light intensity area x1 y1 z1 x2 y2 z2 Usamp x3 y3 z3 Vsamp
Area lights are numerous (Usamp x Vsamp) point lights arranged within the area defined by (x1 y1 z1) - (x2 y2 z2) - (x3 y3 z3). Scenes using these lights can be a long time to render because "complete lighting calculations" are performed for each point light (Rayshade User's Guide, section 4.1).
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THE END - Notes on Rayshade - 3 - Lighting and Atmospheric Effects - Area Light
Figure 3-2
/*
area.ray
Area Light Example
Stephen Peter 14 Feb 93
*/
eyep 11.25 -6.72 5
lookp 5 2 1.5
screen 300 200
background .9 .9 .9
light 1 area -5 0 3 0 5 3 8 -5 0 6 4
surface aqua
ambient 0.0 0.2 0.2
diffuse 0.2 0.8 0.8
specular 0.3 0.3 0.3
reflect 0.5
surface salmon
ambient 0.2 0.1 0.1
diffuse 1.0 0.5 0.44
specular 0.3 0.3 0.3
reflect 0.6
box aqua -5 -5 -1 10 15 0 /* base */
name shape
list
box -1 -1 0 1 1 1
cylinder 0.5 -0.5 0 1 -0.5 0 4
disc 0.5 -0.5 0 4 0 0 1
end
object salmon shape translate 5 0 0
object salmon shape translate 4 3 0
object salmon shape translate 3 6 0
Go to next section: Directional Light.