Table 1 Comparison between Viraph’s and depthMapX’s calculation

Grid resolution (k)

2150

2099

2099

Unit size (AutoCAD units)

40

40.7

40.7

Average unit point diff. (δ)

-

42%

42%

Convex spaces

-

27

27

Border end points

-

70

38

E-lines

-

1356

468

Average absolute difference

-

0.045 turn (4.0°)

0.025 turn (2.2°)

Average relative difference

-

6.6%

3.6%

Percentage of +5% differing results

-

64%

22%

Percentage of +10% differing results

-

14.8%

3.5%

Ranking difference (%)

-

2.3% (50 ranks)

2.5% (55 ranks)

Calculation duration

28:10 min

7:42 min (×3.6 faster)

1:32 min (×18 faster)

Memory used

72 MB

273 MB

230 MB