1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
// A utility library for vector (coordinate) operations.
exports.mult = function(vec, scal){
for (let i = 0; i < vec.length; i++)
vec[i] = scal*vec[i];
return vec;
}
function elem(orig, vec, op){
let comb = [];
for (let i = 0; i < orig.length; i++){
comb.push(op(vec[i],orig[i]));
}
return comb;
}
exports.elem = elem;
exports.add = function(orig, vec){
return elem(orig, vec, (a,b) => a+b);
}
exports.sub = function(orig, vec){
return elem(orig, vec, (a,b) => a-b);
}
exports.dot = function(orig,vec){
return elem(orig, vec, (a,b) => a*b);
}
|
