diff --git a/src/test/bench/noise.rs b/src/test/bench/noise.rs index d28382abaa386..4397dcd5247f5 100644 --- a/src/test/bench/noise.rs +++ b/src/test/bench/noise.rs @@ -1,25 +1,28 @@ // Perlin noise benchmark from https://gist.github.com/1170424 -use core::rand::RngUtil; +use core::rand::{Rng, RngUtil}; struct Vec2 { x: f32, y: f32, } -fn lerp(a: f32, b: f32, v: f32) -> f32 { a * (1.0 - v) + b * v } -fn smooth(v: f32) -> f32 { v * v * (3.0 - 2.0 * v) } +#[inline(always)] +fn lerp(a: f32, b: f32, v: f32) -> f32 { a * (1.0 - v) + b * v } -fn random_gradient(r: @rand::Rng) -> Vec2 { +#[inline(always)] +fn smooth(v: f32) -> f32 { v * v * (3.0 - 2.0 * v) } + +fn random_gradient(r: @Rng) -> Vec2 { let v = r.gen_float() * float::consts::pi * 2.0; - Vec2{ + Vec2 { x: float::cos(v) as f32, y: float::sin(v) as f32, } } fn gradient(orig: Vec2, grad: Vec2, p: Vec2) -> f32 { - let sp = Vec2{x: p.x - orig.x, y: p.y - orig.y}; + let sp = Vec2 {x: p.x - orig.x, y: p.y - orig.y}; grad.x * sp.x + grad.y + sp.y } @@ -28,28 +31,28 @@ struct Noise2DContext { permutations: [int, ..256], } -fn Noise2DContext() -> ~Noise2DContext { - let r = rand::Rng(); - let mut rgradients = [ Vec2 { x: 0.0, y: 0.0 }, ..256 ]; - for int::range(0, 256) |i| { rgradients[i] = random_gradient(r); } - let mut permutations = [ 0, ..256 ]; - for int::range(0, 256) |i| { permutations[i] = i; } - r.shuffle_mut(permutations); - - ~Noise2DContext{ - rgradients: rgradients, - permutations: permutations, +pub impl Noise2DContext { + fn new() -> Noise2DContext { + let r = rand::Rng(); + let mut rgradients = [ Vec2 { x: 0.0, y: 0.0 }, ..256 ]; + for int::range(0, 256) |i| { rgradients[i] = random_gradient(r); } + let mut permutations = [ 0, ..256 ]; + for int::range(0, 256) |i| { permutations[i] = i; } + r.shuffle_mut(permutations); + + Noise2DContext { + rgradients: rgradients, + permutations: permutations, + } } -} -pub impl Noise2DContext { #[inline(always)] fn get_gradient(&self, x: int, y: int) -> Vec2 { let idx = self.permutations[x & 255] + self.permutations[y & 255]; self.rgradients[idx & 255] } - #[inline(always)] + #[inline] fn get_gradients(&self, gradients: &mut [Vec2, ..4], origins: &mut [Vec2, ..4], x: f32, y: f32) { let x0f = f32::floor(x); let y0f = f32::floor(y); @@ -63,14 +66,15 @@ pub impl Noise2DContext { gradients[2] = self.get_gradient(x0, y1); gradients[3] = self.get_gradient(x1, y1); - origins[0] = Vec2{x: x0f + 0.0, y: y0f + 0.0}; - origins[1] = Vec2{x: x0f + 1.0, y: y0f + 0.0}; - origins[2] = Vec2{x: x0f + 0.0, y: y0f + 1.0}; - origins[3] = Vec2{x: x0f + 1.0, y: y0f + 1.0}; + origins[0] = Vec2 {x: x0f + 0.0, y: y0f + 0.0}; + origins[1] = Vec2 {x: x0f + 1.0, y: y0f + 0.0}; + origins[2] = Vec2 {x: x0f + 0.0, y: y0f + 1.0}; + origins[3] = Vec2 {x: x0f + 1.0, y: y0f + 1.0}; } + #[inline] fn get(&self, x: f32, y: f32) -> f32 { - let p = Vec2{x: x, y: y}; + let p = Vec2 {x: x, y: y}; let mut gradients = [ Vec2 { x: 0.0, y: 0.0 }, ..4 ]; let mut origins = [ Vec2 { x: 0.0, y: 0.0 }, ..4 ]; self.get_gradients(&mut gradients, &mut origins, x, y); @@ -88,9 +92,9 @@ pub impl Noise2DContext { fn main() { let symbols = [" ", "░", "▒", "▓", "█", "█"]; - let mut pixels = vec::from_elem(256*256, 0f32); - let n2d = Noise2DContext(); - for int::range(0, 100) |_| { + let mut pixels = [0f32, ..256*256]; + let n2d = ~Noise2DContext::new(); + for 100.times { for int::range(0, 256) |y| { for int::range(0, 256) |x| { let v = n2d.get( @@ -109,4 +113,3 @@ fn main() { io::println(""); }*/ } -