RE: [PHP-WIN] cosine and sin in PHP on Win2K & IIS 5

Hi, your problem is probably because php expects your angle to be expressed in radians and you are expressing it in degrees... To covert you can use these equations: degrees=radians*(180/PI) radians=degrees*(PI/180) hth, Kelvin. -----Original Message----- From: Bradley J Bristow-Stagg [mailto:bradley@stagghouse.f2s.com] Sent: 19 June 2001 06:16 To: php-windows@lists.php.net Subject: [PHP-WIN] cosine and sin in PHP on Win2K & IIS 5 Hey guys, I am currently dabbling in a little graphics generation with gd_lib in PHP on my Win2K box with IIS 5. Up until now I have had ZERO problems and am really loving working with PHP. My problem then? Well I am rotating a polygon around a point and PHP is not giving me correct values for cos() and sine().. Some sample code and values follow: <code> print "cos:".cos(270); print "sine:".sine(270); </code> <display> cos:0.9843819506325 sin:-0.17604594647121 </display> What's wrong with this picture? Well using my trusty scientific calculator (from the ol' school days) I get: cosine(270) = 0 sine(270) = -1 Without getting correct values for the sine and cosine the rotation equations do some really funky stuff =). So what do I do now? Regards Bradley J Bristow-Stagg /------------------------------------------------------------------------\ \ "Luminous beings are we.. not this crude matter" - Yoda / / "The earth is but ONE country and Mankind it's citizens" - Baha'u'llah \ \------------------------------------------------------------------------/ / www: http://www.staggmatrix.f2s.com | ICQ#: 8618833 \ \------------------------------------------------------------------------/ -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-windows-unsubscribe@lists.php.net For additional commands, e-mail: php-windows-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net