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DS development > Drawing smoothly with the stylus
#157832 - Jeremysr - Fri May 30, 2008 5:22 am
I have a loop with | Code: |
| stylus = touchReadXY(); |
, but it seems like it only updates every vblank, so when I slide the stylus quickly it only draws a few pixels along the line. How do I make it nice and smooth? PAlib has a function for this but I don't want to use PAlib.
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#157833 - eKid - Fri May 30, 2008 5:44 am
What you want to do is draw a line from the previous stylus position to the new stylus position.
Here is a cool algorithm:
http://en.wikipedia.org/wiki/Bresenham's_line_algorithm
#157836 - Jeremysr - Fri May 30, 2008 6:14 am
Thank you, I'll try that. :)
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