Gabor Papp gaborpapp

## Simulation_Projection.md

      
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                vassvik
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                Realtime Fluid Simulation: Projection
              
          
    Realtime Fluid Simulation: Projection

The core of most real-time fluid simulators, like the one in EmberGen, are based on the "Stable Fluids" algorithm by Jos Stam, which to my knowledge was first presented at SIGGRAPH '99. This is a post about one part of this algorithm that's often underestimated: Projection

  
    MG4_F32.mp4
    
  
Stable Fluids

The Stable Fluids algorithm solves a subset of the famous "Navier Stokes equations", which describe how fluids interact and move. In particular, it typically solves what's called the "incompressible Euler equations", where viscous forces are often ignored.

  
## twitter-gifs.md

      
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                jackrusher
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    Twitter abuses all media file uploads, each type in its own way. If we
want to upload a good looking animation loop from some low-color,
high-detail generative art, we have to game their system's mechanisms.


don't upload a video file, they will re-encode it into absolute 💩


create a GIF, which they will auto-convert into a video file 😱


The frames of the GIF will be resized to an even-sized width using an
extremely naive algorithm. Your GIF should be an even size (1000, 2000,


## Tech Art Expectations
There are a handful of different specializations under the ‘Tech Art’ umbrella, the first step would be to identify what area interests them.  Below are different specializations and what skills I would expect for each discipline.

Technical Animator (TD at IG)
This role is for an individual interested in empowering Animators.  Physics, jiggle, muscle deformation and cloth simulation are particular areas that would be explored in this role.  A portfolio would show the following:

•	Understanding of Rigging
•	Understanding of OpenMaya/PyMEL/MEL/Python
•	Understanding of Mocap Pipelines

Technical Artist (Rendering)

## CloudsResources.md

      
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                pixelsnafu
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                Useful Resources for Rendering Volumetric Clouds
              
          
    Volumetric Clouds Resources List


A. Schneider, "Real-Time Volumetric Cloudscapes," in GPU Pro 7: Advanced
Rendering Techniques, 2016, pp. 97-127. (Follow up presentations here, and here.)


S. Hillaire, "Physically Based Sky, Atmosphere and Cloud Rendering in Frostbite"
in Physically Based Shading in Theory and Practice course, SIGGRAPH 2016. [video] [course notes] [scatter integral shadertoy]


[R. Högfeldt, "Convincing Cloud Rendering – An Implementation of Real-Time Dynamic Volumetric Clouds in Frostbite"](https://odr.chalmers.se/hand


## kdtree-test2.pde
// Processing code by Etienne JACOB
// motion blur template by beesandbombs
// opensimplexnoise code in another tab might be necessary
// --> code here : https://gist.github.com/Bleuje/fce86ef35b66c4a2b6a469b27163591e

int[][] result;
float t, c;

float ease(float p) {
  return 3*p*p - 2*p*p*p;

## perforce.MD

      
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                ben-doyle
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              November 21, 2023 18:33
            
              
                Perforce for git users.
              
          
    Understanding Perforce (as a git user).

Commands


Git
Perforce Command Line
P4V
Notes


git pull
p4 sync
get latest revision


n/a
p4 update
?
Get latest revision without overwriting files that have been changed.


git checkout
p4 edit
checkout
You plan to change a file from the version control system


git commit
p4 submit
submit


git push
n/a
n/a
No perforce equivalent. There is no concept of a pure local submit in Perforce.


## GPUOptimizationForGameDev.md

      
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                silvesthu
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                GPU Optimization for GameDev
              
          
    GPU Optimization for GameDev

Graphics Pipeline / GPU Architecture Overview


2011 - A trip through the Graphics Pipeline 2011
2015 - Life of a triangle - NVIDIA's logical pipeline
2015 - Render Hell 2.0
2016 - How bad are small triangles on GPU and why?
2017 - GPU Performance for Game Artists
2019 - Understanding the anatomy of GPUs using Pokémon
2020 - GPU ARCHITECTURE RESOURCES


## compute_optimisation.md

      
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                pixelmager
                / compute_optimisation.md
            
            
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    2020

https://miketuritzin.com/post/hierarchical-depth-buffers/
https://developer.nvidia.com/blog/optimizing-compute-shaders-for-l2-locality-using-thread-group-id-swizzling/
https://asawicki.info/news_1735_a_better_way_to_scalarize_a_shader

2019

https://developer.download.nvidia.com/video/GDC-19/NSIGHT_GPU_TRACE_Bavoil.pdf (video)

2018

https://anteru.net/blog/2018/intro-to-compute-shaders/index.html


## gltf_primitive_pbr_fs.glsl
precision highp float;

// The PBR shader below is adapted from the Khronos glTF WebGL example:
// https://github.com/KhronosGroup/glTF-WebGL-PBR/blob/master/shaders/pbr-frag.glsl

struct PBRInfo {
    float NdotL; // cos angle between normal and light direction
    float NdotV; // cos angle between normal and view direction
    float NdotH; // cos angle between normal and half vector
    float LdotH; // cos angle between light direction and half vector

## fast_spheres.txt
Setup:
1. Index buffer containing N quads (each 2 triangles), where N is the max amount of spheres. Repeating pattern of {0,1,2,1,3,2} + K*4.
2. No vertex buffer.

Render N*2 triangles, where N is the number of spheres you have.

Vertex shader:
1. Sphere index = N/4 (N = SV_VertexId)
2. Quad coord: Q = float2(N%2, (N%4)/2) * 2.0 - 1.0
3. Transform sphere center -> pos
	There are a handful of different specializations under the ‘Tech Art’ umbrella, the first step would be to identify what area interests them. Below are different specializations and what skills I would expect for each discipline.

	Technical Animator (TD at IG)
	This role is for an individual interested in empowering Animators. Physics, jiggle, muscle deformation and cloth simulation are particular areas that would be explored in this role. A portfolio would show the following:

	• Understanding of Rigging
	• Understanding of OpenMaya/PyMEL/MEL/Python
	• Understanding of Mocap Pipelines

	Technical Artist (Rendering)
	// Processing code by Etienne JACOB
	// motion blur template by beesandbombs
	// opensimplexnoise code in another tab might be necessary
	// --> code here : https://gist.github.com/Bleuje/fce86ef35b66c4a2b6a469b27163591e

	int[][] result;
	float t, c;

	float ease(float p) {
	return 3pp - 2pp*p;
Git	Perforce Command Line	P4V	Notes
git pull	p4 sync	get latest revision
n/a	p4 update	?	Get latest revision without overwriting files that have been changed.
git checkout	p4 edit	checkout	You plan to change a file from the version control system
git commit	p4 submit	submit
git push	n/a	n/a	No perforce equivalent. There is no concept of a pure local submit in Perforce.
	precision highp float;

	// The PBR shader below is adapted from the Khronos glTF WebGL example:
	// https://github.com/KhronosGroup/glTF-WebGL-PBR/blob/master/shaders/pbr-frag.glsl

	struct PBRInfo {
	float NdotL; // cos angle between normal and light direction
	float NdotV; // cos angle between normal and view direction
	float NdotH; // cos angle between normal and half vector
	float LdotH; // cos angle between light direction and half vector
	Setup:
	1. Index buffer containing N quads (each 2 triangles), where N is the max amount of spheres. Repeating pattern of {0,1,2,1,3,2} + K*4.
	2. No vertex buffer.

	Render N*2 triangles, where N is the number of spheres you have.

	Vertex shader:
	1. Sphere index = N/4 (N = SV_VertexId)
	2. Quad coord: Q = float2(N%2, (N%4)/2) * 2.0 - 1.0
	3. Transform sphere center -> pos