The tregenzadist function determines the nearest neighbour patches and the angular distance to a given tregenza hemisphere patch.
Usage:
[p,d] = tregenzadist(patch,n,not)
Where:
| Parameter | Description |
p | Is a vector containing the nearest neighbour patches in ascending order. |
d | Is a vector containing the corresponing angular distance to the given patch in ascending order. |
patch | Defines the Tregenza patch on the hemisphere, scalar. |
n | Defines the number of returned patches, scalar. Maximum value = 144. |
not | Defines patches that should be excluded, vector. |
Examples
Determine the 6 nearest neighbours in ascending order of Tregenza patch 35:
tregenzadist(35,6)
Result:
ans = 34 36 26 81 25 27
Determine the 6 nearest neighbours in ascending order of Tregenza patch 35 excluding patch 36:
tregenzadist(35,6,36) plottregenza(1:145,'w')
See also: plottregenza
Result:
ans = 34 26 81 25 27 80
Determine the 5 nearest neighbours in ascending order of Tregenza patch 118 and the according angular distance:
[p,d] = tregenzadist(118,5)
See also: plottregenza
Result:
p =
117
119
96
132
95
d =
11.716
11.716
12.000
12.000
15.578
Reference:
Subdivision of the sky hemisphere for luminance measurements. In: Lighting Research and Technology, vol. 19, no. 1, pp. 13-14, 1987, (DOI: 10.1177/096032718701900103).