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0032995: Modeling algorithms - Interface for checking canonical geometry

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GeomConvert_CurveToAnaCurve, GeomConvert_SurfToAnaSurf - geometrical algorithms
for converting geometrical curve and surfaces in canonical geometry with given tolerance.

ShapeAnalysis_CanonicalRecognition - interface for checking canonical geometry.
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2022-05-15 08:04:58 +03:00
committed by smoskvin
parent 7a52478f16
commit b47b075ac5
42 changed files with 4652 additions and 8 deletions
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dox/user_guides/modeling_data/modeling_data.md
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@@ -338,7 +338,8 @@ The <i>GeomConvert</i> package also provides the following:
* a splitting algorithm, which determines the curves along which a BSpline surface should be cut in order to obtain patches with the same degree of continuity,
* global functions to construct BSpline surfaces created by this splitting algorithm, or by other types of BSpline surface segmentation,
* an algorithm, which converts a BSpline surface into a series of adjacent Bezier surfaces,
* an algorithm, which converts a grid of adjacent Bezier surfaces into a BSpline surface.
* an algorithm, which converts a grid of adjacent Bezier surfaces into a BSpline surface.
* algorithms that converts NURBS, Bezier and other general parametrized curves and surface into anaytical curves and surfaces.
@subsection occt_modat_1_4 Points on Curves

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dox/user_guides/shape_healing/shape_healing.md
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@@ -1007,6 +1007,25 @@ Standard_Integer aNbOffsetSurfaces = aCheckContents.NbOffsetSurf();
Handle(TopTools_HSequenceOfShape) aSeqFaces = aCheckContents.OffsetSurfaceSec();
~~~~
@subsubsection occt_shg_3_2_4 Analysis of shape underlined geometry
Class *ShapeAnalysis_CanonicalRecognition* provides tools that analyze geometry of shape and explore the possibility of converting geometry into a canonical form.
Canonical forms for curves are lines, circles and ellipses.
Canonical forms for surfaces are planar, cylindrical, conical and spherical surfaces.
Recognition and converting into canonical form is performed according to maximal deviation criterium: maximal distance between initial and canonical geometrical objects must be less, than given value.
Analysis of curves is allowed for following shapes:
* edge - algorithm checks 3d curve of edge
* wire - algorithm checks 3d curves of all edges in order to convert them in the same analytical curve
Analysis of surfaces is allowed for following shapes:
* face - algorithm checks surface of face
* shell - algorithm checks surfaces of all faces in order to convert them in the same analytical surface
* edge - algorithm checks all surfaces that are shared by given edge in order convert one of them in analytical surface, which most close to the input sample surface.
* wire - the same as for edge, but algorithm checks all edges of wire in order to find analytical surface, which most close to the input sample surface.
@section occt_shg_4 Upgrading
Upgrading tools are intended for adaptation of shapes for better use by Open CASCADE Technology or for customization to particular needs, i.e. for export to another system.