centering

n 1: the concentration of attention or energy on something; "the

focus of activity shifted to molecular biology" [syn: {focus},

{focusing}, {focussing}]

2: (football) putting the ball in play by passing it (between

the legs) to a back [syn: {snap}]

rendering

Generation of a graphical image from a mathematical model of a

three-dimensional object or scene. A common method is

{ray-tracing}.