Ogre Forums

Posted: **Sat Feb 05, 2005 4:08 am**

Is there an Ogre::Vector3::Slerp or equivelent? Or is there another method?

My goal is to "slerp" (correct) a network player position. The Ogre::Quaternian::slerp works great for this, I am not sure how I would do it with a Vector3.

Not being a math guru, and from what I thought I understand of Quats, I thought I could do it with a quat by flipping "w" but that was a no good. However, on the flip side I figure out how to distort an image.

Posted: **Sat Feb 05, 2005 4:38 pm**

Slerp means 'spherical linear interpolation' so it has no relevance to Vector3. You just mean 'lerp', which is a simple case of linearly interpolating the components of the vector.

Posted: **Sat Feb 05, 2005 4:42 pm**

Sometimes I make things more difficult than they are...

For future readers:

Code: Select all


// simple linear interpolation between two points
Ogre::Vector3 lerp (Ogre::Vector3 &srcLocation, Ogre::Vector3 &destLocation, Ogre::Real Time)
{
  Ogre::Vector3 mDest; 
  mDest.x = srcLocation.x + (destLocation.x - srcLocation.x) * Time;
  mDest.y = srcLocation.y + (destLocation.y - srcLocation.y) * Time;
  mDest.z = srcLocation.z + (destLocation.z - srcLocation.z) * Time;
  return mDest;
}

or put simply

Code: Select all


Ogre::Vector3 lerp (Ogre::Vector3 &srcLocation, Ogre::Vector3 &destLocation, Ogre::Real Time)
{

  return srcLocation + (destLocation - srcLocation) * Time;
}

Ogre Forums

Ogre::Vector3::Slerp ??

Ogre::Vector3::Slerp ??