yogy

一个关于OCC和open inventor的比较

OpenInventor has more few class than OpenCascade, and more closer to the openGL,(if you see the implementation of it), the data structure of OpenInventor is more simple than OCC. Thus, on the data structure level, OIV should more faster than OCC.
I make some program use OIV, the visualization of it is more quickly, the interactive process such as changing the parameter of geometries and then redisplay it is so quickly.
The OIV has some optimization in its structure using openGL's displaylist technology(it called cach), but it didn't provide the trangulization of the shape.