Hot answers tagged models
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The industry standards for 3D modeling are tools such as Maya, 3D Studio Max, Softimage, Modo 601, Zbrush(sculpting), and Blender. Blender is free, while all of the others are quite expensive. Blender is not only a modeling, but animating and rendering suite with a programmable framework. It is a very good place to start, and has a great community. If you ...
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The problem with the obj format is that it isn't standardised. So you'll see some that use clockwise winding (not good for a naive implementation in OpenGL) some that use counter-clockwise winding (not good for a naive implementation in DirectX) plus all other kinds of quirks that are vendor-dependent (eg. triangles vs quads as primitives).
The most usual ...
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There is a good documentation on Wikipedia. The format is made by Wavefront, you'll find lot more information online with this name. This is the Wikipedia article.
Basically, v means vertex position, vt means texture coordinate and vn means vertex normal. f defines indices of a face.
It isn't that easy to draw *.obj models in a modern way, since their ...
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If you open the object in a proper polygonal editor, you can extrude faces by a negative amount to turn it hollow. The main idea is to have a smaller copy sitting inside the larger and have all faces reversed. You could even do it by hand, though that is impractically tedious.
You can try Blender, Cheetah3D, Hexagon, Wings3D, Silo, Nvil, 3ds Max, or Maya.
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