Very newbie question!

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hinoy - 15 Sep 2003 23:57 GMT

Why doesn't it work?

I can' t see the triangles !

###############################################################################

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.Event;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Cone;
import javax.media.j3d.*;
import javax.vecmath.*;

public class HelloJava3Da extends Applet{

public HelloJava3Da(){

setLayout(new BorderLayout());
Canvas3D canvas3D=new Canvas3D(null);
add("Center",canvas3D);

BranchGroup scene=createSceneGraph();
scene.compile();

SimpleUniverse simpleU=new SimpleUniverse(canvas3D);

simpleU.getViewingPlatform().setNominalViewingTransform();

simpleU.addBranchGraph(scene);
}

public static void main(String[] args){

Frame frame=new MainFrame(new HelloJava3Da(), 256, 256);
}

public BranchGroup createSceneGraph(){

BranchGroup objroot=new BranchGroup();

TriangleArray punta=new TriangleArray(6,TriangleArray.COORDINATES);

Point3f uno=new Point3f(-0.4f,0.0f,0.4f);
Point3f due=new Point3f(0.4f,0.0f,0.4f);
Point3f tre=new Point3f(0.4f,0.0f,-0.4f);
Point3f quattro=new Point3f(-0.4f,0.0f,-0.4f);
Point3f cinque=new Point3f(-0.4f,0.0f,0.4f);
Point3f sei=new Point3f(0.0f,0.4f,0.0f);

punta.setCoordinate(0,uno);
punta.setCoordinate(1,due);
punta.setCoordinate(2,tre);
punta.setCoordinate(3,quattro);
punta.setCoordinate(4,cinque);
punta.setCoordinate(5,sei);

Shape3D p=new Shape3D();

p.setGeometry(punta);

Appearance aa=new Appearance();

p.setAppearance(aa);

objroot.addChild(p);

return objroot;
}
}

#################################################################################################

THANKS!
--

Reply to this Message

P. Flavin - 16 Sep 2003 15:39 GMT

"Hello World" programs and files are intro programs for newbies
---------------------- and Web3d.org & Java3d have their versions.

Sun Loaders Work where 'new' ( Yumetech ) Loaders Fail
------------------------------------------------------

| Problem files with the "new" X3D Loaders often are
| NO PROBLEM with the old, reliable Sun VRML Loaders.
[quoted text clipped - 30 lines]
| |
| | Why ... is it still not working properly ?

http://archives.java.sun.com/cgi-bin/wa?A2=ind0301&L=java3d-interest&P=R18442

| Use what works best, the Sun's VRML Loaders have
| been working reliabably ( not perfectly ) since
[quoted text clipped - 4 lines]
| Web3d.org's __ " Hello World " __ VRML file Works Great
| ----------------------------------------------------------

http://www.frontiernet.net/~imaging/vrml_loaders_working.html
http://www.frontiernet.net/~imaging/sc_web3d_org_hello_world.jpg

http://archives.java.sun.com/cgi-bin/wa?A2=ind0301&L=java3d-interest&P)553

http://www.web3d.org/TaskGroups/x3d/translation/examples/HelloWorld.html
http://www.web3d.org/TaskGroups/x3d/translation/examples/HelloWorld.wrl

| The AppearanceExplorer shows the attributes
| which are included in an Appearance object.
[quoted text clipped - 7 lines]
| The source to these programs is included in the zip
| file available here.

http://web3dbooks.com/java3d/jumpstart/Java3DExplorer.html
http://web3dbooks.com/java3d/jumpstart/AppearanceExplorer.html
http://web3dbooks.com/java3d/jumpstart/J3DJumpStart.zip

|
| Why doesn't it work?
|
| I can' t see the triangles !
|
http://groups.google.com/groups?group=comp.lang.java.3d&selm=Otr9b.319606%24Ny5.
10073629%40twister2.libero.it

If it's too dark to see, turn on some lights.

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.Event;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Cone;
import javax.media.j3d.*;
import javax.vecmath.*;

public class HelloJava3Da extends Applet{

public HelloJava3Da(){

setLayout(new BorderLayout());
Canvas3D canvas3D=new Canvas3D(null);
add("Center",canvas3D);

BranchGroup scene=createSceneGraph();
scene.compile();

SimpleUniverse     simpleU = new SimpleUniverse(canvas3D);

     simpleU.getViewingPlatform(
            ).setNominalViewingTransform();

             simpleU.addBranchGraph(scene);
}

public static void main(String[] args){

Frame frame=new MainFrame(new HelloJava3Da(), 256, 256);
}

public BranchGroup createSceneGraph(){

BranchGroup objroot=new BranchGroup();

                                                    // add light
    Color3f whiteLight = new Color3f( 1f, 1f, 1f );
AmbientLight ambientLight = new AmbientLight( whiteLight );

objroot.addChild( ambientLight );

TriangleArray punta = new
TriangleArray(6,TriangleArray.COORDINATES);

Point3f uno        =new Point3f( -0.4f,0.0f,0.4f );
Point3f due        =new Point3f( 0.4f,0.0f,0.4f );
Point3f tre        =new Point3f( 0.4f,0.0f,-0.4f );
Point3f quattro    =new Point3f( -0.4f,0.0f,-0.4f );
Point3f cinque    =new Point3f( -0.4f,0.0f,0.4f );
Point3f sei        =new Point3f( 0.0f,0.4f,0.0f );

     punta.setCoordinate(0,uno);
punta.setCoordinate(1,due);
punta.setCoordinate(2,tre);
punta.setCoordinate(3,quattro);
punta.setCoordinate(4,cinque);
punta.setCoordinate(5,sei);

Shape3D p=new Shape3D();

p.setGeometry(punta);

Appearance aa=new Appearance();

                                            // add polygon attributes
Color3f greenColor = new Color3f( 0f, 1f, 0f );

ColoringAttributes ca = new ColoringAttributes( );
ca.setColor( greenColor );

        PolygonAttributes pa = new PolygonAttributes( );
pa.setPolygonMode( pa.POLYGON_LINE );
pa.setCullFace( pa.CULL_NONE );

        aa.setColoringAttributes( ca );
aa.setPolygonAttributes( pa );

p.setAppearance(aa);

objroot.addChild(p);

return objroot;
}

}            //___ end ____

Demos with VRML & Human Animation
---------------------------------
http://www.frontiernet.net/~imaging/sourcecode/Human.java
http://www.frontiernet.net/~imaging/sourcecode/HumanWithControlledArm_VRML.java

http://www.frontiernet.net/~imaging/sourcecode/VrmlPickingTest.java

-- Paul, Java Developer & Web Animator
--------------------------------------
Imaging the Imagined: Modeling with Math & a Keyboard

Reply to this Message

P. Flavin - 16 Sep 2003 16:13 GMT

hinoy wrote in thread: Very newbie question!

> Why doesn't it work?
>
> I can' t see the triangles !

http://news.ege.edu.tr/article.php?id=1538&group=comp.lang.java.3d

full reply ( with full program ) in thread:

Hello World ! : Getting Started: Web3d.org's HelloWorld ... Java3d
------------------------------------------------------------------

| If it's too dark to see, turn on some lights.

    Color3f     greenColor = new Color3f( 0f, 1f, 0f );

    ColoringAttributes     ca = new ColoringAttributes( );

                ca.setColor(     greenColor );

    PolygonAttributes pa = new PolygonAttributes( );

pa.setPolygonMode( pa.POLYGON_LINE );
pa.setCullFace( pa.CULL_NONE );

        aa.setColoringAttributes( ca );
aa.setPolygonAttributes( pa );

         p.setAppearance( aa );

objroot.addChild( p );

http://news.ege.edu.tr/article.php?id=1539&group=comp.lang.java.3d

VRML & Java are portable and support 3d animation on the web.

Web3d.org's __ " Hello World " __ VRML file Works Great
----------------------------------------------------------
http://www.frontiernet.net/~imaging/vrml_loaders_working.html

-- Paul, Java Developer & Web Animator
--------------------------------------
Imaging the Imagined: Modeling with Math & a Keyboard

Reply to this Message

Very newbie question!

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