#include <occtl_surfaces.h>
Public Attributes | |
| uint32_t | struct_version |
| const void * | p_next |
| int32_t | u_degree |
| int32_t | v_degree |
| int32_t | is_rational |
| int32_t | is_u_periodic |
| int32_t | is_v_periodic |
| size_t | u_pole_count |
| size_t | v_pole_count |
| size_t | u_knot_count |
| size_t | v_knot_count |
| size_t | u_flat_knot_count |
| size_t | v_flat_knot_count |
| const occtl_point3_t * | poles |
| const double * | weights |
| const double * | u_knots |
| const double * | v_knots |
| const int32_t * | u_multiplicities |
| const int32_t * | v_multiplicities |
| const double * | u_flat_knots |
| const double * | v_flat_knots |
Detailed Description
Aggregate inspection view of a B-spline surface.
Read-only snapshot of every field a caller typically needs in the same pass: scalars (U/V degree, periodicity, rational flag, per-direction counts) plus borrowed pointers into the underlying OCCT storage for the pole grid, weight grid, distinct U/V knots, U/V multiplicities, and the expanded U/V flat knot sequences. One call replaces ~16 atomized accessors; pair with occtl_surface_as_bspline.
Pointers in out borrow from the surface rep and are valid while the rep exists in the graph.
The pole and weight grids are stored row-major with U as the major (slow-varying) axis: element (u_index, v_index) is at poles[u_index * v_pole_count + v_index]. This layout matches occtl_surface_bspline_create_info_t so values flow round-trip without reshuffling.
The caller declares the layout version they understand in struct_version before the call; the library fills only fields up to that version. The weights pointer is set to NULL when is_rational is 0.
Member Data Documentation
◆ is_rational
| int32_t occtl_surface_bspline::is_rational |
0 = non-rational; 1 = rational (NURBS) in U or V.
◆ is_u_periodic
| int32_t occtl_surface_bspline::is_u_periodic |
0/1.
◆ is_v_periodic
| int32_t occtl_surface_bspline::is_v_periodic |
0/1.
◆ p_next
| const void* occtl_surface_bspline::p_next |
Reserved for extensions; must be NULL.
◆ poles
| const occtl_point3_t* occtl_surface_bspline::poles |
Borrowed view pointers. Lifetime is tied to the parent surface rep and ends when the parent surface is removed from the graph or mutated. [out] Borrows it; row-major: index = u * v_pole_count + v; u_pole_count * v_pole_count elements.
◆ struct_version
| uint32_t occtl_surface_bspline::struct_version |
[in] Must be OCCTL_SURFACE_BSPLINE_VERSION_1.
◆ u_degree
| int32_t occtl_surface_bspline::u_degree |
Polynomial degree along U.
◆ u_flat_knot_count
| size_t occtl_surface_bspline::u_flat_knot_count |
Sum of U multiplicities (length of u_flat_knots).
◆ u_flat_knots
| const double* occtl_surface_bspline::u_flat_knots |
[out] Borrows it; u_flat_knot_count elements.
◆ u_knot_count
| size_t occtl_surface_bspline::u_knot_count |
Number of distinct U knot values.
◆ u_knots
| const double* occtl_surface_bspline::u_knots |
[out] Borrows it; u_knot_count distinct knots.
◆ u_multiplicities
| const int32_t* occtl_surface_bspline::u_multiplicities |
[out] Borrows it; u_knot_count multiplicities.
◆ u_pole_count
| size_t occtl_surface_bspline::u_pole_count |
Number of poles along U.
◆ v_degree
| int32_t occtl_surface_bspline::v_degree |
Polynomial degree along V.
◆ v_flat_knot_count
| size_t occtl_surface_bspline::v_flat_knot_count |
Sum of V multiplicities (length of v_flat_knots).
◆ v_flat_knots
| const double* occtl_surface_bspline::v_flat_knots |
[out] Borrows it; v_flat_knot_count elements.
◆ v_knot_count
| size_t occtl_surface_bspline::v_knot_count |
Number of distinct V knot values.
◆ v_knots
| const double* occtl_surface_bspline::v_knots |
[out] Borrows it; v_knot_count distinct knots.
◆ v_multiplicities
| const int32_t* occtl_surface_bspline::v_multiplicities |
[out] Borrows it; v_knot_count multiplicities.
◆ v_pole_count
| size_t occtl_surface_bspline::v_pole_count |
Number of poles along V.
◆ weights
| const double* occtl_surface_bspline::weights |
[out] Borrows it; same row-major layout as poles, or NULL when is_rational == 0.
The documentation for this struct was generated from the following file:
- include/occtl/occtl_surfaces.h
