geompy.KindOfShape() wrong information? bug?

1

hello,

I am following the description in SALOME Geometry User's Guide: Auxiliary data structures and methods of kindOfShape().

when we look at the CYLINDER2D the output is: [xb yb zb dx dy dz R H]
nevertheless, when I do the following script:

compound = geompy.MakeDividedCylinder(100,  300,  GEOM.SQUARE)
faces=    geompy.SubShapeAll(compound,  geompy.ShapeType["FACE"])
facesKind=    [geompy.KindOfShape(face) for face in faces]

for the cylindrical faces I am getting:

[CYLINDER2D, 0.0, 0.0, 0.0, -0.0, -0.0, -1.0, 100.0, 300.0]

my issue is with the dx,dy,dz, which is negative, I wanted to re create the cylindrical face by creating a cylinder from 2 points and its directive vector, so,
t,x0,y0,z0,dx,dy,dz,R,H=[CYLINDER2D, 0.0, 0.0, 0.0, -0.0, -0.0, -1.0, 100.0, 300.0]

if I want to calculate the x1,y1,z1 (second point) I am doing:

x1,y1,z1= x0+dx*H, y0+dy*H, z0+dz*H

but if I follow this, the z1 will be in the -300, instead of the 300. I am not sure that this can help but I see that in the dx,dy,dz I have -0.0 instead of 0.0 but as -0.0==0.0.

is this a bug? and error? is it intentional?

2

over other geometries i have tested (imported via step import on geometry) this does not happens, but for the divided cylinder created directly from geom, it is an issue (the direction of the director vector)

3

I can confirm that geompy.KindOfShape() is at least buggy with cylindrical faces.
one example is the previous mentionned with the divided cylinder produced by salome itself, but here is another example face_187.brep

faces_187.brep.tar.gz (1,2 KB)

where the point indicating in the what is? (ie., same output with some roundings to the geompy.KindOfShape()) shows a p0 which is not in the locations of the face itself, but outside:

image
image1208×847 171 KB

I will create an issue in the git geom itself.