57 lines
1.4 KiB
HTML
57 lines
1.4 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<?php session_start();?>
|
|
<?php include 'includes/meta.php'; ?>
|
|
</head>
|
|
|
|
|
|
<body>
|
|
<?php include 'includes/header.php'; ?>
|
|
<canvas id="mandelbrot" width="500" height="500">walou</canvas>
|
|
BIS
|
|
<script type="text/javascript">
|
|
window.onload = function() {
|
|
var canvas = document.getElementById('mandelbrot');
|
|
if (!canvas) {
|
|
alert("Impossible de récupérer le canvas");
|
|
return;
|
|
}
|
|
|
|
var context = canvas.getContext('2d');
|
|
if (!context) {
|
|
alert("Impossible de récupérer le context du canvas");
|
|
return;
|
|
}
|
|
context.fillStyle = "#ff0000";
|
|
|
|
var x1 = -2.1, x2 = 0.6, y1 = -1.2, y2 = 1.2, zoom = 100, iterations_max = 50, image_x = (x2 - x1)
|
|
* zoom, image_y = (y2 - y1) * zoom;
|
|
canvas.width = image_x;
|
|
canvas.heigth = image_y;
|
|
|
|
for (x = 0; x < image_x; x++) {
|
|
for (y = 0; y < image_y; y++) {
|
|
c_r = x / zoom + x1;
|
|
c_i = y / zoom + y1;
|
|
z_r = 0;
|
|
z_i = 0;
|
|
i = 0;
|
|
do {
|
|
var tmp = z_r;
|
|
z_r = z_r * z_r - z_i * z_i + c_r;
|
|
z_i = 2 * tmp * z_i + c_i;
|
|
i++;
|
|
} while (z_r * z_r + z_i * z_i < 4 && i < iterations_max);
|
|
if (i == iterations_max) {
|
|
context.fillStyle = "#FFFFFF";
|
|
context.fillRect(x, y, 1, 1);
|
|
}else{
|
|
context.fillStyle = "rgb(0, 0, "+255-(i*255/iterations_max)+")";
|
|
context.fillRect(x,y,1,1);
|
|
}
|
|
alert('done');
|
|
}
|
|
}
|
|
}
|
|
</script> |