@chrisheninger/saxi/dist/server/vec.js

Drive the AxiDraw pen plotter

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function vlen2(a) {
    return a.x * a.x + a.y * a.y;
}
exports.vlen2 = vlen2;
function vlen(a) {
    return Math.sqrt(vlen2(a));
}
exports.vlen = vlen;
function vsub(a, b) {
    return { x: a.x - b.x, y: a.y - b.y };
}
exports.vsub = vsub;
function vmul(a, s) {
    return { x: a.x * s, y: a.y * s };
}
exports.vmul = vmul;
function vnorm(a) {
    return vmul(a, 1 / vlen(a));
}
exports.vnorm = vnorm;
function vadd(a, b) {
    return { x: a.x + b.x, y: a.y + b.y };
}
exports.vadd = vadd;
function vdot(a, b) {
    return a.x * b.x + a.y * b.y;
}
exports.vdot = vdot;
function vrot(v, c, a) {
    if (a === 0)
        return v;
    let radians = (Math.PI / 180) * a, cos = Math.cos(radians), sin = Math.sin(radians), nx = cos * (v.x - c.x) - sin * (v.y - c.y) + c.x, ny = cos * (v.y - c.y) + sin * (v.x - c.x) + c.y;
    return { x: nx, y: ny };
}
exports.vrot = vrot;
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