Math

trigscript/math is for things that move: a value that follows another, a glide from one place to another that slows at the end, the distance and the angle between two points.

import { Vec, distance, approach, wrap, lerp, easeOutQuad } from "trigscript/math";

program(() => {
  print(`${distance(0, 0, 30, 40)}`);                          // 50
  print(`${approach(10, 50, 15)} ${approach(45, 50, 15)}`);    // 25 50
  print(`${wrap(-1, 10)} ${wrap(12, 10)}`);                    // 9 2
  print(`${lerp(fixed(0), fixed(100), easeOutQuad(fixed(0.5)))}`);   // 75
  const v = new Vec(fixed(3), fixed(4));
  print(`${v.length()} ${v.add(new Vec(fixed(1), fixed(1))).x}`);    // 5 4
});

A location that drifts towards a Marine, eight pixels a frame:

import { approach } from "trigscript/math";

program(async () => {
  let x = 0;
  let y = 0;
  while (true) {
    const m = first({ owner: P1, type: units.TerranMarine });
    if (m) {
      x = approach(x, m.x, 8);
      y = approach(y, m.y, 8);
      centerLocation(locations.Beacon, x, y);
    }
    await nextFrame();
  }
});

Fractions are the language's fixed numbers, about four decimal places from about −32 768 to 32 767 (Numbers with a fraction). Angles are radians, 0 to the right and π / 2 down, since y grows down the map. The functions that can stay whole (approach, wrap, sign, distanceSq, manhattan) do, and cost less.