"Directional" light and ImageScaled coordinates (a bug?)
- To: mathgroup at smc.vnet.net
- Subject: [mg129352] "Directional" light and ImageScaled coordinates (a bug?)
- From: Alexey Popkov <lehin.p at gmail.com>
- Date: Mon, 7 Jan 2013 00:38:14 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- Delivered-to: l-mathgroup@wolfram.com
- Delivered-to: mathgroup-newout@smc.vnet.net
- Delivered-to: mathgroup-newsend@smc.vnet.net
It seems that "Directional" light specification with the direction of the
light specified by a vector defined by two points
{"Directional", col, {pt1, pt2}}
ignores the second point 'pt2' when ImageScaled coordinates are used.
Compare:
Graphics3D[{White, Sphere[]},
Lighting -> {{"Directional", Green, ImageScaled[{0, 0, 1}]}}]
Graphics3D[{White, Sphere[]},
Lighting -> {{"Directional",
Green, {ImageScaled[{0, 0, 1}], ImageScaled[{0, 0, 0}]}}}]
Graphics3D[{White, Sphere[]},
Lighting -> {{"Directional",
Green, {ImageScaled[{0, 0, 1}], ImageScaled[{1, 0, 1}]}}}]
I see no difference between the outputs from above in the version 9.0.0. Is
it a bug?
Sincerely,
Alexey Popkov