Difference between revisions of "NURBS TODO"

(add a few references, space them out)
(turn them into sections so we have a table of contents)
Line 1: Line 1:
* Optimize BREP/NURBS ray tracing
+
= Optimize BREP/NURBS ray tracing=
 
** Benefit: faster ray tracing runtime
 
** Benefit: faster ray tracing runtime
 
** References:
 
** References:
Line 5: Line 5:
 
*** src/librt/opennurbs_ext.*
 
*** src/librt/opennurbs_ext.*
  
* Optimize BREP/NURBS prep
+
= Optimize BREP/NURBS prep=
 
** Benefit: faster ray tracing runtime, user requested.
 
** Benefit: faster ray tracing runtime, user requested.
 
*** src/librt/primitives/brep/brep.cpp:rt_brep_prep()
 
*** src/librt/primitives/brep/brep.cpp:rt_brep_prep()
 
*** src/librt/opennurbs_ext.*
 
*** src/librt/opennurbs_ext.*
  
 +
=Implicit-to-NURBS=
 
* Implement conversion of implicit primitives to BREP/NURBS primitives.
 
* Implement conversion of implicit primitives to BREP/NURBS primitives.
 
** Partially complete, primitives are fixed at origin, some primitives unimplemented.
 
** Partially complete, primitives are fixed at origin, some primitives unimplemented.
 
** Benefit: partial requirement for interactive visualization of implicit CSG geometry in OpenGL.
 
** Benefit: partial requirement for interactive visualization of implicit CSG geometry in OpenGL.
  
 +
=BREP/NURBS-to-NMG=
 
* Implement conversion of BREP/NURBS to NMG.
 
* Implement conversion of BREP/NURBS to NMG.
 
** Benefit: partial requirement for export and interactive visualization of BREP/NURBS in OpenGL.
 
** Benefit: partial requirement for export and interactive visualization of BREP/NURBS in OpenGL.
  
 +
=BSPLINE/NURBS review=
 
* Identify useful concepts implemented in the old BSPLINE/NURBS code that are not present in openNURBS.
 
* Identify useful concepts implemented in the old BSPLINE/NURBS code that are not present in openNURBS.
 
** Benefit: code reuse, potentially very useful functionality.
 
** Benefit: code reuse, potentially very useful functionality.
  
 +
=BSPLINE/NURBS reuse=
 
* Port any useful BSPLINE/NURBS code to openNURBS data structures and routines.
 
* Port any useful BSPLINE/NURBS code to openNURBS data structures and routines.
 
** Benefit: code reduction, allows the old BSPLINE/NURBS code to be removed after functionality is migrated.
 
** Benefit: code reduction, allows the old BSPLINE/NURBS code to be removed after functionality is migrated.
  
 +
=BREP/NURBS CSG evaluation=
 
* Implement boolean evaluation of BREP/NURBS surfaces.
 
* Implement boolean evaluation of BREP/NURBS surfaces.
 
** Benefit: partial requirement for interactive visualization of BREP/NURBS in OpenGL.
 
** Benefit: partial requirement for interactive visualization of BREP/NURBS in OpenGL.
  
 +
=Plate-mode BREP/NURBS=
 
* Implement plate mode BREP/NURBS objects.
 
* Implement plate mode BREP/NURBS objects.
 
** Similar, if not identical, to plate mode BoTs, 'brep' objects need the ability to have a thickness described so you could automatically handle non-solid NURBS and sheet-metal style geometry without requiring surface solidity.
 
** Similar, if not identical, to plate mode BoTs, 'brep' objects need the ability to have a thickness described so you could automatically handle non-solid NURBS and sheet-metal style geometry without requiring surface solidity.
 
** Benefit: allows for import and visualization of BREP/NURBS surfaces that are not solid.
 
** Benefit: allows for import and visualization of BREP/NURBS surfaces that are not solid.
  
 +
=Implicit CSG to BREP/NURBS CSG test scripts=
 
* Develop test scripts for comparing conversion of implicit CSG to BREP/NURBS CSG
 
* Develop test scripts for comparing conversion of implicit CSG to BREP/NURBS CSG
 
** Benefit: provides validation and verification via ray tracing.
 
** Benefit: provides validation and verification via ray tracing.
  
 +
=BREP/NURBS documentation=
 
* Document the new BREP/NURBS primitive.
 
* Document the new BREP/NURBS primitive.
 
** Benefit: provides user documentation explaining capabilities, limitations, and benefits.
 
** Benefit: provides user documentation explaining capabilities, limitations, and benefits.
  
 +
=Cache objects=
 
* Implement data cache objects.
 
* Implement data cache objects.
 
** Create new LIBRT API routines for storing cache data in a v5 container.  This would amount to storing binary data into a 'binunif' object marked as hidden with attributes for date/time stamping and MD5 or SHA256 checksumming.
 
** Create new LIBRT API routines for storing cache data in a v5 container.  This would amount to storing binary data into a 'binunif' object marked as hidden with attributes for date/time stamping and MD5 or SHA256 checksumming.
 
** Benefit: faster ray tracing runtime, applicable to other primitives (NMG, BoT).
 
** Benefit: faster ray tracing runtime, applicable to other primitives (NMG, BoT).
  
 +
=Cache prep results=
 
* Cache BREP/NURBS prep results to a specified cache file.
 
* Cache BREP/NURBS prep results to a specified cache file.
 
** Benefit: faster ray tracing runtime for BREP/NURBS, user requested.
 
** Benefit: faster ray tracing runtime for BREP/NURBS, user requested.
  
* Improve BREP/NURBS wireframe.
+
=BREP/NURBS wireframe=
** Investigate using knots on subcurves.
+
* Improve BREP/NURBS wireframe. Investigate using knots on subcurves.
 
** Benefit: faster wireframe, more detailed close wireframes.
 
** Benefit: faster wireframe, more detailed close wireframes.
  
* BREP/NURBS source code cleanup.
+
= BREP/NURBS source code cleanup=
** Consolidate Owens and Reeves approaches to ray intersection.
+
* Consolidate Owens and Reeves approaches to ray intersection.
 
** Benefit: improved code maintainability.
 
** Benefit: improved code maintainability.
  
 +
= BREP/NURBS healing=
 
* Implement an rt_heal(rt_db_internal *dbi); routine.
 
* Implement an rt_heal(rt_db_internal *dbi); routine.
 
** The routine tightens up trimming curves and edge/vertex pairings so that they align perfectly while still preserving the topological structure.
 
** The routine tightens up trimming curves and edge/vertex pairings so that they align perfectly while still preserving the topological structure.
  
* Write an report on using NURBS for analysis purposes.
+
= BREP/NURBS for analysis purpose report=
  
* Perform analytic comparison of BREP/NURBS and BoT geometry
+
= Analytic comparison of BREP/NURBS and BoT=
  
* Perform analytic comparison of BREP/NURBS CSG and implicit CSG geometry
+
= Analytic comparison of BREP/NURBS CSG and implicit CSG=
 
+
* Implement support for rotation, scaling, and translations.
+

Revision as of 16:06, 14 February 2011

Optimize BREP/NURBS ray tracing

    • Benefit: faster ray tracing runtime
    • References:
      • src/librt/primitives/brep
      • src/librt/opennurbs_ext.*

Optimize BREP/NURBS prep

    • Benefit: faster ray tracing runtime, user requested.
      • src/librt/primitives/brep/brep.cpp:rt_brep_prep()
      • src/librt/opennurbs_ext.*

Implicit-to-NURBS

  • Implement conversion of implicit primitives to BREP/NURBS primitives.
    • Partially complete, primitives are fixed at origin, some primitives unimplemented.
    • Benefit: partial requirement for interactive visualization of implicit CSG geometry in OpenGL.

BREP/NURBS-to-NMG

  • Implement conversion of BREP/NURBS to NMG.
    • Benefit: partial requirement for export and interactive visualization of BREP/NURBS in OpenGL.

BSPLINE/NURBS review

  • Identify useful concepts implemented in the old BSPLINE/NURBS code that are not present in openNURBS.
    • Benefit: code reuse, potentially very useful functionality.

BSPLINE/NURBS reuse

  • Port any useful BSPLINE/NURBS code to openNURBS data structures and routines.
    • Benefit: code reduction, allows the old BSPLINE/NURBS code to be removed after functionality is migrated.

BREP/NURBS CSG evaluation

  • Implement boolean evaluation of BREP/NURBS surfaces.
    • Benefit: partial requirement for interactive visualization of BREP/NURBS in OpenGL.

Plate-mode BREP/NURBS

  • Implement plate mode BREP/NURBS objects.
    • Similar, if not identical, to plate mode BoTs, 'brep' objects need the ability to have a thickness described so you could automatically handle non-solid NURBS and sheet-metal style geometry without requiring surface solidity.
    • Benefit: allows for import and visualization of BREP/NURBS surfaces that are not solid.

Implicit CSG to BREP/NURBS CSG test scripts

  • Develop test scripts for comparing conversion of implicit CSG to BREP/NURBS CSG
    • Benefit: provides validation and verification via ray tracing.

BREP/NURBS documentation

  • Document the new BREP/NURBS primitive.
    • Benefit: provides user documentation explaining capabilities, limitations, and benefits.

Cache objects

  • Implement data cache objects.
    • Create new LIBRT API routines for storing cache data in a v5 container. This would amount to storing binary data into a 'binunif' object marked as hidden with attributes for date/time stamping and MD5 or SHA256 checksumming.
    • Benefit: faster ray tracing runtime, applicable to other primitives (NMG, BoT).

Cache prep results

  • Cache BREP/NURBS prep results to a specified cache file.
    • Benefit: faster ray tracing runtime for BREP/NURBS, user requested.

BREP/NURBS wireframe

  • Improve BREP/NURBS wireframe. Investigate using knots on subcurves.
    • Benefit: faster wireframe, more detailed close wireframes.

BREP/NURBS source code cleanup

  • Consolidate Owens and Reeves approaches to ray intersection.
    • Benefit: improved code maintainability.

BREP/NURBS healing

  • Implement an rt_heal(rt_db_internal *dbi); routine.
    • The routine tightens up trimming curves and edge/vertex pairings so that they align perfectly while still preserving the topological structure.

BREP/NURBS for analysis purpose report

Analytic comparison of BREP/NURBS and BoT

Analytic comparison of BREP/NURBS CSG and implicit CSG