Water VFX

[1] Water splash https://www.youtube.com/watch?v=_3rlGlfJoXE

[2] 2019 Cinematic Water Flood Effects  https://www.youtube.com/watch?v=lUPS_pi8qc8
[3] Water simulation and breakdown https://www.youtube.com/watch?v=lWv6LL8D-Xc
[4] Breakdown Pyramid https://www.youtube.com/watch?v=Ixk5S0hbcTc
[5] Water and objects, Moana https://www.youtube.com/watch?v=P1VW4ZhPENA
[6] Realflow https://vimeo.com/212562829
[7] Realflow snow https://vimeo.com/193565200
[8] Realflow gpu https://vimeo.com/191669103
[9] Realflow Technical Reel https://vimeo.com/191157858

Others
[1] VFX adding graphites on scenes https://www.youtube.com/watch?v=unx9GIGf3rc
[2] Sphere https://www.youtube.com/watch?v=w9AqR7UnVgI

Fluids mandatory lectures

Navier-Stokes-equations
[0] Thesis: Parallel architecture to solve NSE https://tel.archives-ouvertes.fr/tel-01152623/document

[1] https://www.quora.com/What-are-the-uses-of-the-Bernoulli-equations-Eulers-equations-and-the-Navier-Stokes-equations-and-when-do-we-apply-them
[2] Prof. Wang http://web.cse.ohio-state.edu/~wang.3602/
[2] http://web.cse.ohio-state.edu/~wang.3602/courses/cse3541-2019-fall/
[2] Course http://web.cse.ohio-state.edu/~wang.3602/courses/cse788-2011-fall/
[2.1] SPH Water Simulation equations http://web.cse.ohio-state.edu/~wang.3602/courses/cse788-2011-fall/results/Yi_Liu/SPH%20Water%20Simulation.htm
[3] https://www.comsol.jp/multiphysics/fluid-flow-conservation-of-momentum-mass-and-energy
[4] Matthias Müller http://matthias-mueller-fischer.ch/
[5] CFD Intro https://www.mathematik.uni-dortmund.de/~kuzmin/cfdintro/lecture1.pdf


Others
[1] CSG https://evanw.github.io/csg.js/

PCA/WPCA

Video Lectures
[1] SVD to PCA https://www.youtube.com/watch?v=mBcLRGuAFUk

Lectures
[1] https://skymind.ai/wiki/eigenvector
[2] https://www.projectrhea.org/rhea/index.php/PCA_Theory_Examples


[3] PCA Theory Example http://www.cs.otago.ac.nz/cosc453/student_tutorials/principal_components.pdf

[4] Animation 2D PCA https://www.intmath.com/matrices-determinants/eigenvalues-eigenvectors-concept-applet.php


[5] PCA on OpenCV
https://robospace.wordpress.com/2013/10/09/object-orientation-principal-component-analysis-opencv/


[6] Wavelets, Fourier, Kalman http://www.cs.otago.ac.nz/cosc453/





Resources:
[1] https://machinelearningmastery.com/calculate-principal-component-analysis-scratch-python/
[2] https://jakevdp.github.io/PythonDataScienceHandbook/05.09-principal-component-analysis.html
[3] Draw 2D principal axis PCA https://stackoverflow.com/questions/18299523/basic-example-for-pca-with-matplotlib

Graphics Guide

Persons:

[1] Point Splatting https://cgg.mff.cuni.cz/~jaroslav/

SPH on Python

Based on https://pysph.readthedocs.io/en/1.0a1/installation.html
                https://pysph.readthedocs.io/en/latest/installation.html
Examples https://pypi.org/project/PySPH/

python3.2 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"

python3 -m venv /path/to/new/virtual/environment

Object arrays cannot be loaded when allow_pickle=False

pip install numpy==1.16.1

pip3 install PyQt5

 [1] SPH on Python https://github.com/pypr/pysph

Computer Graphics books

Basic in Fluids
Fluid Simulation for Computer Graphics Robert Bridson
The Art of Fluid Animation Jos Stam
Fluid Engine Development Doyub Kim


Fluid Simulations
 

 [1] Mathematics for 3D Game Programming and Computer Graphics


http://canvas.projekti.info/ebooks/Mathematics%20for%203D%20Game%20Programming%20and%20Computer%20Graphics,%20Third%20Edition.pdf
 [2] Computer Graphics Programming in OpenGL with C++
 [3] Opengl http://newton.uam.mx/xgeorge/uea/graficacion/(Morgan%20Kaufmann)%20Advanced%20Graphics%20Programming%20Using%20OpenGL%20(2005).pdf
 [4] 3D Graphics http://www.cse.chalmers.se/edu/year/2018/course/TDA361/LearningModern3DGraphicsProgramming.pdf
 [5]Foundations of 3D Computer Graphics
 [6] Interactive Computer Graphics https://inspirit.net.in/books/academic/Interactive%20Computer%20Graphics.pdf

Anti Aliasing Lectures

Lectures
[1] http://cs248.stanford.edu/winter19content/lectures/02_drawtriangle/02_drawtriangle_slides.pdf
[2] http://graphics.stanford.edu/courses/cs348b-19-spring-content/lectures/08_sampling/08_sampling_slides.pdf
[3] http://www8.cs.umu.se/kurser/TDBC07/HT04/handouts/HO-lecture5.pdf


References:
[1] Super Sample http://hhoppe.com/proj/supersample/
Amortized Supersampling  http://hhoppe.com/supersample.pdf
[2] Sampling https://noahmjacobs.com/graphics/rasterizer/
[3] MultiSampling https://learnopengl.com/Advanced-OpenGL/Anti-Aliasing
[4] Anti Aliasing https://vr.arvilab.com/blog/anti-aliasing

Super-sampling Anti-aliasing Analyzed https://pdfs.semanticscholar.org/ebd9/ddb08c4244fc7df00672cacb420212cdde54.pdf

Comparison for R.T. Applications http://jacoblongazo.com/documents/Anti-Aliasing%20Paper.pdf


Related:
[1] Deep Learning Super resolution (2019) https://arxiv.org/pdf/1808.03344.pdf

Fluid Simulation:Compile Position Based Dynamics

PositionBasedDynamics is a library for the physically-based simulation of rigid bodies, deformable solids and fluids.

mkdir build
cd build
cmake ..

vi ../Demos/CMakeLists.txt

find_package(OpenMP)
if (OPENMP_FOUND)
     set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif(OPENMP_FOUND)

New Challenges:
Cuda version https://github.com/eric1221bday/PBF_15418

https://github.com/ebirenbaum/ParticleSolver
https://github.com/StoneBird/CIS565-FinalProject
https://github.com/chiwsy/Position_Based_Fluids

Resources:
[1] PBD https://github.com/InteractiveComputerGraphics/PositionBasedDynamics/




OpenCL version
[1] https://github.com/bwiberg/position-based-fluids

$git clone https://github.com/bwiberg/position-based-fluids.git
$cd position-based-fluids
$git submodule update --init --recursive #call dependences
$cmake -DCMAKE_BUILD_TYPE=Debug ..

Fluid Simulation Lectures and Code

MPM From FLIP From PIC

Lectures:

[1] https://en.wikipedia.org/wiki/Material_point_method
[2] SPH Simulation lecture http://web.cse.ohio-state.edu/~wang.3602/courses/cse788-2011-fall/results/Yi_Liu/SPH%20Water%20Simulation.htm

 Video Lectures
[1] Introduction to SPH https://www.youtube.com/watch?v=tAXHCAEgSuE #Spectral processing
[1] SPH Theory https://www.youtube.com/watch?v=3BGKn8PyIHo

Codes:
[1] http://rlguy.com/gridfluidsim/
[2] http://kbladin.se/dmt_projects/fluid_simulation.php

Computer Animation

Resources:
[1] Animación y Simulación Avanzada http://www.mastergraficos.com/asignatura/animacion-simulacion-avanzada/

DualSPHysics Compile

Resources:
[1] code https://github.com/DualSPHysics/DualSPHysics
[2] scripts to execute models https://github.com/fincahuanaco/DualSPHysicsScripts

[3] https://dual.sphysics.org/index.php/downloads/
[4] https://dual.sphysics.org/files/3313/8753/4540/DualSPHysics_v3.0_GUIDE.pdf
[5] https://github.com/DualSPHysics/DualSPHysics/wiki/12.-Testcases#obc7

Update 2021

compile GPU version (CMakeLists.txt will find cuda, display ${CUDA_VERSION} to verify if is getting the right version).

See https://melhorum.blogspot.com/2021/03/cuda-8-on-linux18.html to install CUDA and requeriments.

on DualSPHysics/src/source

mkdir build

cd build

export CC=/usr/bin/gcc-5;CXX=/usr/bin/g++-5 #for cuda 8


export CC=/usr/bin/gcc-6;CXX=/usr/bin/g++-6 #for cuda 9

cmake ..

make In some cases you need to reduce cuda version to execute simulation. in case of GeForce GTX 460(with Driver Version: 390.59). I was forced to change from cuda9(supported) to cuda8(supported too) to execute simulations with around 360k particles.

Make Model

[1] https://www.freecadweb.org/

SPH Solvers and related

Resources:
[1] Code Catalog https://spheric-sph.org/sph-projects-and-codes
[2] GPUSPH https://www.gpusph.org/downloads/
Not compile by g++>4.9 (require Cuda)

$git clone https://github.com/gpusph/gpusph.git

$CC=/usr/bin/gcc-4.9 CXX=/usr/bin/g++-4.9 make

$make

[3] Crixus(Boundary definition) https://github.com/Azrael3000/Crixus

[4] C++ library that enables computations over a set of particles or points in N-dimensional space (cell list, kd-tree or hyper oct-tree) https://github.com/aboria/Aboria
[5] Previous to Aboria https://github.com/martinjrobins/SPH-DEM

Ocean References - Sources

https://www.fxguide.com/fxfeatured/siggraph-day-1-and-digipro/
ocean android https://arm-software.github.io/opengl-es-sdk-for-android/ocean_f_f_t.html
blender flip https://blendermarket.com/posts/flip-fluids-10-tips-to-improve-your-blender-workflow
standfor physic animation http://physbam.stanford.edu/

fast gpu fluid gvdb http://www.cs.utah.edu/~kwu/gvdb_sim.html

cuda openpbd http://joelgross.me/projects/pbf.html

others
[1] https://www.cs.cmu.edu/~kmcrane/Projects/GPUFluid/
[2] https://www.yiningkarlli.com/projects/arielflip.html
[3] https://developer.nvidia.com/nvidia-flow
[4] https://github.com/rlguy/Blender-FLIP-Fluids
[5] http://www.smart-coding.net/tag/irregular-sea-wave/
[6] http://revers.keep.pl/
[7] https://developer.nvidia.com/content/fluid-simulation-alice-madness-returns
[8] http://peterkutz.com/sph/

To read

https://www.maxwell.vrac.puc-rio.br/colecao.php?strSecao=resultado&nrSeq=12140@1
https://www.maxwell.vrac.puc-rio.br/colecao.php?strSecao=resultado&nrSeq=11074@2

Code:

 [3] https://github.com/NCCA/NGL
 https://www.sidefx.com/download/houdini-for-linux/
 [4] SPH/Muller https://github.com/bigthetaio/mueller-sph
       Tutorial https://bigtheta.io/2017/07/08/implementing-sph-in-2d.html
       Dependences: 
       sudo apt install freeglut3-dev
       sudo apt install libeigen3-dev
Surface Reconstruction :
[1] Detail Preserved Surface Reconstruction from
Point Cloud
{2}Deep Level Sets: Implicit Surface Representations for 3D Shape Inference
https://math.berkeley.edu/~sethian/2006/Papers/sethian.annualreview.2003.pdf
https://ascelibrary.org/doi/10.1061/%28ASCE%29SU.1943-5428.0000159
 [3] surface reconstruction from volume fraction https://arxiv.org/pdf/1801.05382.pdf
[4] Level Set methods for fluid interfaces https://www.ljll.math.upmc.fr/~frey/ftp/NM491/11.Sethian%20J.A.,%20Smereka%20P.,%20Level%20set%20methods%20for%20fluid%20interfaces.pdf

Write Scheme
[1] Fluid Simulation on AR https://cgl.ethz.ch/Downloads/Publications/Papers/2019/Tia19a/Tia19a.pdf


Model 3D:
Scene to 3D pose model
https://www.profillic.com/paper/arxiv:1907.11346


Thesis:
 [0]  https://nccastaff.bournemouth.ac.uk/jmacey/MastersProjects/
 [1] Position Based Fluid https://nccastaff.bournemouth.ac.uk/jmacey/MastersProjects/MSc16/09/mpthesis.pdf
 [2] https://nccastaff.bournemouth.ac.uk/jmacey/MastersProjects/MSc18/07/M_Volpicelli_i7630684_MScMajorProject_Report.pdf
 [3] https://nccastaff.bournemouth.ac.uk/jmacey/MastersProjects/MSc16/15/thesis.pdf
 [4] Museth http://www.museth.org/Ken/Publications_files/meis2013_abstract_museth.pdf


Relate Concepts:

https://en.wikipedia.org/wiki/Volume_rendering
https://link.springer.com/chapter/10.1007/978-3-642-76286-4_5#citeas
https://arxiv.org/pdf/1812.04233.pdf
http://pages.mtu.edu/~chaoliw/research/vg05-pmvrt.pdf
http://idav.ucdavis.edu/~okreylos/ResDev/VolVis/index.html
http://faculty.cs.tamu.edu/schaefer/research/wavelet_rasterization.pdf
https://en.wikipedia.org/wiki/Rasterisation
https://en.wikipedia.org/wiki/Voxel
https://en.wikipedia.org/wiki/3D_rendering
https://en.wikipedia.org/wiki/3D_computer_graphics
https://en.wikipedia.org/wiki/Computer_animation

Others

 [2] mapreduce on Python http://hplgit.github.io/map-reduce4sci/doc/pub/MapReduce.html

Points processing and Modeling

Surface Points

Resources:
[1] HPR Python https://github.com/williamsea/Hidden_Points_Removal_HPR

References:
[1] http://www.weizmann.ac.il/math/ronen/sites/math.ronen/files/uploads/katz_tal_basri_-_direct_visibility_of_point_sets.pdf
[2] https://www.cv-foundation.org/openaccess/content_iccv_2015/papers/Katz_On_the_Visibility_ICCV_2015_paper.pdf
[3] 2010 binary orientation tree http://graphics.im.ntu.edu.tw/docs/pg10.pdf
[4] 2014 Image Space Rendering of Point Clouds Using the HPR Operator
[5] https://www.lcg.ufrj.br/thesis/renan-machado-silva-MSc.pdf

3D Modeling
[1] Benchmark http://caor-mines-paristech.fr/en/research/point-cloud-and-3d-modeling-pc3dm/
[2] CFD on 3D Point Set Surfaces http://caor-mines-paristech.fr/en/research/point-cloud-and-3d-modeling-pc3dm/
[3] 

Fluid Simulation Lectures

Software:
[1] https://google.github.io/liquidfun/
[2] http://www.palabos.org/software/download
[3] Games https://github.com/gameprogcpp/code

References:
[1] NVidia FLIP
http://www.cemyuksel.com/research/papers/fast_fluid_simulations_with_sparse_volumes_on_the_gpu.pdf
https://link.springer.com/article/10.1007/s40722-016-0062-6
https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29HY.1943-7900.0001132?src=recsys
http://www.danenglesson.com/images/portfolio/FLIP/rapport.pdf
http://www.cs.jhu.edu/~misha/MyPapers/ToG13.pdf

Resources:
[1] https://blog.yiningkarlli.com/2014/02/flip-meshing-pipeline.html
[2] https://www.yiningkarlli.com/projects/arielflip.html
https://www.lancemore.jp/ls-dyna/index_en.html
https://www.lancemore.jp/ls-dyna/example_471.html
https://cfd.direct/openfoam/user-guide/v6-dambreak/
https://books.google.com.br/books?id=G-d1DwAAQBAJ&pg=PA779&lpg=PA779&dq=dam+break+simulation+code
 https://www.youtube.com/watch?v=GQvOlkQqRk0
 https://dual.sphysics.org/2ndusersworkshop/2016/Dominguez_Fourtakas_PPT_2ndUsersWorshop_161205_GF.pdf

OpenFoam

https://unicfd.ru/en/training-tracks/learning-how-to-use-free-surface-flows-in-openfoam-4-1/
https://www.scribd.com/document/44776293/OpenFoam-Examples

Video file to gif animation

ffmpeg can create gif from mp4/mpeg file, but create low quality, for resolve this we need to create a palette for increase quality.

Create palette colors
$ffmpeg -i file.mpeg -vf fps=15,scale=-1:-1:flags=lanczos,palettegen  palette.png

Use palette for create gif from complete mp4 file
$ffmpeg -i file.mp4 -i palette.png -filter_complex "fps=15,scale=-1:-1:flags=lanczos[x];[x][1:v]paletteuse" out_full.gif

Use palette for create gif from mp4 file (from 0:55 and 9seconds)
$ffmpeg -ss 0:55 -t 9 -i file.mp4 -i palette.png -filter_complex "fps=15,scale=-1:-1:flags=lanczos[x];[x][1:v]paletteuse" out_fraction.gif

Without palette
$ffmpeg -i imagebind.mp4  -r 10 -f image2pipe -vcodec ppm - | convert -delay 5 -loop 0 - imagebind.gif


Convert png files list to mp4 (two ways)

$avconv -r 20 -i buffer/plot%d.png -b:v 4000k animation_h1.mp4

$ffmpeg -i buffer/plot%d.png -r 20 -b 4M animation_h2.mp4

Convert jpg files into mp4
$ffmpeg -framerate 1 -i frames/f%d.jpg -r 2 -pix_fmt yuv420p video.mp4
$ffmpeg -framerate 10 -i Dragon.%04d.png -r 2 -pix_fmt yuv420p video.mp4



Cut/Extract video fraction same quality no filter/codec
$ffmpeg -ss 3:19 -t 4 -i Moana_WaterFX.mp4 -vcodec copy -acodec copy Moana_f3.mp4

Convert mp4 to gif using palette and resizing
$ffmpeg -i psplat2_4k.mp4 -i palette_psplat2_4k.png -filter_complex "fps=15,scale=-1:-1:flags=lanczos[x];[x][1:v]paletteuse" -s 346x264 psplat2_4k.gif

$ffmpeg -i fluidhoudini.mp4 -i palette.png -filter_complex "fps=15,scale=-1:-1:flags=lanczos[x];[x][1:v]paletteuse" -s 640x480 fluidhoudini_palette_640.gif



Crop image video
To crop a 528×336 section, starting from position (264, 30):

ffmpeg -i first_256.mp4 -filter:v "crop=528:336:264:30" -c:a copy first_256_crop.mp4 

#ffmpeg -i in.mp4 -filter:v "crop=out_w:out_h:x:y" out.mp4

Error on Image Magick (convert) 

convert-im6.q16: cache resources exhausted

open file /etc/ImageMagick-6/policy.xml and change

<policy domain="resource" name="disk" value="1GiB"/>

To

<policy domain="resource" name="disk" value="8GB"/>

Or

<!-- disable ghostscript format types -->
<policy domain="coder" rights="none" pattern="PS" />
<policy domain="coder" rights="none" pattern="EPS" />
<policy domain="coder" rights="none" pattern="PDF" /> <------- Here!!
<policy domain="coder" rights="none" pattern="XPS" />

To

<policy domain="coder" rights="read | write" pattern="PDF" /> 

#Change by code


sed -i -E 's/name="memory" value=".+"/name="memory" value="1GiB"/g' /etc/ImageMagick-6/policy.xml
sed -i -E 's/name="map" value=".+"/name="map" value="1GiB"/g' /etc/ImageMagick-6/policy.xml
sed -i -E 's/name="area" value=".+"/name="area" value="1GiB"/g' /etc/ImageMagick-6/policy.xml
sed -i -E 's/name="disk" value=".+"/name="disk" value="4GiB"/g' /etc/ImageMagick-6/policy.xml

Recommended resolution & aspect ratios

For the default 16:9 aspect ratio, encode at these resolutions:

• 2160p: 3840x2160
• 1440p: 2560x1440
• 1080p: 1920x1080
• 720p: 1280x720
• 480p: 854x480
• 360p: 640x360
• 240p: 426x240

Online tools

[1] Crop gifs https://ezgif.com

Mathematic for Surface Reconstruction

Basic Lecture
[1] Plane equation (Esp) https://aga.frba.utn.edu.ar/ecuaciones-del-plano/

[2] Session 69: Flux in 2D,  https://ocw.mit.edu/courses/mathematics/18-02sc-multivariable-calculus-fall-2010/3.-double-integrals-and-line-integrals-in-the-plane/part-c-greens-theorem/session-69-flux-in-2d/

[3] Green's theorem http://www.math.mcgill.ca/jakobson/courses/ma265/green.pdf
[4] Flux, Surface Integral and Gauss' Law http://www.phys.boun.edu.tr/~burcin/Flux.pdf
[5] http://people.csail.mit.edu/tieu/notebook/imageproc/tang82.pdf

Spanish
[1] Cálculo diferencial intranetua.uantof.cl/estudiomat/calculo3/stewart.pdf
     http://intranetua.uantof.cl/estudiomat/calculo3/

Cuda Installation resources

Cuda 10:
[1] last version https://developer.nvidia.com/cuda-downloads
Cuda 8:

#error -- unsupported GNU version! gcc versions later than 5 are not supported!
#error -- unsupported GNU version! gcc versions later than 5 are not supported!

$ sudo ln -s /usr/bin/gcc-4.9 /usr/local/cuda/bin/gcc
$ sudo ln -s /usr/bin/g++-4.9 /usr/local/cuda/bin/g++

nvcc warning : The 'compute_20', 'sm_20', and 'sm_21' architectures are deprecated, and may be removed in a future release (Use -Wno-deprecated-gpu-targets to suppress warning).



[1] https://developer.nvidia.com/cuda-80-ga2-download-archive