vectorCos

1.22

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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

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Posted on 28 Jun, 2014

ffur2007slx2_5

1.22 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.