Forums Technical Discussion Why my point warngle intersection doesn't works?

Why my point warngle intersection doesn't works?

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Masoud
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Hi guys;
I would like to find the intersection point on a surface, using point wrangle.

vector NewPointUV, DirPoint;

DirPoint = point(2, "P", 0);
i@hit = intersect(1, @P, DirPoint, v@NewPointLoc, NewPointUV);
@P = @NewPointLoc;

But it doesn't work. Any idea?

Thanks.
Edited by Masoud - 2017年10月20日 01:58:55

Attachments:
intersection.JPG (18.3 KB)

Masoud Saadatmand (MSDVFX)
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vusta
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here's my idea….upload file…
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Solitude
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I think you need a direction vector, not a position…

i@hit = intersect(1, @P, DirPoint-@P, v@NewPointLoc, NewPointUV);

I may the direction backwards – try @P-DirPoint if that doesn't work.
Ian Farnsworth
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tamte
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that and also be aware that the direction vector's length is used as maximum distance, so if there is no intersection found within that distance, it will not hit
Tomas Slancik
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Len
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I've been toying with line intersections a lot lately and I would recommend debugging the values coming out of the intersect (or intersect_all) functions by printing or setting detail attributes and making sure they look good. You may be getting intersections you don't expect that are throwing off your results.
You may also need to try intersect_all and tweak the optional tolerance values.
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