Complex shapes

[john]

Hi all,

I am a newbie in to OI programms,

Anybody plz explain me what this complex shapes means??
I would like to see the image of face set, indexed face etc

Please help :(

Thanks in Advance
john

[mikeheck]

Anybody plz explain me what this complex shapes means??
I would like to see the image of face set, indexed face etc


Hi John,

That question is very general, so I'm not quite sure where to start! You might get more useful information if you start by briefly describing what your application needs to do and what kind of objects you need to render. Here are some suggestions in any case.

A face set or other "complex" geometry isn't necessarily complex. It just means that the geometry represents an object using a collection of simple faces. The faces could all be triangles (a common case) or a combination of different kinds of polygons. Each face is defined by a set of vertices (3 for a triangle) and each vertex is defined by a coordinate (x,y,z) in 3D space. Both types of face set are given a list of vertices. A face set uses each vertex exactly once and in the order given. This is convenient for simple cases. An indexed face set has an additional list containing integer indices which specify which vertices in the vertex list to use for each face. This avoids duplication when multiple faces share a vertex (as in a surface).

If you just want to see what some of the primitives look like, try running the SceneViewer application included with the Inventor SDK (on Windows there is a pre-build executable you can run from the Start menu). You can load a variety of scenes from the .../data/Models directory. Specifically the "simple" subdirectory contains examples of various geometry types. To see the structure (faces) of a model, right click in the viewer window, then select DrawStyle->Wireframe from the popup menu.

Regards,
Mike

[john]

Hello mikeheck,

I got the perfect reply , and got what i was not clear about.

Thanks for the help and showing me the resources available with the OI

Cheers,
john :)