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cpdf_arc
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cpdf_arc

Name

cpdf_arc — Draws an arc

Synopsis

bool cpdf_arc(pdfdoc, x, y, radius, start, end[, mode]); resource pdfdoc: PDF document identifier double x: X coordinate double y: Y coordinate double radius: Radius double start: Start angle double end: End angle int mode (optional): Units mode

Returns

TRUE on success or FALSE on error

Description

Draws an arc with the curve origin (0 degrees) starting at x , y . The arcs curves up and to the left from the origin point in an anticlockwise direction. Some trial and error may be required to understand how the arc behaves when using start and and end angles which are between 0 and 360 degrees. Don't forget to use pdf_stroke() to stroke the object otherwise the object will not appear in the PDF document.

If mode is specified, coordinates are calculated in PostScript points. There are usually 72 PostScript points to an inch. If not specified or set to 0, then the pages default units are used.

Version

Since versions 3.0.8 and 4.0

Example

Example 117. Draw two arcs

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

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

// draw first arc from 90 to 180 degrees
cpdf_arc($cpdf, 200, 300, 50, 90, 180);
cpdf_stroke($cpdf);

// write text in center of page
cpdf_begin_text($cpdf);
cpdf_set_font($cpdf, "Helvetica", 18, "WinAnsiEncoding");
cpdf_show_xy($cpdf, "TEST", 200, 300);
cpdf_end_text($cpdf);

// draw second arc from 360 to 270 degrees
// note show the co-ordinates go in opposite direction to first arc
cpdf_arc($cpdf, 250, 300, 50, 360, 270);
cpdf_stroke($cpdf);
    
// close and write document
cpdf_finalize($cpdf);
cpdf_close($cpdf);

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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 http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ 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.