minseopark 61315

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.

Force RGB Color on M1 Mac

How to Force RGB Color Output instead of YPbPr on your M1 Apple Silicon Mac for an External Monitor.

This step-by-step video tutorial will guide you through the procedure of forcing RGB color output on your M1 Mac.

Here is the direct link to the video tutorial: https://www.youtube.com/watch?v=Z1EqH3fd0V4

The video also has Closed Captions (Subtitles) that you can enable, to make it easier to follow if needed.

Computational Fluid Dynamics (in graphics mostly)

Disclaimer: I have no professional education in Compulational Fluid Dynamics, these are various notes on what I found/learned when trying to learn a bit on the topic. Some of the notes lack sources as I wrote them up later often just remembering some StackExchange answer. Some things I might have misinterpreted.

Computational Fluid Dynamics (in graphics mostly)
General / Overview
- Overarching resources
General Concepts & Keywords

Compute memory access pattern throughput benchmarks

We test the runtimes of simple compute shaders reading from one 3D texture using some kind of filter, and writing back to another texture. The local work group size of the compute shader is varied for some arbitrary set of work group sizes, and the effect of different internal texture formats are studied.

All tests are performed using 512x512x512 3D textures. At this size memory throughput and latency will be the primary bottleneck, so any extra calculations should have negligible impact on the timings.

All timings are measured by averaging the frame time across 128 frames, with a 128 frame warmup, with vsync disabled. Using queries might provide more stable numbers.

The work group sizes are:

CMake를 왜 쓰는거죠?
좋은 툴은 Visual Studio 뿐입니다. 그 이외에는 전부 사도(邪道)입니다 사도! - 작성자

주의

이 문서는 CMake를 주관적으로 서술합니다
이 문서를 통해 CMake를 시작하기엔 적합하지 않습니다
https://cgold.readthedocs.io/en/latest/ 3.1 챕터까지 따라해본 이후 기본사항들을 속성으로 익히는 것을 돕기위한 보조자료로써 작성되었습니다

Build and install instructions for Tensorflow with MKLDNN on a clean Centos 7.x machine.

Docker setup if needed

Docker install instructions: https://github.com/ravi9/misc-readmes/blob/master/install-docker-centos.md

docker pull centos/devtoolset-6-toolchain-centos7  

#Login into the docker with with USER 0 with sudo permissions.
docker run -it --user 0 centos/devtoolset-6-toolchain-centos7:latest /bin/bash

	Windows Registry Editor Version 5.00

	; also ok for HKLM
	; [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked]


	[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked]

	; ============================================================================
	; IDs extracted from:

	all: egltest

	egltest: egltest.cpp
	g++ -Wno-unused-variable -DDEBUG -g -O3 -Wall -Werror -I. -I../raylib-4.2.0/src -I/usr/include/libdrm -o $@ $^ -lOpenGL -lEGL -ldrm -lgbm -L../raylib-4.2.0/src -lraylib -lGL -lopenal -lm -lpthread -ldl -lX11 -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor -lGLEW -lGLU

	clean:
	rm -f *.o egltest

	// From: https://code.google.com/archive/p/kri/wikis/Quaternions.wiki

	struct Spatial {
	vec4 pos,rot;
	};

	//rotate vector
	vec3 qrot(vec4 q, vec3 v) {
	return v + 2.0cross(q.xyz, cross(q.xyz,v) + q.wv);
	}