getTriArea may return -nan

[Raven1996]

Hello, I‘ve tried obj2pcd on ShapeNetSem and found a problem.
The "getTriArea" function returned -nan only on one face among the 12k models.
The model ID is wss.dba37de1080c048f4f32009f59473bea.
I think this problem is due to the double precision.
In sampler.h line 58, it is necessary to check the sign before applying sqrt.

[jiangwei221]

Hi,
Thank you for using the software, and the feedback!
I just downloaded the models-OBJ.zip from ShapeNetSem website. But I cannot locate the obj file. Could you provide the file name of that obj file?

[jiangwei221]

I see, it happened when 3 points of a triangle lies on the same line, which caused the area of the triangle become 0.

[Raven1996]

I see, it happened when 3 points of a triangle lies on the same line, which caused the area of the triangle become 0.

Sorry for the late reply. That's what I mean. The area is too tiny so that float number may be negative.