Center of mass (DEF-3940)

[britzl]

Would be great to have methods for working with the center of mass of the object.
Requests:
(LINK REMOVED)(LINK REMOVED)
2019-05-13 15:58:12 (alexey.gulev)
Box2d has next methods (b2body.h):
/// Get the mass data of the body.
/// @return a struct containing the mass, inertia and center of the body.
void GetMassData(b2MassData* data) const;

/// Set the mass properties to override the mass properties of the fixtures.
/// Note that this changes the center of mass position.
/// Note that creating or destroying fixtures can also alter the mass.
/// This function has no effect if the body isn't dynamic.
/// @param massData the mass properties.
void SetMassData(const b2MassData* data);

/// This resets the mass properties to the sum of the mass properties of the fixtures.
/// This normally does not need to be called unless you called SetMassData to override
/// the mass and you later want to reset the mass.
void ResetMassData();

2019-05-20 16:58:35 (alexey.gulev)
It seems like something related to Bullet3d center of mass:
(LINK REMOVED)If not, Could we implement those methods only for 2d physics?

[zarkua]

In my game, I am forced to create six collision objects in a single game object (GO) due to the absence of a method to manipulate the center of mass for physics objects.

Having the ability to work with the center of mass as described in this issue would greatly enhance the efficiency and functionality of my game development process. Implementing methods for manipulating the center of mass, as in Box2D (GetMassData, SetMassData, and ResetMassData), would be incredibly beneficial.

This feature is crucial for the specific mechanics of my game, and its absence complicates the development process significantly. I hope this feature can be prioritized as it will not only aid in my current project but will also be a valuable addition for many other developers working with physics in Defold.

[britzl]

https://forum.defold.com/t/get-center-of-mass-for-collision-object/45349