Lock transformation of rigid body on axis

[kwitee]

Hi,
I am developing a simple game using Irrlicht for graphic and Newton for physic. I want to lock rotation of rigid body on some axis, so it doesn´t flip over. I tried to set very high inertia vector for that body, it became harder to rotate, but it is still possible.
I hope I posted it to right forum.

[JernejL]

It is possible to do it with a "upvector" joint.

[kwitee]

Thanks for reply, but now I am confused. Can you show me link to newton wiki or a few lines of code how to do this? I am new to newton.

I found my own solution:

Code: Select all

CMatrix4<f32> matrix; // irrlicht 4x4 matrix
NewtonBodyGetMatrix(body,matrix.pointer()); // get the matrix
mat.setRotationDegrees(vector3df(0.0f,0.0f,0.0f)); // set rotation of matrix to 0,0,0
NewtonBodySetMatrix(body,matrix.pointer()); // put the changed matrix back


I put this in my SetMeshTransformCallback, but it is not 100% OK I think

[JernejL]

see: NewtonConstraintCreateUpVector