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Make this into a 2-player game #5

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Make this into a 2-player game #5

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94 changes: 94 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,25 @@
let dx2 = -8;
let dy2 = -8;

let pw = 10;
let ph = 200;

// Paddles
let px1 = canvas.width / 32;
let py1 = (canvas.height / 2) - (ph / 2);
let dpy1 = 20;

let px2 = (canvas.width / 32) * 31;
let py2 = (canvas.height / 2) - (ph / 2);
let dpy2 = 20;

// Keys
let u1 = 'q';
let d1 = 'a';

let u2 = 'p';
let d2 = 'l';

function drawBall(x, y, color) {
ctx.beginPath();
ctx.arc(x, y, squareSize / 2, 0, Math.PI * 2, false);
Expand All @@ -131,6 +150,13 @@
}
}

function drawPaddles() {
ctx.fillStyle = TEAM2;
ctx.fillRect(px1, py1, pw, ph);
ctx.fillStyle = TEAM1;
ctx.fillRect(px2, py2, pw, ph);
}

function randomNum(min, max) {
return Math.random() * (max - min) + min;
}
Expand All @@ -139,6 +165,26 @@
let updatedDx = dx;
let updatedDy = dy;

// Bounce off paddles
if (x + dx > px1 && x + dx < px1 + pw && y + dy > py1 && y + dy < py1 + ph) {
let paddleCenterY = py1 + ph / 2;
let distanceFromCenter = y - paddleCenterY;
let normalizedDistance = distanceFromCenter / (ph / 2);
let bounceAngle = normalizedDistance * (Math.PI / 3);
updatedDx = -updatedDx;
updatedDy = Math.tan(bounceAngle) * updatedDx;
}

if (x + dx > px2 && x + dx < px2 + pw && y + dy > py2 && y + dy < py2 + ph) {
let paddleCenterY = py2 + ph / 2;
let distanceFromCenter = y - paddleCenterY;
let normalizedDistance = distanceFromCenter / (ph / 2);
let bounceAngle = normalizedDistance * (Math.PI / 3);
updatedDx = - updatedDx;
updatedDy = - Math.tan(bounceAngle) * updatedDx;
}


// Check multiple points around the ball's circumference
for (let angle = 0; angle < Math.PI * 2; angle += Math.PI / 4) {
let checkX = x + Math.cos(angle) * (squareSize / 2);
Expand Down Expand Up @@ -186,6 +232,7 @@
function draw() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
drawSquares();
drawPaddles();

drawBall(x1, y1, TEAM1_BALL);
let bounce1 = updateSquareAndBounce(x1, y1, dx1, dy1, TEAM1);
Expand Down Expand Up @@ -233,6 +280,53 @@
requestAnimationFrame(draw);
}

let intervals = {
p1up: null,
p1down: null,
};

window.addEventListener('keydown', function (event) {
if (event.key === u1) {
if (intervals.p1up !== null) return;
intervals.p1up = setInterval(() => { py1 = constrain(py1 - dpy1) }, 15);
} else if (event.key === d1) {
if (intervals.p1down !== null) return;
intervals.p1down = setInterval(() => { py1 = constrain(py1 + dpy1) }, 15);
} else if (event.key === u2) {
if (intervals.p2up !== null) return;
intervals.p2up = setInterval(() => { py2 = constrain(py2 - dpy2) }, 15);
} else if (event.key === d2) {
if (intervals.p2down !== null) return;
intervals.p2down = setInterval(() => { py2 = constrain(py2 + dpy2) }, 15);
}
});

function constrain(py) {
if (py < 0) {
return 0;
} else if (py > canvas.height - ph) {
return canvas.height - ph;
} else {
return py;
}
}

window.addEventListener('keyup', function (event) {
if (event.key === u1 && intervals.p1up !== null) {
clearInterval(intervals.p1up);
intervals.p1up = null;
} else if (event.key === d1 && intervals.p1down !== null) {
clearInterval(intervals.p1down);
intervals.p1down = null;
} else if (event.key === u2 && intervals.p2up !== null) {
clearInterval(intervals.p2up);
intervals.p2up = null;
} else if (event.key === d2 && intervals.p2down !== null) {
clearInterval(intervals.p2down);
intervals.p2down = null;
}
});

requestAnimationFrame(draw);
</script>
</html>