How many pixels are in a fixed time step game loop?
If units are pixels, then between this frame and the last, the visual representation of the object moved less than 2 pixels. The next frame, it will again move less than 2 pixels. And so on, until after 60 frames, or 1 second, the object has moved 100 pixels.
When to use semi fixed timestep in games?
Semi-fixed timestep It’s much more realistic to say that your simulation is well behaved only if delta time is less than or equal to some maximum value. This is usually significantly easier in practice than attempting to make your simulation bulletproof at a wide range of delta time values.
How many times does a fixed time step update?
The logical update rate of the fixed timestep is set to, say, 15 updates per second. (I know of older RTS games that used low rates like this, due to the sheer amount of logical processing). So if the object will update exactly 15 times per second, then an object moving 100 units per second will move 100/15, or 6.66667 pixels per step.
How many units in a time step loop?
That means at a given update, 1/60th of a second has elapsed. Thus, this time through the loop, the object will have moved 100 units/sec * 1/60 sec = 100/60 units = 1/66667 units. If units are pixels, then between this frame and the last, the visual representation of the object moved less than 2 pixels.
When to use fixed time step in Unity?
As shown above, when the framerate is extremely low, Unity will limit the amount of time by which it advances the game simulation, capping at 17 FixedUpdate iterations with the default settings.
Can You interpolate logic from fixed steps?
Interpolating in Logic from fixed steps has almost the same effects as using variable frame rate (instead of fixed). All of this applies to Physics as well (which is the main point of Gaffer’s article), but physics engines have the additional problem that simulations become unstable and the “bullet through paper” problem