FastNoise SIMD
FastNoise SIMD is the SIMD implementation of my noise library FastNoise. It aims to provide faster performance through the use of intrinsic(SIMD) CPU functions. Vectorisation of the code allows noise functions to process data in sets of 4 or 8 increasing performance by 300-400%.
After releasing FastNoise I got in contact with the author of FastNoise SIMD (naming is coincidence) and was inspired to work with SIMD functions myself. Through his code and discussions with him I created my implementation with even more optimisation thanks to the removal of lookup tables.
Runtime detection of highest supported instruction set ensures the fastest possible performance with only 1 compile needed. If no support is found it will fallback to standard types (float/int).
##Features
- Value Noise 3D
- Gradient (Perlin) Noise 3D
- Simplex Noise 3D
- Multiple fractal options for all of the above
- White Noise 3D
- Cellular Noise 3D
- Large variety of cellular noise settings
##Supported Instruction Sets
- AVX2 - FMA3
- SSE4.1
- SSE2
##Tested Compilers
- MSVC v120/v140
- Intel 16.0
- GCC 4.7 Linux
- Clang MacOSX
##Wiki Getting Started
More documentation coming soon.
#FastNoise SIMD Preview
I have written a compact testing application for all the features included in FastNoiseSIMD with a visual representation. I use this for development purposes and testing noise settings used in terrain generation. The fastest supported instruction set is also reported.
Download links can be found in the Releases Section.
#Performance Comparisons Using default noise settings on FastNoise SIMD and matching those settings across the other libraries where possible.
Timings below are average milliseconds for 1 million iterations on a single thread.
- CPU: i7 4790k @ 4.0Ghz
- Compiler: MSVC v140 x64
| Noise Type | FastNoise SIMD - AVX2 | FastNoise | LibNoise | ANL |
|---|---|---|---|---|
| Value | 4.12 | 13.85 | 24.16 | 94.73 |
| Value Fractal | 12.22 | 46.99 | 289.91 | |
| Gradient | 7.68 | 21.69 | 32.68 | 109.26 |
| Gradient Fractal | 21.54 | 84.22 | 122.15 | 325.04 |
| Simplex | 7.03 | 27.56 | 43.68 | |
| Simplex Fractal | 19.91 | 85.47 | 154.41 | |
| White Noise | 0.47 | 2.81 | ||
| Cellular | 31.42 | 122.21 | 1,122.60 | 2,473.06 |
Comparision of different SIMD levels can be seen here.
#Examples
###Cellular Noise
###Fracal Noise
###Value Noise
###White Noise
