D3DXQuaternionSlerp ???

Graphics and GPU Programming Programming

Started by Crazy Chicken June 07, 2004 07:32 PM

1 comment, last by Crazy Chicken 19 years, 10 months ago

122

Author

June 07, 2004 07:32 PM

Hi I am currently working on my 3rd person camera for my game. I am especially keen to get my camera to rotate smoothly using quaternion interpolation. Can someone please explain the "D3DXQuaternionSlerp" function to me and how I would have to use it to rotate between two orientations. msdn link: http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/directx9_c/directx/graphics/reference/d3dx/functions/math/d3dxquaternionslerp.asp Thanks !!!! Luke

circlesoft

1,178

June 07, 2004 11:00 PM

All D3DXQuaternionSlerp does is interpolate between two quaternions, based on a timestep value you give it. This timestep should be between 0.0f and 1.0f, and the closer you get to 1.0, the closer the resulting quaternion is to the 2nd quaternion. Here is a sample:

//quatNew is the quaternion created by this interpolation//quatOne is the first quaternion//quatTwo is the second quaternionD3DXQuaternionSlerp( &quatNew, &quatOne, &quatTwo, 0.5f );