lxq100
March 1, 2024, 8:08am
1
code
If not provided, the physics engine will compute an appropriate value.
I want to know how this value is calculated. I need codes
Cedric
March 1, 2024, 10:41am
2
Mass properties are computed here :
break;
case PhysicsActivationControl.ALWAYS_INACTIVE:
this._hknp.HP_Body_SetActivationControl(body._pluginData.hpBodyId, this._hknp.ActivationControl.ALWAYS_INACTIVE);
break;
case PhysicsActivationControl.SIMULATION_CONTROLLED:
this._hknp.HP_Body_SetActivationControl(body._pluginData.hpBodyId, this._hknp.ActivationControl.SIMULATION_CONTROLLED);
break;
}
}
private _internalComputeMassProperties(pluginData: BodyPluginData): any[] {
const shapeRes = this._hknp.HP_Body_GetShape(pluginData.hpBodyId);
if (shapeRes[0] == this._hknp.Result.RESULT_OK) {
const shapeMass = this._hknp.HP_Shape_BuildMassProperties(shapeRes[1]);
if (shapeMass[0] == this._hknp.Result.RESULT_OK) {
return shapeMass[1];
}
}
// Failed; return a unit inertia
return [[0, 0, 0], 1, [1, 1, 1], [0, 0, 0, 1]];
You can change default density of a shape with
restitutionCombine: this._nativeToMaterialCombine(hkMaterial[4]),
};
}
/**
* Sets the density of a physics shape.
* @param shape - The physics shape to set the density of.
* @param density - The density to set.
*
*/
public setDensity(shape: PhysicsShape, density: number): void {
this._hknp.HP_Shape_SetDensity(shape._pluginData, density);
}
/**
* Calculates the density of a given physics shape.
*
* @param shape - The physics shape to calculate the density of.
* @returns The density of the given physics shape.
*
*/
lxq100
March 2, 2024, 7:44am
3
If I set mass=20、 centerOfMass==[0,-0.5, 0] and inertia=[1,0,1].
Cedric
March 4, 2024, 11:00am
4
Defaults values are computed and are then overriden by what user provides :
