Angle between two lines

Rhino Developer
1

I have need the angle between two lines (negative or positive depends of frist line) and
I use this code to get:

import rhinoscriptsyntax as rs
line1 = rs.GetObject(“LINE1”)
line2 = rs.GetObject(“LINE2”)
line1Start = rs.CurveStartPoint(line1);
line1End = rs.CurveEndPoint(line1);
line2Start = rs.CurveStartPoint(line2);
line2End = rs.CurveEndPoint(line2)
ang1=rs.Angle(line1Start,line1End)
ang2=rs.Angle(line2Start,line2End)
print ang2[0]-ang1[0]

So, rs,angle only return until 0º/180º and -180º /0º, the problem is I have a angle Ex: 170 and other
-170, the return is -340 or 340 , and supose return -20 or 20 depend the frist line:

AnglNot
AnglNot1416×705 34.7 KB

I try convert this on full 360º but this brings another problem, the 0º position can also be 360º, this generates calculation error.

Any idea

2

rs.Angle2 returns both angle and reflex angle:

import rhinoscriptsyntax as rs
line1 = rs.GetObject("First line")
line2 = rs.GetObject("Second line")
angle = rs.Angle2(line1, line2)
print 'Angle = {}'.format(angle[0])
print 'Reflex angle = {}'.format(angle[1])

Maybe I didn’t exactly get what else you need.

3

Thanks for your answer, the Angle2 don’t return negative clock.

1 Like
4 
import rhinoscriptsyntax as rs
line1 = rs.GetObject("First line")
line2 = rs.GetObject("Second line")
start1 = rs.CurveStartPoint(line1)
start2 = rs.CurveStartPoint(line2)
end1 = rs.CurveEndPoint(line1)
angle = rs.Angle2(line1, line2)[0]
print rs.Angle2(line1, line2)[0] * rs.CreatePlane(start1, end1-start1, start2-start1)[3][2]

CounterClockwiseAngle.py (336 Bytes)

5

Thank you @Mahdiyar