My modelview matrix is currently:
1 0 0 0
0 cos45 -sin45 0
0 sin45 cos45 0
0 0 0 0
Now I call glTranslate(0,2,0) and multiply the above matrix with the below one.
1000
0101
0010
0001
I can figure out the first 3x3 block which is just
1 0 0
0 cos45 -sin45 0
0 sin45 cos45 0
But how do I figure out the right most column ( the translation values)