File: quadm.fe

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// quadm.fe

// quadrilateral boundary wire 
// test of metric 

INTEGRAL_ORDER 7

METRIC
/*
1+4*x1^2  4*x1*x2  2*x1
4*x1*x2  1+4*x2^2  2*x2
2*x1      2*x2      1
*/
1 0 0
0 1 0
0 0 1

constraint 1 
formula: x1 = 0

constraint 2
formula: x1 = 1

constraint 3
formula: x2 = 0

constraint 4
formula: x2 = 1

constraint 5
formula: x1^2 + x2^2 + x3 = 0


vertices
1   0  0  0 fixed
2   1  0 -1 fixed
3   1  1 -2 fixed
4   0  1 -1 fixed

edges
1   1  2 fixed  constraints 3,5
2   2  3 fixed  constraints 2,5
3   3  4 fixed  constraints 4,5
4   4  1 fixed  constraints 1,5
5   2  4

faces
1   1 5 4 
2   2 3 -5


read

// Typical evolution
gogo := {  r; g 12; U; r; g 12; r; g 12; r; g 20; }