What is PhpDig?
PhpDig is a PHP MySQL based
Web Spider & Search Engine.



cpdf_setflat — Sets flatness


bool cpdf_setflat(pdfdoc, flatness);
resource pdfdoc: PDF document identifier
double flatness: Flatness value


TRUE on success or FALSE on error


Sets the maximum distance between the object path and an approximation constructed from straight lines. flatness can take a value from 0 to 100. The default value of flatness is 0 which is reset at the beginning of each page. For example, when an arc is drawn with a high value of cpdf_setflat() , the number of lines drawn to make up the arc is decreased, leading to a less smoothly curved drawing.


Since versions 3.0.8 and 4.0


Example 167. Draw a curve

// start a PDF document
$cpdf = cpdf_open(0, "test.pdf");

// create a 600x400 page
cpdf_page_init($cpdf, 1, 0, 600, 400, 1);

// set flatness
cpdf_setflat($cpdf, 50);

// draw simple arc
cpdf_moveto($cpdf, 100, 100, 1);
cpdf_lineto($cpdf, 150, 100, 1);
cpdf_curveto($cpdf, 350, 100, 325, 300, 300, 100, 1);

// close and write document

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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