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趣味编程-php输出笛卡尔心形图案

WBOY
WBOYOriginal
2016-06-20 12:39:201090browse

代码:

PHP

$width = 600; $height = 650; header("Content-type: image/gif"); $img = imagecreate($width,$height);//创建一张图片 $bg color = imagecolorallocate($img,0,0,0); $red = imagecolorallocate($img,255,0,0); for($i=0;$i

$width = 600;$height = 650;header("Content-type: image/gif");$img = imagecreate($width,$height);//创建一张图片$bg_color = imagecolorallocate($img,0,0,0);$red = imagecolorallocate($img,255,0,0);for($i=0;$i<=100;$i++){    for($j=0;$j<=100;$j++){         $r = M_PI/50*$i * (1-sin(M_PI/50*$j))*40;        $x = $r *cos(M_PI/50*$j)*sin(M_PI/50*$i)+$width/2;        $y = -$r*sin(M_PI/50*$j)+$height/6;        imagesetpixel($img,$x,$y,$red);    }}imagegif($img);imagedestroy($img);

效果如下:

代码转自 博客

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