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Eric Arnebäck @erkaman2
, 15 tweets, 5 min read Read on Twitter
All right guys! Let's start posting and sharing links useful
for guys who want to get into physical simulation in computer graphics!!!
I'll start below!!!
For getting into fluid simulation, I think Smoothed Particle Hydrodynamics is the easiest way. A great thesis about this:
image.diku.dk/projects/media…
Harada's classic paper for SPH on GPU:
inf.ufrgs.br/cgi2007/cd_cgi…
although based on a pretty old OpenGL version.
Newer blog post by @turanszkij about SPH on GPU:
turanszkij.wordpress.com/2018/05/21/sca…
Great old GPU gem for 2D fluid simulation on GPU, by solving
Navier Stokes Equations:
developer.download.nvidia.com/books/HTML/gpu…
Another good intro to fluid simulation, with WebGL demos!
jamie-wong.com/2016/08/05/web…
The math mostly useful for fluid simulations is Partial Differential Equations IMO.
Focus on studying this.
See chapter 16 of below for a good treatment of numerical methods for PDEs.
people.csail.mit.edu/jsolomon/share…
Classic book about fluid simulations
amazon.com/Fluid-Simulati…
although it's not an easy read, and uses more advanced methods than other tutorials.
Heard very good things about this book, although never read it:
fluidenginedevelopment.org
The classic paper by Muller on Position Based dynamics is
also strongly recommended:
matthias-mueller-fischer.ch/publications/p…
Good collection of math and physics links:
essentialmath.com/tutorial.htm
Physics for Game Programmers: Understanding Constraints
old blog post about smoothed particle hydrodynamics, with source code provided, and provides lots of practical advice
imdoingitwrong.wordpress.com/2010/12/14/why…
Classic gamasutra article about cloth and rigid body simulation:
graphics.cs.cmu.edu/nsp/course/15-…
Lots of good info about dealing with constraints!
Another good article that provides a good overview of cloth simulation
gamedevelopment.tutsplus.com/tutorials/simu…
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More from @erkaman2 see all

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someone asked me a good question, so I will write down the reply as a twitter thread below :D
Question is something like: "Where do the BRDF formulas come from? How can we make our own?"
Answer:
I will mostly explain specular BRDFs, since they are most used.
the most common way of making them, is by approximating the material
surface as a bunch of small mirrors called microfacets.
for very rough materials, these microfacets will have normals pointing
in all kinds of directions(left image). For smooth materials, there is less normal variation(right image),
and very smooth materials will closely resemble a flat mirror surface.
Read 26 tweets
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Alright! below im gonna post my collection of links related to
occlusion culling. if I missed good links, you folks are welcome to
post them below.
"Practical, Dynamic Visibility for Games"
blog.selfshadow.com/publications/p…
occlusion culling by creating hiz-buffer from occluders.
also uses it for shadow caster culling. they find AABB of
objects for culling against hiz-buffer
"Secrets of CryENGINE 3 Graphics Technology"
slideshare.net/TiagoAlexSousa…
occlusion culling by reprojecting depth of previous frame, downscale with max operator.
to cull objects, rasterize bounding boxes of objects, and cull them
against downsaled depth buffer.
Read 16 tweets
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alright, below I'm gonna list some professors/researchers in Computer Graphics whose research and papers I absolutely love.

you folks are also very much welcome to post your own suggestions below!
Morgan McGuire(@CasualEffects)

Virtual Reality, Real-time Rendering, Transparency, Anti-aliasing
Shadows, Ambient Occlusion
casual-effects.com/#research
Keenan Crane(@keenanisalive)

Geometry Processing, Differential Geometry, Computational Design
cs.cmu.edu/~kmcrane/
Read 12 tweets

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Right! It's time for me to settle in for the evening and talk about lithium batteries and where (I think) they're going. But I think a good start is to look at where they've come from.

So here comes a brief history of lithium batteries - accurate to the best of my knowledge!
Our story begins in the 1960s. The motivation for developing batteries was much the same then as it is now - pollution free energy storage, with portable devices and electric vehicles in mind. Lead-acid and nickel-cadmium were the gold standard for batteries - but too heavy.
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Read 26 tweets
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Guys, I want to talk about email marketing as an author for a minute. For those of you that don't know, my day job is in internet marketing, I've been doing it for sixteen years. And as someone who spends a lot of time in that world, some of the 'tips' I see for authors are WRONG
And sometimes borderline illegal (depending on the country). If you want to send emails for your author brand, please do some research before you start this. It's not something to be taken lightly, there are laws you need to follow. Every year new laws are being rolled out
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Want to laugh?

Draw a circle with a sharpie around an ant

They are thrown off, and think they are trapped in the circle

They don’t leave it

Want to feel bad?

Someone has done this to you

But you’ve lived in it so long

You think it’s home

Time to leave the circle
Too much external stimulus

Makes you incapable of looking inward

Introspection / self reflection is necessary for progressing

Want to limit someone’s ability to progress?

Create an environment with plenty of things to distract them with

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Physical Prisons are the least of our worries

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Read 7 tweets
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Detroit: Become Slave #SM #900x800 #ConCon #HankCon

จากทวิตนี้ เรามาหวีดต่อกันเถอะ
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Read 44 tweets
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Guys, it's time we had this discussion we always shy away from. Thread below.

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