$$$$ INTE NOTICE BP208322 12/09/20 21:15:07 7512 DATE 12/09/20 Operateur INTERSECTION Voir aussi: ---------------------- Description : ____________ ------------------------------------------------------------------ | 1st possibility : intersection of elements of two meshes | ------------------------------------------------------------------ MELE3 = MELE1 'INTER' MELE2 ('NOVERIF') The INTERSECTION operator constructs the intersection of two meshes, i.e. all the elements that pertain to both meshes. Contents : __________ MELE1 | : input meshes MELE2 | MELE3 : mesh composed of the elements that pertain to the two initial meshes 'NOVERIF' : key-word indicating not to produce an error if the intersection is empty. If 'NOVERIF' is specified, produces an empty mesh instead. ------------------------------------------------------------------ | 2nd possibility : intersection of two analytical surfaces | ------------------------------------------------------------------ LIG1 = POIN1 INTER (N1) ('DINI' DENS1 ) ('DFIN' DENS2 ) ('LONG' DLONG)... ... |'PLAN' P1 | |'PLAN' P2 | POIN2 |'SPHE' CENTR1 | |'SPHE' CENTR2 | |'CYLI' AXEI1 AXEJ1 | |'CYLI' AXEI2 AXEJ2 | |'CONI' SOMM1 P1 | |'CONI' SOMM2 P2 | |'TORI' CENTR1 P1 PC1 | |'TORI' CENTR2 P2 PC2 | The INTERSECTION operator constructs the arc of curve, at the intersection of two surfaces, between two points POIN1 and POIN2. Contents : __________ POIN1 | : extreme points of the generated arc of curve POIN2 | (POINT type) N1 : number of generated segments (ENTIER type) DENSi : densities associated with the arc extreme points (FLOTTANT type). the key word 'DINI' enables the definition of the first point density and 'DFIN' that of the last point density. DLONG : arc length. the key word 'LONG' makes it possible to impose the arc length. In that case, a newly created final extreme point is calculated from POIN2 and LONG. The surfaces can be plane, spherical, cylindrical, conical or toric, depending on the key word : 'PLAN' : plane surface passing through Pi (POINT type) 'SPHE' : spherical surface of centre CENTRi (POINT type) 'CYLI' : cylindrical surface of axis AXEIi AXEJi (POINT type) 'CONI' : conical surface of apex SOMMi (POINT type) passing through Pi (POINT type) 'TORI' : toric surface of centre CENTRi (POINT type), of axis CENTR Pi (POINT type); PCi is the centre of a small circle. Note : ________ If N1 is not specified, the arc of curve is divided in relation to the densities defined at the points POIN1 and POIN2. If the densities associated with the points POIN1 and POIN2 are inccurate, they may be increased. The accurate value of the first point will be mentioned after the 'DINI' key word, that of the second point will be mentioned after the 'DFIN' key word. If a LIG1 line is given instead of the POIN1 point (or POIN2), this line will be extended as far as the POIN2 point (the line begins at the POIN1 point). If the POIN2 point is not given, the first extreme point of the LIG1 line will be taken into account, which permits to close this line. ------------------------------------------------------------------ | 3rd possibility : geometrical intersection of two meshes | ------------------------------------------------------------------ MELE1b MELE2b MELE3 MELE4 = 'INTER' 'GEOM' MELE1 MELE2 The INTERSECTION operator constructs the geometrical intersection of two meshes. For example, the intersection of a sphere and a plane is a circle . This option is today limited to the case of 3D non-coplanr surface constituted of 3-nodes triangles. Commentaire : _____________ MELE1 | : input meshes MELE2 | MELE1b : meshe obtained from MELE1 by cutting elements which are crossed by the MELE2 MELE3 : mesh describing the geometric intersection with nodes belonging to MESH1b MELE2b et MELE4 : similar to MELE1b and MELE3 with different nodes
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