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



cpdf_setmiterlimit — Sets miter limit


bool cpdf_setmiterlimit(pdfdoc, value);
resource pdfdoc: PDF document identifier
double value: Miter type


TRUE on success or FALSE on error


When the join in cpdf_setlinejoin() is set to 0 (a miter join), the joining of two lines at a steep angle can result in a large peak which may look unattractive. Using cpdf_setmiterlimit() , the ratio of line width to mitre length is calculated and if the result exceeds the mitre limit then the join type is automatically changed to a bevel.


Since versions 3.0.8 and 4.0


Example 174. Control miter limit

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

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

// set line width to show effect

// set a miter join
cpdf_setlinejoin($cpdf, 0);

// draw line
cpdf_moveto($cpdf, 200, 600);
cpdf_lineto($cpdf, 250, 500);
cpdf_lineto($cpdf, 300, 600);

// thicken line

// alter the miter limit 
cpdf_setmiterlimit($cpdf, 2);

// trigger a miter to bevel change
cpdf_setlinejoin($cpdf, 0);
cpdf_moveto($cpdf, 200, 500);
cpdf_lineto($cpdf, 250, 400);
cpdf_lineto($cpdf, 300, 500);

// 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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