PHP : Function Reference : PostScript document creation : ps_translate PHP Examples Tutorials References

Example 2024. Translation 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, "translate.ps")) {

  print "Cannot open PostScript file\n";

  exit;

}

ps_set_info($ps, "Creator", "translate.php");
ps_set_info($ps, "Author", "Uwe Steinmann");
ps_set_info($ps, "Title", "Translated example");
ps_set_info($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_translate($ps, 500, 750);
rectangle($ps);
ps_translate($ps, -500, -750);
ps_setfont($ps, $psfont, 8.0);
ps_show($ps, "Text at initial position");
ps_end_page($ps);

ps_begin_page($ps, 596, 842);
ps_set_text_pos($ps, 100, 100);
ps_save($ps);
ps_translate($ps, 500, 750);
rectangle($ps);
ps_restore($ps);
ps_setfont($ps, $psfont, 8.0);
ps_show($ps, "Text at initial position");
ps_end_page($ps);

ps_delete($ps);
?>

The above example demonstrates two possible ways to place a graphic (in this case just a rectangle) at any position on the page, while the graphic itself uses its own coordinate system. The trick is to change the origin of the current coordinate system before drawing the rectangle. The translation has to undone after the graphic has been drawn.

On the second page a slightly different and more elegant approach is applied. Instead of undoing the translation with a second call of ps_translate() the graphics context is saved before modifying the coordinate system and restored after drawing the rectangle.

ps_translate

Sets translation (PECL ps:1.1.0-1.3.5)
bool ps_translate ( resource psdoc, float x, float y )

Example 2024. Translation of the coordinate system

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ps_translate

Sets translation (PECL ps:1.1.0-1.3.5) bool ps_translate ( resource psdoc, float x, float y )

Example 2024. Translation of the coordinate system

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Sets translation (PECL ps:1.1.0-1.3.5)
bool ps_translate ( resource psdoc, float x, float y )