Bar graphs, any way to make fill rec, go from bottom to top rather then top to bottom

[voidflux]

Hello everyone, i'm writing a graphing application (vertical bars). My problem is, when I do the following:

g.fillRect(115,300,20,30);

it will draw the bar, but its upside down. Because its using 300 as the y axis, and 115 as the x axis then the 30 will make it grow downwards from the orginal point, (115,300);

My x axis line is at 300, I used drawLine to draw the x and y axis.
so i'm getting somthing like this:

-------------------------------------------------- x axis
| |
| |
| |
----

ANy idea how i can make it right side up?


Or maybe i'm approaching this totally wrong


Thanks for listening

[CornedBee]

The y axis goes from top to bottom, that's just the way computers work, I'm afraid. You have to do the calculations somewhere.
There are a few ways. For example, I think it's possible to flip and offset the coordinate system of a Graphics so that you can use a proper mathematical system. Or you could just do the calculations on the coordinates yourself.

[voidflux]

Thanks for the responce, I checked out the Graphics class, and I couldn't find anything, i did find translate, but I think that just centers your graph if you resize the screen. Did you know of the function name off the top of your head to invert and offest the coordinate system?

Thanks!