Rays and Intersections
The way we prevent our avatar from walking through trees is actually quite simple. Imagine an arrow pointing down from our avatar.
In geometry, we call an arrow point a ray. A ray is what you get when you start in one place and point in a direction. In this case, the place is where our avatar is and the direction is down. Sometimes giving names to such simple ideas seems silly, but it’s important for programmers to know these names.
Programmers Like to Give Fancy Names to Simple Ideas | |
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Knowing the names for simple concepts ... |
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