Hi Pau,
Pau Moreno wrote:
Hi,
I've create an int matrix[16][256] and I need to pass it to the GPU.
So what I've done is create a osg::Image, but when I have to pass the
data to setImage, I have to do a cast to my data, because it needs an
unsigned char *.
The unsigned char * is just to get the start of your data, it won't
throw away information of your data. E.g. we are passing floats and
still just point this parameter at the start of the data.
My matrix contains signed ints so I cannot cast it to a unsigned
char, as I loose information. How can I do it?
The problem is not the unsigned char *, but the pixel format of the
texture you are passing the data into. You will have to find an int
pixel format that supports signed (I'm not sure one exists) or you will
have to switch to 16/32 bit float pixel formats on the GPU. The
osgprerender has a float path that can give you some hints.
How are you going to process the data? Do you want to do rendering or
GPGPU work?
regards
jp
Thanks!
Cheers, Pau
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