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gamma

This commit is contained in:
dengqn 2025-08-06 10:57:11 +08:00
parent 89ad39b3e4
commit 33b3707064
2 changed files with 13 additions and 5 deletions
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10
src/camera.rs
View File

@ -2,7 +2,7 @@ use std::fs::File;
use std::io::{BufWriter}; use std::io::{BufWriter};
use crate::hittable::HittableList; use crate::hittable::HittableList;
use crate::math_utils::clamp; use crate::math_utils::{clamp, linear_to_gamma};
use crate::ppm_writer::PPMWriter; use crate::ppm_writer::PPMWriter;
use crate::types_defined::{Camera, Color, Point, Ray, Vec3}; use crate::types_defined::{Camera, Color, Point, Ray, Vec3};
use rand::rngs::ThreadRng; use rand::rngs::ThreadRng;
@ -83,12 +83,12 @@ impl<'a> Camera<'a> {
// clamp color rgb // clamp color rgb
let color_clamped = Color::new( let color_clamped = Color::new(
clamp(color.x, 0.0, 1.0), clamp(linear_to_gamma(color.x), 0.0, 1.0),
clamp(color.y, 0.0, 1.0), clamp(linear_to_gamma(color.y), 0.0, 1.0),
clamp(color.z, 0.0, 1.0), clamp(linear_to_gamma(color.z), 0.0, 1.0),
); );
self.ppm_file_writer.write(color.to_color()); let _ = self.ppm_file_writer.write(color_clamped.to_color());
// content // content

8
src/math_utils.rs
View File

@ -7,4 +7,12 @@ pub fn clamp(value: f32, low: f32, high: f32) -> f32 {
return high; return high;
} }
return value; return value;
}
pub fn linear_to_gamma(value: f32) -> f32 {
if value > 0.0 {
value.sqrt()
} else {
0.0
}
} }