Blender Aim the Cam

To make one or more objects track another object (the target) select at least two objects and press CtrlT. The active object becomes the target and the others objects the trackers. The (Make Track Menu) provides several options for creating the initial tracking:

http://wiki.blender.org/index.php/Doc:Manual/Modelling/Objects/Tracking

Read vertex cordinates in Blender3D

Blender can be used to read the coordinates of a desired vertex off a 3D model (Ex: 3ds)

1) Zoom in to the desired area (scroll button = zoom, middle drag = rotate, shift+middle = pan)
2) 'Tab' to enter 'edit' mode
3) Right click desired vertex
4) 'n' to see vertex coordinates