Tyler Eaves wrote: >Got a 3d algorithmns question. Algorithmn will be implemented in python, >so a library would be great if it works on windows. Basically my function >would be defined as such. > >Problem is one of coordinate transformation. Give a 3d vector, which >reprents the +z axis in the source coordinate system, and a rotation value >around that axis for determinging the x and y axises, I wish to translate >a point from that geometry into "world" geometry, or in other words >absolute coordinates. Input data is a 3d path with banking data that will >be sampled at regular points for purposes of building other geometry. > > You can find code for doing this in the OpenGLContext project. The lowest-level code is in the vrml.vrml97.transformmatrix module, which just generates matrices for the various transformations, rotations and scales. You can find the module here:
http://cvs.sourceforge.net/viewcvs.py/pyopengl/vrml/vrml97/transformmatrix.py?view=markup the module also allows for generating inverse arrays (what you use for transforming from outer coordinates to inner, instead of inner to outer), and has an accelerator C module for much of the functionality. The higher levels in OpenGLContext support compositing multiple transformations in a containment hierarchy for a scenegraph. See e.g. OpenGLContext/scenegraph/transform and OpenGLContext/scenegraph/nodepath module for that higher-level stuff. Anyway, hope this helps, Mike -- ________________________________________________ Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com -- http://mail.python.org/mailman/listinfo/python-list
