https://github.com/bhouston/beziercurvedemo1997

Utah Teapot and Mystify Screensaver, 16-Bit DOS, Personal Project 1997 https://files.scene.org/view/mirrors/hornet/code/tutors/math/azr_bcrv.zip
https://github.com/bhouston/beziercurvedemo1997

computer-graphics demoscene dos

Last synced: about 2 months ago
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Utah Teapot and Mystify Screensaver, 16-Bit DOS, Personal Project 1997 https://files.scene.org/view/mirrors/hornet/code/tutors/math/azr_bcrv.zip

• Host: GitHub
• URL: https://github.com/bhouston/beziercurvedemo1997
• Owner: bhouston
• Created: 2014-12-07T01:00:25.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2022-08-04T01:59:01.000Z (over 2 years ago)
• Last Synced: 2024-10-11T01:18:29.997Z (2 months ago)
• Topics: computer-graphics, demoscene, dos
• Language: C++
• Homepage: https://benhouston3d.com
• Size: 103 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        

Azure Bezier and B-Spline Examples

plash  [[email protected]]

July 29, 1997

Desciption

This stuff isn't much.  Its just a little bit of what I wrote in the last

month or so.  There isn't that much source with b-splines or bezier patches

out there so here is my addition.  The techniques used can be speed up

tramendously, they couldn't be much slower ;).  I tried to do everything

by the book.  No optimized matrix multiplications or anything like that.

Notice that I am using bias matrices and control point matrices.

Finding the Normals

The only thing of interest to people who have already done these types of

parametric curves it the way I calculate the normals to the curves and

surfaces.  Unlike the method taugh in AART (see below) I determine by normals

using pure calculus.  I use a derivative matrix and by multiplying the b-spline

or bezier bais matrix by the derivative matrix I determine the derivative bias

matrix.  Now by replacing the normal bias matrix with the derivative bias matrix

I now calculate a vector tangent to the curve at the supplied parameter.  (I

am proud of the fact that I came up with the idea of a derivative matrix and

actually found a use for it.  If anyone has heard of it before please tell me

from where you heard it.  Thanks! )

How To Do This

Get either Advance Animation and Rendering Techniques(AART from above) or

Computer Graphics Principles and Practice.  For the subject of parametric

curves, AART is probably the better choice.  Personally I have a copy of both.

Tell Me What You Think

If you have any suggestions or questions I will respond the best I can.

E-mail me at work to dispell the bordem: [email protected] !!!  Or join #coders

at "irc.stealth.net"!!!

Hellos to...

AZURE: Asch, Mundane.

INTRA: Omega, Perlude, the guy with 3DSMAX, and the guy who loves Final Fantasy!

#Coders: Xyz (nothing), Jaffar (isreali guy), and Bimba (thanks for the blobbies).

And of course anyone who loves the scene !!!!!