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  [Need Help]Java3D mipmap problem!  (Read 1249 times)
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Offline jiahan

Junior Newbie




Java games rock!


« Posted 2005-03-23 14:03:44 »

When I use mipmap mode in Texture component, I will get following error message..
----------------------------------------
java.lang.NullPointerException
   at javax.media.j3d.TextureRetained.checkSizes(TextureRetained.java:406)
   at javax.media.j3d.TextureRetained.setLive(TextureRetained.java:943)
   at javax.media.j3d.TextureUnitStateRetained.setLive(TextureUnitStateRetained.java:471)
   at javax.media.j3d.AppearanceRetained.setLive(AppearanceRetained.java:927)
   at javax.media.j3d.Shape3DRetained.doSetLive(Shape3DRetained.java:1066)
   at javax.media.j3d.Shape3DRetained.setLive(Shape3DRetained.java:891)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.TransformGroupRetained.setLive(TransformGroupRetained.java:549)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.BranchGroupRetained.setLive(BranchGroupRetained.java:160)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.TransformGroupRetained.setLive(TransformGroupRetained.java:549)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.BranchGroupRetained.setLive(BranchGroupRetained.java:160)
   at javax.media.j3d.GroupRetained.childCheckSetLive(GroupRetained.java:2132)
   at javax.media.j3d.GroupRetained.checkSetLive(GroupRetained.java:1527)
   at javax.media.j3d.GroupRetained.checkSetLive(GroupRetained.java:1448)
   at javax.media.j3d.GroupRetained.doAddChild(GroupRetained.java:483)
   at javax.media.j3d.GroupRetained.addChild(GroupRetained.java:456)
   at javax.media.j3d.Group.addChild(Group.java:266)
------------------------------------------------------

The code(I use setInterleavedVertexBuffer(J3DBuffer) to set geometry's vertex data):-----------------------------------------
Appearance a = new Appearance();
       Material m = new Material(new Color3f(0.6f,0.6f,0.6f), new Color3f(0,0,0),
               new Color3f(1,1,1), new Color3f(0.8f,0.8f,0.8f),32);
       TextureLoader loader = new TextureLoader(image,"RGBA",
               TextureLoader.BY_REFERENCE|TextureLoader.GENERATE_MIPMAP, null);
       ImageComponent2D tImage = loader.getImage();
       int textureSize =
               RenderingCapabilityManager.getTextureSize(new Dimension(tImage.getWidth(),
               tImage.getHeight()));
       Dimension size = new Dimension(textureSize, textureSize);
       Shape3D shape = new Shape3D(this.createPlane(v), a);
       Texture2D texture =
               new Texture2D(RenderingCapabilityManager.getMipMapMode(),
               Texture.RGBA,size.width, size.height);
       int imageLevel =0;
       boolean mipMode =
               RenderingCapabilityManager.getMipMapMode()
               ==Texture.MULTI_LEVEL_MIPMAP;
       TextureAttributes ta = new TextureAttributes();
       TextureUnitState[] tus = new TextureUnitState[1];
       tus[0] =  new TextureUnitState(texture, ta, null);
       PolygonAttributes pa =
               new PolygonAttributes(PolygonAttributes.POLYGON_FILL,
               PolygonAttributes.CULL_NONE, 0, true);
       TransparencyAttributes tta = new TransparencyAttributes(TransparencyAttributes.NICEST, 1f);
       ta.setTextureMode(TextureAttributes.REPLACE);
       
       pa.setUserData(false);//don't modify PolygonAttributes
       a.setPolygonAttributes(pa);
       a.setTransparencyAttributes(tta);
       do{
           tImage = loader.getScaledImage(size.width, size.height);
           texture.setImage(imageLevel++, tImage);
           System.out.println(tImage);
           size.width >>=1;
           size.height >>=1;
       }while(size.width>1 && size.height >1 &&
               mipMode);
       texture.setMaximumLevel(imageLevel-1);
       //System.out.println(texture.getImage(imageLevel-1));
       a.setTextureUnitState(tus);
       a.setMaterial(m);
-------------------------------------------
But if I did't use mipmap mode, use baselevel mode, every thing is working fine..
I do't know why...Is everyone can help me~

My JDK is 1.5,Java3D API is 1.3.1(OpenGl) and video card is Geforce6800 Ultra
Thanks...
Offline misterX

Junior Duke




java forever!


« Reply #1 - Posted 2005-03-30 16:26:06 »

is your texture size a power of 2?
(if not, that may be the source of the error)
Offline jiahan

Junior Newbie




Java games rock!


« Reply #2 - Posted 2005-03-31 01:33:53 »

Yes, my texture is power of 2, and if I use beas level model, it's all working fine....
Does everyone know why? Huh
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Offline shawnkendall

Senior Duke





« Reply #3 - Posted 2006-04-25 16:51:40 »

DId you ever resolve this error?

I am getting it all of a sudden too.

Thanks for any help!

Shawn Kendall
Cosmic Interactive, LLC
http://www.facebook.com/BermudaDash
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