CODEWITHSUNDEEP
phpgddraw
Ameer
Ameer

Reputation: 771

Draw a rectangle with PHP at an angle

I would like to draw a rectangle at an angle with PHP. I know that you can draw rectangles with PHP using imagefilledrectangle but how to draw it an an angle.

public function drawshelf($x1, $y1, $x2, $y2, $width, $angle = 'false'){
    imagesetthickness ( $this->canvas, 1 );
    for ($i=0; $i < $width; $i++){ //HORIZONTAL
        imageline( $this->canvas, $x1, $y1, $x2, $y2, $this->color );
        $y1++; $y2++;
        if( $angle == 'true' ){ $x1--; $x2--; }
    }
}

I wrote this function to draw it using lines and a loop but its not coming up right like the red box.

Can someone please tell me what am i doing wrong? And can you even draw it like that?

enter image description here

Upvotes: 1

Views: 3781

Answers (2)

nemetroid
nemetroid

Reputation: 2159

I'd suggest using the built in imagerotate along with a rectangle you've created with imagefilledrectangle.

Here's an example, creating a 20x100 red rectangle rotated 30 degrees:

$width = 20;
$height = 100;
$angle = 30;
$im = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($im, 255, 255, 255);
$red = imagecolorallocate($im, 255, 0, 0);

// Draw a red rectangle
imagefilledrectangle($im, 0, 0, $width, $height, $red);
// Rotate and fill out background with white
$im = imagerotate($im, $angle, $white);

Upvotes: 1

user149341
user149341

Reputation:

Use imagepolygon() or imagefilledpolygon() to draw non-rectangular shapes using GD. You may need to review a bit of trigonometry to figure out how to position the points to get right-angle corners.

Upvotes: 6

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