Basically, I draw a circle, and fill outside then inside. I assume it should be all red, but there are creepy zigzag along the circle. I got stuck. I guess it's about anti-alias stuff, and I read about the tolerance part, but still not work. Can it be done, and any recommended further reading? Thanks.
Codepen demo here
Here is my code:
Basically, I draw a circle, and fill outside then inside. I assume it should be all red, but there are creepy zigzag along the circle. I got stuck. I guess it's about anti-alias stuff, and I read about the tolerance part, but still not work. Can it be done, and any recommended further reading? Thanks. Codepen demo here