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racer.html
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<html>
<head>
<style>
* {
margin: 0;
padding: 0;
}
body,
html {
background-color: black;
height: 100%;
}
canvas {
padding: 0;
margin: auto;
display: block;
height: 100%;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
background-size: 100% 100%;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/nipplejs/0.10.0/nipplejs.min.js"></script>
</head>
<body>
<canvas id="canvas" width="640" height="480">
</canvas>
<script type="module">
/**
* scenario: Nemokary
* */
import Input from "./engine/input.js";
import { Game, Scene, CircleEngineLogoScene, TitleScene, GameOverScene } from "./engine/core.js";
import {
intersects,
isInside, ensurePositionInside, bounce, Geometry, moveOutside
} from "./engine/physics.js";
import {
Sound
} from "./engine/sound.js";
import {
Circle, Particule, MisterSaturn
} from "./engine/objects.js";
import { randomColor, randomColorAlpha, randomAmplitude } from "./engine/random.js";
import { Music } from "./engine/music.js";
const preparationInter = 37;
const A = 0.6;
const turnSpeed = 0.02;
const DECCELERATIONFACTOR_OK = 0.9;
const DECCELERATIONFACTOR_OBSTACLE = 0.1;
class Car extends Circle {
constructor({ x, y, color = "red", accelerationPower = A }) {
super({ x, y, r: 16, color });
this.angle = -Math.PI / 2;
this.accelerationPower = accelerationPower;
this.decelerationFactor = DECCELERATIONFACTOR_OK;
}
get speedRealNumber() {
return this.lastposition ?
Geometry.norm(Geometry.diff(this.position, this.lastposition))
: 0;
}
get direction() {
return { x: Math.cos(this.angle), y: Math.sin(this.angle) };
}
get butt() {
return {
x: this.position.x - this.r * this.direction.x,
y: this.position.y - this.r * this.direction.y
}
}
turn(d) {
this.angle += d;
/* if (this.platformCurrent) {
const a = Math.atan2(this.position.y - this.platformCurrent.position.y, this.position.x - this.platformCurrent.position.x)
this.speed = Geometry.add(this.speed, { x: -speed * d * Math.sin(a), y: speed * d * Math.cos(a) });
}
else*/
}
left() { this.turn(-turnSpeed); }
right() { this.turn(turnSpeed); }
up() {
this.acceleration.x += this.accelerationPower * Math.cos(this.angle);
this.acceleration.y += this.accelerationPower * Math.sin(this.angle);
}
down() {
this.acceleration.x -= this.accelerationPower * Math.cos(this.angle);
this.acceleration.y -= this.accelerationPower * Math.sin(this.angle);
}
action() {
this.up();
}
handleAcceleration() {
this.acceleration.x *= this.decelerationFactor;
this.acceleration.y *= this.decelerationFactor;
}
live() {
this.handleAcceleration();
}
draw(ctx) {
const drawWheel = (p) => {
ctx.fillStyle = "black";
ctx.disk(p.x, p.y, 7);
}
const A1 = Geometry.pointFromCenterRadiusAngle(this.position.x, this.position.y, 9, this.angle);
const wheel11 = Geometry.pointFromCenterRadiusAngle(A1.x, A1.y, 9, this.angle + Math.PI / 2);
const wheel12 = Geometry.pointFromCenterRadiusAngle(A1.x, A1.y, 9, this.angle - Math.PI / 2);
const A2 = Geometry.pointFromCenterRadiusAngle(this.position.x, this.position.y, 10, this.angle + Math.PI);
const wheel21 = Geometry.pointFromCenterRadiusAngle(A2.x, A2.y, 9, this.angle + Math.PI / 2);
const wheel22 = Geometry.pointFromCenterRadiusAngle(A2.x, A2.y, 9, this.angle - Math.PI / 2);
drawWheel(wheel11);
drawWheel(wheel12);
drawWheel(wheel21);
drawWheel(wheel22);
ctx.fillStyle = this.color;
const AA = Geometry.pointFromCenterRadiusAngle(this.position.x, this.position.y, 11, this.angle);
ctx.disk(AA.x, AA.y, 12);
super.draw(ctx);
}
}
let player;
class RacerScene extends Scene {
createTree({ x, y }) {
const c = new Circle({
x, y: y + 8, z: -0.5, color: '#00FF00', r: 12,
});
this.add(c);
this.border.add(c);
const r = 16 + randomAmplitude(8);
for (let i = 0; i < 4; i++)
this.add(new Circle({
x: x + randomAmplitude(16),
y: y + 16 + randomAmplitude(16), z: -1, color: randomColor(128, 64, 64), r: 12
}));
this.add(new Circle({ x, y: y + 16, z: -0.5, color: randomColor(128, 0, 0), r: 8 }));
this.add(new Circle({ x, y, z: 0, color: randomColor(0, 128, 0), r: r }))
}
constructor() {
super();
Music.play("Gyorgy Cziffra - Liszt Grand Galop Chromatique -(128kbps).ogg")
this.border = this.createGroup();
this.cars = this.createGroup();
this.road = this.createGroup();
this.items = this.createGroup();
this.preparation = preparationInter * 3;
}
live(ctx) {
this.cameraAttach(player);
if (this.preparation == 0)
this.beginningTime = Date.now();
this.preparation--;
if (this.preparation < 0)
Input.control2DCross(player, { speed: 3 });
const handleCars = (car, isPlayer) => {
this.add(new Particule({
x: car.butt.x + randomAmplitude(8),
y: car.butt.y + randomAmplitude(8),
r: 2 + 2 * Geometry.norm(car.speed),
color: randomColorAlpha(64, 64, 64, 0.05)
}));
car.decelerationFactor = DECCELERATIONFACTOR_OK;
for (const obstacle of this.border) {
if (car != obstacle)
if (intersects(car, obstacle)) {
// obstacle.color = "black";
/* if (car == player && player.speedRealNumber > 1)
Sound.playIfNot("frottement.ogg");
*/
car.decelerationFactor = DECCELERATIONFACTOR_OBSTACLE;
moveOutside(car, obstacle);
}
}
ensurePositionInside(car, this.road);
}
/* for (const obstacle of this.border)
obstacle.color = "white";
*/
for (const enemy of this.cars) handleCars(enemy);
handleCars(player, true);
for (const item of this.items) {
if (intersects(player, item)) {
game.delete(item);
}
}
for (const car of this.cars)
for (const car2 of this.cars)
if (car != car2)
if (intersects(car, car2)) {
moveOutside(car2, car);
}
for (const car of this.cars)
if (car != player)
if (intersects(car, player)) {
Sound.playIfNot("hurt.ogg");
moveOutside(player, car);
}
for (const c of this.road)
if (intersects(c, player)) {
c.visited = true;
}
if ([...this.road].every((c) => c.visited)) {
if (this.score == undefined)
this.score = this.time;
}
}
drawFixed(ctx) {
const speed = player.speedRealNumber;
ctx.font = "bold 32px sans serif";
ctx.textAlign = "left";
ctx.fillStyle = "black";
ctx.fillText((speed * 30).toFixed(0) + "km/h", 0, 32)
if (this.preparation < 0)
Music.music.playbackRate = 0.5 + 0.5 * speed / 10;
if (this.preparation < 0) {
ctx.fillStyle = "black";
let time = this.score ? this.score : this.time;
const millisec = (time % 1000).toString().padStart(3, '0');
time = Math.floor(time / 1000);
const secondes = (time % 60).toString().padStart(2, '0');
time = Math.floor(time / 60);
const minutes = time.toString().padStart(2, '0');
ctx.fillText(minutes + ":" + secondes + ":" + millisec, 450, 32)
}
const drawMiddleScreen = (txt, a, size = 256) => {
ctx.font = `bold ${size}px sans serif`;
ctx.textAlign = "center";
ctx.fillStyle = `rgba(255, 255, 255, ${a})`;
ctx.strokeStyle = `rgba(0, 0, 0, ${a})`;
ctx.fillText(txt, 320, 320)
ctx.strokeText(txt, 320, 320)
}
if (this.score) {
drawMiddleScreen("Course cleared!", 1, 64)
}
if (this.preparation > 0) {
drawMiddleScreen(Math.floor(this.preparation / preparationInter) + 1, (this.preparation % preparationInter) / preparationInter);
}
else if (this.preparation > -preparationInter) {
drawMiddleScreen("Go!", 1 - ((preparationInter - this.preparation) % preparationInter) / preparationInter)
}
player.lastposition = { x: player.position.x, y: player.position.y };
}
}
class Level1Scene extends RacerScene {
constructor() {
super();
const background = new Circle({ x: 0, y: 0, z: -3, color: "#aaaa55", r: 12800 }); //#aaaa55
this.add(background);
const dt = 0.0012;
/*const f = (t) => {
const angle = t * 2 * Math.PI;
return { x: 1640 * Math.cos(angle), y: 1480 * Math.sin(angle) };
}*/
const f = (t) => {
const angle = t * 2 * Math.PI;
const p = { x: 0, y: 0 };
const R = [0, 2000, 100, 100, 200];
const S = [0, 0, -1, 1, 2];
for (let i = 0; i < R.length; i++) {
p.x += R[i] * Math.cos(i * angle + S[i]);
p.y += R[i] * Math.sin(i * angle + S[i]);
}
return p;
}
const width = (t) => {
const angle = t * 4 * Math.PI;
return 32 + 64 * Math.abs(Math.cos(angle));
}
const getAngle = (t) => {
const p2 = f(t + dt);
const p = f(t);
return Math.atan2(p2.y - p.y, p2.x - p.x) + Math.PI;
}
for (let t = 0; t < 1; t += dt) {
const pt = f(t);
const C = new Circle({
x: pt.x, y: pt.y, r: width(t) - 4,
color: randomColor(192, 128, 64, 32),
z: -1 + t,
});
this.road.add(C);
this.add(C);
}
for (let t = 0; t < 1-dt; t += dt) {
const pt = f(t);
const ptnext = f(t + dt);
const vectorU = Geometry.normalize({ x: ptnext.x - pt.x, y: ptnext.y - pt.y });
const d2 = width(t);
const radiusBorder = 4;
const C1 = new Circle({
x: pt.x - vectorU.y * d2, y: pt.y + vectorU.x * d2, r: radiusBorder, z: -1 + t + 0.01,
color: Math.abs(t) < dt ? "black" : "#FFFFFFDD",
});
C1.left = true;
const C2 = new Circle({
x: pt.x + vectorU.y * d2, y: pt.y - vectorU.x * d2, r: radiusBorder, z: -1 + t + 0.01,
color: Math.abs(t) < dt ? "black" : "#FFFFFFDD",
});
C1.right = true;
if (Math.random() < 0.2) {
const T = 32 + 64 * Math.random();
this.createTree({ x: pt.x - vectorU.y * (d2 + T), y: pt.y + vectorU.x * (d2 + T) });
}
if (Math.random() < 0.5) {
const T = 32 + 64 * Math.random();
this.createTree({ x: pt.x + vectorU.y * (d2 + T), y: pt.y - vectorU.x * (d2 + T) });
}
this.border.add(C1);
this.add(C1);
this.border.add(C2);
this.add(C2);
}
/*
for (let x = 0; x < 10000; x += 100) {
const cloud = new Circle({
x: x + 100 * Math.random(),
y: -300 + 500 * Math.random(),
color: "#FFFFFF22", r: 100
});
this.add(cloud);
}*/
player = new Car({ x: f(0).x + 52, y: f(0).y, z: 10, color: "red", accelerationPower: A * 1.05 });
player.angle = getAngle(0);
player.pv = 10;
this.add(player);
for (let t = -0.25; t < 0.25; t += dt) if (Math.random() > 0.9) {
//const enemy = new Car({ x: f(0).x + 10 - i * 42, y: f(0).y, z: 10, color: randomColor(0, 128, 255) });
const enemy = new Car({ x: f(t).x, y: f(t).y, z: 10, color: randomColor(0, 128, 255) });
enemy.angle = getAngle(t);
enemy.live = () => {
if (this.preparation > 0)
return;
enemy.handleAcceleration();
const u = { x: Math.cos(enemy.angle), y: Math.sin(enemy.angle) };
const nextroad = [...this.road].filter((o) =>
(o.position.x - enemy.position.x) * (u.x)
+ (o.position.y - enemy.position.y) * (u.y) > 0
&& Geometry.distance(o, enemy) < 200
);
let v = 0;
/*for (const o of this.road)
o.color = "grey";
for (const o of nextroad) {
o.color = "green";
}*/
for (const o of nextroad) {
v += (o.position.x - enemy.position.x) * (u.y)
- (o.position.y - enemy.position.y) * (u.x);
}
if (Math.random() < 0.5)
if (v > 0)
enemy.left()
else
enemy.right();
else {
if (Math.random() < 0.5)
enemy.left()
else
enemy.right();
}
enemy.up();
}
this.cars.add(enemy);
this.add(enemy);
}
}
live() {
super.live();
}
}
Game.setScene(new CircleEngineLogoScene(
() => Game.setScene(new TitleScene("Save the road",
() => Game.setScene(new Level1Scene())
)
)));
// Game.setScene(new Level1Scene());
Game.setScene(new CircleEngineLogoScene(
() =>
Game.setScene(
new TitleScene("The Liszt's \n Grand Galop \n Chromatique Race",
() => Game.setScene(new Level1Scene(player))))));
</script>
</body>
</html>