Translate and Rotate a Node in the World Coordinates

[renato.semadeni]

Hi there

 

I'm trying the change the origin and orientation of an object. It worked fine until I decided to include as well the orientation of the node.

 

I started with the following approach:

//
// Didn't work - it could only take one of the two transformations
UNIGINE_MAT4 apMat = nPtr->getWorldTransform();
apMat.setTranslate(UNIGINE_VEC3(ap.getLat(), ap.getLon(), ap.getAlt()));
apMat.setRotateZ(ap.getRotZ());

But as result, my node changed only in the applied rotation.

 

With my second approach, it works... Is this a bug or do I missunderstand the theorie?

UNIGINE_MAT4 apMat = nPtr->getWorldTransform();
apMat.setRotateZ(ap.getRotZ());
apMat.setColumn3(3, UNIGINE_VEC3(ap.getLat(), ap.getLon(), ap.getAlt()));
nPtr->setWorldTransform(apMat);

Kind regards,

Renato

[unclebob]

Hi Renato!

 

setRotate, setTranslate functions will reset current matrix data, so you need to do multiply translation matrix by rotation. But you did much better and faster way. :)