New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Anticlockwise arcs from 0 to 2π are not rendered. #2

Open

eendeego opened this issue Oct 25, 2012 · 1 comment

Labels

Owner

eendeego commented Oct 25, 2012

Browsers implement this by drawing a full circle.

Can't find info on the Canvas spec on this kind of values. Note that going from 0 to 2π in a anticlockwise direction is strange because:

startAngle should be greater than endAngle
adding 2π to startAngle would result in a 2π to 2π arc => Zero extent
subtracting 2π from endAngle would result in a 0 to 0 arc => Zero extent

This is clearly a special case. So, are -4π, -2π, 4π also special cases ?

Owner Author

eendeego commented Jan 2, 2013

Add a reference / example with angles going toward 2π and further.

eendeego added a commit that referenced this issue


          Review globalAlpha example. It wasn't working due to issue #2. Fixes #6.

38a70b2

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment