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The error message you report:
NullPointerException at
Javax.media.j3d.ImageComponent2D<init>(ImageComponent2D.java:166)
is coming from a NullPointerException apparently when you
execute line:
Texture2D texture =
new Texture2D(Texture.BASE_LEVEL,
Texture.RGB,
image.getWidth(), image.getHeight()) ;
you might try check for null before you try to use the
image object in this line.
i.e.:
if (image != null) Texture2D texture = new
Texture2D(Texture.BASE_LEVEL,
Texture.RGB,
image.getWidth(), image.getHeight()) ;
of even put your line in its own try/catch
block.
Charles
----- Original Message -----
Sent: Sunday, July 15, 2001 8:01 PM
Subject: [JAVA3D] works as an application
but not as an applet for ImageComponent2D
Hi Java3D:
I can get my program to run as an application. But, when I try to run
it as an
applet I get a null pointer exception in my ImageComponent2D.
I am a newbie so I do not know where I am going wrong.
What is it that I do not know?
Can I get a clue?
Michael Carter, student
----------------------- see below -----------------------
This methods gives a NullPointerException
at
Javax.media.j3d.ImageComponent2D<init>(ImageComponent2D.java:166)
void getTextures()
{
System.out.println("attempt to load
texture from file: " + "sky.jpg" );
tex =
new TextureLoader("sky.jpg", new String("RGB"),
this);
textureAppear = new Appearance[5]
;
String[] filename = new String[6] ;
filename[0] = new
String("file:./computer.jpg") ;
filename[1]
= new String("file:./circuit.jpg") ;
filename[2] = new String("file:./wall.jpg")
;
filename[3] = new
String("file:./wall2.jpg") ;
filename[4] =
new String("file:./ground.jpg") ;
for( int i = 0; i < 5;
i++)
{
System.out.println("attempt to load texture from file:
"+filename[i]);
TextureLoader loader = null
;
try
{
loader = new TextureLoader( new URL( filename[i] ),
this);
}
catch
(java.net.MalformedURLException
e)
{
System.out.println( e.getMessage() )
;
System.exit(1)
;
}
ImageComponent2D image =
loader.getImage() ;
Texture2D texture = new Texture2D(Texture.BASE_LEVEL,
Texture.RGB,
image.getWidth(), image.getHeight()) ;
if(image ==
null)
System.out.println("load failed for texture: "+filename[i]) ;
texture.setImage(0,
image);
texture.setEnable(true);
texture.setMagFilter(Texture.BASE_LEVEL_LINEAR);
texture.setMinFilter(Texture.BASE_LEVEL_LINEAR);
textureAppear[i] = new Appearance()
;
textureAppear[i].setTexture(texture) ;
}
}
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