NURBS TODO
[edit] 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.*
[edit] Optimize BREP/NURBS prep
- Benefit: faster ray tracing runtime, user requested, user visible
- Time Estimate: 2 days
- References:
- src/librt/primitives/brep/brep.cpp:rt_brep_prep()
- src/librt/opennurbs_ext.*
[edit] 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
[edit] BREP/NURBS-to-NMG
Implement conversion of BREP/NURBS to NMG.
- Benefit: requirement for polygonal export, partial requirement for OpenGL visualization, user visible
- Time Estimate: 1 day
- References:
- src/librt/primitives/brep/brep.cpp:rt_brep_tess()
[edit] 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: <1 day
- References:
- src/librt/primitives/bspline/*
[edit] 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: 2 days
- References:
- src/librt/primitives/bspline/*
- src/librt/primitives/brep/*
[edit] BREP/NURBS CSG evaluation
Implement boolean evaluation of BREP/NURBS surfaces.
- Benefit: partial requirement for interactive visualization of BREP/NURBS in OpenGL.
- Time Estimate: 7 days
- References:
[edit] 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, user visible
- Time Estimate: 2 days
- References:
- include/rtgeom.h
- src/librt/primitives/bot/bot.c
[edit] 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: < 1 day
- References:
[edit] BREP/NURBS documentation
Document the new BREP/NURBS primitive (user overviewdocumentation: how to import, use, export, limitations).
- Benefit: provides user documentation explaining capabilities, limitations, and benefits; user visible
- Time Estimate: 3 days
- References:
[edit] 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: 1 day
- References:
- include/raytrace.h
- include/db5.h
- src/librt/binunif
- src/librt/primitives/*
[edit] Raytrace prep cache optimization
Cache BREP/NURBS prep results to a specified cache file.
- Benefit: faster ray tracing runtime for BREP/NURBS, user requested, user visible
- Time Estimate: 2 days
- References:
- src/librt/primitives/table.c
[edit] BREP/NURBS wireframe
Improve BREP/NURBS wireframe. Investigate using knots on subcurves.
- Benefit: faster wireframe; LOD wireframes: more detailed close-up wireframes, less detailed far-away wireframes (LOD); user visible
- Time Estimate: 2 days
- References:
[edit] BREP/NURBS source code cleanup
Consolidate Owens and Reeves approaches to ray intersection.
- Benefit: improved code maintainability, complexity reduction
- Time Estimate: 2 days
- References:
[edit] 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: more robust evaluation for improved (more stable & consistent) raytracing, import, export; routine interface later applicable to NMG/BoT too
- Time Estimate: 3 days
- References:
- src/librt/primitives/brep
[edit] Report on using BREP/NURBS for analysis
Description needed here.
- Benefit: documentation, user visible
- Time Estimate: 3 days
- References:
[edit] Analytic comparison of BREP/NURBS and BoT
Description needed here.
- Benefit:
- Time Estimate: 1 day
- References:
- sh/*.sh
- regress/*.sh
- bench/run.sh
[edit] Analytic comparison of BREP/NURBS CSG and implicit CSG
Description needed here.
- Benefit:
- Time Estimate: 2 days
- References:
- sh/*.sh
- regress/*.sh
- bench/run.sh