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bos #20087: [CEA 20080] spacing value constraint not taken into account in Body fitting hypothesis construction.

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jfa 2020-10-16 13:41:08 +03:00
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doc/salome/gui/SMESH/input/cartesian_algo.rst
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@ -60,6 +60,8 @@ This dialog allows to define
* You can specify the **Coordinates** of grid nodes. **Insert** button inserts a node at **Step** distance (negative or positive) from the selected node. **Delete** button removes the selected node. Double click on a coordinate in the list enables its edition. **Note** that node coordinates are measured along directions of axes that can differ from the directions of the Global Coordinate System. * You can specify the **Coordinates** of grid nodes. **Insert** button inserts a node at **Step** distance (negative or positive) from the selected node. **Delete** button removes the selected node. Double click on a coordinate in the list enables its edition. **Note** that node coordinates are measured along directions of axes that can differ from the directions of the Global Coordinate System.
* You can define the **Spacing** of a grid as an algebraic formula *f(t)* where *t* is a position along a grid axis normalized at [0.0,1.0]. *f(t)* must be non-negative at 0. <= *t* <= 1. The whole extent of geometry can be divided into ranges with their own spacing formulas to apply; a t varies between 0.0 and 1.0 within each **Range**. **Insert** button divides a selected range into two. **Delete** button adds the selected sub-range to the previous one. Double click on a range in the list enables edition of its right boundary. Double click on a function in the list enables its edition. * You can define the **Spacing** of a grid as an algebraic formula *f(t)* where *t* is a position along a grid axis normalized at [0.0,1.0]. *f(t)* must be non-negative at 0. <= *t* <= 1. The whole extent of geometry can be divided into ranges with their own spacing formulas to apply; a t varies between 0.0 and 1.0 within each **Range**. **Insert** button divides a selected range into two. **Delete** button adds the selected sub-range to the previous one. Double click on a range in the list enables edition of its right boundary. Double click on a function in the list enables its edition.
.. note:: The actual grid spacing can slightly differ from the defined one. This is done for the best fitting of polyhedrons and for a better mesh quality on the interval boundaries. For example, if a constant **Spacing** is defined along an axis, the actual grid will fill the shape's dimension L along this axis with round number of equal cells: Spacing_actual = L / round( L / Spacing_defined ).
* **Fixed Point** group allows defining an exact location of a grid node in the direction defined by spacing. The following cases are possible: * **Fixed Point** group allows defining an exact location of a grid node in the direction defined by spacing. The following cases are possible:
* If all three directions are defined by spacing, there will be a mesh node at the **Fixed Point**. * If all three directions are defined by spacing, there will be a mesh node at the **Fixed Point**.

6
src/SMESH_SWIG/StdMeshersBuilder.py
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@ -1900,6 +1900,12 @@ class StdMeshersBuilder_Cartesian_3D(Mesh_Algorithm):
points dividing the whole shape into ranges where the functions apply; points points dividing the whole shape into ranges where the functions apply; points
coordinates should vary within (0.0, 1.0) range. Parameter *t* of the spacing coordinates should vary within (0.0, 1.0) range. Parameter *t* of the spacing
function f(t) varies from 0.0 to 1.0 within a shape range. function f(t) varies from 0.0 to 1.0 within a shape range.
Note:
The actual grid spacing can slightly differ from the defined one. This is done for the
best fitting of polyhedrons and for a better mesh quality on the interval boundaries.
For example, if a constant **Spacing** is defined along an axis, the actual grid will
fill the shape's dimension L along this axis with round number of equal cells:
Spacing_actual = L / round( L / Spacing_defined ).
Examples: Examples:
"10.5" - defines a grid with a constant spacing "10.5" - defines a grid with a constant spacing