March 2017
Intermediate to advanced
480 pages
11h 3m
English
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Circle to rectangle
We can simplify the problem of determining if a circle and rectangle intersect down to testing if a point is contained within a circle. We can do this by finding the Closest Point to the circle on the rectangle.
To find the closest point on the rectangle to the circle, if the position of the circle is outside the range of the rectangle on any axis, we clamp that point to the edge of the rectangle. The resulting point is guaranteed to be on the rectangle. If this point is inside the circle, we know a collision has happened.
If the center point of the circle was inside of the rectangle, it is treated as the closest point. In this case, the distance between the position of the circle and the closest point will be zero:
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.