appearancemixed.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: AppearanceMixed.java,v $
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 * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
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 * This software is provided "AS IS," without a warranty of any
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 * $Revision: 1.5 $
 * $Date: 2006/03/03 22:02:01 $
 * $State: Exp $
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package org.jdesktop.j3d.examples.appearance;

import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.GraphicsConfiguration;
import org.jdesktop.j3d.examples.Resources;

public class AppearanceMixed extends javax.swing.JFrame {

    private java.net.URL texImage = null;
    private java.net.URL bgImage = null;
    private SimpleUniverse univ = null;
    private BranchGroup scene = null;

    static class MyCanvas3D extends Canvas3D {
	private GraphicsContext3D gc;

	private static final int vertIndices[] = { 0, 1, 2, 0, 2, 3 };
	private static final int normalIndices[] = { 0, 0, 0, 1, 1, 1 };
	private IndexedTriangleArray tri =
	    new IndexedTriangleArray(4, IndexedTriangleArray.COORDINATES |
				     IndexedTriangleArray.NORMALS, 6);

	private Point3f vert[] = {
	    new Point3f(-0.12f, -0.12f, 0.0f),
	    new Point3f( 0.12f, -0.12f, 0.0f),
	    new Point3f( 0.12f,  0.12f, 0.0f),
	    new Point3f(-0.12f,  0.12f, 0.0f),
	};

	private Point3f min[] = {
	    new Point3f(-0.24f, -0.24f, -0.20f),
	    new Point3f( 0.04f, -0.28f, -0.24f),
	    new Point3f( 0.00f,  0.00f, -0.24f),
	    new Point3f(-0.32f,  0.08f, -0.20f),
	};

	private Point3f max[] = {
	    new Point3f(-0.04f, -0.04f, 0.12f),
	    new Point3f( 0.32f, -0.04f, 0.16f),
	    new Point3f( 0.36f,  0.28f, 0.20f),
	    new Point3f(-0.04f,  0.24f, 0.16f),
	};

	private Point3f delta[] = {
	    new Point3f(-0.0021f, -0.0017f,  0.0014f),
	    new Point3f( 0.0025f, -0.0013f, -0.0018f),
	    new Point3f( 0.0021f,  0.0017f,  0.0018f),
	    new Point3f(-0.0025f,  0.0013f, -0.0014f),
	};

	private Vector3f normals[];
	private Vector3f v01 = new Vector3f();
	private Vector3f v02 = new Vector3f();
	private Vector3f v03 = new Vector3f();

	public void renderField(int fieldDesc) {
	    computeVert();
	    computeNormals();
	    gc.draw(tri);
	}

	private void computeVert() {
	    for (int i = 0; i < 4; i++) {
		vert[i].add(delta[i]);
		if (vert[i].x > max[i].x) {
		    vert[i].x = max[i].x;
		    delta[i].x *= -1.0f;
		}
		if (vert[i].x < min[i].x) {
		    vert[i].x = min[i].x;
		    delta[i].x *= -1.0f;
		}
		if (vert[i].y > max[i].y) {
		    vert[i].y = max[i].y;
		    delta[i].y *= -1.0f;
		}
		if (vert[i].y < min[i].y) {
		    vert[i].y = min[i].y;
		    delta[i].y *= -1.0f;
		}
		if (vert[i].z > max[i].z) {
		    vert[i].z = max[i].z;
		    delta[i].z *= -1.0f;
		}
		if (vert[i].z < min[i].z) {
		    vert[i].z = min[i].z;
		    delta[i].z *= -1.0f;
		}
	    }
	    tri.setCoordinates(0, vert);
	}

	private void computeNormals() {
	    v01.sub(vert[1], vert[0]);
	    v02.sub(vert[2], vert[0]);
	    v03.sub(vert[3], vert[0]);
	    normals[0].cross(v01, v02);
	    normals[0].normalize();
	    normals[1].cross(v02, v03);
	    normals[1].normalize();
	    tri.setNormals(0, normals);
	}

	public MyCanvas3D(GraphicsConfiguration gcfg) {
	    super(gcfg);

	    // Allocate memory for normals
	    normals = new Vector3f[2];
	    normals[0] = new Vector3f();
	    normals[1] = new Vector3f();

	    // Set up the indices
	    tri.setCoordinateIndices(0, vertIndices);
	    tri.setNormalIndices(0, normalIndices);

	    // Set up the graphics context
	    gc = getGraphicsContext3D();

	    // Create the appearance for the triangle fan
	    Appearance app = new Appearance();
	    Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
	    Color3f white = new Color3f(1.0f, 1.0f, 1.0f);
	    Color3f objColor = new Color3f(0.0f, 0.0f, 0.8f);
	    app.setMaterial(new Material(objColor, black, objColor,
					 white, 80.0f));
	    gc.setAppearance(app);

	    // Set up the global lights
	    Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
	    Vector3f lDir1  = new Vector3f(-1.0f, -1.0f, -1.0f);
	    Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);
	    gc.addLight(new AmbientLight(alColor));
	    gc.addLight(new DirectionalLight(lColor1, lDir1));
	}
    }


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

	// 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
	TextureLoader bgTexture = new TextureLoader(bgImage, this);
	Background bg = new Background(bgTexture.getImage());
	bg.setApplicationBounds(bounds);
	objRoot.addChild(bg);

	// Set up the global lights
	Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
	Vector3f lDir1  = new Vector3f(-1.0f, -1.0f, -1.0f);
	Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);

	AmbientLight aLgt = new AmbientLight(alColor);
	aLgt.setInfluencingBounds(bounds);
	DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
	lgt1.setInfluencingBounds(bounds);
	objRoot.addChild(aLgt);
	objRoot.addChild(lgt1);

	// Create a bunch of objects with a behavior and add them
	// into the scene graph.

	int row, col;
	Appearance[][] app = new Appearance[3][3];

	for (row = 0; row < 3; row++)
	    for (col = 0; col < 3; col++)
		app[row][col] = createAppearance(row * 3 + col);

	for (int i = 0; i < 3; i++) {
	    double ypos = (double)(i - 1) * 0.6;
	    for (int j = 0; j < 3; j++) {
		double xpos = (double)(j - 1) * 0.6;
		objRoot.addChild(createObject(app[i][j], 0.12,  xpos, ypos));
	    }
	}

        // Let Java 3D perform optimizations on this scene graph.
        objRoot.compile();

	return objRoot;
    }


    private Appearance createAppearance(int idx) {
	Appearance app = new Appearance();

	// Globally used colors
	Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
	Color3f white = new Color3f(1.0f, 1.0f, 1.0f);

	switch (idx) {
	// Unlit solid
	case 0:
	    {
		// Set up the coloring properties
		Color3f objColor = new Color3f(1.0f, 0.2f, 0.4f);
		ColoringAttributes ca = new ColoringAttributes();
		ca.setColor(objColor);
		app.setColoringAttributes(ca);
		break;
	    }


	// Unlit wire frame
	case 1:
	    {
		// Set up the coloring properties
		Color3f objColor = new Color3f(0.5f, 0.0f, 0.2f);
		ColoringAttributes ca = new ColoringAttributes();
		ca.setColor(objColor);
		app.setColoringAttributes(ca);