CmonGirl

12-10-2010 11:02:18

hi guys.

How can i calculate vehicle speed in KM?

I have a car. Can i use velocity? Help pls.

How can i calculate vehicle speed in KM?

I have a car. Can i use velocity? Help pls.

CmonGirl

12-10-2010 11:02:18

hi guys.

How can i calculate vehicle speed in KM?

I have a car. Can i use velocity? Help pls.

How can i calculate vehicle speed in KM?

I have a car. Can i use velocity? Help pls.

betajaen

12-10-2010 11:43:57

Get the linear velocity of the Actor, which is measured in metres per second, multiply by 3.6 for it to be in KPH.

CmonGirl

12-10-2010 12:05:29

linear velocity it have 3 parameters. How i do? I try this:

But dont stable working. Help me beta

`Ogre::Quaternion CalcQuat;`

NxOgre::Quat VehQuat = mVehicle->mActor->getGlobalOrientationQuat();

CalcQuat.w = VehQuat.w;

CalcQuat.x = VehQuat.x;

CalcQuat.y = VehQuat.y;

CalcQuat.z = VehQuat.z;

Ogre::Real DirDeg = Ogre::Math::Abs(CalcQuat.getYaw().valueDegrees());

if(DirDeg > 90.0f)

DirDeg = Ogre::Math::Abs(90.0f - DirDeg);

NxOgre::Vec3 VehVel = mVehicle->mActor->getLinearVelocity();

float Velx = DirDeg * VehVel.z;

float Velz = (90 - DirDeg) * VehVel.x;

float VehSpeed = abs(Velx - Velz);

But dont stable working. Help me beta

betajaen

12-10-2010 12:37:58

Your orientation of the car has nothing to do with your velocity.

Jeez.

Jeez.

`mVehicle->mActor->getLinearVelocity() * 3.6f`

CmonGirl

12-10-2010 13:38:19

Thanks for relpy. But i can understand. velocity.x = 0 when my car move with 0 degree. But change velocity another degrees. And i need one parameter for km calculate.

betajaen

12-10-2010 13:41:29

This is it. It returns the velocity of the car in KPH.

Orientation has nothing to do with velocity, this is basic physics stuff, that you should know if your using a physics engine.

`mVehicle->mActor->getLinearVelocity().magnitude() * 3.6f`

Orientation has nothing to do with velocity, this is basic physics stuff, that you should know if your using a physics engine.

CmonGirl

12-10-2010 13:53:29

vaaaaaaav. thanks good working.Thank you very much