Difference between revisions of "NURBS TODO"

(add link to Martin paper)
(stub in the rest)
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= Optimize BREP/NURBS ray tracing=
 
= Optimize BREP/NURBS ray tracing=
* Benefit: faster ray tracing runtime
+
* Benefit: faster ray tracing runtime, user visible
 +
* Time Estimate: 2 days
 
* References:
 
* References:
 
** src/librt/primitives/brep
 
** src/librt/primitives/brep
Line 7: Line 8:
 
= Optimize BREP/NURBS prep=
 
= Optimize BREP/NURBS prep=
 
* Benefit: faster ray tracing runtime, user requested.
 
* Benefit: faster ray tracing runtime, user requested.
 +
* Time Estimate: 2 days
 +
* References:
 
** 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.*
Line 13: Line 16:
 
Implement conversion of implicit primitives to BREP/NURBS primitives. Partially complete, primitives are fixed at origin, some primitives unimplemented.
 
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.
 
* Benefit: partial requirement for interactive visualization of implicit CSG geometry in OpenGL.
 +
* Time Estimate: 3 days
 +
* References:
 +
** src/librt/primitives/${PRIM}/${PRIM}_brep.cpp
  
 
=BREP/NURBS-to-NMG=
 
=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.
 +
* Time Estimate: 1 day
 +
* References:
 +
** src/librt/primitives/brep/brep.cpp:rt_brep_tess()
  
 
=BSPLINE/NURBS review=
 
=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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=BSPLINE/NURBS reuse=
 
=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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=BREP/NURBS CSG evaluation=
 
=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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=Plate-mode BREP/NURBS=
 
=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.
 
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.
 
* Benefit: allows for import and visualization of BREP/NURBS surfaces that are not solid.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=Implicit CSG to BREP/NURBS CSG test scripts=
 
=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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=BREP/NURBS documentation=
 
=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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=Cache objects=
 
=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.
 
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).
 
* Benefit: faster ray tracing runtime, applicable to other primitives (NMG, BoT).
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=Cache prep results=
 
=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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
=BREP/NURBS wireframe=
 
=BREP/NURBS wireframe=
 
Improve 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.
 +
* Time Estimate:
 +
* References:
 +
**
  
 
= 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.
 
+
* Time Estimate:
Reference: http://www.cs.utah.edu/~shirley/papers/raynurbs.pdf
+
* References:
 +
** http://www.cs.utah.edu/~shirley/papers/raynurbs.pdf
  
 
= BREP/NURBS healing=
 
= 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.
 
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.
 +
* Benefit:
 +
* Time Estimate:
 +
* References:
 +
**
  
 
= BREP/NURBS for analysis purpose report=
 
= BREP/NURBS for analysis purpose report=
 +
Description needed here.
 +
* Benefit:
 +
* Time Estimate:
 +
* References:
 +
**
  
 
= Analytic comparison of BREP/NURBS and BoT=
 
= Analytic comparison of BREP/NURBS and BoT=
 +
Description needed here.
 +
* Benefit:
 +
* Time Estimate:
 +
* References:
 +
**
  
 
= Analytic comparison of BREP/NURBS CSG and implicit CSG=
 
= Analytic comparison of BREP/NURBS CSG and implicit CSG=
 +
Description needed here.
 +
* Benefit:
 +
* Time Estimate:
 +
* References:
 +
**

Revision as of 01:07, 15 February 2011

Optimize BREP/NURBS ray tracing

  • Benefit: faster ray tracing runtime, user visible
  • Time Estimate: 2 days
  • References:
    • src/librt/primitives/brep
    • src/librt/opennurbs_ext.*

Optimize BREP/NURBS prep

  • Benefit: faster ray tracing runtime, user requested.
  • Time Estimate: 2 days
  • References:
    • 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.
  • Time Estimate: 3 days
  • References:
    • src/librt/primitives/${PRIM}/${PRIM}_brep.cpp

BREP/NURBS-to-NMG

Implement conversion of BREP/NURBS to NMG.

  • Benefit: partial requirement for export and interactive visualization of BREP/NURBS in OpenGL.
  • Time Estimate: 1 day
  • References:
    • src/librt/primitives/brep/brep.cpp:rt_brep_tess()

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.
  • Time Estimate:
  • References:

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.
  • Time Estimate:
  • References:

BREP/NURBS CSG evaluation

Implement boolean evaluation of BREP/NURBS surfaces.

  • Benefit: partial requirement for interactive visualization of BREP/NURBS in OpenGL.
  • Time Estimate:
  • References:

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.
  • Time Estimate:
  • References:

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.
  • Time Estimate:
  • References:

BREP/NURBS documentation

Document the new BREP/NURBS primitive.

  • Benefit: provides user documentation explaining capabilities, limitations, and benefits.
  • Time Estimate:
  • References:

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).
  • Time Estimate:
  • References:

Cache prep results

Cache BREP/NURBS prep results to a specified cache file.

  • Benefit: faster ray tracing runtime for BREP/NURBS, user requested.
  • Time Estimate:
  • References:

BREP/NURBS wireframe

Improve BREP/NURBS wireframe. Investigate using knots on subcurves.

  • Benefit: faster wireframe, more detailed close wireframes.
  • Time Estimate:
  • References:

BREP/NURBS source code cleanup

Consolidate Owens and Reeves approaches to ray intersection.

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.

  • Benefit:
  • Time Estimate:
  • References:

BREP/NURBS for analysis purpose report

Description needed here.

  • Benefit:
  • Time Estimate:
  • References:

Analytic comparison of BREP/NURBS and BoT

Description needed here.

  • Benefit:
  • Time Estimate:
  • References:

Analytic comparison of BREP/NURBS CSG and implicit CSG

Description needed here.

  • Benefit:
  • Time Estimate:
  • References: