Dilution of precision (computer graphics)
Encyclopedia
Dilution of precision is an algorithmic trick used to handle difficult problems in hidden line removal
, caused when horizontal and vertical edges lay on top of each other due to numerical instability. Numerically, the severity escalates when a CAD model is viewed along the principal axii or when a geometric form is viewed end-on. The trick is to alter the view vector by a small amount, thereby hiding the flaws. Unfortunately, this mathematical modification introduces new issues of its own, namely that the exact nature of the original problem has been destroyed, and visible artifacts of this kludge
will continue to haunt the algorithm. One such issue is that edges that were well defined and hidden will now be problematic. Another common issue is that the bottom edges on circles viewed end-on will often become visible and propagate their visibility throughout the problem.
Hidden line removal
Hidden line removal is an extension of wireframe model rendering where lines covered by surfaces are not drawn.This is not the same as hidden face removal since this involves depth and occlusion while the other involves normals....
, caused when horizontal and vertical edges lay on top of each other due to numerical instability. Numerically, the severity escalates when a CAD model is viewed along the principal axii or when a geometric form is viewed end-on. The trick is to alter the view vector by a small amount, thereby hiding the flaws. Unfortunately, this mathematical modification introduces new issues of its own, namely that the exact nature of the original problem has been destroyed, and visible artifacts of this kludge
Kludge
A kludge is a workaround, a quick-and-dirty solution, a clumsy or inelegant, yet effective, solution to a problem, typically using parts that are cobbled together...
will continue to haunt the algorithm. One such issue is that edges that were well defined and hidden will now be problematic. Another common issue is that the bottom edges on circles viewed end-on will often become visible and propagate their visibility throughout the problem.