triar

PURPOSE

row-vector of triangle areas from pdetrg

SYNOPSIS

function ar=triar(p,t)

DESCRIPTION

 row-vector of triangle areas from pdetrg

CROSS-REFERENCE INFORMATION

This function calls:

This function is called by:

SOURCE CODE

0001 function ar=triar(p,t) 
0002 % row-vector of triangle areas from pdetrg
0003 a1=t(1,:);a2=t(2,:);a3=t(3,:);% Corner point indices
0004 % Triangle sides
0005 r23x=p(1,a3)-p(1,a2);r23y=p(2,a3)-p(2,a2);r31x=p(1,a1)-p(1,a3);
0006 r31y=p(2,a1)-p(2,a3);
0007 ar=abs(r31x.*r23y-r31y.*r23x)/2;% areas of tiangles
0008 end