Created
March 30, 2014 19:27
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avoiding collision, canvas, animation, ai
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<!doctype html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<title>Bouncing 1</title> | |
<link rel="stylesheet" href="./include/style.css"> | |
</head> | |
<body> | |
<canvas id="canvas" width="400" height="400"></canvas> | |
<script src="./include/utils.js"></script> | |
<script src="./classes/ball.js"></script> | |
<script> | |
window.onload = function() { | |
var canvas = document.getElementById('canvas'), | |
context = canvas.getContext('2d'), | |
ball = new Ball(10, 'blue'), | |
vx = 1, | |
vy = 1; | |
ball.x = 100; | |
ball.y = 100; | |
var Ball2 = new Ball(10, 'green'); | |
var staticBall = function () { | |
Ball2.x = canvas.width / 2; | |
Ball2.y = canvas.height / 2; | |
Ball2.draw(context); | |
}; | |
var checkCollision = function (obj) { | |
var radius = 50; | |
var dy = Ball2.y - obj.y; | |
var dx = Ball2.x - obj.x; | |
if ((dx <= radius && dy <= radius) && (dy > -radius && dx > -radius)) { | |
return {x: dx, y: dy}; | |
} else { | |
return false; | |
} | |
}; | |
var vLenght = function (one, two) { | |
return Math.sqrt(Math.abs(one.x * two.x + one.y * two.y)); | |
}; | |
(function drawFrame() { | |
window.requestAnimationFrame(drawFrame, canvas); | |
context.clearRect(0, 0, canvas.width, canvas.height); | |
staticBall(); | |
var distance = checkCollision(ball); | |
if (distance) { | |
var l = vLenght(distance, ball); | |
var u = {x: distance.x / l, y: distance.y / l}; | |
} | |
else { | |
var u = {x: 0, y: 0}; | |
} | |
if (ball.x < 380) { | |
ball.x += vx + (u.x * 10); | |
ball.y += vy; | |
} | |
ball.draw(context); | |
}()); | |
}; | |
</script> | |
</body> | |
</html> |
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