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DoG4
03-23-2002, 02:26 PM
Is there any darn tutorial out there which explains how to project textures out there? All I have found was articles which say that you need to apply a texture matrix and so forth (as in the redbook), but no mention on how to get that matrix. I beleive to have a good understanding of object matrices, but the projection matrices are just a book with seven seals.

cheers,
- DoG4

Olumide
03-23-2002, 05:22 PM
Originally posted by DoG4:
... I beleive to have a good understanding of object matrices, but the projection matrices are just a book with seven seals.



I quite agree ... I've been having trouble with these projection matrix /texture stack matters lately. It appers everyone concentates on explaining the concept of vertex transformation at the expense of texture transformation ...

Anyways here's what I've found so far ... I hope it helps you more than it has helped me ...

http://www.cs.unc.edu/~hoff/techrep/projtextures.html
http://www.opengl.org/developers/code/sig99/advanced99/notes/node80.html


[This message has been edited by Olumide (edited 03-23-2002).]

DoG4
03-24-2002, 01:49 PM
Thanks, it seems useful. I have just shortly checked them. However, I am still looking for a pictorial description, which actually shows how the matrices are calculated.

- D.G

Olumide
03-25-2002, 03:34 AM
Originally posted by DoG4:
Thanks, it seems useful. I have just shortly checked them. However, I am still looking for a pictorial description, which actually shows how the matrices are calculated.

- D.G


I know what you mean ... I'm having the same problem as well ... never the less here are a few more links; unfortunately they do not attempt to take us DOWN THE TEXTURE PIPELINE http://www.opengl.org/discussion_boards/ubb/frown.gif ...
www.cse.unsw.edu.au/~cs9018/readings/projective_texture_mapping.pdf (http://www.cse.unsw.edu.au/~cs9018/readings/projective_texture_mapping.pdf)
www.cse.unsw.edu.au/~cs9018/lectnotes/ps/pt7.pdf (http://www.cse.unsw.edu.au/~cs9018/lectnotes/ps/pt7.pdf) [Pg 33 - 86]
www.developer.nvidia.com/docs/IO/1252/ATT/ShadowMapping.pdf (http://www.developer.nvidia.com/docs/IO/1252/ATT/ShadowMapping.pdf) [Pg 31 - 35]
Fast Shadows and lighting effects Using Texture Mapping by Segal et al SIGGRAPH 1992 [Pg 249 - 252]


[This message has been edited by Olumide (edited 03-25-2002).]

Olumide
03-25-2002, 06:27 AM
Wouldnt it be lovely if someone wrote an article about A TRIP DOWN THE TEXTURE PIPELINE ... ? ... we've heared so much about the object/vertex pipeline

[This message has been edited by Olumide (edited 03-25-2002).]