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Asked by Havin_it in Math & Science, Algorithms, PHP Scripting Language
Hi,
I've made a scheduling tool with PHP that displays appointments of varying times and durations for a given day as horizontal spans across a containing box of fixed width. Each span's left-margin and width are calculated from the start and end times of the item as a percentage of the box's width, so they match up with a 24-hour scale along the bottom of the box.
In practice, the hours between midnight and 9am almost never have any content (apart from items that are continued from a previous day). I thought it might look better if I could alter the scale of the box, so the hours before 9am are much less wide than the rest of the day. (Midnight-9am would span just about 10% of the box instead of 33%)
The tricky bit is how to correctly calculate the dimensions of the items against this sliding scale. What I'm looking for is a function that'll take a floating-point value (basically the time in hours and minutes divided by 24 hours) and return a value that gives the correct position on the scale. The returned value relative to the argument value will be less if before 9am and more if after.
Did that make any sense? It seems like a job for applied maths, but I did very poorly in this subject at school and can't begin to conceptualise it. Any help would be appreciated.
20090824-EE-VQP-74 / EE_QW_2_20070628
