Triangle geometry data.
Synopsis
[ar,a1,a2,a3]=pdetrg(p,t)
[ar,g1x,g1y,g2x,g2y,g3x,g3y]=pdetrg(p,t)
Description
[ar,a1,a2,a3]=pdetrg(p,t)
returns the area of each triangle in ar and half of the negative cotangent of each angle in a1, a2, and a3.
[ar,g1x,g1y,g2x,g2y,g3x,g3y]=pdetrg(p,t)
returns the area and the gradient components of the triangle base functions.
The triangular mesh of the PDE problem is given by the mesh data p and t. Details on the mesh data representation can be found in the entry on initmesh.
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