ps_rotate

ps_rotate

Sets rotation factor

bool **ps_rotate** resource $psdoc float $rot

Sets the rotation of the coordinate system.

psdoc Resource identifier of the postscript file as returned by . ps_new

rotAngle of rotation in degree.

return.success

Voorbeeld: Rotation of the coordinate system

<?php
function rectangle($ps) {
    ps_moveto($ps, 0, 0);
    ps_lineto($ps, 0, 50);
    ps_lineto($ps, 50, 50);
    ps_lineto($ps, 50, 0);
    ps_lineto($ps, 0, 0);
    ps_stroke($ps);
}

$ps = ps_new();
if (!ps_open_file($ps, "rotation.ps")) {
  print "Cannot open PostScript file\n";
  exit;
}

ps_set_info($ps, "Creator", "rotation.php");
ps_set_info($ps, "Author", "Uwe Steinmann");
ps_set_info($ps, "Title", "Rotation example");
ps_set_info($ps, "BoundingBox", "0 0 596 842");

$psfont = ps_findfont($ps, "Helvetica", "", 0);

ps_begin_page($ps, 596, 842);
ps_set_text_pos($ps, 100, 100);
ps_save($ps);
ps_translate($ps, 100, 100);
ps_rotate($ps, 45);
rectangle($ps);
ps_restore($ps);
ps_setfont($ps, $psfont, 8.0);
ps_show($ps, "Text without rotation");
ps_end_page($ps);

ps_delete($ps);
?>

 The above example illustrates a very common way of rotating a
 graphic (in this case just a rectangle) by simply rotating the
 coordinate system. Since the graphic's coordinate system assumes
 (0,0) to be the origin, the page coordinate system is also translated
 to place the graphics not on the edge of the page. Pay attention
 to the order of  and
 .  In the above case the rectancle is
 rotated around the point (100, 100) in the untranslated coordinate
 system. Switching the two statements has a completely
 different result.
`ps_translate``ps_rotate`


 In order to output the following text at the original position, all
 modifications of the coordinate system are encapsulated in
  and .
`ps_save``ps_restore`

ps_scale``ps_translate