Pierce: I already see the repo, i kwnow now the difference and is not the problem i have now. I made the suggestion for book draft i found, because theres is no example on it. Thanks for answer.
Stephan : Yes, as Esteban said i´m using that, I´m extending (or trying) Esteban´s project. And i´m having the problem that esteban metioned. Thanks for answer. Ben: I have in C the same example as in Pharo using the physics of CHipmunk, and in C is working fine, there is a problem in the call to the function from Pharo in 64 bits. Thanks for answer. 2017-09-17 12:11 GMT-03:00 Ben Coman <b...@openinworld.com>: > > On Fri, Sep 15, 2017 at 9:42 PM, alvaro piorno <alvaropiorno...@gmail.com> > wrote: > >> Hi everybody, i´m using UnifiedFFI with Chipmunk2D library . >> I want to get a pointer to a C Structure (cpBody) and set a position to >> it. >> I have a subClass of FFIOpaqueObject to handle pointer. >> >> This is the "new " ffiCall : >> self ffiCall: #(cpBody* cpBodyNew(cpFloat m, cpFloat i)) >> >> And this is a "seter" ffiCall: >> >> self ffiCall: #( void cpBodySetPosition( self, cpVect vector ) ). >> >> I`m not getting any "error" but the position is not updating. >> I tried the same using Chipmunk directly and it works, so there is a >> problem with what i have in Pharo. >> > > A general approach might be to write your own C wrapper around Chipmunk > library functions which > just does a debug printout of parameters before calling the wrapped > function. > Use these for both from Pharo and your "direct" trial, and see how they > compare. > > cheers -ben > >
