Hello everyboy, currently, I am trying to get some transformations working to display a cylinder as a line of sight. As you can see in the code below, I want to get the rotation represented by the Quaternion q into the Matrix mat, but neither preMultRotate using the quat nor multiplying as a Matrix won't give the expected results. Any ideas/clues?
I am using OpenSceneGraph 3.5.5, commit from 7.10.2016 (6142ea1d4671c18ff1cb51bc49ba74c11df0d15b) Code: osg::Vec3 dir(1,1,1); osg::Vec3 z(0,0,1); dir.normalize(); osg::Quat q = getQuaternionFromTwoVectors(z, dir); //q*z == dir.normalize() => TRUE (0.57735, 0.57735, 0.57735) osg::Matrixd MV = getModelViewmatrix(); osg::Matrixd invMV = osg::Matrix::inverse(MV); //invMV * MV * z == z => TRUE //q * (invMV * MV * z) == dir.normalize() => true osg::Matrixd mat = invMat; mat.preMultRotate(q); //mat * MV * u == dir.normalize() => false (-0.57735, -0.57735, 0.57735) instead of (0.57735, 0.57735, 0.57735) mat = osg::Matrixd(q) * mat; //mat * MV * u == dir.normalize() => false (-0.57735, -0.57735, 0.57735) instead of (0.57735, 0.57735, 0.57735) Thank you! Cheers, Michael ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=72384#72384 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
