Calculate radian angle of line between two points.
Calculates the radian angle of the line connecting two points.
Internally called by smoothArc.
angle(A, B)
A |
Vector of length two indicating the coordinates of the first point. |
B |
Vector of length two indicating the coordinates of the second point. |
A numeric value [0, 2*pi).
Lutz P Breitling <l.breitling@posteo.de>
angle(c(0,0), c( 0,-1)) /pi; angle(c(0,0), c(-1,-1)) /pi; angle(c(0,0), c(-1, 0)) /pi; angle(c(0,0), c(-1, 1)) /pi; angle(c(0,0), c( 0, 1)) /pi; angle(c(0,0), c( 1, 1)) /pi; angle(c(0,0), c( 1, 0)) /pi; angle(c(0,0), c( 1,-1)) /pi;
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