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use rand::StdRng;
use rand::distributions::{Range, IndependentSample};
use sampler::{Sampler, Region};
pub struct Uniform {
region: Region,
float_range: Range<f32>,
}
impl Uniform {
pub fn new(dim: (u32, u32)) -> Uniform {
Uniform { region: Region::new((0, 0), dim), float_range: Range::new(0.0, 1.0) }
}
}
impl Sampler for Uniform {
fn get_samples(&mut self, samples: &mut Vec<(f32, f32)>, _: &mut StdRng) {
samples.clear();
if !self.has_samples() {
return;
}
samples.push((self.region.current.0 as f32 + 0.5, self.region.current.1 as f32 + 0.5));
self.region.current.0 += 1;
if self.region.current.0 == self.region.end.0 {
self.region.current.0 = self.region.start.0;
self.region.current.1 += 1;
}
}
fn get_samples_2d(&mut self, samples: &mut [(f32, f32)], rng: &mut StdRng) {
for s in samples.iter_mut() {
s.0 = self.float_range.ind_sample(rng);
s.1 = self.float_range.ind_sample(rng);
}
}
fn get_samples_1d(&mut self, samples: &mut [f32], rng: &mut StdRng) {
for s in samples.iter_mut() {
*s = self.float_range.ind_sample(rng);
}
}
fn max_spp(&self) -> usize { 1 }
fn has_samples(&self) -> bool { self.region.current.1 != self.region.end.1 }
fn dimensions(&self) -> (u32, u32) { self.region.dim }
fn select_block(&mut self, start: (u32, u32)) {
self.region.select_region(start);
}
fn get_region(&self) -> &Region{
&self.region
}
}