Expand description
Gauss rules as (xi, eta, weight) triples ((t, weight) for the edge
rule). Triangle weights sum to the reference area 1/2, quadrilateral
weights to 4, edge weights to 2.
Constants§
- EDGE_
GAUSS_ 2 - Two-point rule on
[-1, 1]for element edges, exact for degree 3. - QUAD4_
GAUSS_ 2X2 - 2x2 rule on
[-1, 1]^2, exact for degree 3 per axis. Point order is(-,-), (+,-), (+,+), (-,+), matching the quad’s node order. - TRI3_
GAUSS_ 1 - One-point triangle rule (centroid), exact for degree 1.
- TRI3_
GAUSS_ 3 - Three-point triangle rule (interior points), exact for degree 2.