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add vector angle

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John Alanbrook 2024-06-25 17:53:15 -05:00
parent 7e851756de
commit b5e655e1f2
1 changed files with 11 additions and 1 deletions
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12
scripts/base.js
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@ -1493,7 +1493,17 @@ Vector.random = function() {
var vec = [Math.random()-0.5, Math.random()-0.5];
return Vector.norm(vec);
}
Vector.angle_between = function(a,b)
{
var dot = Vector.dot(a,b);
var am = Vector.length(a);
var bm = Vector.length(b);
var cos_a = dot / (am*bm);
var angle = Math.acos(cos_a);
return Math.rad2turn(angle);
}
Vector.angle = function(v) { return Math.rad2turn(Math.atan2(v.y, v.x)); }
Vector.rotate = function(v,angle) {
var r = Vector.length(v);