FindUsingRay giving wrong results on cylindrical faces?

[gilsdorf_e]

Hi there, after not having success with the FindUsingVector method, I tried using FindUsingRay.

First it seemed to work, finding intersections withing a radius of the beam. But there seems to be an issue with cylindrical faces.

If the ray does not cross the cylinder directly (sideways), it will not return any intersections, even though most of the cylinder is inside the radius of 0.5 cm that has been used as input. Only if the ray hits the cylinder directly, this will result in an intersection.

For a box with the same silhouette (boundary box) as the cylinder, it will give an intersection.

Best regards

Erik

[gilsdorf_e]

I found findUsingVector is even acting worse. ProximityTolerance does not seem to have an effect at all.

I have a  flat sheetmetal part with some drilled holes of 3,7mm. When I raster the face into 10mm raster and use findUsingVector it will not return any intersection points when the vector just passes through one of this holes, although ProximityTolerance is set to 0.5 (= 5 mm).

Please help.

[YuhanZhang]

Can you upload your data and code for us to check it?

[gilsdorf_e]

Please view support case 10374949 for the data. Wayne Brill has verified this issue and logged this as Change Request 51377.

Best regards

Erik

[YuhanZhang]

I got it. You can use the FindUsingVector instead, I tested it with same data and it can find the correct objects.

[gilsdorf_e]

Hello,

thank you for your answer. But is FindUsingVector not searching in both directions? FindUsingRay will only search in direction of the ray. That would give me additional hits in an assembly context.

Best regards

Erik

[YuhanZhang]

You are right, the FindUsingVector will search both sides.

[Hochenauer]

Hi Erik,

by "raster", do you mean a rectangular pattern (grid) of points 10mmx10mm where you do your testing from?

Or is this referring to a hole pattern on the cylinder?

Just making sure there is no misunderstanding.

Cheers,

Gerald