vectorCos

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Description

Description:
Cosine of angle between two 3D vectors.
Groups:
Math - Vectors

Syntax

Syntax:
vector1 vectorCos vector2
Parameters:
vector1: Array - vector 3D or 2D (since Arma 3 v2.00, the z coordinate is defaulted to 0)
vector2: Array - vector 3D or 2D (since Arma 3 v2.00, the z coordinate is defaulted to 0)
Return Value:
Number

Examples

Example 1:
_cos = getPos player vectorCos [0,0,2];

Additional Information

See also:
vectorAdd vectorDiff vectorCrossProduct vectorDotProduct vectorMagnitude vectorMagnitudeSqr vectorMultiply vectorDistance vectorDistanceSqr vectorDir vectorUp setVectorDir setVectorUp setVectorDirAndUp vectorNormalized vectorFromTo matrixMultiply matrixTranspose

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Posted on 28 Jun, 2014
ffur2007slx2_5
Arma 3 logo black.png1.22 Algorithm:
Vector1 = [x1,y1,z1]; Vector2 = [x2,y2,z2]; Result = ((x1 * x2) + (y1 * y2) + (z1 * z2))/((sqrt (x1 ^ 2 + y1 ^ 2 + z1 ^ 2))*(sqrt (x2 ^ 2 + y2 ^ 2 + z2 ^ 2)));
Given two vectors of attributes, A and B, the cosine similarity, cos(θ), is represented using a dot product and magnitude. The resulting similarity values indicating intermediate similarity or dissimilarity between two vectors.