vle-vector-angleto


(vle-vector-angleto  vec1  vec2)

This function returns the angle between vectors vec1 and vec2.

Arguments

vec1  a 2d or 3d vector list

vec2  a 2d or 3d vector list

Return

double, angle in radians, in range 0 ... PI

Example

(setq v1 '(2 0 0) v2 '(0 3 0))
(vle-vector-angleto v1 v2)
1.5707963267949

(setq v1 '(2 0 0) v2 '(-1 -1 0))
(vle-vector-angleto v1 v2)
2.35619449019234

Remarks

input vectors must not be unit-length (non-normalised vectors are allowed)


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