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Diffstat (limited to 'src/sample/mod.rs')
-rw-r--r-- | src/sample/mod.rs | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/src/sample/mod.rs b/src/sample/mod.rs deleted file mode 100644 index 1a53921..0000000 --- a/src/sample/mod.rs +++ /dev/null @@ -1,46 +0,0 @@ -use crate::{M_PI, Float}; -use crate::core::{Vector3f, Vector2f}; - -mod uniform; - -pub use uniform::UniformSampler; - -fn distribute_between(x: Float, a: Float, b: Float) -> Float { - x * (b - a) + a -} - -pub trait Sampler { - fn get_sample(&mut self) -> Float; - - fn get_sample_2d(&mut self) -> Vector2f { - Vector2f::new_xy(self.get_sample(), self.get_sample()) - } - - fn clone_and_seed(&mut self) -> Box<dyn Sampler + Send>; - - fn get_unit_vector(&mut self) -> Vector3f { - let s2d = self.get_sample_2d(); - - let lambda = distribute_between(s2d.x, -M_PI, M_PI); - let costheta = 2.0 * s2d.y - 1.0; - let sintheta = costheta.acos().sin(); - - Vector3f::new_xyz( - lambda.cos() * sintheta, - lambda.sin() * sintheta, - costheta, - ) - } - - fn get_in_circle(&mut self) -> Vector2f { - let s2d = self.get_sample_2d(); - - let d = s2d.x.sqrt(); - let theta = s2d.y * 2.0 * M_PI; - - Vector2f::new_xy( - d * theta.cos(), - d * theta.sin(), - ) - } -} |