Dear GMSH community,
I am currently struggling with Spline/BSpline surfaces.
I am trying to define a surface that is defined by splines over both axes. For
an example, see below.
When I only divide the surface into three adjacent strips, I loose the smooth
curves in the perpendicular direction. Subdiving the surface in nine equal
patches is also not an option, because this will yield linear splines between
the defined points, rather than the smooth curves over the domain.
Is this at all possible via a GEO file and if so, how?
Ideally it would be using NURBS surfaces, but I understand that this is
currently only supported for imported STEP files and the like.
You help would be greatly appreciated!
Best regards,
Roy Bijster
Structural Optimization and Mechanics
Precision and Microsystems Engineering
Faculty Mechanical, Maritime and Materials Engineering
Delft University of Technology
// ---- GEO FILE --------------------------------------------
Point(1) = {0, 0, 0}; Point(2) = {1, 0, 0}; Point(3) = {2, 0, 0}; Point(4) =
{3, 0, 0};
Point(5) = {0, 1, 0}; Point(6) = {1, 1, 2}; Point(7) = {2, 1, -1}; Point(8) =
{3, 1, 0};
Point(9) = {0, 2, 0}; Point(10) = {1, 2, -0.5}; Point(11) = {2, 2, 1};
Point(12) = {3, 2, 0};
Point(13) = {0, 3, 0}; Point(14) = {1, 3, 0}; Point(15) = {2, 3, 0}; Point(16)
= {3, 3, 0};
Spline(1) = {1, 2, 3, 4};
Spline(2) = {5, 6, 7, 8};
Spline(3) = {9, 10, 11, 12};
Spline(4) = {13, 14, 15, 16};
Spline(5) = {1, 5, 9, 13};
Spline(6) = {2, 6, 10, 14};
Spline(7) = {3, 7, 11, 15};
Spline(8) = {4, 8, 12, 16};
// ---- END OF GEO FILE --------------------------------------------
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