QuadI1Basis.h

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// Intrepid2
basis[0 * 3 + 0] = 0.5 * (1.0 - ss);
basis[0 * 3 + 1] = 0.0;
basis[0 * 3 + 2] = 0.0;
 
basis[1 * 3 + 0] = 0.0;
basis[1 * 3 + 1] = 0.5 * (1.0 + rr);
basis[1 * 3 + 2] = 0.0;
 
basis[2 * 3 + 0] = -0.5 * (1.0 + ss);
basis[2 * 3 + 1] = 0.0;
basis[2 * 3 + 2] = 0.0;
 
basis[3 * 3 + 0] = 0.0;
basis[3 * 3 + 1] = -0.5 * (1.0 - rr);
basis[3 * 3 + 2] = 0.0;