cosine and sin in PHP on Win2K & IIS 5
| From: | Bradley J Bristow-Stagg | Date: | Tue, 19 Jun 2001 05:15:40 +0000 |
| Subject: | cosine and sin in PHP on Win2K & IIS 5 | ||
| Groups: | php.windows | ||
| Request: | Send a blank email to php-windows+get-7931@lists.php.net to get a copy of this message | ||
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
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