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use std::{fmt, ops};
#[derive(Default, Clone, Copy)]
pub struct Vec3 {
data: [f64; 3],
}
impl Vec3 {
pub fn new(x: f64, y: f64, z: f64) -> Vec3 {
Vec3 { data: [x, y, z] }
}
pub fn x(&self) -> &f64 {
&self.data[0]
}
pub fn y(&self) -> &f64 {
&self.data[1]
}
pub fn z(&self) -> &f64 {
&self.data[2]
}
pub fn length(&self) -> f64 {
f64::sqrt(self.length_squared())
}
pub fn length_squared(&self) -> f64 {
self.data[0] * self.data[0] + self.data[1] * self.data[1] + self.data[2] * self.data[2]
}
pub fn dot(&self, v: &Vec3) -> f64 {
dot(self, v)
}
pub fn cross(&self, v: &Vec3) -> Vec3 {
cross(self, v)
}
pub fn unit_vector(&self) -> Vec3 {
unit_vector(self)
}
pub fn as_color(&self) -> u32 {
let red: u32 = (self.data[0] * 255.0) as u32;
let green: u32 = (self.data[1] * 255.0) as u32;
let blue: u32 = (self.data[2] * 255.0) as u32;
((red as u32) << 16) | ((green as u32) << 8) | blue as u32
}
}
pub fn dot(v1: &Vec3, v2: &Vec3) -> f64 {
v1.data[0] * v2.data[0] + v1.data[1] * v2.data[1] + v1.data[2] * v2.data[2]
}
pub fn cross(v1: &Vec3, v2: &Vec3) -> Vec3 {
Vec3::new(
v1.data[1] * v2.data[2] - v1.data[2] * v2.data[1],
v1.data[2] * v2.data[0] - v1.data[0] * v2.data[2],
v1.data[0] * v2.data[1] - v1.data[1] * v2.data[0],
)
}
pub fn unit_vector(v: &Vec3) -> Vec3 {
v / v.length()
}
impl ops::Add<Vec3> for Vec3 {
type Output = Vec3;
fn add(self, rhs: Vec3) -> Self::Output {
Vec3::new(
self.data[0] + rhs.data[0],
self.data[1] + rhs.data[1],
self.data[2] + rhs.data[2],
)
}
}
impl ops::AddAssign<Vec3> for Vec3 {
fn add_assign(&mut self, rhs: Vec3) {
self.data[0] += rhs.data[0];
self.data[1] += rhs.data[1];
self.data[2] += rhs.data[2];
}
}
impl ops::Sub<Vec3> for Vec3 {
type Output = Vec3;
fn sub(self, rhs: Vec3) -> Self::Output {
Vec3::new(
rhs.data[0] - self.data[0],
rhs.data[1] - self.data[1],
rhs.data[2] - self.data[2],
)
}
}
impl ops::SubAssign for Vec3 {
fn sub_assign(&mut self, rhs: Self) {
self.data[0] -= rhs.data[0];
self.data[1] -= rhs.data[1];
self.data[2] -= rhs.data[2];
}
}
impl ops::Div<f64> for Vec3 {
type Output = Vec3;
fn div(self, rhs: f64) -> Self::Output {
(1.0 / rhs) * self
}
}
impl ops::Div<&Vec3> for f64 {
type Output = Vec3;
fn div(self, rhs: &Vec3) -> Self::Output {
(1.0 / self) * rhs
}
}
impl ops::Div<f64> for &Vec3 {
type Output = Vec3;
fn div(self, rhs: f64) -> Self::Output {
(1.0 / rhs) * self
}
}
impl ops::DivAssign<f64> for Vec3 {
fn div_assign(&mut self, rhs: f64) {
let t = 1.0 / rhs;
self.data[0] *= t;
self.data[1] *= t;
self.data[2] *= t;
}
}
impl ops::Mul<f64> for Vec3 {
type Output = Vec3;
fn mul(self, rhs: f64) -> Self::Output {
Vec3::new(self.data[0] * rhs, self.data[1] * rhs, self.data[2] * rhs)
}
}
impl ops::Mul<&Vec3> for f64 {
type Output = Vec3;
fn mul(self, rhs: &Vec3) -> Self::Output {
Vec3::new(rhs.data[0] * self, rhs.data[1] * self, rhs.data[2] * self)
}
}
impl ops::Mul<Vec3> for Vec3 {
type Output = Vec3;
fn mul(self, rhs: Vec3) -> Self::Output {
Vec3::new(
self.data[0] * rhs.data[0],
self.data[1] * rhs.data[1],
self.data[2] * rhs.data[2],
)
}
}
impl ops::Mul<Vec3> for f64 {
type Output = Vec3;
fn mul(self, rhs: Vec3) -> Self::Output {
rhs * self
}
}
impl ops::MulAssign<f64> for Vec3 {
fn mul_assign(&mut self, rhs: f64) {
self.data[0] *= rhs;
self.data[1] *= rhs;
self.data[2] *= rhs;
}
}
impl ops::Neg for Vec3 {
type Output = Vec3;
fn neg(self) -> Self::Output {
Vec3::new(-self.data[0], -self.data[1], -self.data[2])
}
}
impl fmt::Display for Vec3 {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(
format!(
"x: {}, y: {}, z: {}",
self.data[0], self.data[1], self.data[2]
)
.as_str(),
)
}
}
|
