A system and method for implicitly computing signed distance values in a
graphics application. In one embodiment, rather than storing numerous
distance values along a given raster scan line, only two values are
stored for each interval defining the intersection of the raster scan
line with the shape. These two values represent the interior of the
object to be rendered along a given grid line. In another embodiment each
grid line may be parameterized (e.g., from 0 to 1). Each intersection
interval may then be represented by the parameter value at an entry point
of the surface and an exit point of the surface, along the given grid
line.