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-rw-r--r--src/test/bench/noise.rs123
1 files changed, 0 insertions, 123 deletions
diff --git a/src/test/bench/noise.rs b/src/test/bench/noise.rs
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index 81a6fb8ff6d..00000000000
--- a/src/test/bench/noise.rs
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-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// Multi-language Perlin noise benchmark.
-// See https://github.com/nsf/pnoise for timings and alternative implementations.
-
-#![feature(rand, core)]
-
-use std::f32::consts::PI;
-use std::__rand::{Rng, thread_rng};
-
-#[derive(Copy, Clone)]
-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) }
-
-fn random_gradient<R: Rng>(r: &mut R) -> Vec2 {
-    let v = PI * 2.0 * r.gen::<f32>();
-    Vec2 { x: v.cos(), y: v.sin() }
-}
-
-fn gradient(orig: Vec2, grad: Vec2, p: Vec2) -> f32 {
-    (p.x - orig.x) * grad.x + (p.y - orig.y) * grad.y
-}
-
-struct Noise2DContext {
-    rgradients: [Vec2; 256],
-    permutations: [i32; 256],
-}
-
-impl Noise2DContext {
-    fn new() -> Noise2DContext {
-        let mut rng = thread_rng();
-
-        let mut rgradients = [Vec2 { x: 0.0, y: 0.0 }; 256];
-        for x in &mut rgradients[..] {
-            *x = random_gradient(&mut rng);
-        }
-
-        let mut permutations = [0; 256];
-        for (i, x) in permutations.iter_mut().enumerate() {
-            *x = i as i32;
-        }
-        rng.shuffle(&mut permutations);
-
-        Noise2DContext { rgradients: rgradients, permutations: permutations }
-    }
-
-    fn get_gradient(&self, x: i32, y: i32) -> Vec2 {
-        let idx = self.permutations[(x & 255) as usize] +
-                    self.permutations[(y & 255) as usize];
-        self.rgradients[(idx & 255) as usize]
-    }
-
-    fn get_gradients(&self, x: f32, y: f32) -> ([Vec2; 4], [Vec2; 4]) {
-        let x0f = x.floor();
-        let y0f = y.floor();
-        let x1f = x0f + 1.0;
-        let y1f = y0f + 1.0;
-
-        let x0 = x0f as i32;
-        let y0 = y0f as i32;
-        let x1 = x0 + 1;
-        let y1 = y0 + 1;
-
-        ([self.get_gradient(x0, y0), self.get_gradient(x1, y0),
-          self.get_gradient(x0, y1), self.get_gradient(x1, y1)],
-         [Vec2 { x: x0f, y: y0f }, Vec2 { x: x1f, y: y0f },
-          Vec2 { x: x0f, y: y1f }, Vec2 { x: x1f, y: y1f }])
-    }
-
-    fn get(&self, x: f32, y: f32) -> f32 {
-        let p = Vec2 {x: x, y: y};
-        let (gradients, origins) = self.get_gradients(x, y);
-
-        let v0 = gradient(origins[0], gradients[0], p);
-        let v1 = gradient(origins[1], gradients[1], p);
-        let v2 = gradient(origins[2], gradients[2], p);
-        let v3 = gradient(origins[3], gradients[3], p);
-
-        let fx = smooth(x - origins[0].x);
-        let vx0 = lerp(v0, v1, fx);
-        let vx1 = lerp(v2, v3, fx);
-        let fy = smooth(y - origins[0].y);
-
-        lerp(vx0, vx1, fy)
-    }
-}
-
-fn main() {
-    let symbols = [' ', '░', '▒', '▓', '█', '█'];
-    let mut pixels = Box::new([0f32; 256*256]);
-    let n2d = Box::new(Noise2DContext::new());
-
-    for _ in 0..100 {
-        for y in 0..256 {
-            for x in 0..256 {
-                let v = n2d.get(x as f32 * 0.1, y as f32 * 0.1);
-                pixels[y*256+x] = v * 0.5 + 0.5;
-            }
-        }
-    }
-
-    for y in 0..256 {
-        for x in 0..256 {
-            let idx = (pixels[y*256+x] / 0.2) as usize;
-            print!("{}", symbols[idx]);
-        }
-        print!("\n");
-    }
-}