This example (as well as Java3D) will blend between two textures.
However, you can not set the amount of blend, it's always 50/50.
I think Michael is looking to control the blend function a little bit
more (so am I!).
Am I misinterpreting this?
And can you control the amount of blend/alpha (ex texture1.alpha = .2)
directly - other than the actual alpha of each pixels?
Charmaine Lee wrote:
> Mike,
>
> You can use multiple texture unit states to blend multiple
> textures onto a shape. Included in the attachment is an
> example of multi texturing in Java3D.
>
> -Charmaine Lee
> Java3D Engineering Team
>
>
>
>
>
>> X-Originating-IP: [128.187.171.43]
>> Mime-Version: 1.0
>> X-OriginalArrivalTime: 14 Feb 2001 22:50:46.0351 (UTC)
>
> FILETIME=[916FF5F0:01C096D8]
>
>> Date: Wed, 14 Feb 2001 15:03:13 -0800
>> From: Michael Smith <[EMAIL PROTECTED]>
>> Subject: [JAVA3D] texture map blending
>> To: [EMAIL PROTECTED]
>>
>> Java3D people,
>> I'm doing research in image morphing and animation. I'd like
to know
>> how you would recommend handling the problem of blending two different
>> textures onto a shape (triangulated grid) in Java3d. We'd like to do it
>> taking advantage of java3d's hardware acceleration if we can.
>> I've looked through the documentation on Java3D and couldn't find
>> anything that I thought would work for this. The BLEND option in the
>> TextureAppearance class only works with regaurd to the blend color.
>> One thing we've done in the past was to paint the first texture
map at
>> a fraction of it's value (ex texture1.alpha = .2 ) and then paint
the second
>> texture map on top of that with a the rest of the value(
texture2.alpha = .8
>> ). I don't know how you would do this in java3d.
>> I would be most grateful for any advice you would have.
>>
>> -Mike Smith.
>> _________________________________________________________________
>> Get your FREE download of MSN Explorer at http://explorer.msn.com
>>
>>
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>>
>>
>> ------------------------------------------------------------------------
>>
>> /*
>> * @(#)MultiTextureTest.java 1.8 01/01/11 07:40:34
>> *
>> * Copyright (c) 1996-2001 Sun Microsystems, Inc. All Rights Reserved.
>> *
>> * Sun grants you ("Licensee") a non-exclusive, royalty free,
license to use,
>> * modify and redistribute this software in source and binary code form,
>> * provided that i) this copyright notice and license appear on all
copies of
>> * the software; and ii) Licensee does not utilize the software in a
manner
>> * which is disparaging to Sun.
>> *
>> * 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 AND ITS LICENSORS
SHALL NOT BE
>> * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING,
MODIFYING
>> * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
SUN OR ITS
>> * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
DIRECT,
>> * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
HOWEVER
>> * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
THE USE OF
>> * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
>> * POSSIBILITY OF SUCH DAMAGES.
>> *
>> * This software is not designed or intended for use in on-line
control of
>> * aircraft, air traffic, aircraft navigation or aircraft
communications; or in
>> * the design, construction, operation or maintenance of any nuclear
>> * facility. Licensee represents and warrants that it will not use or
>> * redistribute the Software for such purposes.
>> */
>>
>> import com.sun.j3d.utils.image.TextureLoader;
>> import com.sun.j3d.utils.geometry.Box;
>> import com.sun.j3d.utils.behaviors.vp.*;
>> import java.applet.Applet;
>> import java.awt.*;
>> import java.awt.event.*;
>> import com.sun.j3d.utils.applet.MainFrame;
>> import com.sun.j3d.utils.universe.*;
>> import javax.media.j3d.*;
>> import javax.vecmath.*;
>> import java.awt.image.BufferedImage;
>>
>> public class MultiTextureTest extends Applet implements ItemListener{
>>
>> Choice choice;
>> TextureUnitState textureUnitState[] = new TextureUnitState[2];
>> Texture stoneTex;
>> Texture skyTex;
>> Texture lightTex;
>>
>> private java.net.URL stoneImage = null;
>> private java.net.URL skyImage = null;
>>
>> private SimpleUniverse u = null;
>>
>> public Texture createLightMap(){
>>
>> int width = 128;
>> int height = 128;
>> BufferedImage bimage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
>> int [] rgbArray = new int[width * height];
>> int index, index2;
>> int rgbInc = 256 / (width / 2 - 20);
>> int rgbValue = 0;
>> int k = width/2 - 5;
>> int i, j, rgb;
>>
>> rgb = 0xff;
>> rgbValue = rgb | (rgb << 8) | (rgb << 16) | (rgb << 24);
>> for ( i = width / 2 - 1, j = 0; j < 10; j++, i--) {
>> rgbArray[i] = rgbValue;
>> }
>>
>> for (; i > 8; i--, rgb -= rgbInc) {
>> rgbValue = rgb | (rgb << 8) | (rgb << 16) | (rgb << 24);
>> rgbArray[i] = rgbValue;
>> }
>>
>> for (; i >= 0; i--) {
>> rgbArray[i] = rgbValue;
>> }
>>
>> for (i = 0; i < width/2; i++) {
>> rgbValue = rgbArray[i];
>> index = i;
>> index2 = (width - i - 1);
>> for (j = 0; j < height; j++) {
>> rgbArray[index] = rgbArray[index2] = rgbValue;
>> index += width;
>> index2 += width;
>> }
>> }
>>
>> bimage.setRGB(0, 0, width, height, rgbArray, 0, width);
>>
>>
>> ImageComponent2D grayImage = new
ImageComponent2D(ImageComponent.FORMAT_RGB, bimage);
>>
>> lightTex = new Texture2D(Texture.BASE_LEVEL, Texture.RGB, width,
height);
>> lightTex.setImage(0, grayImage);
>>
>> return lightTex;
>> }
>>
>>
>> public BranchGroup createSceneGraph() {
>> // 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(0.4);
>> objScale.setTransform(t3d);
>> objRoot.addChild(objScale);
>>
>> TransformGroup objTrans = new TransformGroup();
>> //write-enable for behaviors
>> objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
>> objTrans.setCapability( TransformGroup.ALLOW_TRANSFORM_READ );
>> objTrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
>> objScale.addChild(objTrans);
>>
>> Appearance ap = new Appearance();
>>
>> // load textures
>> TextureAttributes texAttr1 = new TextureAttributes();
>> texAttr1.setTextureMode(TextureAttributes.DECAL);
>> TextureAttributes texAttr2 = new TextureAttributes();
>> texAttr2.setTextureMode(TextureAttributes.MODULATE);
>>
>> TextureLoader tex = new TextureLoader(stoneImage, new
String("RGB"), this);
>> if (tex == null)
>> return null;
>> stoneTex = tex.getTexture();
>>
>> tex = new TextureLoader(skyImage, new String("RGB"), this);
>> if (tex == null)
>> return null;
>> skyTex = tex.getTexture();
>>
>> lightTex = createLightMap();
>>
>>
>> textureUnitState[0] = new TextureUnitState(stoneTex, texAttr1,
null);
>>
textureUnitState[0].setCapability(TextureUnitState.ALLOW_STATE_WRITE);
>>
>> textureUnitState[1] = new TextureUnitState(lightTex, texAttr2,
null);
>>
textureUnitState[1].setCapability(TextureUnitState.ALLOW_STATE_WRITE);
>>
>> ap.setTextureUnitState(textureUnitState);
>>
>> //Create a Box
>> Box BoxObj = new Box(1.5f, 1.5f, 0.8f, Box.GENERATE_NORMALS |
>> Box.GENERATE_TEXTURE_COORDS, ap, 2);
>> // add it to the scene graph.
>> objTrans.addChild(BoxObj);
>>
>> BoundingSphere bounds =
>> new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
>>
>> //Shine it with two lights.
>> Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
>> Color3f lColor2 = new Color3f(0.2f, 0.2f, 0.1f);
>> Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f);
>> Vector3f lDir2 = new Vector3f(0.0f, 0.0f, -1.0f);
>> DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
>> DirectionalLight lgt2 = new DirectionalLight(lColor2, lDir2);
>> lgt1.setInfluencingBounds(bounds);
>> lgt2.setInfluencingBounds(bounds);
>> objScale.addChild(lgt1);
>> objScale.addChild(lgt2);
>>
>> // Let Java 3D perform optimizations on this scene graph.
>> objRoot.compile();
>>
>> return objRoot;
>> }
>>
>> public MultiTextureTest (){
>> }
>>
>> public MultiTextureTest(java.net.URL stoneURL, java.net.URL skyURL) {
>> stoneImage = stoneURL;
>> skyImage = skyURL;
>> }
>>
>> public void init() {
>> if (stoneImage == null) {
>> // the path to the image for an applet
>> try {
>> stoneImage = new java.net.URL(getCodeBase().toString() +
>> "../images/stone.jpg");
>> }
>> catch (java.net.MalformedURLException ex) {
>> System.out.println(ex.getMessage());
>> System.exit(1);
>> }
>> }
>>
>> if (skyImage == null) {
>> // the path to the image for an applet
>> try {
>> skyImage = new java.net.URL(getCodeBase().toString() +
>> "../images/bg.jpg");
>> }
>> catch (java.net.MalformedURLException ex) {
>> System.out.println(ex.getMessage());
>> System.exit(1);
>> }
>> }
>>
>> setLayout(new BorderLayout());
>> GraphicsConfiguration config =
>> SimpleUniverse.getPreferredConfiguration();
>>
>> Canvas3D c = new Canvas3D(config);
>> add("Center", c);
>>
>> // create the gui
>> choice = new Choice();
>> choice.addItem("stone + light");
>> choice.addItem("stone");
>> choice.addItem("lightMap");
>> choice.addItem("sky");
>> choice.addItem("stone + sky");
>> choice.addItemListener(this);
>> add("North", choice);
>>
>> BranchGroup scene = createSceneGraph();
>> u = new SimpleUniverse(c);
>>
>> ViewingPlatform viewingPlatform = u.getViewingPlatform();
>> // This will move the ViewPlatform back a bit so the
>> // objects in the scene can be viewed.
>> viewingPlatform.setNominalViewingTransform();
>>
>> // add orbit behavior but disable translate
>> OrbitBehavior orbit =
>> new OrbitBehavior(c, OrbitBehavior.DISABLE_TRANSLATE);
>> BoundingSphere bounds =
>> new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
>> orbit.setSchedulingBounds(bounds);
>> viewingPlatform.setViewPlatformBehavior(orbit);
>>
>> u.addBranchGraph(scene);
>> }
>>
>> public void destroy() {
>> u.removeAllLocales();
>> }
>>
>> public void itemStateChanged(ItemEvent e)
>> {
>> int index = choice.getSelectedIndex();
>>
>> switch (index) {
>> case 0 : /* stone + light */
>> textureUnitState[0].setTexture(stoneTex);
>> textureUnitState[1].setTexture(lightTex);
>> break;
>> case 1 : /* stone */
>> textureUnitState[0].setTexture(stoneTex);
>> textureUnitState[1].setTexture(null);
>> break;
>> case 2 : /* light */
>> textureUnitState[0].setTexture(null);
>> textureUnitState[1].setTexture(lightTex);
>> break;
>> case 3 : /* sky */
>> textureUnitState[0].setTexture(null);
>> textureUnitState[1].setTexture(skyTex);
>> break;
>> case 4 : /* stone + sky */
>> textureUnitState[0].setTexture(stoneTex);
>> textureUnitState[1].setTexture(skyTex);
>> break;
>> default: /* both */
>> break;
>> }
>> }
>>
>> public static void main(String argv[])
>> {
>> java.net.URL stoneURL = null;
>> java.net.URL skyURL = null;
>> // the path to the image for an application
>> try {
>> stoneURL = new java.net.URL("file:../images/stone.jpg");
>> skyURL = new java.net.URL("file:../images/bg.jpg");
>> }
>> catch (java.net.MalformedURLException ex) {
>> System.out.println(ex.getMessage());
>> System.exit(1);
>> }
>> new MainFrame(new MultiTextureTest(stoneURL, skyURL), 750, 750);
>> }
>> }
>>
>> MultiTextureTest.java
>>
>> Content-Description:
>>
>> MultiTextureTest.java
>> Content-Type:
>>
>> TEXT/plain
>>
>>
--
___________________________________________________________
Shawn Kendall Full Sail Real World Education
Course Director 3300 University BLVD
Real Time 3D for Gaming Winter Park FL 32792
[EMAIL PROTECTED] http://www.fullsail.com
___________________________________________________________
--
___________________________________________________________
Shawn Kendall Full Sail Real World Education
Course Director 3300 University BLVD
Real Time 3D for Gaming Winter Park FL 32792
[EMAIL PROTECTED] http://www.fullsail.com
___________________________________________________________
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA3D-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
