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+--- Thread: Calculation of acceleration (/showthread.php?tid=1664)
Calculation of acceleration - kidice - 09-25-2012
Hi everybody,
i'm trying to calculate the acceleration of the user car in real time. I already tried the approach documented in this thread, which says to calculate the acceleration in the updateAction using velocity_delta / dt.
using body->getDeltaLinearVelocity() for the delta_velocity returns me always vector(0,0,0). Does anyone have an hint how to get delta_velocity or any other hint how to calculate the acceleration of a car in real time?
thank you in advance!
RE: Calculation of acceleration - NaN - 09-25-2012
(09-25-2012, 09:01 AM)kidice Wrote: Hi everybody,getDeltaLinearVelocity() is a bullet internal method used in the constraint solver. You have to calculate the acceleration yourself from current and previous velocity.
i'm trying to calculate the acceleration of the user car in real time. I already tried the approach documented in this thread, which says to calculate the acceleration in the updateAction using velocity_delta / dt.
using body->getDeltaLinearVelocity() for the delta_velocity returns me always vector(0,0,0). Does anyone have an hint how to get delta_velocity or any other hint how to calculate the acceleration of a car in real time?
thank you in advance!
new_velocity = body->getLinearVelocity();
acceleration = (new_velocity - old_velocity) / dt;
old_velocity = new_velocity;
RE: Calculation of acceleration - kidice - 09-26-2012
(09-25-2012, 02:53 PM)NaN Wrote: getDeltaLinearVelocity() is a bullet internal method used in the constraint solver. You have to calculate the acceleration yourself from current and previous velocity.
new_velocity = body->getLinearVelocity();
acceleration = (new_velocity - old_velocity) / dt;
old_velocity = new_velocity;
hi nan!
thank you! that piece of code worked for me. I think, I have to get more familiar with bullet
