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Minor optimization

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This commit is contained in:
hodasemi 2019-03-20 17:15:07 +01:00
parent 99ad9ea260
commit 8f74621937
2 changed files with 41 additions and 16 deletions
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33
src/main.rs
View file

@ -18,11 +18,28 @@ mod view;
use view::View;
fn main() {
let input_data = [Triangle::new(
let input_data = [
Triangle::new(
vec3(0.0, 0.0, 0.0),
vec3(1.0, 0.0, 0.0),
vec3(1.0, 1.0, 0.0),
)];
),
Triangle::new(
vec3(1.0, 1.0, 0.0),
vec3(0.0, 1.0, 0.0),
vec3(0.0, 0.0, 0.0),
),
Triangle::new(
vec3(1.0, 1.0, 0.0),
vec3(2.0, 1.0, 0.0),
vec3(2.0, 2.0, 0.0),
),
Triangle::new(
vec3(2.0, 2.0, 0.0),
vec3(1.0, 2.0, 0.0),
vec3(1.0, 1.0, 0.0),
),
];
let view = View {
position: vec3(0.0, -4.0, 4.0),
@ -31,6 +48,8 @@ fn main() {
fov: 45.0,
};
let debug_ray = Ray::primary_ray(640.0, 360.0, 1280.0, 720.0, &view);
debug_raytracer(1280, 720, &view, &input_data);
}
@ -95,12 +114,12 @@ fn look_at_test(eye: Vector3<f32>, center: Vector3<f32>, up: Vector3<f32>) -> Ma
fn debug_raytracer(dim_x: u32, dim_y: u32, view: &View, data: &[Triangle]) {
let mut imgbuf = ImageBuffer::new(dim_x, dim_y);
for (x, y, pixel) in imgbuf.enumerate_pixels_mut() {
let ray = Ray::primary_ray(x, y, dim_x, dim_y, view);
let acceleration_data = create_acceleration_data(data);
let color = pixel_color(&ray, data, acceleration_data);
for (x, y, pixel) in imgbuf.enumerate_pixels_mut() {
let ray = Ray::primary_ray(x as f32, y as f32, dim_x as f32, dim_y as f32, view);
let color = pixel_color(&ray, data, &acceleration_data);
*pixel = image::Rgb([f_to_u(color.x), f_to_u(color.y), f_to_u(color.z)]);
}
@ -157,7 +176,7 @@ fn create_acceleration_data(input_data: &[Triangle]) -> Vec<AABB> {
acceleration_data
}
fn pixel_color(ray: &Ray, data: &[Triangle], acceleration_data: Vec<AABB>) -> Vector3<f32> {
fn pixel_color(ray: &Ray, data: &[Triangle], acceleration_data: &Vec<AABB>) -> Vector3<f32> {
let mut final_color = vec3(0.0, 1.0, 0.0);
let mut closest_value = MAX;
let mut closest_index = -1;

18
src/ray.rs
View file

@ -25,17 +25,23 @@ impl Ray {
}
}
pub fn primary_ray(x: u32, y: u32, dim_y: u32, dim_x: u32, view: &View) -> Ray {
let aspect_ratio = dim_x as f32 / dim_y as f32;
pub fn primary_ray(x: f32, y: f32, dim_x: f32, dim_y: f32, view: &View) -> Ray {
let aspect_ratio = dim_x / dim_y;
let uv = vec2(x as f32, y as f32);
let uv = vec2((x + 0.5) / dim_x, (y + 0.5) / dim_y);
let (up, right) = view.axises();
let trans = 2.0 * uv - vec2(1.0, 1.0);
let mut dir = view.look_at + right * trans.x + up * trans.y;
dir = vec3(dir.x * aspect_ratio, dir.y, dir.z * aspect_ratio);
let raw_dir = view.look_at + right * trans.x + up * trans.y;
return Self::new(view.position, dir.normalize());
let dir = vec3(
raw_dir.x * aspect_ratio,
raw_dir.y,
raw_dir.z * aspect_ratio,
)
.normalize();
return Self::new(view.position, dir);
}
}