Subject:  HBSURF: V1.0, H Spline Modeler
Author:  Richard C. Davis and Yizhou Yu
Uploaded By:  PCR Oliver
Date:  12/14/1998

File:  HBSURF.ZIP (90591 bytes) 
Estimated Download Time (33696 baud):  < 1 minute
Download Count:  111

Needs:  Win 95/NT

Keywords:  Richard C. Davis, Yizhou Yu, Utility, Modeler  BSpline, FD

Type:       Freeware

Copyright (See distribution notice below.) 

"HBSurf" is a Hierarchical B-Spline modeler very similar  to the one described by David R. Forsey and Richard H. Bartels in their SIGGRAPH '88 paper, Hierarchical  B-Spline Refinement." It allows a user to create smooth  patches of surface with fine details and export these patches to files that can be rendered by the public domain ray-tracer, POV-ray.

This modeler is "hierarchical" because it allows points on the patches surface to be manipulated at many "levels." At a low level, moving points on the surface will create large bulges around those points. At a higher level, moving those same points will create smaller bulges. Thus, manipulating points creates "coarse" changes at low levels and "fine" changes at high levels.

This modeler was created as a class project for a Computer Aided Geometric Modeling class. Its interface is rather clunky, but, with some patience, it can be used to create very detailed surface patches for use  with POV-ray, or just for kicks!

Email ALL Questions & Comments to: rcdavis@cs.berkeley.edu 
or: Yizhou Yu - yyz@cs.berkeley.edu

Copyright 1998 Richard C. Davis and Yizhou Y

NOTE: To run HBSurf, just type "hbsurf" from a Windows95 or WindowsNT prompt or click on its icon.  If you run HBSurf from a prompt, you have the option of entering the name of an "hbs" file saved earlier by HBSurf.

Documents: Readme.txt

JD