engine.scope(({ start, cls, spr, mset, mget, map, fget, circfill, line, btn, caption }) => { const sprites = { grass: [ [ 3, 3, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 11, ], [false, false, false, false, false, false, false, false], ], road: [ [ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, ], [true, false, false, false, false, false, false, false], ], finish: [ [ 7, 0, 7, 0, 7, 0, 7, 0, 0, 7, 0, 7, 0, 7, 0, 7, 7, 0, 7, 0, 7, 0, 7, 0, 0, 7, 0, 7, 0, 7, 0, 7, 7, 0, 7, 0, 7, 0, 7, 0, 0, 7, 0, 7, 0, 7, 0, 7, 7, 0, 7, 0, 7, 0, 7, 0, 0, 7, 0, 7, 0, 7, 0, 7, ], [true, true, false, false, false, false, false, false], ], }; const turnSpeed = 0.05; const carRadius = 3; function makeCar(sx, sy, sa, color) { return { x: sx, y: sy, angle: sa, speed: 0, color }; } const p1 = makeCar(60, 20, 0, 8); const p2 = makeCar(60, 28, 0, 12); function buildTrack() { for (let r = 0; r < 16; r++) { for (let c = 0; c < 16; c++) { mset(c, r, 'grass'); } } for (let c = 2; c <= 13; c++) { mset(c, 2, 'road'); mset(c, 3, 'road'); } for (let c = 2; c <= 13; c++) { mset(c, 12, 'road'); mset(c, 13, 'road'); } for (let r = 2; r <= 13; r++) { mset(2, r, 'road'); mset(3, r, 'road'); } for (let r = 2; r <= 13; r++) { mset(12, r, 'road'); mset(13, r, 'road'); } mset(7, 2, 'finish'); mset(7, 3, 'finish'); } function isOnRoad(px, py) { const tile = mget(Math.floor(px / 8), Math.floor(py / 8)); return tile && fget(tile, 0); } function updateCar(car, left, right, gas, reverse) { const onRoad = isOnRoad(car.x, car.y); const accel = onRoad ? 0.08 : 0.04; const friction = onRoad ? 0.97 : 0.92; const max = onRoad ? 1.5 : 0.6; if (btn(left)) car.angle -= turnSpeed; if (btn(right)) car.angle += turnSpeed; if (btn(gas)) car.speed += accel; if (btn(reverse)) car.speed -= accel; car.speed *= friction; if (car.speed > max) car.speed = max; if (car.speed < -max / 2) car.speed = -max / 2; if (Math.abs(car.speed) < 0.01) car.speed = 0; car.x += Math.cos(car.angle) * car.speed; car.y += Math.sin(car.angle) * car.speed; if (car.x < 4) car.x = 4; if (car.x > 124) car.x = 124; if (car.y < 4) car.y = 4; if (car.y > 124) car.y = 124; } function resolveCollision(a, b) { const dx = b.x - a.x; const dy = b.y - a.y; const dist = Math.sqrt(dx * dx + dy * dy); const minDist = carRadius * 2; if (dist < minDist && dist > 0) { const nx = dx / dist; const ny = dy / dist; const overlap = (minDist - dist) / 2; a.x -= nx * overlap; a.y -= ny * overlap; b.x += nx * overlap; b.y += ny * overlap; a.speed *= 0.7; b.speed *= 0.7; } } function drawCar(car) { circfill(car.x, car.y, carRadius, car.color); line(car.x, car.y, car.x + Math.cos(car.angle) * 5, car.y + Math.sin(car.angle) * 5, 10); } function init() { buildTrack(); } function update() { updateCar(p1, 'ArrowLeft', 'ArrowRight', 'ArrowUp', 'ArrowDown'); updateCar(p2, 'a', 'd', 'w', 's'); resolveCollision(p1, p2); } function draw() { cls(0); map(); drawCar(p1); drawCar(p2); caption('p1: arrows', 2, 2, 8); caption('p2: wasd', 2, 10, 12); } start({ sprites, sounds: {}, init, update, draw, target }); });

Editing: Racing: Collisions

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