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62d3136..082fb92 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -36,6 +36,7 @@ rustc-serialize = "0.3" scoped_threadpool = "0.1" time = "0.1" glam = {git="https://github.com/bitshifter/glam-rs.git", rev="0f314f99", default-features=false, features=["approx"]} +fastapprox = "0.3" # Local crate dependencies [dependencies.bvh_order] diff --git a/LICENSE.md b/LICENSE.md index 0c7d864..ce8ffb5 100644 --- a/LICENSE.md +++ b/LICENSE.md @@ -1,6 +1,6 @@ ## Psychopath -With the exception of files under `psychoblend/` and `sub_crates/`, and any code explicitly excepted in code comments, this project is licensed under the GPLv3 as follows: +With the exception of files under `psychoblend/` and `sub_crates/`, this project is licensed under the GPLv3 as follows: Copyright (c) 2020 Nathan Vegdahl diff --git a/licenses/MIT.txt b/licenses/MIT.txt index 163e16f..4eae24c 100644 --- a/licenses/MIT.txt +++ b/licenses/MIT.txt @@ -1,19 +1,19 @@ -Copyright +Copyright (c) 2020 Nathan Vegdahl -Permission is hereby granted, free of charge, to any person obtaining a -copy of this software and associated documentation files (the "Software"), -to deal in the Software without restriction, including without limitation -the rights to use, copy, modify, merge, publish, distribute, sublicense, -and/or sell copies of the Software, and to permit persons to whom the -Software is furnished to do so, subject to the following conditions: +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in -all copies or substantial portions of the Software. +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL -THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/src/math.rs b/src/math.rs index 10255d3..6df51e4 100644 --- a/src/math.rs +++ b/src/math.rs @@ -188,64 +188,34 @@ pub fn probit(n: f32, width: f32) -> f32 { x as f32 * width } -//---------------------------------------------------------------- -// Adapted to Rust from https://code.google.com/archive/p/fastapprox/ - pub fn fast_ln(x: f32) -> f32 { - use std::mem::transmute_copy; - - let mut y = unsafe { transmute_copy::(&x) as f32 }; - y *= 8.262_958_288_192_749_0e-8; - y - 87.989_971_088 + fastapprox::fast::ln(x) } pub fn fast_pow2(p: f32) -> f32 { - use std::mem::transmute_copy; - - let offset: f32 = if p < 0.0 { 1.0 } else { 0.0 }; - let clipp: f32 = if p < -126.0 { -126.0 } else { p }; - let w: i32 = clipp as i32; - let z: f32 = clipp - w as f32 + offset; - - let i: u32 = ((1 << 23) as f32 - * (clipp + 121.274_057_5 + 27.728_023_3 / (4.842_525_68 - z) - 1.490_129_07 * z)) - as u32; - - unsafe { transmute_copy::(&i) } + fastapprox::fast::pow2(p) } pub fn fast_log2(x: f32) -> f32 { - use std::mem::transmute_copy; - - let xi = unsafe { transmute_copy::(&x) }; - let y = xi as f32 * 1.192_092_895_507_812_5e-7; - let mx = unsafe { transmute_copy::(&((xi & 0x007F_FFFF) | 0x3f00_0000)) }; - - y - 124.225_514_99 - 1.498_030_302 * mx - 1.725_879_99 / (0.352_088_706_8 + mx) + fastapprox::fast::log2(x) } pub fn fast_exp(p: f32) -> f32 { - fast_pow2(f32::consts::LOG2_E * p) + fastapprox::fast::exp(p) } pub fn fast_pow(x: f32, p: f32) -> f32 { - fast_pow2(p * fast_log2(x)) + fastapprox::fast::pow(x, p) } pub fn faster_pow2(p: f32) -> f32 { - use std::mem::transmute_copy; - - let clipp: f32 = if p < -126.0 { -126.0 } else { p }; - let i: u32 = ((1 << 23) as f32 * (clipp + 126.942_695_04)) as u32; - - unsafe { transmute_copy::(&i) } + fastapprox::faster::pow2(p) } pub fn faster_exp(p: f32) -> f32 { - faster_pow2(f32::consts::LOG2_E * p) + fastapprox::faster::exp(p) } -// End of adapted code //---------------------------------------------------------------- #[cfg(test)]