Add image texture

This commit is contained in:
max.nuding 2022-07-07 12:08:17 +02:00
parent 38a67a6890
commit d69fd86f8b
Failed to extract signature
6 changed files with 85 additions and 4 deletions

10
Cargo.lock generated
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@ -148,12 +148,22 @@ dependencies = [
"bytemuck",
"byteorder",
"color_quant",
"jpeg-decoder",
"num-iter",
"num-rational",
"num-traits",
"png",
]
[[package]]
name = "jpeg-decoder"
version = "0.2.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9478aa10f73e7528198d75109c8be5cd7d15fb530238040148d5f9a22d4c5b3b"
dependencies = [
"rayon",
]
[[package]]
name = "libc"
version = "0.2.126"

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@ -7,7 +7,7 @@ include = ["/src"]
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
image = { version = "0.24.2", default-features = false, features=["png"] }
image = { version = "0.24.2", default-features = false, features=["png", "jpeg", "jpeg_rayon"] }
rand = "0.8.5"
rayon = "1.5.3"

55
src/image_texture.rs Normal file
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@ -0,0 +1,55 @@
/*
let img = image::open("tests/images/jpg/progressive/cat.jpg").unwrap();
let rgnbi = img.into_rgb8();
rgnbi.get_pixel(0, 0);
rgnbi.
*/
use image::{Pixel, RgbImage};
use crate::{Color, Point3};
use crate::texture::Texture;
pub struct ImageTexture {
image: Option<RgbImage>
}
impl ImageTexture {
pub fn new(path: &str) -> Self {
let image = image::open(path)
.map(|i|i.into_rgb8())
.ok();
Self {
image
}
}
fn value_from_image(image: &RgbImage, u: f64, v: f64) -> Color {
// Clamp input texture coordinates to [0,1] x [1,0]
let u = u.clamp(0.0, 1.0);
let v = v.abs().clamp(0.0, 1.0); // Flip V to image coordinates
let i = match (u * image.width() as f64) as i32 {
i if i >= image.width() as i32 => image.width() as i32 - 1,
i => i
};
let j = match (v * image.height() as f64) as i32 {
j if j >= image.height() as i32 => image.height() as i32 - 1,
j => j
};
let color_scale = 1.0 / 255.0;
let pixel = image.get_pixel(i as u32, j as u32);
let x = pixel.0[0] as f64 * color_scale;
let y = pixel.0[1] as f64 * color_scale;
let z = pixel.0[2] as f64 * color_scale;
Color::new(x, y, z)
}
}
impl Texture for ImageTexture {
fn value(&self, u: f64, v: f64, _point: &Point3) -> Color {
match &self.image {
Some(i) => ImageTexture::value_from_image(i, u, v),
// If we have no texture data, then return solid cyan as a debugging aid.
_ => Color::new(0.0, 1.0, 1.0)
}
}
}

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@ -12,6 +12,7 @@ use rand::distributions::{Distribution, Uniform};
use rayon::iter::{IntoParallelIterator, ParallelIterator};
use crate::material::{Dielectric, Lambertian, Material, Metal};
use crate::aabb::Aabb;
use crate::image_texture::ImageTexture;
use crate::noise::NoiseTexture;
use crate::perlin::Perlin;
use crate::texture::CheckerTexture;
@ -27,6 +28,20 @@ mod bvh;
mod texture;
mod perlin;
mod noise;
mod image_texture;
fn earth() -> HittableList {
let mut world:HittableList = Vec::new();
let earth_texture = ImageTexture::new("textures/earthmap.jpg");
let earth_material = Arc::new(
Material::Lambertian(Lambertian::textured(Arc::new(earth_texture))));
world.push(Arc::new(Sphere {
center: Point3::new(0.0, 0.0, 0.0),
radius: 2.0,
material: earth_material
}));
world
}
fn two_spheres() -> HittableList {
let mut world:HittableList = Vec::new();
@ -148,7 +163,7 @@ fn main() {
const ASPECT_RATIO: f64 = 3.0 / 2.0;
const IMAGE_WIDTH: usize = 400;
const IMAGE_HEIGHT: usize = (IMAGE_WIDTH as f64 / ASPECT_RATIO) as usize;
const SAMPLES_PER_PIXEL: i32 = 50;
const SAMPLES_PER_PIXEL: i32 = 1;
const MAX_DEPTH: i32 = 50;
let look_from = Point3::new(13.0, 2.0, 3.0);
@ -168,10 +183,11 @@ fn main() {
1.0);
// World
let scene: u8 = 1;
let scene: u8 = 2;
let world = match scene {
0 => two_spheres(),
1 => two_perlin_spheres(),
2 => earth(),
_ => random_scene()
};

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@ -34,4 +34,4 @@ impl Output for PNG {
ImageOutputFormat::Png)
.map_err(|e| Error::new(ErrorKind::Other, e))
}
}
}

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