PHP GD如何在一行上绘制文本 [英] PHP GD how to draw text over a line

问题描述

最终输出应类似于image(HELLO WORLD):

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

这是我在做什么:-

$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:

有人可以告诉我我的代码有什么问题吗?

Can anybody tell whats the wrong with my code?

谢谢

推荐答案

好，一直在玩.尝试更换:

Ok, been playing around. Try replacing:

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

使用:

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

输出您的值:

输出其他值:

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