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Show 3D model

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Show 3D model

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A function to simplify plotting 3D models.

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Description

Models composed of triangle meshes are commonly used in art, engineering, and medical CAD for representing 3D objects. These models consist of a series of triangles in 3D space, sometimes also including colors. Plotting them is not difficult, but it is tedious because the structures are composed of faces (triangles) are defined as indices into vertices (3D points). I wrote the function 'show_model' as a simple plot tool analogous to 'plot'. It can handle variable arguments in to specify transparency, face color, and line style. It returns a handle to the patch object that is created.

Usage:
   h = show_model(model,varargin)

Example (with 2d triangles):
   model.v = [2 4; ... % x-y coords
        2 8; ...
        8 4; ...
        8 0; ...
        0 4; ...
        2 6; ...
        2 2; ...
        4 2; ...
        4 0; ...
        5 2; ...
        5 0 ];
   % order in which vertices are joined to form triangles
   model.f = [1 2 3; ...
         1 3 4; ...
         5 6 1; ...
         7 8 9; ...
         11 10 4];
   model.c=[zeros(size(model.v,1),3)];
   show_model(model)

Acknowledgements

Binary Stl File Reader and Patch Slim (Patchslim.M) inspired this file.

This file inspired Generate U3 D Files From Stl Models For Making Multilayer 3 D Pdf Figures.

MATLAB release MATLAB 7.9 (R2009b)
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