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-rw-r--r--src/core/bound3.rs8
-rw-r--r--src/core/vector3.rs13
-rw-r--r--src/main.rs14
-rw-r--r--src/world/hittable.rs3
-rw-r--r--src/world/instancing.rs69
-rw-r--r--src/world/mod.rs3
-rw-r--r--src/world/shapes/sphere.rs27
7 files changed, 114 insertions, 23 deletions
diff --git a/src/core/bound3.rs b/src/core/bound3.rs
index ce6bb09..8c467c0 100644
--- a/src/core/bound3.rs
+++ b/src/core/bound3.rs
@@ -64,6 +64,13 @@ impl<T: Number> Bound3<T> {
let diag = self.max - self.min;
diag.x * diag.y * diag.z
}
+
+ pub fn offset(&self, offset: Vector3<T>) -> Self {
+ Self {
+ min: self.min + offset,
+ max: self.max + offset,
+ }
+ }
}
impl Bound3f {
@@ -86,7 +93,6 @@ impl Bound3f {
/// assert!(!b.intersect(&r3, 0.0, INFTY));
/// ```
pub fn intersect(&self, ray: &Ray, t_min: Float, t_max: Float) -> bool {
- println!("BIN: {} -> {}", self.min, self.max);
// Method stolen from Ray tracing the next week.
// They mention its from pixar
for i in 0..3 {
diff --git a/src/core/vector3.rs b/src/core/vector3.rs
index 1cc6f60..9ba0191 100644
--- a/src/core/vector3.rs
+++ b/src/core/vector3.rs
@@ -2,7 +2,7 @@
//!
//! Also add more 3d math things needed for shading and 3d calculations.
use crate::{Float, Number, NEAR_ZERO};
-use std::ops::{Mul, Sub, Add, DivAssign, Neg, AddAssign, Index};
+use std::ops::{Mul, Sub, Add, Div, DivAssign, Neg, AddAssign, Index};
use std::fmt;
#[derive(Clone, Copy)]
@@ -73,6 +73,17 @@ impl<T: Number> Mul<T> for Vector3<T> {
}
}
+impl<T: Number> Div<T> for Vector3<T> {
+ type Output = Self;
+ fn div(self, op: T) -> Self::Output {
+ Self::Output::new_xyz(
+ self.x / op,
+ self.y / op,
+ self.z / op,
+ )
+ }
+}
+
impl<T: Number> Neg for Vector3<T> {
type Output = Self;
diff --git a/src/main.rs b/src/main.rs
index f98a806..221752b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,5 @@
use rendering::camera::{Camera, Film, CameraSettings};
-use rendering::world::{Scene, Object, shapes::Sphere};
+use rendering::world::{Scene, Object, shapes::Sphere, Instancable};
use rendering::trace::DefaultTracer;
use rendering::core::{Vector2i, Vector3f, Spectrum};
use rendering::render::{RenderContext, RenderCoord};
@@ -31,12 +31,12 @@ fn main() {
let mut scn = Scene::new();
scn.add_objects(vec![
- Object::new(glass, Sphere::new(0.2, Vector3f::new_xyz(0.0, 0.0, -1.0))),
- Object::new(blue, Sphere::new(0.5, Vector3f::new_xyz(1.0, 0.0, -1.5))),
- Object::new(green, Sphere::new(0.3, Vector3f::new_xyz(0.5, 0.0, -2.5))),
- Object::new(brown, Sphere::new(100.0, Vector3f::new_xyz(0.0, -100.5, -1.0))),
- Object::new(metal, Sphere::new(0.2, Vector3f::new_xyz(-0.5, 0.0, -1.0))),
- Object::new(sun, Sphere::new(0.4, Vector3f::new_xyz(-1.0, 3.0, 0.0))),
+ Object::new(glass, Sphere::new(0.2).translate(0.0, 0.0, -1.0)),
+ Object::new(blue, Sphere::new(0.5).translate(1.0, 0.0, -1.5)),
+ Object::new(green, Sphere::new(0.3).translate(0.5, 0.0, -2.5)),
+ Object::new(brown, Sphere::new(100.0).translate(0.0, -100.5, -1.0)),
+ Object::new(metal, Sphere::new(0.2).translate(-0.5, 0.0, -1.0)),
+ Object::new(sun, Sphere::new(0.4).translate(-1.0, 3.0, 0.0)),
]);
let tracer = DefaultTracer::new(&scn, Some(50),
diff --git a/src/world/hittable.rs b/src/world/hittable.rs
index 4fbd3d0..9713c7c 100644
--- a/src/world/hittable.rs
+++ b/src/world/hittable.rs
@@ -1,6 +1,7 @@
use crate::core::{Vector3f, Bound3f, Ray};
use crate::Float;
use crate::material::Material;
+use crate::world::Instancable;
use std::ops::Deref;
@@ -57,3 +58,5 @@ impl Deref for DynHittable {
self.0.as_ref()
}
}
+
+impl Instancable for DynHittable {}
diff --git a/src/world/instancing.rs b/src/world/instancing.rs
new file mode 100644
index 0000000..0a92746
--- /dev/null
+++ b/src/world/instancing.rs
@@ -0,0 +1,69 @@
+use crate::Float;
+use crate::core::{Ray, Vector3f, Bound3f};
+use crate::world::{Hittable, DynHittable, Intersection};
+
+pub struct Instance {
+ inner: DynHittable,
+ translate: Vector3f,
+}
+
+pub trait Instancable: Into<DynHittable> {
+ fn translate(self, x: Float, y: Float, z: Float) -> Instance {
+ self.translate_vec(Vector3f::new_xyz(x, y, z))
+ }
+
+ fn translate_vec(self, offset: Vector3f) -> Instance {
+ Instance::new_translate(self.into(), offset)
+ }
+}
+
+impl Instance {
+ pub fn new_translate(inner: DynHittable, offset: Vector3f) -> Self {
+ Self {
+ inner,
+ translate: offset,
+ }
+ }
+}
+
+impl Hittable for Instance {
+ fn intersect(&self, ray: &Ray) -> Option<Intersection> {
+ let ray = Ray::new(ray.origin - self.translate, ray.direction);
+
+ self.inner.intersect(&ray).map(|mut int| {
+ int.p += &self.translate;
+ int
+ })
+ }
+
+ fn bounding_box(&self) -> Bound3f {
+ self.inner.bounding_box().offset(self.translate)
+ }
+}
+
+impl Into<DynHittable> for Instance {
+ fn into(self) -> DynHittable {
+ DynHittable::new(Box::new(self))
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use crate::world::shapes::Sphere;
+
+ #[test]
+ fn sphere_translation() {
+ //let sph = Sphere::new(2.0).translate(2.0, 3.0, 4.0);
+ let sph = Sphere::new(2.0).translate(2.0, 3.0, 4.0);
+
+ let ray = Ray {
+ origin: Vector3f::new_xyz(1.0, 0.0, 0.0),
+ direction: Vector3f::new_xyz(0.0, 1.0, 1.5).norm(),
+ };
+
+ let dist = sph.intersect(&ray).unwrap();
+ println!("hey {}", dist.t);
+ assert!((dist.t - 3.28).abs() < 0.01);
+ }
+}
diff --git a/src/world/mod.rs b/src/world/mod.rs
index 0779551..dd96b91 100644
--- a/src/world/mod.rs
+++ b/src/world/mod.rs
@@ -4,9 +4,12 @@ pub mod shapes;
mod scene;
pub mod container;
mod hittable;
+mod instancing;
+
pub use scene::*;
pub use hittable::{Intersection, Hittable, DynHittable};
pub use shapes::Shape;
+pub use instancing::{Instance, Instancable};
use std::sync::Arc;
use crate::material::Material;
diff --git a/src/world/shapes/sphere.rs b/src/world/shapes/sphere.rs
index fc2cfe2..36c9d13 100644
--- a/src/world/shapes/sphere.rs
+++ b/src/world/shapes/sphere.rs
@@ -3,35 +3,30 @@
//! Spheres are relatively easy to calculate intersections between
use crate::{Float, NEAR_ZERO};
use crate::core::{Ray, Vector3f, Bound3f};
-use crate::world::{Hittable, DynHittable, Intersection};
+use crate::world::{Hittable, DynHittable, Intersection, Instancable};
pub struct Sphere {
radius: Float,
- center: Vector3f,
}
impl Sphere {
- pub fn new(radius: Float, center: Vector3f) -> Sphere {
+ pub fn new(radius: Float) -> Sphere {
Sphere {
radius,
- center,
}
}
fn norm_at(&self, point: &Vector3f) -> Vector3f {
- let mut v = *point - self.center;
- v /= self.radius;
- v
+ *point / self.radius
}
}
impl Hittable for Sphere {
// Implementation from ray tracing in a weekend
fn intersect(&self, ray: &Ray) -> Option<Intersection> {
- let oc = ray.origin - self.center;
let a = ray.direction.len_squared();
- let half_b = oc.dot(&ray.direction);
- let c = oc.len_squared() - self.radius * self.radius;
+ let half_b = ray.origin.dot(&ray.direction);
+ let c = ray.origin.len_squared() - self.radius * self.radius;
let disc = half_b*half_b - a*c;
if disc < 0.0 {
@@ -67,18 +62,21 @@ impl Hittable for Sphere {
/// use rendering::core::Vector3f;
/// use rendering::world::{Hittable, shapes::Sphere};
///
- /// let sph = Sphere::new(1.0, Vector3f::new(0.0));
+ /// let sph = Sphere::new(1.0);
/// let b = sph.bounding_box();
///
/// assert!(b.min.x == -1.0 && b.min.y == -1.0 && b.min.z == -1.0);
/// assert!(b.max.x == 1.0 && b.max.y == 1.0 && b.max.z == 1.0);
+ /// ```
fn bounding_box(&self) -> Bound3f {
let offset = Vector3f::new(self.radius);
- Bound3f::new(self.center - offset, self.center + offset)
+ Bound3f::new(-offset, offset)
}
}
+impl Instancable for Sphere {}
+
impl Into<DynHittable> for Sphere {
fn into(self) -> DynHittable {
DynHittable::new(Box::new(self))
@@ -91,7 +89,7 @@ mod tests {
#[test]
fn sphere_intersect() {
- let sph = Sphere::new(2.0, Vector3f::new_xyz(2.0, 3.0, 4.0));
+ let sph = Sphere::new(2.0);
let ray = Ray {
origin: Vector3f::new_xyz(1.0, 0.0, 0.0),
@@ -99,6 +97,7 @@ mod tests {
};
let dist = sph.intersect(&ray).unwrap();
- assert!((dist.t - 3.28).abs() < 0.01);
+ println!("Yay {}", dist.t);
+ assert!((dist.t - 1.732).abs() < 0.01);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 03:39:13 +0000