Hi guys,
i have a small question. The cheapest way to check if a point is in the circle is checking the distance from its center to point but when i try to check this straightforward like:
if (cCenter.DistanceTo(pt) < radius)
I get unpredictable results so i assume i have to deal with some doc tolerance or sth? I’d like to maintain points which are on the edge.
@DavidRutten i see you’re around now would you mind give a tip on this?
Hi D-W,
Can you provide an example file and/or code so we can reproduce the unpredictable results.
-Willem
I thought it will be sth like radius - double.Epsilon but while inspecting list i found this what i thought will be Epsilon is ~0.0005
I don’t know from where this value comes in this case. Any ideas?
@Willem In example files you should get 6 true values - i get only one
cir_cont.gh (5.8 KB)
cir_cont.3dm (86.8 KB)
I do get 6 True values:
I have no clue why it would be different at your system
What version are you running?
I run: Rhino 6 SR3 2018-3-19 (Rhino 6, 6.3.18078.21401
@Willem thats interesting i found that out that in different file i get also 6 values… but one moment - take a look in the different file where i got few objects around. I’m running this on v5 sr14.
white line is constructed if point is not in circle and i had to do if (cCenter.DistanceTo(pt) < radius - 0.0005)
red circles are indicating the original case where if (cCenter.DistanceTo(pt) < radius) so as you see I’m missing quite a few circles here…
@Willem now for some reason (wtf???) i get only 5 true values on list
@Willem and to be clear v6 have the same issue here
@Willem also in v6 i have now only 5 bool values
@dale how on the earth if statement of this kind can be file dependant?
Here is example of contains method with high cost so the if looks like:
if ( circle.Contains(pt) == PointContainment.Inside)
Case when using cheap if looks like that:
if (cCenter.DistanceTo(pt) < radius)
wondering if it should not be a smaller or equal to radius? now you just have smaller
-Willem
Less or equal should be if i would like to test if a point is in and on a circle i want only check if it is in.
I tried:
A.DistanceTo(B)
(B-A).Length
2D standard Euclidean distance
with
clean: radius or radius - double.Epsilon
All things are giving the same unpredictable result. @pascal @dale @DavidEranen
