Displacement of the car when turning its wheels

Questions
1

Playground: https://www.babylonjs-playground.com/#AYD85K#18

Explain to me please. Why, if I reduce the scaling vector of the machine even by 0.1 x, y, z, and then when turning the wheels the car starts to shift strongly along the x?

 car.scaling = new BABYLON.Vector3(1, 1, 1);
2

Scaling affects the local space of the machine, so with a scaling of 0.9 and doing:

car.translate(BABYLON.Axis.X, NR - R, BABYLON.Space.LOCAL);

NR - R will be scaled by 0.9 as well.

3

And if I want the final vector 0.5, 0.5, 0.5. Should I multiply the difference (NR -R) by 0.125?

4

You can do (NR - R) / car.scaling.x for translating in the X-axis

5

I tried to write as you said, but the car still moves when turning

6

It works for me (only changing the car.translate parameter):

https://www.babylonjs-playground.com/#AYD85K#20

2 Likes
7

Nice, but why should I divide the difference only in the displacement of the machine itself, but there is no pivot?

8

Because the scaling of the pivot is still (1, 1, 1), it’s only the local space of the machine that has been affected

1 Like