Limitation in Physics Engine Speed
FrostyFlame1 opened this issue · comments
Is there an existing issue for this?
- I have searched the existing issues
Describe the bug
The physics engine locks the speed of a moving object, in this case a ball, with a max speed of 1200. This means that even when setting a high timescale for the scene, physics objects are calculated separately and never travel faster than 1200 pixels per second.
This limitation could potentially hinder creativity and limit the possibilities of what we can achieve with GDevelop. Furthermore, this speed limit implies that the testing of games, especially for bugs, could take longer.
Steps to reproduce
link of the game: https://gdevelop.io/game-example/free/spherez
GDevelop platform
Desktop
GDevelop version
5.3.195
Platform info
No response
Additional context
No response
This is a limitation of Box2D:
Units in Box2D are tuned to be meters, so at a typical framerate of 60Hz a body covering 2 units per timestep is moving at 120 m/s
https://www.iforce2d.net/b2dtut/gotchas#speedlimit
Don't worry, there is an easy way to make the objects in your game move faster! Edit scene properties and change scale from 100 (this is why it moves 1200 pixels/second) to a higher value, such as 200 (this would go a max speed of 2400 pixels a second).
The only downsides to that change are:
- Existing forces (including gravity) will need to be adjusted as everything will move faster
- Collisions with a low velocity (like a glancing blow) are less likely to bounce away, and instead stick to the surface