Irrlicht Engine

Posted: **Thu Apr 23, 2009 6:00 pm**

If I want to rotate a model interpThisTickRotation degrees around the Y axis, is this the right way to do it?

core::matrix4 modelTransformation = model->getRelativeTransformation();
core::matrix4 rotationMat;
rotationMat.setRotationDegrees(core::vector3df(0,interpThisTickRotation,0));
modelTransformation*=rotationMat;
model->setRotation(modelTransformation.getRotationDegrees());

Posted: **Thu Apr 23, 2009 11:52 pm**

i dont understand, why you just dont use setRotation?

model->setRotation(vector3df(0,interpThisTickRotation,0));

is it too easy? xD

Posted: **Fri Apr 24, 2009 1:40 am**

That sets the absolute rotation. I want to rotate by a certain amount.

Posted: **Fri Apr 24, 2009 2:07 am**

Here it is:

Code: Select all

model->setRotation(model->getRotation()+core::vector3df(0,interpThisTickRotation,0));

I'm used to other engines where you have to do the low-level math on everything.

Posted: **Fri Apr 24, 2009 3:57 pm**

no.. setRotation() sets the rotation relative to the parent... not absolutely

Posted: **Fri Apr 24, 2009 6:02 pm**

I think this is a mis-understanding. By absolute, rakkar meant not-incrementing, which is just as correct as your statement. However, the method name setRotation does already hint for the fact that it's not accumulating, otherwise it would be "rotate" or "addRotation".

Irrlicht Engine

Rotating a model

Rotating a model