform3D();
        Vector3d lPos1 =  new Vector3d(0.0, 0.0, 2.0);
        t.set(lPos1);
        TransformGroup l1Trans = new TransformGroup(t);
        l1RotTrans.addChild(l1Trans);

//        t = new Transform3D();
//        Vector3d lPos2 = new Vector3d(0.5, 0.8, 2.0);
//        t.set(lPos2);
//        TransformGroup l2Trans = new TransformGroup(t);
//        l2RotTrans.addChild(l2Trans);

        // Create Geometry for point lights
        ColoringAttributes caL1 = new ColoringAttributes();
//        ColoringAttributes caL2 = new ColoringAttributes();
        caL1.setColor(lColor1);
//        caL2.setColor(lColor2);
        Appearance appL1 = new Appearance();
//        Appearance appL2 = new Appearance();
        appL1.setColoringAttributes(caL1);
//        appL2.setColoringAttributes(caL2);
        l1Trans.addChild(new Sphere(0.05f, appL1));
//        l2Trans.addChild(new Sphere(0.05f, appL2));

        // Create lights
        AmbientLight aLgt = new AmbientLight(alColor);

        Light lgt1 = null;
//        Light lgt2 = null;

        Point3f lPoint  = new Point3f(0.0f, 0.0f, 0.0f);
        Point3f atten = new Point3f(1.0f, 0.0f, 0.0f);
        Vector3f lDirect1 = new Vector3f(lPos1);
//        Vector3f lDirect2 = new Vector3f(lPos2);
        lDirect1.negate();
//        lDirect2.negate();

        switch (lightType) {