Matrix rotation of unit cube
I have managed to get the cube to rotate about the z and x axes, by applying the appropriate matrix to a single point, then using the 'cube' tool from the drop-down menus. (CubeRz and CubeRx) but trying the same process about the y axis (b=1) the cube suddenly jumps to the wrong position for theta>180.
I could rotate 4 vertices and construct the cube, but it's a lot of commands!
I hoped I could use Applymatrix(Matrix,cube) but cube is not accepted as an object, as far as I can see.
I have also tried to use cube(...) in the input line, but keep getting an error message.
I know there is an inbuilt command, Rotate(), but my students have to know the matrix operations.
What am I doing wrong? Thx!
PS I notice my GGb 5 dates from March (although I did start this on-line) so I will try updating it!