public void ApplyGravityTo(IGravityReceivingEntity entity)
{
GravityReceiving gravity = entity.GravityReceiver;
if (gravity.IsEnabled)
{
IPhysicable receivingPhysics = entity.Physics;
Vector2 delta = this.emittingPhysics.Center - receivingPhysics.Center;
float distance = delta.SquaredLength;
if (distance != 0.0f)
{
float strength = CalculateGravityStrength(distance, gravity, receivingPhysics);
Vector2 force = delta.Direction * strength;
receivingPhysics.ApplyForce(force);
}
}
}
private float CalculateGravityStrength(float squaredDistanceBetweenEmitterAndReceiver, GravityReceiving gravityReceiving, IPhysicable receivingPhysics)
{
float factor = gravityReceiving.Factor * 0.001f;
float strength = factor * ((this.emittingPhysics.Mass * receivingPhysics.Mass) / squaredDistanceBetweenEmitterAndReceiver);
return(strength);
}