If you have the error <<drawlineto(): failed assertion>> :
Ming can't handel drawLineToTo if the distance from the previous point is over 8276.7 pixels (mesured empiriticaly) in the vertical or horizontal axis
Why ?
Coordinates in SWF are in twips (20 twips = 1 pixel)
and 2^16 = 65536 = 3276.8 * 20
So we can assume that coordinates of drawLineTo in SWf are relatives to the previous point, and take 16 bits (plus the sign).
Or it can be ming that brings this limitation
These measures have been made with ming_setScale(20.00000000);
This issue doesn't seem to occur with movePenTo
Here's how you can handle this :
<?php
function splitForMing($x1, $y1, $x2, $y2) {
$res = array();
$nbSegments = floor(max(abs($x2 - $x1), abs($y2 - $y1)) / 3276) + 1;
for($i = 1; $i < $nbSegments ; $i++) { $res[] = array($x1 + ($x2 - $x1) * $i / $nbSegments, $y1 + ($y2 - $y1) * $i / $nbSegments);
}
$res[] = array($x2, $y2);
return $res;
}
ming_setScale(20.00000000);
ming_useswfversion(6); $movie = new SWFMovie();
$movie->setDimension(20000,8000);
$movie->setBackground(0xcc, 0xcc, 0xcc );
$movie->setRate(24);
$polygone = new SWFShape();
$polygone->setRightFill($polygone->addFill(0xff, 0, 0));
$polygone->setLine(20, 0x7f, 0, 0);
$polygone->movePenTo(10000, 500); $tmp = splitForMing(10000, 500, 15000, 500);
for( $i = 0 ; $i < count($tmp) ; $i++) {
$polygone->drawLineTo($tmp[$i][0], $tmp[$i][1]); }
$tmp = splitForMing(15000, 500, 15000, 5500);
for( $i = 0 ; $i < count($tmp) ; $i++) {
$polygone->drawLineTo($tmp[$i][0], $tmp[$i][1]); }
$tmp = splitForMing(15000, 5500, 10000, 500);
for( $i = 0 ; $i < count($tmp) ; $i++) {
$polygone->drawLineTo($tmp[$i][0], $tmp[$i][1]); }
$polygone->drawLineTo(15000, 15000);
$ajout = $movie->add($polygone);
$ajout->setName("test");
$movie->output();
?>