esnho

I'm trying to set an array of long to a jitter matrix but looks like the values have a weird offset.

I've wrote a gist with a snippet of code that can reproduce the isse.

It basically fills the matrix with a counter value.

https://gist.github.com/esnho/c6a86d82e8f18a812c9edef4448a529c

And attached below you can see the difference between reading the matrix from a Max object and printing the values directly from C, what's going on?

Screenshot 2020-09-20 at 12.49.39.png

Screenshot 2020-09-20 at 12.49.33.png

I've wrote a gist with a snippet of code that can reproduce the isse.
It basically fills the matrix with a counter value.
https://gist.github.com/esnho/c6a86d82e8f18a812c9edef4448a529c

And attached below you can see the difference between reading the matrix from a Max object and printing the values directly from C, what's going on?

Hello,
I'm trying to set an array of long to a jitter matrix but looks like the values have a weird offset.
I've wrote a gist with a snippet

how-to-set-an-array-of-long-to-jitter-matrix-properly

i believe you need to set 2 flags in the matrix info struct in order to successfully execute your code

info.flags = JIT_MATRIX_DATA_REFERENCE | JIT_MATRIX_DATA_PACK_TIGHT;

since your creating as data-reference, you also need to explicitly set the matrix size:

info.size = info.dim[0] * info.planecount * SIZE_INT32;

the other tricky bit is long as your data array type is not correct on all platforms. long data type in jitter is actually implemented as int (actually t_int32). and not on all platforms is sizeof(long) == sizeof(int).

so you should create an int array instead of long, and pass that to the matrix data call.

give that a try and let us know if that works.

That's works well, I've commented the gist to reflect the changes.

https://gist.github.com/esnho/c6a86d82e8f18a812c9edef4448a529c#gistcomment-3464921

How to set an array of long to jitter matrix properly?