62 lines
1.2 KiB
TypeScript
62 lines
1.2 KiB
TypeScript
import { cls, print, spr, use_texture } from "./graphics";
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import { load_texture } from "./assets";
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import { since_start } from "./time";
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import { btn, Button } from "./input";
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import { new_v2, vadd, vmul, vnorm } from "./vector";
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let bot_sprite: number | undefined = undefined;
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export function init() {
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print("Hello world!");
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// Start this load, but then...
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load_texture("./bot.png").then((n) => {
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print("Bot loaded at", since_start());
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bot_sprite = n;
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});
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}
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const friction = 0.6;
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let robo_vel = new_v2(0);
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let robo_pos = new_v2(10);
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export function update() {
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// Acceleration from input
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let a = new_v2(0);
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if (btn(Button.Up)) {
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a.y -= 1;
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}
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if (btn(Button.Down)) {
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a.y += 1;
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}
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if (btn(Button.Left)) {
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a.x -= 1;
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}
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if (btn(Button.Right)) {
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a.x += 1;
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}
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vnorm(a);
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// Friction
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let v = vmul(robo_vel, friction);
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v = vadd(v, a);
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// Motion
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let np = vadd(robo_pos, v);
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// TODO: Collide.
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robo_pos = np;
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robo_vel = v;
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}
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export function draw() {
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cls(0.1, 0.2, 0.3);
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if (bot_sprite != undefined) {
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// ...it gets resolved here?
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use_texture(bot_sprite);
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spr(robo_pos.x, robo_pos.y, 32, 32, 0, 0);
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}
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// print("FRAME TIME:", since_last_frame());
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}
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