# sevenfold1

Member

54

170 Neutral

• Rank
Member
1. ## Downsizing normal maps

That is simply untrue.  It takes over 5 seconds to write a large 4096 x 4096 compressed PNG using libpng.
2. ## Downsizing normal maps

Speed tradeoff.  Uncompressed format is of course the fastest way to read/write.
3. ## Bin packing

Blocks are first sorted by height, so you will never insert a smaller block before a larger block. If insertion fails, then you may have to re-initialized it with a slightly larger tree, and start over again.

This is a very good article to read. It talks about fast and efficient dilation algorithms. Includes pseudo code too: http://blog.ostermiller.org/dilate-and-erode
5. ## Trumps great wall... will it ever happen?

I think it's just a ploy.  Trump needs a reason to stay in power for 8 long years, and it's going to take a long time to build a wall across the entire California + Arizona + New Mexico + Texas border.  4 states!  That's an insane waste of money, time, and resources.
6. ## This is a joke! (US Presidential Election Thread)

The American people were given a choice, one that doesn't come up very often.  To choose between a politician or a celebrity.  They chose a celebrity. Celebrities outrank politicians 10 to 1 in their popularity. You would never think Arnold Schwarzenegger, of Terminator fame, would be future governor of California for 8 years?  Ronald Reagan was also a celebrity, a Hollywood B-actor.  He was President for 8 years.  Hell, the American people are so enamored with celebrities, they would pick Bill Gates, Tim Cook, or even Kayne West as president.     Based on that, I will make a predication that Trump will be President for 8 long, disgusting years.
7. ## Shape interpolation?

From the docs: "For this technique to work, the two models you are morphing between must have identical vertex counts, and the vertices must correspond to each other." Thanks, but my main issue is that I need to first establish a correspondence between two different sets of vertices. After that, everything becomes simple.
8. ## Shape interpolation?

Sorry, this isn't a visual effect, so I can't use any hacks. It's a general application of mesh processing. It has to be a real morph. I'm trying to morph two humanoid figures, so they do share similar features. I was thinking about projecting both meshes to an unit sphere, but I'm not sure how to match up vertices where the triangles overlap (caused by cavities around the nose, mouth, ears, fingers, etc..). Overlapping triangles would give multiple vertex matches. Is it really necessary to map each mesh to a domain where triangles don't overlap?
9. ## Shape interpolation?

Thanks, I think spherical parameterization might help here. But I need to research it a bit more. Might have problems with overlapping faces. I think if the points get smoothed out, the similarities between the two meshes will get lost. If I have to smooth out the points, I would also like to preserve symmetry as well. Is it possible to pin two points (say the poles) to preserve symmetry, or at least pin one point to maintain a point of reference?
10. ## Shape interpolation?

Does anyone know of a 3D modelling program or open-source library that can take two arbitrarily shaped 3D meshes, that don't necessarily have the same vertex counts, and transform one mesh into the other, without adding or removing vertices? I would not specifically call it mesh morphing, as I think that requires a 1:1 mapping of vertices, although its related. But, anyway, I would like to find something that works, rather than try to write it myself. The math involved may be over my head. I would like to morph one mesh into another, but before I can do that, I need to create some kind of mapping that says this vertex morphs into that vertex, and so forth.
11. ## OpenGL Efficient resource manager for OpenGL in C++?

OpenGL has no audio capabilities.  You need a 3rd party library to handle sounds.
12. ## OpenGL Vulkan is Next-Gen OpenGL

What about the end user who never updates their graphics driver? Will my program fail to run if no Vulcan driver found?
13. ## OpenGL Vulkan is Next-Gen OpenGL

Maybe I missed it, but how will Vulcan get installed on my computer? Will the drivers come straight from nVidia? Is that a requirement?
14. ## How do you pronounce 'ptr'?

The guy is Canadian. He says the word "array" like "a-ray" and not "air-ray". That's how Canadians speak, eh? :)
15. ## Flowing water is indeed in Mars.

There is no drinkable water on Mars. It's filled with brine, which is just another word for salt water. So, I hope you enjoy drinking salt for breakfast, lunch, and dinner. Tasty.