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Added box primitive

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This commit is contained in:
STP
2023-11-12 13:48:25 -05:00
parent 1b708049a9
commit 0daa6defb9
1 changed files with 141 additions and 30 deletions
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171
src/primitive.rs
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@@ -41,27 +41,29 @@ struct BoundingBox {
bln: Point3<f32>,
trf: Point3<f32>,
}
impl BoundingBox {
fn new(bln: Point3<f32>, trf: Point3<f32>) -> Self {
BoundingBox { bln, trf }
}
fn intersect_bounding_box(
&self,
position: &Vector3<f32>,
direction: &Vector3<f32>,
) -> Option<&Self> {
unimplemented!()
}
fn distance_to_point(&self, point: &Vector3<f32>) -> f32 {
unimplemented!()
}
fn update(&self, bln: Point3<f32>, trf: Point3<f32>) {
unimplemented!()
fn intersect_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
let t1 = (self.bln - ray.a).component_div(&ray.b);
let t2 = (self.trf - ray.a).component_div(&ray.b);
let tmin = t1.inf(&t2).min();
let tmax = t1.sup(&t2).max();
if tmax >= tmin {
Some(ray.at_t(tmin))
} else {
None
}
}
}
// PRIMITIVE TRAIT -----------------------------------------------------------------
trait Primitive<'a> {
fn intersect_ray(&self, ray: &Ray) -> Option<Intersection>;
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>>;
fn get_material(self) -> &'a Material;
}
@@ -131,6 +133,10 @@ impl<'a> Primitive<'a> for Sphere<'a> {
fn get_material(self) -> &'a Material {
self.material
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
return self.bounding_box.intersect_bounding_box(ray);
}
}
// CIRCLE -----------------------------------------------------------------
@@ -206,6 +212,10 @@ impl<'a> Primitive<'a> for Circle<'a> {
fn get_material(self) -> &'a Material {
self.material
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
self.bounding_box.intersect_bounding_box(ray)
}
}
// CYLINDER -----------------------------------------------------------------
@@ -228,6 +238,10 @@ impl<'a> Primitive<'a> for Cylinder<'a> {
fn get_material(self) -> &'a Material {
todo!()
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
todo!()
}
}
// CONE -----------------------------------------------------------------
@@ -235,24 +249,28 @@ struct Cone<'a> {
radius: f32,
base: f32,
height: f32,
circle: &'a Circle<'a>,
circle: Circle<'a>,
material: &'a Material,
bounding_box: BoundingBox,
}
impl<'a> Cone<'a> {
fn new(radius: f32, height: f32, base: f32, material: &'a Material) -> Self {
let circle = Arc::new(Circle::new(
Point3::new(0.0, -base, 0.0),
let circle = Circle::new(
Point3::new(0.0, base, 0.0),
radius,
Vector3::new(0.0, 1.0, 0.0),
&material,
));
);
let bln = Point3::new(-radius, base, -radius);
let trf = Point3::new(radius, base + height, radius);
Cone {
radius,
base,
height,
circle: Arc::clone(&circle),
circle,
material,
bounding_box: BoundingBox { bln, trf },
}
}
fn unit() -> Self {
@@ -264,7 +282,7 @@ impl<'a> Cone<'a> {
let h = self.height;
let (x, y, z) = (intersect.x, intersect.y, intersect.z);
let normal = Vector3::new(2.0 * x, 2.0 * r * r * (h - y), 2.0 * z).normalize();
return normal;
normal
}
}
@@ -314,23 +332,27 @@ impl<'a> Primitive<'a> for Cone<'a> {
let circle_intersect = self.circle.intersect_ray(ray);
match (cone_intersect, circle_intersect) {
(None, None) => return None,
(Some(cone_intersect), None) => return Some(cone_intersect),
(None, Some(circle_intersect)) => return Some(circle_intersect),
(None, None) => None,
(Some(cone_intersect), None) => Some(cone_intersect),
(None, Some(circle_intersect)) => Some(circle_intersect),
(Some(cone_intersect), Some(circle_intersect)) => {
let circle_distance = distance(&ray.a, &circle_intersect.point);
let cone_distance = distance(&ray.a, &cone_intersect.point);
match cone_distance < circle_distance {
true => return Some(cone_intersect),
false => return Some(circle_intersect),
true => Some(cone_intersect),
false => Some(circle_intersect),
}
}
};
}
}
fn get_material(self) -> &'a Material {
self.material
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
self.bounding_box.intersect_bounding_box(ray)
}
}
// RECTANGLE -----------------------------------------------------------------
@@ -341,17 +363,23 @@ struct Rectangle<'a> {
material: &'a Material,
width: f32,
height: f32,
bounding_box: BoundingBox,
}
impl Rectangle<'_> {
impl<'a> Rectangle<'a> {
fn new(
position: Point3<f32>,
normal: Vector3<f32>,
width_direction: Vector3<f32>,
width: f32,
height: f32,
material: &Material,
material: &'a Material,
) -> Self {
let normal = normal.normalize();
let width_direction = width_direction.normalize();
let height_direction = width_direction.cross(&normal);
let bln = position - width / 2.0 * width_direction - height / 2.0 * height_direction;
let trf = position + width / 2.0 * width_direction + height / 2.0 * height_direction;
Rectangle {
position,
normal: normal.normalize(),
@@ -359,6 +387,7 @@ impl Rectangle<'_> {
width,
height,
material,
bounding_box: BoundingBox { bln, trf },
}
}
fn unit() -> Self {
@@ -368,7 +397,7 @@ impl Rectangle<'_> {
Vector3::new(1.0, 0.0, 0.0),
2.0,
2.0,
&Material::magenta(),
&MAGENTA_MATERIAL,
)
}
}
@@ -403,21 +432,95 @@ impl<'a> Primitive<'a> for Rectangle<'a> {
fn get_material(self) -> &'a Material {
self.material
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
self.bounding_box.intersect_bounding_box(ray)
}
}
// BOX -----------------------------------------------------------------
struct Box<'a> {
width: f32,
height: f32,
depth: f32,
material: &'a Material,
bounding_box: BoundingBox,
}
impl<'a> Box<'a> {
fn new(width: f32, height: f32, depth: f32, material: &'a Material) -> Self {
let trf = Point3::new(width / 2.0, height / 2.0, depth / 2.0);
let bln = Point3::new(-width / 2.0, -height / 2.0, -depth / 2.0);
Box {
width,
height,
depth,
material,
bounding_box: BoundingBox { bln, trf },
}
}
fn unit() -> Self {
Box::new(2.0, 2.0, 2.0, &MAGENTA_MATERIAL)
}
}
impl Box<'_> {}
impl<'a> Primitive<'a> for Box<'a> {
fn intersect_ray(&self, ray: &Ray) -> Option<Intersection> {
todo!()
// Compute the minimum and maximum t-values for each axis of the bounding box
let inv_dir = Vector3::new(1.0 / ray.b.x, 1.0 / ray.b.y, 1.0 / ray.b.z);
let t1 = (self.bounding_box.bln - ray.a).component_mul(&inv_dir);
let t2 = (self.bounding_box.trf - ray.a).component_mul(&inv_dir);
// Find the largest minimum t-value and the smallest maximum t-value among the axes
let tmin = t1.inf(&t2).max();
let tmax = t1.sup(&t2).min();
// Check if there's an intersection between tmin and tmax
if tmax >= tmin {
// The ray intersects the box, and tmin is the entry point, tmax is the exit point
let intersect = ray.at_t(tmin);
// Check if the intersection is outside the box
if intersect.x < -self.width / 2.0
|| intersect.x > self.width / 2.0
|| intersect.y < -self.height / 2.0
|| intersect.y > self.height / 2.0
|| intersect.z < -self.depth / 2.0
|| intersect.z > self.depth / 2.0
{
return None; // Intersection is outside the box
}
//Get normal of intersection point
let normal = if tmin == t1.x {
Vector3::new(-1.0, 0.0, 0.0)
} else if tmin == t1.y {
Vector3::new(0.0, -1.0, 0.0)
} else if tmin == t1.z {
Vector3::new(0.0, 0.0, -1.0)
} else if tmin == t2.x {
Vector3::new(1.0, 0.0, 0.0)
} else if tmin == t2.y {
Vector3::new(0.0, 1.0, 0.0)
} else {
Vector3::new(0.0, 0.0, 1.0)
};
Some(Intersection {
point: intersect,
normal,
})
} else {
None // No intersection with the box
}
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
self.bounding_box.intersect_bounding_box(ray)
}
fn get_material(self) -> &'a Material {
todo!()
self.material
}
}
@@ -436,6 +539,10 @@ impl<'a> Primitive<'a> for Triangle<'a> {
fn get_material(self) -> &'a Material {
todo!()
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
todo!()
}
}
// MESH -----------------------------------------------------------------
@@ -451,4 +558,8 @@ impl<'a> Primitive<'a> for Mesh<'a> {
fn get_material(self) -> &'a Material {
todo!()
}
fn interesct_bounding_box(&self, ray: &Ray) -> Option<Point3<f32>> {
todo!()
}
}