Interpolate two transformations - quarterions

[Petras_Vestartas]

Hi,

Some years ago Daniel Piker showed an example how to interpolate transformations matrices for fabrication layouts. Is that example still present somewhere or something similar? I tried to search gh forum without luck

[AndersDeleuran]

Maybe @DanielPiker him and he’ll come hopping

[TomTom (Tom)]

Hello,

you need to convert from matrix(3x3) to quaternion, then use a “slerp” function, to interpolate between two quaternions
and then convert back to matrix(3x3) again. This is just for rotation. For location simple use loc+(deltavector * t )
conversions can be found here:

http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm
http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToMatrix/index.htm
http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

be aware that quaternions can be x,y,z,w or w,x,y,z, order. Do you know how get from a rotationmatrix(3x3) to a transformationmatrix(4x4)?

[DanielPiker]

See this reply:

Code examples using quaternion for rotation?

Hi Rolf, A little late to this quaternion party, I’m not sure why you say you have to use quaternions, but not what you want to do with them - it seems a strange way round to start to me They do certainly have their uses, but depending on the problem may not be the only or best solution. Anyway, assuming this is something to do with rotation, to throw another example into the mix, I’ve included below a simple linear interpolation, and also something I did using Quaternions to inte…

[Petras_Vestartas]

Thank you very much.