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24 Jul 2012 (Updated )

Calculates the affine transformations for integration in 2D/3D via the unit triangle/tetrahedron.

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Calculates the affine transformations needed for integration in 2D/3D via the unit reference triangle/tetrahedron. In 2D the function takes as its input the matrices p,e,t given by initmesh/poimesh (PDEtool toolbox), and calculates the affine transformations for each triangle simultaneously. In 3D we use Tetgen meshes.
I have been using this with all my FEM codes.

With a 2009 MacBook Pro laptop, calculating the affine transformations for a mesh of 2 million triangles takes about 1.2 seconds.


Inttet and Read Tetgenmesh inspired this file.

Required Products Partial Differential Equation Toolbox
MATLAB release MATLAB 7.14 (R2012a)
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24 Jul 2012

The same in 3D too.

25 Mar 2014

Added a function giving 2d integration quadratures.

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