Hi,
i just wanted to say that it worked fine and fast.
I not used 2^n sized images, but setScale(false)
and calculated a suitable TransformationMatrix for the
TextureTransformChunk to have the whole geometry covered.
Tanks,
Daniel
Hi Daniel, hi Andreas,
// Change image and texture.
unsigned int *dst = (unsigned int *) _image->getData();
// now copy some pixels into the image
*dst++ = ...
beginEditCP(image);
endEditCP(image);
Hmm, not a perfect example. You should call beginEditCP before the
changes, as it might have to create a separate copy of the data for the
aspect. If you do it afterwards it might fail, because you changed te old
version of it.
beginEditCP(xchunk, TextureChunk::ImageFieldMask);
xchunk->imageContentChanged();
endEditCP(xchunk, TextureChunk::ImageFieldMask);
I use this kind of code for a video texture. The image should have a
size of 2^n!
You can use non-2^n textures if you call setScale(false) on the
TextureChunk. In that case the image will only fill the lower left part of
the next bigger 2^n texture and will not be scaled (which takes forever,
as it uses gluScaleImage). You will have to adjust your texture
coordinates accordingly, or use a TextureMatrixChunk to correct for the
texture only being partially used.
Hope it helps
Dirk
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