Vector length, dot product, distance, angle - Node.js Data Structure

Node.js examples for Data Structure:Vector

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Description

Vector length, dot product, distance, angle

Demo Code

function vecLength(x,y){
    return Math.sqrt(x*x + y*y);
}

function vecDot(x1,y1, x2,y2){
    return x1*x2+y1*y2;
}

function vecDist(x1,y1, x2,y2){
    return Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
}

function vecAngle(x1,y1, x2,y2){
    return Math.acos(vecDot(x1,y1, x2,y2)/((vecLength(x1,y1)*vecLength(x2,y2)))+EPSILON);
}

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