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The conversions of implicit primitives to NURBS in BRL-CAD can be seen in functions rt_*_brep() in src/librt/primitives/, and the conversion of each primitive is done in a separate function. The executable file csgbrep.exe can call most of them to produce NURBS represtations of many primitives together for a test. | The conversions of implicit primitives to NURBS in BRL-CAD can be seen in functions rt_*_brep() in src/librt/primitives/, and the conversion of each primitive is done in a separate function. The executable file csgbrep.exe can call most of them to produce NURBS represtations of many primitives together for a test. | ||
− | This work is significantly dependent on the OpenNURBS library as its basic NURBS support. The data structures to describe NURBS is based on OpenNURBS, and OpenNURBS provides many useful algorithms for our work | + | This work is significantly dependent on the OpenNURBS library as its basic NURBS support. The data structures to describe NURBS is based on OpenNURBS, and OpenNURBS provides many useful algorithms for our work. |
Although lots of work has been done in BRL-CAD already, some bugs still exist and some work is still located at the mathematical orgin. It may not work well if the parameters are changed in some occasions. And some primitives are still not included. The robustness need to be improved and the missing ones should be added. | Although lots of work has been done in BRL-CAD already, some bugs still exist and some work is still located at the mathematical orgin. It may not work well if the parameters are changed in some occasions. And some primitives are still not included. The robustness need to be improved and the missing ones should be added. |