Unity Learn : Rigidbody ( I Dont Understand This quotation )

Unity Engine
1

Hi
i don’t know
maybe cause my english is not perfect i don’t understand this quotation
i hope someone will explain it to me more easily

unity learn link : Unity - Scripting API: Rigidbody

A common problem when starting out with Rigidbodies is that the game physics appears to run in “slow motion”. This is actually due to the scale used for your models. The default gravity settings assume that one world unit corresponds to one metre of distance. With non-physical games, it doesn’t make much difference if your models are all 100 units long but when using physics, they will be treated as very large objects. If a large scale is used for objects that are supposed to be small, they will appear to fall very slowly - the physics engine thinks they are very large objects falling over very large distances. With this in mind, be sure to keep your objects more or less at their scale in real life (so a car should be about 4 units = 4 metres, for example).

Specially
this Sentence is little bit mysterious for me
With this in mind, be sure to keep your objects more or less at their scale in real life

2

When you create a car that has a length of 4.8 meters in real life, make sure it is about 4.8 units long in Unity.
The physics engine’s default are setup to mimic the real world physics as much as possible. If you don’t use sizes for your models that are about the real life sizes, it won’t feel believable.

3

And to add to that good info, which Dantus stated…
If a male human, is 2 meters tall in real life.
And you want to use physics.
Then make him 2 units tall in Unity. :smile:

4

Even using real sizing based on that, Unity physics always felt floaty to me