Fluids v.3.1

Rama Hoetzlein (c) 2012-2014, https://ramakarl.com/fluids3

Source code based on the technique from:
2014, Hoetzlein. Fast Fixed-Radius Nearest Neighbors: Interactive Million-Particle Fluids. GPU Technology Conference. Santa Clara, CA. 2014.

UPDATE: March 7, 2014 Fluids v.3.1 is now available on github and on project website. This version is essentially identical, but is much easier to build. It has the following new features:

• Easier to build. No more dependency on freetype or glut.
• Interactive on-screen GUIs
• Upgraded to run on CUDA 5.0 and 5.5
• Profile timings. Now includes GPU markers for profiling on the GPU using NVIDIA’s free NSight tool.
• Bug fixes noticed by users

Requirements:

Fluids v.3.1 requires a CUDA-capable NVIDIA graphics card /w Compute capability 2.1 or higher. Builds tested on Windows 7 with Visual Studio 2010

Start Fluids by running fluids_v3.exe See below for License terms. See website for software details.

Fluids 3.1 makes use of the following libraries: CUDA - http://www.nvidia.com/object/cuda_home_new.html OpenGL - http://www.opengl.org/ TinyXML - http://www.grinninglizard.com/tinyxml/index.html

Keyboard commands:

H Turn scene info on/off N, M Change number of particles [, ] Change example scene (loaded from scene.xml) F, G Change algorithm (CPU, GPU, etc.) J Change rendering mode (points, sprites, spheres) C Adjust camera (using mouse) L Adjust light (using mouse) A,S,W,D Move camera target 1 Draw acceleration grid 2 Draw particle IDs (be sure # < 4096 first) ~ Start video capture to disk (tilde key) -, + Change grid density

Scene parameters:

• Example scenes are loaded from the scene.xml file All parameters are permitted in either Fluid or Scene sections. DT Simulation time step SimScale Simulation scale (see website) Viscosity Fluid viscosity coefficient RestDensity Fluid rest density Mass Fluid particle mass Radius Fluid particle radius, only for boundary tests IntStiff Fluid internal stiffness (non-boundary) BoundStiff Fluid stiffness at boundary BoundDamp Fluid damping at boundary AccelLimit Acceleration limit (for stability) VelLimit Velocity limit (for stability) PointGravAmt Strength of point gravity PointGravPos Position of point gravity PlaneGravDir Direction of plane gravity GroundSlope Slope of the ground (Y- plane) WaveForceFre Frequency of wave forcing WaveForceMin Amplitude of wave forcing from X- plane WaveForceMax Amplitude of wave forcing from X+ plane Name Name of scene example Num Number of particles to simulate VolMin Start corner of Domain Volume VolMax End corner of Domain Volume InitMin Start corner of Initial Particle placement InitMax End corner of Initial Particle placement

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FLUIDS v.3 - SPH Fluid Simulator for CPU and GPU Copyright (C) 2012-2013. Rama Hoetzlein

Z-Lib License