Indigo Ray
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Help me out here, I'm still learning. Is my math OK? And surely we can use this to erode the original height map?
 Height Slope.ffxml |
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| Posted: August 27, 2012 9:15 am | ||||||
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Indigo Ray
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I gave "erosion" a try. I know it's not realistic, but it looks cool.
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| Posted: August 28, 2012 9:20 am | ||||||
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Indigo Ray
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| Posted: August 28, 2012 9:20 am | ||||||
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Indigo Ray
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Lol what? Peanut butter?
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| Posted: August 28, 2012 9:21 am | ||||||
Skybase
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I see what you're trying to do here
 Aannnd I'm pretty darn useless when it comes to "actual math" heh |
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| Posted: August 28, 2012 9:30 am | ||||||
Sharandra
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Yummy!
can you make crunchy one aswell?
With different colors it could be all kinds of tasty things, like Nutella, pudding or cream. |
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| Posted: August 28, 2012 9:37 am | ||||||
Ghislaine
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Sweet
visit https://gisoft.ca |
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| Posted: August 28, 2012 10:08 am | ||||||
Morgantao
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That peanut butter sure looks like a mighty fine tasting filter
As for math, I try to stay away from two things: Math and Meth |
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| Posted: August 28, 2012 10:55 am | ||||||
SpaceRay
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I agree, this peanut like butter looks very good and like I could take it from the screen to my bread
I am also really very bad at math, so I admire to the ones that can handle and work easily with maths as many of you can do. |
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| Posted: August 28, 2012 1:50 pm | ||||||
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Indigo Ray
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I just don't understand you people, choosing peanut butter over math! Hmph!
Did my "orange" annotations make any sense to you? What are you unclear about math-wise? If you don't know what a "derivative" is, you should look it up, it's pretty neat. OK, I'll just assume my "angle-map" and my "steepness-map" are correct. But the "erosion" is nonsensical. And there's many different types of erosion (wind, rain, waves, glaciers, etc.), as well as materials that are more/less resistant to being eroded. Sorry Sharandra, no nutella. I'm allergic. |
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| Posted: August 29, 2012 8:46 am | ||||||
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Skybase
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Probably a bit more to it. I got what you wanted to do. I just don't know if I can comment on "erosion" part. As long as it looks like it is my word. |
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| Posted: August 29, 2012 9:03 am | ||||||
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Sharandra
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My brain has no map input for math, so for me it´s peanut butter > math  |
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| Posted: August 29, 2012 10:59 am | ||||||
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SpaceRay
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Here is another one that has a missing input in my brain for math
I may be inteligent and smart to make some other things well but not math , unless they are very simple like 4+5 or 5*6 |
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| Posted: August 29, 2012 11:42 am | ||||||
Sphinx.
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Without knowing the theoretically correct approach (if there is any), I'd say you're on right track. I ended up with this solution, which essentially produces the same result maps as yours, but more precise and simpler approach..
For the erosion part you need to iterate somehow and "distribute sediments". This may be cheated with blur/smudge/maximum and then combined with original map in a smart way (by inspecting slope and elevation).. I am not sure exactly how Elevation - Angle - Slope.ffxml |
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| Posted: August 29, 2012 2:56 pm | ||||||
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Morgantao
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Sphinx, I don't know what you were trying to prove here, but I think there are easier ways to make a circle |
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| Posted: August 29, 2012 4:03 pm | ||||||
| David Roberson |
Indigo Ray, I don't know if you still hit the forums, so this is sort of an open question I hope someone can answer. If derivatives can be used to create normals, is it possible for an antiderivative function to turn a normal (or equivalent x, y lookups) back into a height map? I would like to know before I try to dig into calculus in search of a method. |
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| Posted: August 11, 2022 2:08 am | ||||||
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Indigo Ray
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You rang?
An "anti-derivative" is also known as an "integral" (that scary squiggly symbol), and yes there is a way to do this in Filter Forge, using the Motion Blur. Hmm... I want to say maybe Inujima or Sphinx posted this solution. Anyway, I'm attaching it here. Integral.ffxml |
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| Posted: August 15, 2022 6:41 pm | ||||||
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Indigo Ray
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| Posted: August 15, 2022 6:56 pm | ||||||
| David Roberson |
Thanks, Indigo! The next thing I'm hoping to work out is a way to do Ambient Occlusion (probably as a script) for use within the editor. I do wish AO was a component instead of a part of external Lighting. |
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| Posted: August 16, 2022 1:09 am | ||||||
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