11-26-2013, 04:48 PM
Okay, when I read "you know already how to mentally construct how light hits an object" I thought "Oh no," cause that's what I'm trying to learn!
I like how you started with a simple case and started working up, and how you defined all your terms and assumptions up front. Like a science paper.
And I loved the "Colour: the correct way to spell “color.”"
I've never heard of the geometrical falloff, but it is starting to make sense.
It might help if you label your pictures under the "The beam is lighting a flat surface" with degrees, starting at 0 degrees. It actually took me a while to figure out that the 0 to 90 degrees in your 3D light source example meant 0 degrees faces light directly, 90 degrees is when the strip is parallel to light rays.
To try it in the real world, I got a little cardboard box, held it up to a light (0 degrees) and rotated it at a fairly constant angular speed to 90 degrees. Sure enough, you can see it gradually, gradually darken a bit, then all of a sudden go dark! Even though you don't speed the rotation, the darkening happens fast at the end. Learn a new thing every day!
So thank you for posting! I'd love to see the final version!
p.s. I assume you'll label the figures eventually, so they're easier to reference.
I like how you started with a simple case and started working up, and how you defined all your terms and assumptions up front. Like a science paper.
And I loved the "Colour: the correct way to spell “color.”"
I've never heard of the geometrical falloff, but it is starting to make sense.
It might help if you label your pictures under the "The beam is lighting a flat surface" with degrees, starting at 0 degrees. It actually took me a while to figure out that the 0 to 90 degrees in your 3D light source example meant 0 degrees faces light directly, 90 degrees is when the strip is parallel to light rays.
To try it in the real world, I got a little cardboard box, held it up to a light (0 degrees) and rotated it at a fairly constant angular speed to 90 degrees. Sure enough, you can see it gradually, gradually darken a bit, then all of a sudden go dark! Even though you don't speed the rotation, the darkening happens fast at the end. Learn a new thing every day!
So thank you for posting! I'd love to see the final version!
p.s. I assume you'll label the figures eventually, so they're easier to reference.
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The best time to plant a tree was 20 years ago. The second best time is now.
-Chinese proverb
Sketchbook
The best time to plant a tree was 20 years ago. The second best time is now.
-Chinese proverb
Sketchbook