angle.js
function angle(a, b) {
    var tempA = fromValues(a[0], a[1], a[2])
    var tempB = fromValues(b[0], b[1], b[2])
 
    normalize(tempA, tempA)
    normalize(tempB, tempB)
 
    var cosine = dot(tempA, tempB)

    if(cosine > 1.0){
        return 0
    } else {
        return Math.acos(cosine)
    }     
}
function angle(a, b) {
    var tempA = fromValues(a[0], a[1], a[2])
    var tempB = fromValues(b[0], b[1], b[2])
 
    normalize(tempA, tempA)
    normalize(tempB, tempB)
 
    var cosine = dot(tempA, tempB)

    if(cosine > 1.0){
        return 0
    } else {
        return Math.acos(cosine)
    }     
}
function angle ( a , b ) { var tempA = fromValues ( a [ 0 ] , a [ 1 ] , a [ 2 ] ) var tempB = fromValues ( b [ 0 ] , b [ 1 ] , b [ 2 ] ) normalize ( tempA , tempA ) normalize ( tempB , tempB ) var cosine = dot ( tempA , tempB ) if ( cosine > 1.0 ) { return 0 } else { return Math . acos ( cosine ) } }
Get the angle between two 3D vectors
@param {vec3} a The first operand
@param {vec3} b The second operand
@returns {Number} The angle in radians
Get the angle between two 3D vectors