The geometric transformation must be used when you are building a custom mesh convex by convex (see the add_convex() function of mesh): it also defines the kind of convex (triangle, hexahedron, prism, etc..)
GT = gf_geotrans(string name)
General constructor for geotrans objects.
The geometric transformation must be used when you are building a custom mesh convex by convex (see the add_convex() function of mesh): it also defines the kind of convex (triangle, hexahedron, prism, etc..)
GT = gf_geotrans(string name)
The name argument contains the specification of the geometric transformation
as a string, which may be:
  - GT_PK(n,k) :
    Transformation on simplexes, dim n, degree k.
  - GT_QK(n,k) :
    Transformation on parallelepipeds, dim n, degree k.
  - GT_PRISM(n,k) :
    Transformation on prisms, dim n, degree k.
  - GT_PRODUCT(A,B) :
    Tensorial product of two transformations.
  - GT_LINEAR_PRODUCT(geotrans gt1,geotrans gt2) :
    Linear tensorial product of two transformations
Y. Collette