2d-3d-conversion

Convert 2d images to 3d model

I need to display 3d sculptures in my application, but all I will have initially is 2d images of sculpture from different angles( angle and count of images is under our control) 1. Is there any library which can do that, e.g. take 8 images from all side and stitch it into a 3D model? Any opensource/commercial library/product is ok. 2. ...

Calculating which line is in front at the point where two line projections intersect

Two lines in 3d are projected onto 2d screen, and their projections intersect at a point which can be calculated. If the endpoints of the lines in 3d space are known and their intersection point in the projection plane is also known, how can I determine which line is in front at this intersection point? ...