Strange gravity behavior

[Myjestic]

Hi together.

I toke a look at David Rousset QR Maze and tried to understand how babylon.js works and tried to optimize some code.

I came across some strange behavior with the gravity property.

scene.enablePhysics(new BABYLON.Vector3(0, 0, 0));
scene.gravity = new BABYLON.Vector3(0, -0.8, 0);
scene.collisionsEnabled = true;

As you can see, the gravitiy in ground direction is set to -0.8.

If I walk through the maze gravity is working. I am on 55fps. If I look onto the ground and move backwards nothing happens. So it should be,

I am working on a laptop and can switch it to low power consumption. The CPU and GPU than works on less power.

The frame rate drops to 25 fps.

Now if I do the some like mentioned above (looking down and walking back) and I am flying away from the ground.

 

The question is, why low fps affects the gravity of the scene?

If I set the gravity to -10 everthing is okay on both fps situations.

[Dad72]

Did you try like this and see if it's better:

scene.enablePhysics(new BABYLON.Vector3(0, -0.8, 0));
scene.collisionsEnabled = true;

The first parameter of enablePhysics is gravity

[Myjestic]

If you'd ever get anything right, it would work.

Thanks a lot Dad72.

[RaananW]

I like wondering out loud.

In this case I wonder - how would the physics gravity, which you don't need in your case, affect the collision gravity? They are two different systems. Care to share your scene? Or a simplified version of it?

 

[Myjestic]

You can find the complete code under this Link.

The scenery is build in file ../scripts/coding4fun.js