PHP GD如何在一条线上绘制文本

The final output should be like image(HELLO WORLD):

这就是我正在做的：-

$im = imagecreate(400,400); 

$txtcol = imagecolorallocate($im, 0xFF, 0x00, 0x00);

$size = 20;

$txt = 'DUMMY TEXT';

$font = './font/Capriola-Regular.ttf';

/*two points for base line*/

$x1 = 50; $x2 = 300; 

$y1 = 150; $y2 = 170;

/*bof finding line angle*/

$delta_x = $x2-$x1;

$delta_y = $y2-$y1;

$texangle = (rad2deg(atan2($delta_y,$delta_x)) * 180 / M_PI)-360;

/*eof finding the line angle*/


imageline($im,$x1,$y1,$x2,$y2,$txtcol); //Drawing line

imagettftext($im, $size, $texangle, $x1, $y1, $txtcol, $font, $txt); // Drawing text over line at line's angle

当前输出如下：

有人能告诉我我的代码有什么问题吗？

THanks

好吧，一直在玩。尝试更换：

$texangle = (rad2deg(atan2($delta_y,$delta_x)) * 180 / M_PI)-360;

With:

$texangle = (atan2($delta_y,$delta_x) * -180 / M_PI)-360;

输出你的值：

输出其他值：