PHP



imageSetPixel

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int imageSetPixel(int im, int x, int y, int color)

color im, (x, y).

imageLine

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int imageLine(int im, int x1, int y1, int x2, int y2, int color)

im, (x1, y1) (x2, y2), color. .

<?php function imagelinethick($image, $x1, $y1, $x2, $y2, $color, $thick = 1) { /* this way it works well only for orthogonal lines imagesetthickness($image, $thick); return imageline($image, $x1, $y1, $x2, $y2, $color); */ if ($thick == 1) { return imageline($image, $x1, $y1, $x2, $y2, $color); } $t = $thick / 2 - 0.5; if ($x1 == $x2 || $y1 == $y2) { return imagefilledrectangle($image, round(min($x1, $x2) - $t), round(min($y1, $y2) - $t), round(max($x1, $x2) + $t), round(max($y1, $y2) + $t), $color); } $k = ($y2 - $y1) / ($x2 - $x1); //y = kx + q $a = $t / sqrt(1 + pow($k, 2)); $points = array( round($x1 - (1+$k)*$a), round($y1 + (1-$k)*$a), round($x1 - (1-$k)*$a), round($y1 - (1+$k)*$a), round($x2 + (1+$k)*$a), round($y2 - (1-$k)*$a), round($x2 + (1-$k)*$a), round($y2 + (1+$k)*$a), ); imagefilledpolygon($image, $points, 4, $color); return imagepolygon($image, $points, 4, $color);};?>

 

imageDashedLine

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int imageDashedLine(int im, int x1, int y1, int x2, int y2, int color)

, imageLine(), , . , , , , , imageLine().

imageRectangle

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int imageRectangle(int im, int x1, int y1, int x2, int y2, int color)