I don’t understand how exactly works the skew transform of a <node>. Please someone can explain me that and how can I compute this skew transform on a matrix ?
Second bonus question The transformations, need to be processed into theirs arrival order right ? But it is possible to find some transforms, next an instance of geometry or camera for exemple, next again some transforms and again an instance ?
No, all transforms come before nodes or instances.
about the skew implementation: it’s the same as the skew - transform found in the renderman specification. Ask google about that, and you might also take a look into this code:
http://www.koders.com/cpp/fidA08C276050 … C5BA1.aspx
(search for the GMANMatrix4::skew implementation)
This code is from the http://gman-toolkit.sourceforge.net/ - project.