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| ** The current method for partitioning a trimmed surface is not elegant and convenient. Looked for some materials online and found some valuable resources. | | ** The current method for partitioning a trimmed surface is not elegant and convenient. Looked for some materials online and found some valuable resources. |
| ** Used a new method for partitioning a surface. Followed the algorithms described in: S. Krishnan, A. Narkhede, and D. Manocha. BOOLE: A System to Compute Boolean Combinations of Sculptured Solids. Technical Report TR95-008. Department of Computer Science, University of North Carolina, 1995. Appendix B: Partitioning a Simple Polygon using Non-Intersecting Chains. | | ** Used a new method for partitioning a surface. Followed the algorithms described in: S. Krishnan, A. Narkhede, and D. Manocha. BOOLE: A System to Compute Boolean Combinations of Sculptured Solids. Technical Report TR95-008. Department of Computer Science, University of North Carolina, 1995. Appendix B: Partitioning a Simple Polygon using Non-Intersecting Chains. |
− | * Aug 8
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− | ** Finished a draft of partitioning a surface. Modifications for special cases and tests are needed.
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− | ** Before starting to write code dealing with inside-outside tests, which is the final step to evaluated NURBS, the current routine of partitioning should be finished beforehand. But it's still a long way to go. I hope I can have good luck with it.
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− | * Aug 9
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− | ** Added an option to the brep command in MGED to test boolean evaluations (currently only "union").
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− | ** The evaluation processes are still WIP. The final b-rep structure cannot pass IsValid() at present because edges and vertices are not added. Besides, lots of other modifications are needed.
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− | * Aug 10
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− | ** Added trims, vertices, edges, etc. to the b-rep structure and checked its validity.
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− | == Week 13 ==
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− | * Aug 13
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− | ** Continued working on adding elements to the ON_Brep structure, trying to make IsValid() succeed. Did some clean up and fixed some bugs, and make the common parts into a separate function.
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− | ** Today is the suggested "pencils down" date. As for the project of evaluating NURBS objects, I think I do not have enough time left to finish it all. At present, faces can be partitioned into several trimmed faces, but some conditions are not considered and problems may still exist. As for the week left, I'd like to go back to the code I wrote all these months, do some clean up, add necessary documents, etc.
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− | * Aug 14
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− | ** Modified add_elements() and tried using the ON_Surface::Pushup() method first.
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− | ** Some clean up on dsp_brep.cpp: modified comments, renamed a variable with typo, eliminated the debug output, and reduced using dynamic allocated pointers.
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− | ** Added comment before surface_surface_intersection() to describe the algorithm used in SSI.
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− | * Aug 15
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− | ** Modified cline_brep.cpp, ehy_brep.cpp, epa_brep.cpp, eto_brep.cpp and extrude_brep.cpp and eliminated the memory leak.
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− | * Aug 16
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− | ** Modified hyp_brep.cpp, part_brep.cpp, pipe_brep.cpp, revolve_brep.cpp, rhc_brep.cpp, rpc_brep.cpp, sketch_brep.cpp and tgc_brep.cpp and eliminated the memory leak.
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− | ** Did some clean up and added comments to /libged/brep.c.
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− | * Aug 17
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− | ** Add documentation of the brep command in MGED to the wiki page. See: [[http://brlcad.org/wiki/MGED_CMD_brep]]
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− | == Final summary ==
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− | * The "Implicit to NURBS conversion" project was mainly done before mid-term evaluation. The milestones and previous goals in the original proposal are finished.
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− | * After mid-term, I focused on the "NURBS Intersection" project, and add many useful features to BRL-CAD, such as calculating surface-surface intersection curves (both in 3d space and 2d UV space), splitting surface and generating new trimmed surfaces, etc.
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| = Test Results = | | = Test Results = |