Oops :-(
>From: Bob Dengle <[EMAIL PROTECTED]>
>Reply-To: Discussion list for Java 3D API <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: [JAVA3D] Changing the color of a Shape3D
>Date: Tue, 26 Jun 2001 16:21:22 -0700
>
>Without knowing the exact code you use to get the appearance attributes, i
>would suggest that you try setting Material.ALLOW_COMPONENT_READ and
>Material.ALLOW_COMPONENT_WRITE .
>
>-B.D.
>
>
>>From: Kynn Jones <[EMAIL PROTECTED]>
>>Reply-To: Discussion list for Java 3D API <[EMAIL PROTECTED]>
>>To: [EMAIL PROTECTED]
>>Subject: [JAVA3D] Changing the color of a Shape3D
>>Date: Tue, 26 Jun 2001 18:23:40 -0400
>>
>>Surely it cannot be so insanely difficult to do something this simple.
>>I am trying to write code to change the color of a Shape3D object.
>>The Shape3D object is created using this method:
>>
>> private Box makeBox(Color3f color) {
>> Appearance app = new Appearance();
>> app.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_READ);
>> app.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE);
>>
>> // adding the next two lines makes no difference
>> // app.setCapability(Appearance.ALLOW_MATERIAL_READ);
>> // app.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
>>
>> Box box = new Box(0.2f, 0.2f, 0.2f, app);
>>
>> ColoringAttributes ca = new ColoringAttributes(color,
>>ColoringAttributes.FASTEST);
>> app.setColoringAttributes(ca);
>>
>> box.setCapability(Shape3D.ALLOW_APPEARANCE_READ);
>> box.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
>>
>> // adding the next line makes no difference
>> // box.setCapability(Primitive.ENABLE_APPEARANCE_MODIFY);
>>
>> return box;
>> }
>>
>>Still, I get the runtime error:
>>
>> javax.media.j3d.CapabilityNotSetException: Shape3D: no capability to
>>get
>>appearance
>> at javax.media.j3d.Shape3D.getAppearance(Shape3D.java:430)
>> at
>>com.sun.j3d.utils.geometry.Primitive.getAppearance(Primitive.java:166)
>> at
>>MyPickCallbackApp$MyCallbackClass.transformChanged(MyPickCallbackApp.java:33)
>>
>> ...
>>
>>(Notice that the error happens even when the code attempts to get--not
>>change--the appearance.)
>>
>>This seems to contradict the following (from the Archives):
>>
>> Date: Tue, 14 Sep 1999 06:58:24 -0700
>> From: Kevin Rushforth <[EMAIL PROTECTED]>
>> Subject: Re: Changing Sphere Color
>>
>> Since you can create your own appearance and use that appearance to
>> construct a [Shape3D], you have full control over the capability bits
>> that are set in the appearance.
>>
>>I've jumped through every hoop I can think of to get this to work.
>>
>>Any suggestions?
>>
>>Thanks!
>>
>>KJ
>>
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>
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