绘制3D文字，输入参数str为字符串变量，用来指定文字内容，已根据需要定制字体高度。-3D rendering of text, enter a string variable str parameter to specify the text, font height has been customized according to needs.

D is the dimension vector, R the rotation matrix, T the translation vector of the calibrated volume LINKS is a [2,nLinks] adjacency list of links: if exists linkIdx such that links(:,linkIdx) == [track1 track2] then a link exists connectin