This is an archive of CompuServe forum messages from 1985 to 1995, as saved in transcripts by John Foust.
Search Results (5 messages)
AAAAAHHHHHH! I found the solution!!! PROBLEM STATEMENT: 3DS file keyframes are incremental. Find absolute rotations for each keyframe. BAD SOLUTION: Convert each rot keyframe to a 4×4 matrix. Find the accumulated rotation by concatenating the new matrix with previous keyframe rotation matrices. Convert the resulting matrix back into a quaternion.…
Grant- >> >> Sometimes the axis is and sometimes it is , but the sign of the angle is not inverting. This is causing our animated model suddenly change heading by 90 degrees. Is this in some way related to quaternions? Is this happening on a key to key basis…
#3ds file: rot keyframes
Message #196879
We are using the 3D Studio Release 3 File Toolkit to read in mesh and keyframe info. Our model is rotating a small amount around the axis . We figured out that while the translations are absolute, the rotations are incremental. Sometimes the axis is and sometimes it is ,…
#3DS file toolkit docs.
Message #195757
I'm using the 3D Studio Release 3 File Toolkit to load models. The documentation that came with the FTK explains exactly what is in the file, but not how this data is interrelated. This makes it difficult to reconstruct my model in my rendering package. I would be grateful if…
#3ds files; pivots, keyfr
Message #195664
For the local .3ds file guru, I'm using the 3D Studio Release 3 File Toolkit to read a 3ds file that represents a simple mesh heirarchy. My first question is, to which point are the pivot and keyframe position data with respect to. Secondly, I noticed that the child mesh…