Difference between revisions of "Shader Enhancements"

(New page: Shaders for the ray-tracer are currently coded in C and explicitly added to the active shader list. A shader to bridge the RT shader system to the BSD licensed implementation of OSL ( [htt...)
 
(Add Past Efforts)
 
(7 intermediate revisions by 2 users not shown)
Line 1: Line 1:
Shaders for the ray-tracer are currently coded in C and explicitly added to the active shader list. A shader to bridge the RT shader system to the BSD licensed implementation of OSL ( [http://code.google.com/p/openshadinglanguage/] ) would allow a richer visual capability.
+
BRL-CAD's shader system is custom developed for the librt raytracer.  Shaders are currently coded in C and explicitly added to the active shader list. A question of interest is whether we can utilize work being done for other open source raytracing shader systems to improve the flexibility of BRL-CAD's shader system and take advantage of shaders developed for other systems.
  
This task would involve writing the shader bridge in liboptical as well as a shader editor in mged (with a 'preview' button to raytrace a thumbnail of a sphere using the shader).
+
A proposal should outline what changes are proposed to BRL-CAD's current shaders.  Initial stages would involve either writing the shader bridge in liboptical or designing a new approach (remember though, all existing shader functionality in the current system must be preserved, even if it is re-implemented in some fashion. Be careful about biting off more than you can achieve in a summer.)
  
*Familiarity with C/++
+
=References=
*Familiarity with Tcl/Tk
+
 
 +
This task will require a fair bit of background research in order to put together a compelling proposal - interested students should study BRL-CAD's shader system to determine how it works, and then look at other open source, license compatible systems to see what they may offer.  Candidates include:
 +
 
 +
* http://en.wikipedia.org/wiki/Shading
 +
* http://en.wikipedia.org/wiki/Shader
 +
* http://en.wikipedia.org/wiki/Shading_language
 +
* Sony's Open Shader Language (OSL):  http://opensource.imageworks.com/?p=osl
 +
* Pixie:  http://www.renderpixie.com/
 +
* Yafaray: http://www.yafaray.org/
 +
 
 +
OSL is of particular interest because it is developed specifically for raytracing systems.
 +
 
 +
Code of relevance:
 +
 
 +
* src/liboptical
 +
* include/optical.h
 +
 
 +
Documentation of relevance:
 +
 
 +
* {{pdf|Introduction to MGED|Introduction to MGED}}
 +
** Do lessons 1-7 minimum
 +
* {{pdf|Principles of Effective Modeling|Principles of Effective Modeling}}
 +
** Read Appendix B
 +
* {{pdf|Optical Shaders|BRL-CAD's optical shaders}}
 +
** Provides a broad survey from a developer's perspective
 +
 
 +
=Requirements=
 +
 
 +
*Familiarity with C/C++
 +
 
 +
=Past Efforts=
 +
[http://brlcad.org/wiki/User:Kunigami/GSoc2011/Proposal GSoC11]

Latest revision as of 13:40, 4 March 2015

BRL-CAD's shader system is custom developed for the librt raytracer. Shaders are currently coded in C and explicitly added to the active shader list. A question of interest is whether we can utilize work being done for other open source raytracing shader systems to improve the flexibility of BRL-CAD's shader system and take advantage of shaders developed for other systems.

A proposal should outline what changes are proposed to BRL-CAD's current shaders. Initial stages would involve either writing the shader bridge in liboptical or designing a new approach (remember though, all existing shader functionality in the current system must be preserved, even if it is re-implemented in some fashion. Be careful about biting off more than you can achieve in a summer.)

References[edit]

This task will require a fair bit of background research in order to put together a compelling proposal - interested students should study BRL-CAD's shader system to determine how it works, and then look at other open source, license compatible systems to see what they may offer. Candidates include:

OSL is of particular interest because it is developed specifically for raytracing systems.

Code of relevance:

  • src/liboptical
  • include/optical.h

Documentation of relevance:

Requirements[edit]

  • Familiarity with C/C++

Past Efforts[edit]

GSoC11