gd project question
| From: | Michael Geier | Date: | Fri, 31 May 2002 15:17:53 +0000 |
| Subject: | gd project question | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-100104@lists.php.net to get a copy of this message | ||
I have the following issue:
I am making a "gas guage" based on a percentage.
ie.
- a 180 degree arc is created
- the range will be 0 to n (undetermined ammount)
- there will be x number of entries
- the needle will pount to a a percentage
for (int)floor((x / n) * 100)
The issue is, I have the starting pt for the needle (imagefilledarc
needs the center of the 'circle' as the starting pt, which is where
the needle will start too), but how would I get the x|y coordinates
for the end of the needle based on a perentage of a half-circle
(180 degree arc)?
Appreciate any clues or ideas.
---
Michael Geier