Drawing from a wedge rather than a rect?

[fortysixand2]

Hallooo. I'm hoping there's someone who can lend a hand with a brain squeezer I have.

I'm trying to set up a rounded gauge something like this:

http://i17.photobucket.com/albums/b73/e ... geBase.png[/img]

In-game, the red is being drawn from a seperate PNG with transparency. What I'm looking to be able to do is draw a section of the gauge based on a segment of a circle, or an angle radiating from the centre of the gauge; currently, I only know the standard Rect.new method of drawing sections of an image. To explain:

http://i17.photobucket.com/albums/b73/e ... eSmall.png[/IMG]http://i17.photobucket.com/albums/b73/earthofmine/RMXP/designexamples/SampleGaugeResultSmall.png[/IMG]
http://i17.photobucket.com/albums/b73/e ... dgeBig.png[/IMG]http://i17.photobucket.com/albums/b73/earthofmine/RMXP/designexamples/SampleGaugeResultBig.png[/IMG]

In the examples above, the left image shows the angle to be used while the right shows the resulting draw in-game.

I'm perfectly aware that this may be unfeasible, but if anyone's got any pointers at all on how to define the angled segment for drawing, it'd be immensely helpful. Thanks.

 

[SephirothSpawn]

I was trying to work on a decent algorithm for this.

It's a bit complicated, because you have to draw it a pixel at a time.

What you need to do is:

~ define your starting angel
~ define your ending angel (max angel - start angel = angel distance)
~ define major diameter
~ define max diameter

Then, the best way would probably be to pass pixel by pixel, from the negative radius value to a positive radius value, along both the x. Then pass from the top to bottom, skipping pixels in the middle. Then need to check if it is within the arc region.

I had something for this a while back. Let me dig it up and finish it. I should have finished it a long time ago anyways...