@tolokoban/tgd
Version:
ToloGameDev library for WebGL2
23 lines • 1.95 kB
JavaScript
export function subtract(a, b) {
const [xa, ya, za] = a;
const [xb, yb, zb] = b;
return [xa - xb, ya - yb, za - zb];
}
export function dot(a, b) {
const [xa, ya, za] = a;
const [xb, yb, zb] = b;
return xa * xb + ya * yb + za * zb;
}
export function dot2(a) {
return dot(a, a);
}
export function scale(a, f) {
const [x, y, z] = a;
return [x * f, y * f, z * f];
}
export function sign(v) {
if (v === 0)
return 0;
return v < 0 ? -1 : +1;
}
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