Some changes

src/geometry.rs

@@ -34,16 +34,16 @@ pub enum Geometry {
 }
 
 impl Geometry {
-    pub fn greet(&self) {
+    pub fn draw(&self) {
         match self {
             Geometry::Sphere(_) => {
-                println!("Sphere!");
+                println!("Drawing Sphere!");
             }
             Geometry::Line(_) => {
-                println!("Line!");
+                println!("Drawing Line!");
             }
             Geometry::Plane(_) => {
-                println!("Plane!");
+                println!("Drawing Plane!");
             }
         }
     }

src/main.rs

@@ -1,31 +1,31 @@
-use hello::geometry::{self, Geometry, Sphere};
-use hello::math::{Mat4x4, Point3};
+use hello::geometry::{Geometry, Line, Plane, Sphere};
+use hello::math::{Mat4x4, Point3, Vector3};
 
 use std::rc::Rc;
 
 #[derive(Clone)]
-struct RGB {
-    red: f64,
-    green: f64,
-    blue: f64,
+struct RGB<T> {
+    red: T,
+    green: T,
+    blue: T,
 }
 
 #[derive(Clone)]
-struct Texture {
+struct Texture<T> {
     width: usize,
     height: usize,
-    pixel: Vec<RGB>,
+    pixel: Vec<RGB<T>>,
 }
 
-impl Texture {
-    fn load_texture() -> Texture {
+impl Texture<f64> {
+    fn load_texture() -> Texture<f64> {
         let width = 640;
         let height = 480;
 
         let mut pixel = Vec::new();
 
-        for x in 0..width {
-            for y in 0..height {
+        for _ in 0..width {
+            for _ in 0..height {
                 pixel.push(RGB {
                     red: 1.0,
                     green: 1.0,
@@ -45,11 +45,11 @@ impl Texture {
 struct RenderableGeometry {
     transform: Mat4x4,
     geometry: Geometry,
-    texture: Rc<Texture>,
+    texture: Rc<Texture<f64>>,
 }
 
 impl RenderableGeometry {
-    fn new(transform: Mat4x4, geometry: Geometry, texture: Rc<Texture>) -> RenderableGeometry {
+    fn new(transform: Mat4x4, geometry: Geometry, texture: Rc<Texture<f64>>) -> RenderableGeometry {
         RenderableGeometry {
             transform,
             geometry,
@@ -58,11 +58,48 @@ impl RenderableGeometry {
     }
 }
 
+trait Renderable {
+    fn render(&self);
+}
+
+impl Renderable for Sphere {
+    fn render(&self) {
+        println!("Rendering Sphere!");
+    }
+}
+
+impl Renderable for Plane {
+    fn render(&self) {
+        println!("Rendering Plane!");
+    }
+}
+
+impl Renderable for Line {
+    fn render(&self) {
+        println!("Rendering Line!");
+    }
+}
+
 fn main() {
     let tex = Rc::new(Texture::load_texture());
 
     let sphere = Geometry::Sphere(Sphere::new(Point3::new(0.0, 0.0, 0.0), 1.0));
-    sphere.greet();
+    let geometries = vec![sphere];
+
+    for g in geometries {
+        g.draw();
+    }
+
+    let mut renderables: Vec<Box<dyn Renderable>> = Vec::new();
+    renderables.push(Box::new(Sphere::new(Point3::new(0.0, 0.0, 0.0), 1.0)));
+    renderables.push(Box::new(Plane::new(
+        Point3::new(0.0, 0.0, 0.0),
+        Vector3::new(0.0, 1.0, 0.0),
+    )));
+
+    for r in renderables {
+        r.render();
+    }
 
     let geo1 = RenderableGeometry::new(
         Mat4x4::ident(),

src/math.rs

@@ -1,62 +1,78 @@
 use std::ops::{Add, Div, Mul, Sub};
 
 #[derive(Copy, Clone, PartialEq, Debug)]
-pub struct Vector3 {
-    x: f64,
-    y: f64,
-    z: f64,
+pub struct Vector3<T> {
+    x: T,
+    y: T,
+    z: T,
 }
 
-impl Vector3 {
-    pub fn new(x: f64, y: f64, z: f64) -> Vector3 {
+impl<T> Vector3<T> {
+    pub fn new(x: T, y: T, z: T) -> Vector3<T> {
         Vector3 { x, y, z }
     }
 }
 
-impl Add for Vector3 {
-    type Output = Vector3;
+impl<T> Add for Vector3<T>
+where
+    T: Add<Output = T>,
+{
+    type Output = Vector3<T>;
 
-    fn add(self, rhs: Vector3) -> Self::Output {
+    fn add(self, rhs: Vector3<T>) -> Self::Output {
         Vector3::new(self.x + rhs.x, self.y + rhs.y, self.z + rhs.z)
     }
 }
 
-impl Sub for Vector3 {
-    type Output = Vector3;
+impl<T> Sub for Vector3<T>
+where
+    T: Sub<Output = T>,
+{
+    type Output = Vector3<T>;
 
-    fn sub(self, rhs: Vector3) -> Self::Output {
+    fn sub(self, rhs: Vector3<T>) -> Self::Output {
         Vector3::new(self.x - rhs.x, self.y - rhs.y, self.z - rhs.z)
     }
 }
 
-impl Mul<f64> for Vector3 {
-    type Output = Vector3;
+impl<T> Mul<T> for Vector3<T>
+where
+    T: Mul<Output = T> + Clone + Copy,
+{
+    type Output = Vector3<T>;
 
-    fn mul(self, rhs: f64) -> Self::Output {
+    fn mul(self, rhs: T) -> Self::Output {
         Vector3::new(self.x * rhs, self.y * rhs, self.z * rhs)
     }
 }
 
-impl Mul<Vector3> for f64 {
-    type Output = Vector3;
+/*
+impl<T> Mul<Vector3<T>> for f64 {
+    type Output = Vector3<T>;
 
-    fn mul(self, rhs: Vector3) -> Self::Output {
+    fn mul(self, rhs: Vector3<T>) -> Self::Output {
         Vector3::new(self * rhs.x, self * rhs.y, self * rhs.z)
     }
-}
+}*/
 
-impl Mul for Vector3 {
-    type Output = f64;
+impl<T> Mul for Vector3<T>
+where
+    T: Mul<Output = T> + Add<Output = T>,
+{
+    type Output = T;
 
-    fn mul(self, rhs: Vector3) -> Self::Output {
+    fn mul(self, rhs: Vector3<T>) -> Self::Output {
         self.x * rhs.x + self.y * rhs.y + self.z * rhs.z
     }
 }
 
-impl Div<f64> for Vector3 {
-    type Output = Vector3;
+impl<T> Div<T> for Vector3<T>
+where
+    T: Div<Output = T> + Copy + Clone,
+{
+    type Output = Vector3<T>;
 
-    fn div(self, rhs: f64) -> Self::Output {
+    fn div(self, rhs: T) -> Self::Output {
         Vector3::new(self.x / rhs, self.y / rhs, self.z / rhs)
     }
 }
@@ -74,16 +90,16 @@ impl Point3 {
     }
 }
 
-impl Add<Vector3> for Point3 {
+impl Add<Vector3<T>> for Point3 {
     type Output = Point3;
 
-    fn add(self, rhs: Vector3) -> Self::Output {
+    fn add(self, rhs: Vector3<T>) -> Self::Output {
         Point3::new(self.x + rhs.x, self.y + rhs.y, self.z + rhs.z)
     }
 }
 
 impl Sub for Point3 {
-    type Output = Vector3;
+    type Output = Vector3<T>;
 
     fn sub(self, rhs: Point3) -> Self::Output {
         Vector3::new(self.x - rhs.x, self.y - rhs.y, self.z - rhs.z)