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What does it mean to have framerate independent motion?
Framerate independent motion is when objects in your game move based on some criteria other than which rendering frame you are on. Typically this alternate criteria is the delta time since the last update. A game loop that is framerate-dependant might look like this:
What happens if your framerate increases or decreases?
However, if your framerate increases or decreases, the rate at which objects update increases or decreases as well. Typically this is undesirable because the wall-clock time (that is, real time) is still exactly the same, so the user perceives the game objects moving much slower or much faster.
How often do objects update in the loop?
In this loop, if your game runs at 60 frames per second, every object is also updated 60 times per second. However, if your framerate increases or decreases, the rate at which objects update increases or decreases as well.
How does a framerate independent game work?
A framerate independent game progresses at the same speed on both computers (objects appear to move at the same speed). On the other hand, a framerate dependent game progresses at half the speed on the slow computer, in a sort of slow-motion effect.
How does Delta time and framerate independence work?
The same technique also enables time scaling, which allows for deliberate slow-motion effects and easy pausing. The key to framerate independence is the dt system expression. dt stands for delta-time. Delta means a change in a quantity, so delta-time means the change in time. It is the time, in seconds, since the last tick.
Can a car collision happen with a scooter?
Of course, those collisions aren’t just with other cars; they can happen with people who are walking, biking, or scooting as well. Here are a few tips for safe travel in busy areas:
When does drowsy driving lead to a collision?
Drowsy driving is harder to measure than other collision factors, but the NHTSA estimated that 795 deaths were caused by fatigued driving in 2017. Most of these crashes occur at certain times of day: between midnight and 6 a.m. and in the late afternoon, when many people experience a slowing in their circadian rhythm.