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spheres: cache inverse transform to accelerate normal_at.

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This commit is contained in:
Bill Thiede
2021-07-17 23:10:54 -07:00
parent 5f3bfd744e
commit 2395c96e01
4 changed files with 46 additions and 30 deletions
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5
rtchallenge/examples/eoc5.rs
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@@ -20,8 +20,9 @@ fn main() -> Result<()> {
let half = wall_size / 2.;
let color = Color::new(1., 0., 0.);
let mut shape = Sphere::default();
shape.transform =
Matrix4x4::shearing(1., 0., 0., 0., 0., 0.) * Matrix4x4::scaling(0.5, 1., 1.0);
shape.set_transform(
Matrix4x4::shearing(1., 0., 0., 0., 0., 0.) * Matrix4x4::scaling(0.5, 1., 1.0),
);
for y in 0..h {
let world_y = half - pixel_size * y as f32;

35
rtchallenge/examples/eoc7.rs
View File

@@ -16,8 +16,8 @@ use rtchallenge::{
fn main() -> Result<()> {
let start = Instant::now();
let width = 640;
let height = 480;
let width = 1024;
let height = 1024;
let light_position = Tuple::point(-10., 10., -10.);
let light_color = WHITE;
let light = PointLight::new(light_position, light_color);
@@ -28,7 +28,7 @@ fn main() -> Result<()> {
camera.transform = view_transform(from, to, up);
let mut floor = Sphere::default();
floor.transform = Matrix4x4::scaling(10., 0.01, 10.);
floor.set_transform(Matrix4x4::scaling(10., 0.01, 10.));
floor.material = Material {
color: Color::new(1., 0.9, 0.9),
specular: 0.,
@@ -36,21 +36,25 @@ fn main() -> Result<()> {
};
let mut left_wall = Sphere::default();
left_wall.transform = Matrix4x4::translation(0., 0., 5.)
* Matrix4x4::rotation_y(-PI / 4.)
* Matrix4x4::rotation_x(PI / 2.)
* Matrix4x4::scaling(10., 0.01, 10.);
left_wall.set_transform(
Matrix4x4::translation(0., 0., 5.)
* Matrix4x4::rotation_y(-PI / 4.)
* Matrix4x4::rotation_x(PI / 2.)
* Matrix4x4::scaling(10., 0.01, 10.),
);
left_wall.material = floor.material.clone();
let mut right_wall = Sphere::default();
right_wall.transform = Matrix4x4::translation(0., 0., 5.)
* Matrix4x4::rotation_y(PI / 4.)
* Matrix4x4::rotation_x(PI / 2.)
* Matrix4x4::scaling(10., 0.01, 10.);
right_wall.set_transform(
Matrix4x4::translation(0., 0., 5.)
* Matrix4x4::rotation_y(PI / 4.)
* Matrix4x4::rotation_x(PI / 2.)
* Matrix4x4::scaling(10., 0.01, 10.),
);
right_wall.material = floor.material.clone();
let mut middle = Sphere::default();
middle.transform = Matrix4x4::translation(-0.5, 1., 0.5);
middle.set_transform(Matrix4x4::translation(-0.5, 1., 0.5));
middle.material = Material {
color: Color::new(0.1, 1., 0.5),
diffuse: 0.7,
@@ -59,7 +63,7 @@ fn main() -> Result<()> {
};
let mut right = Sphere::default();
right.transform = Matrix4x4::translation(1.5, 0.5, -0.5) * Matrix4x4::scaling(0.5, 0.5, 0.5);
right.set_transform(Matrix4x4::translation(1.5, 0.5, -0.5) * Matrix4x4::scaling(0.5, 0.5, 0.5));
right.material = Material {
color: Color::new(0.5, 1., 0.1),
diffuse: 0.7,
@@ -68,8 +72,9 @@ fn main() -> Result<()> {
};
let mut left = Sphere::default();
left.transform =
Matrix4x4::translation(-1.5, 0.33, -0.75) * Matrix4x4::scaling(0.33, 0.33, 0.33);
left.set_transform(
Matrix4x4::translation(-1.5, 0.33, -0.75) * Matrix4x4::scaling(0.33, 0.33, 0.33),
);
left.material = Material {
color: Color::new(1., 0.8, 0.1),
diffuse: 0.7,