Re: 3d Transformation
- From: "Mike C. Fletcher" <mcfletch@xxxxxxxxxx>
- Date: Tue, 29 Nov 2005 20:51:37 -0500
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.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:
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.
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
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