Hi Marc,
I did what you suggested with changing the values of Java3D objects(see
ActionPerformed method), but I get this new error, which tells me I have
not set my capability bits correctly, Could you please look at the
attached file and give me any suggestions.
THe error is :
inside actionPerformed
inside 1.
inside capability null/njavax.media.j3d.CapabilityNotSetException:
Appearance: n
o capability to set material
at javax.media.j3d.Appearance.setMaterial(Appearance.java:210)
at ExSwitch.actionPerformed(ExSwitch.java:459)
at java.awt.MenuItem.processActionEvent(MenuItem.java:500)
at java.awt.MenuItem.processEvent(MenuItem.java:464)
at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:269)
at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:259)
at java.awt.EventQueue.dispatchEvent(Compiled Code)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:68)
after setting app[1]
THANKS
Vineet Gupta
At 10:52 AM 2/4/1999 +0100, Marc Alexa wrote:
>Hi!
>
>Sometimes it seems to me that it is better to change values of
>Java3D objects rather than exchanging the objects. What worked
>for me is to change the Material but let the Apparance object be
>the same. Be sure to set the right capcbilities of your Appearance
>object.
>
>Marc
>
>> X-Sender: [EMAIL PROTECTED]
>> Date: Wed, 03 Feb 1999 16:26:04 -0500
>> To: [EMAIL PROTECTED]
>> From: Vineet Gupta <[EMAIL PROTECTED]>
>> Subject: Re: [java3d] Changing appearance interactively
>> Mime-Version: 1.0
>>
>> To Chad, Tachio,
>>
>>
>> THANKS for the response, but setting the capability to read/write still
>> gives the same error. Any other suggestions.
>>
>>
>> Vineet Gupta
>>
>>
>> At 02:57 PM 2/3/1999 -0500, Tachio Terauchi wrote:
>> >Maybe you didn't set capability.
>> >
>> >-Tachio
>> >
>> >On Tue, 2 Feb 1999, Vineet Gupta wrote:
>> >
>> >> Hi,
>> >>
>> >> I have been trying to change the appearance interactively of the small
>> >> world . I start out with the unlit wireframe, change to the
following to
>> >> show how the scene changes:
>> >>
>> >> unlit wireframe (1)
>> >> unlit solid (2)
>> >> unlit points (3)
>> >> lit solid (4)
>> >> transparent(5)
>> >> Texture (6)
>> >> ...
>> >>
>> >> I can change the scene if I precompute the six appearance above for
>using
>> >> six world scenes, but this is inefficient. I have tried to make changes
>> >> interactive for one world scene, but I get this error:
>> >>
>> >>
>> >> Exception occurred during event dispatching.
>> >> at change.actionPerformed(change.java:397)
>> >> ...
>> >>
>> >> I have menu options which can be clicked with above scene changes. On
>> >> actionperformed method,
>> >> I have shape.setAppearance(null) and then assign the new appearance by
>> >> shape.setAppearance( changeappearance ).
>> >> I know it has got to be something simple I am not doing.
>> >>
>> >> Please help!
>> >>
>> >>
>> >> THANKS
>> >> Vineet Gupta
>> >>
>> >> =====================================================================
>> >> To subscribe/unsubscribe, send mail to [EMAIL PROTECTED]
>> >> Java 3D Home Page: http://java.sun.com/products/java-media/3D/
>> >>
>> >
>> >=====================================================================
>> >To subscribe/unsubscribe, send mail to [EMAIL PROTECTED]
>> >Java 3D Home Page: http://java.sun.com/products/java-media/3D/
>> >
>> >
>> =====================================================================
>> To subscribe/unsubscribe, send mail to [EMAIL PROTECTED]
>> Java 3D Home Page: http://java.sun.com/products/java-media/3D/
>
>---------------------------------------------------------------------
> Marc Alexa Darmstadt U. of Technology
> [EMAIL PROTECTED] Dept. of CS, GRIS
> http://www.igd.fhg.de/~alexa 3D Graphics Computing
> Phone: ++49.6151.155.674 Rundeturmstr. 6
> Fax: ++49.6151.155.669 D-64283 Darmstadt, Germany
>---------------------------------------------------------------------
>
>
>
import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.image.*;
import com.sun.j3d.utils.geometry.*;
import java.applet.*;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
public class Appear extends Example
{
//--------------------------------------------------------------
// SCENE CONTENT
//--------------------------------------------------------------
//
// Nodes (updated via menu)
//
private Switch switch2 = null;
private int currentSwitch = 0;
Shape3D shape;
// for setting appearance
Transform3D t3d;
TransformGroup tg0;
Appearance[] app;
Group scene;
landgrid lgd;
double[] height1;
ColoringAttributes ca;
Material material;
//
// Build scene
//
public Group buildScene( )
{
// Turn on the example headlight
setHeadlightEnable( true );
// Default to walk navigation
setNavigationType( Walk );
// Build the scene group
// scene = new Group( );
// create the root of the branch graph
scene = new Group();
if ( debug ) System.err.println( " switch shapes..." );
// Add a light
BoundingSphere worldBounds = new BoundingSphere(
new Point3d( 0.0, 0.0, 0.0 ), // Center
1000.0 ); // Extent
DirectionalLight light = new DirectionalLight( );
light.setEnable( true );
light.setColor( new Color3f( 1.0f, 1.0f, 1.0f ) );
light.setDirection( new Vector3f( 0.5f, -1.0f, -0.5f ) );
light.setInfluencingBounds( worldBounds );
scene.addChild( light );
// Get the elevation data from the elevation file
System.out.println("Swoe for elevation");
lgd = new landgrid();
lgd.Read_Swoe();
int numberofelements;
numberofelements= lgd.ground.pix.length;
System.out.println("number of elevation data read is "+
numberofelements);
height1 = lgd.returnheight();
app = new Appearance[13];
// set the initial setup to 0
for (int I=0; I < 13; I++)
{
app[I] = createAppearance(I);
}
Transform3D t3d = new Transform3D();
t3d.setTranslation ( new Vector3f( -2.0f, 1.5f, 0.0f ) );
TransformGroup tg0 = new TransformGroup ( t3d );
ElevationGrid shape = new ElevationGrid(lgd.latin,lgd.lonin, height1);
shape.setAppearance( app[0] );
scene.addChild ( shape );
System.out.println("exiting Build scene from ExSwitch");
return scene;
}
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 wire frame
case 0:
{
// Set up the coloring properties
Color3f objColor = new Color3f(0.5f, 0.0f, 0.2f);
ca = new ColoringAttributes(); // ColoringAttributes
// ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_READ);
// ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
ca.setColor(objColor);
app.setColoringAttributes(ca);
// Set up the polygon attributes
PolygonAttributes pa = new PolygonAttributes();
pa.setCapability(Appearance.ALLOW_POLYGON_ATTRIBUTES_READ);
pa.setCapability(Appearance.ALLOW_POLYGON_ATTRIBUTES_WRITE);
pa.setPolygonMode(pa.POLYGON_LINE);
pa.setCullFace(pa.CULL_BACK);
// pa.setPolygonOffset(0.0);
app.setPolygonAttributes(pa);
break;
}
// Texture mapped, lit solid
case 1:
{
// Set up the texture map
TextureLoader tex = new TextureLoader("apimage.jpg", this);
// tex.setCapability(Appearance.ALLOW_TEXTURE_ATTRIBUTES_READ);
// tex.setCapability(Appearance.ALLOW_TEXTURE_ATTRIBUTES_WRITE);
app.setTexture(tex.getTexture());
// Set up the material properties
Material material = new Material(white, black,white, black, 1.0f);
material.setCapability(Appearance.ALLOW_MATERIAL_READ);
material.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
// app.setMaterial(material);
break;
}
// Unlit solid
case 2:
{
// Set up the coloring properties
Color3f objColor = new Color3f(.3f, 0.3f, 0.3f); //.4,.2,.4
ColoringAttributes ca = new ColoringAttributes();
ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_READ);
ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
ca.setColor(objColor);
ca.setShadeModel( ColoringAttributes.SHADE_GOURAUD );
app.setColoringAttributes(ca);
break;
}
// Unlit points
case 3:
{
// Set up the coloring properties
Color3f objColor = new Color3f(0.2f, 0.2f, 1.0f);
ColoringAttributes ca = new ColoringAttributes();
ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_READ);
ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
ca.setColor(objColor);
app.setColoringAttributes(ca);
// Set up the polygon attributes
PolygonAttributes pa = new PolygonAttributes();
pa.setCapability(Appearance.ALLOW_POLYGON_ATTRIBUTES_READ);
pa.setCapability(Appearance.ALLOW_POLYGON_ATTRIBUTES_WRITE);
pa.setPolygonMode(pa.POLYGON_POINT);
pa.setCullFace(pa.CULL_NONE);
app.setPolygonAttributes(pa);
// Set up point attributes
PointAttributes pta = new PointAttributes();
pta.setCapability(Appearance.ALLOW_POINT_ATTRIBUTES_READ);
pta.setCapability(Appearance.ALLOW_POINT_ATTRIBUTES_WRITE);
pta.setPointSize(5.0f);
pta.setPointAntialiasingEnable( false );
app.setPointAttributes(pta);
break;
}
// Lit solid
case 4:
{
// Set up the material properties
Color3f objColor = new Color3f(0.8f, 0.0f, 0.0f);
Material material = new Material(objColor, black, objColor,
white, 80.0f);
material.setCapability(Appearance.ALLOW_MATERIAL_READ);
material.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
app.setMaterial(material);
break;
}
// Transparent, lit solid
case 5:
{
// Set up the transparency properties
TransparencyAttributes ta = new TransparencyAttributes();
ta.setCapability(Appearance.ALLOW_TRANSPARENCY_ATTRIBUTES_READ);
ta.setCapability(Appearance.ALLOW_TRANSPARENCY_ATTRIBUTES_WRITE);
ta.setTransparencyMode(ta.BLENDED);
ta.setTransparency(0.6f);
app.setTransparencyAttributes(ta);
// Set up the polygon attributes
PolygonAttributes pa = new PolygonAttributes();
pa.setCapability(Appearance.ALLOW_POLYGON_ATTRIBUTES_READ);
pa.setCapability(Appearance.ALLOW_POLYGON_ATTRIBUTES_WRITE);
pa.setCullFace(pa.CULL_NONE);
app.setPolygonAttributes(pa);
// Set up the material properties
Color3f objColor = new Color3f(0.7f, 0.8f, 1.0f);
Material material = new Material(objColor, black, objColor,
white, 80.0f);
material.setCapability(Appearance.ALLOW_MATERIAL_READ);
material.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
app.setMaterial(material);
break;
}
// Lit solid, no specular
case 6:
{
// Set up the material properties
Color3f objColor = new Color3f(0.8f, 0.0f, 0.0f);
Material material = new Material(objColor, black, objColor,
white, 80.0f);
material.setCapability(Appearance.ALLOW_MATERIAL_READ);
material.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
app.setMaterial(material);
break;
}
// Lit solid, specular only
case 7:
{
// Set up the material properties
Color3f objColor = new Color3f(0.8f, 0.0f, 0.0f);
Material material = new Material(objColor, black, objColor,
white, 80.0f);
material.setCapability(Appearance.ALLOW_MATERIAL_READ);
material.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
app.setMaterial(material);
break;
}
// Another lit solid with a different color
case 8:
{
// Set up the material properties
Color3f objColor = new Color3f(0.8f, 0.8f, 0.0f);
Material material = new Material(objColor, black, objColor,
white, 80.0f);
material.setCapability(Appearance.ALLOW_MATERIAL_READ);
material.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
app.setMaterial(material);
break;
}
// Material
case 9:
{
Material mat = new Material( );
mat.setCapability(Appearance.ALLOW_MATERIAL_READ);
mat.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
mat.setAmbientColor( 0.3f, 0.3f, 0.3f );
mat.setDiffuseColor( 1.0f, 0.0f, 0.0f );
mat.setEmissiveColor( 0.0f, 0.0f, 0.0f );
mat.setSpecularColor( 1.0f, 1.0f, 1.0f );
mat.setShininess( 80.0f );
app.setMaterial( mat );
break;
}
// Transparency
case 10:
{
TransparencyAttributes ta = new TransparencyAttributes( );
ta.setCapability(Appearance.ALLOW_TRANSPARENCY_ATTRIBUTES_READ);
ta.setCapability(Appearance.ALLOW_TRANSPARENCY_ATTRIBUTES_WRITE);
ta.setTransparency( 0.5f );
ta.setTransparencyMode( TransparencyAttributes.BLENDED );
app.setTransparencyAttributes( ta );
break;
}
// Line
case 11:
{
LineAttributes lta = new LineAttributes( );
lta.setCapability(Appearance.ALLOW_LINE_ATTRIBUTES_READ);
lta.setCapability(Appearance.ALLOW_LINE_ATTRIBUTES_WRITE);
lta.setLineWidth( 10.0f );
lta.setLineAntialiasingEnable( false );
lta.setLinePattern( LineAttributes.PATTERN_SOLID );
app.setLineAttributes( lta );
break;
}
// Rendering
case 12:
{
RenderingAttributes ra = new RenderingAttributes( );
ra.setCapability(Appearance.ALLOW_RENDERING_ATTRIBUTES_READ);
ra.setCapability(Appearance.ALLOW_RENDERING_ATTRIBUTES_WRITE);
ra.setDepthBufferEnable( true );
ra.setAlphaTestFunction( RenderingAttributes.ALWAYS );
app.setRenderingAttributes( ra );
break;
}
default:
{
ColoringAttributes ca = new ColoringAttributes();
ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_READ);
ca.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
ca.setColor(new Color3f(0.0f, 1.0f, 0.0f));
app.setColoringAttributes(ca);
}
}
return app;
}
//--------------------------------------------------------------
// USER INTERFACE
//--------------------------------------------------------------
//
// Main
//
public static void main( String[] args )
{
ExSwitch ex = new ExSwitch( );
// new MainFrame(ex, 256, 256);
ex.initialize( args );
ex.buildUniverse( );
ex.showFrame( );
}
// for applet
public void init ( )
{
String [] args = new String[2];
this.initialize( args );
this.buildUniverse ( );
this.showFrame( );
}
//
// Initialize the GUI (application and applet)
//
public void initialize( String[] args )
{
// Initialize the window, menubar, etc.
super.initialize( args );
exampleFrame.setTitle( "Java 3D Switch Example" );
// Add a menu to select among switch options
Menu mt = new Menu( "Appearance" );
MenuItem mi = new MenuItem("0. Unlit Wireframe");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("1. Texture mappped, lit solid");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("2. Unlit Solid");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("3. Unlit points");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("4. Lit Solid");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("5. Transparent, lit solid");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("6. Lit solid, no specular");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("7. Lit solid, specular only");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("8. Material");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("9. Transparency");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("10. Line");
mi.addActionListener(this);
mt.add(mi);
mi = new MenuItem("11. Rendering");
mi.addActionListener(this);
mt.add(mi);
exampleMenuBar.add(mt);
}
public void actionPerformed(ActionEvent evt)
{
System.out.println("inside actionPerformed");
String arg = evt.getActionCommand();
if (arg.equals("1. Texture mappped, lit solid"))
{
System.out.println("inside 1.");
try {
// System.out.println("app[0] = "+app[0]);
// System.out.println("app[1] = "+app[1]);
// shape.setAppearance( app[1] ); gives
/* Exception occurred during event dispatching
java.lang.NullPointerException
at ExSwitch.actionPerformed (...)
*/
app[1].setMaterial(material);
/* Gives the following error:
inside actionPerformed
inside 1.
inside capability null/njavax.media.j3d.CapabilityNotSetException: Appearance: n
o capability to set material
at javax.media.j3d.Appearance.setMaterial(Appearance.java:210)
at ExSwitch.actionPerformed(ExSwitch.java:459)
at java.awt.MenuItem.processActionEvent(MenuItem.java:500)
at java.awt.MenuItem.processEvent(MenuItem.java:464)
at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:269)
at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:259)
at java.awt.EventQueue.dispatchEvent(Compiled Code)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:68)
after setting app[1]
*/
}
catch (NullPointerException e)
{
System.out.print("inside null pointer");
e.printStackTrace();
}
catch (CapabilityNotSetException e)
{
System.out.print("inside capability null");
e.printStackTrace();
}
System.out.println("after setting app[1]");
return;
}
else if (arg.equals("2. Unlit Solid"))
{
System.out.println("inside 2.");
shape.setAppearance(app[2]);
System.out.println("after shape.setAppearance");
return;
}
else if (arg.equals("Exit"))
{
System.exit(0);
return;
}
} // end of method
} // end of class
