Modularize + Refactoring code

engine_math/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "engine_math"
+version = "0.0.1"

engine_math/Cargo.toml

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+[package]
+name = "engine_math"
+version = "0.0.1"
+authors = ["Florian RICHER <florian.richer@unova.fr>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

engine_math/src/lib.rs

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+mod tranform;
+mod vec2;
+
+pub use tranform::Transform;
+pub use vec2::Vec2;

engine_math/src/tranform.rs

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+use super::Vec2;
+
+#[derive(Debug)]
+pub struct Transform {
+    position: Vec2,
+    rotation: Vec2,
+    scale: Vec2
+}
+
+impl Transform {
+    pub fn new() -> Transform {
+        Transform {
+            position: Vec2::new(),
+            rotation: Vec2::new(),
+            scale: Vec2::new()
+        }
+    }
+
+    pub fn get_rotation(&self) -> &Vec2 {
+        &self.rotation
+    }
+
+    pub fn get_position(&self) -> &Vec2 {
+        &self.position
+    }
+
+    pub fn get_scale(&self) -> &Vec2 {
+        &self.scale
+    }
+
+    pub fn translate(&mut self, x: f64, y: f64) {
+        self.position.x += x;
+        self.position.y += y;
+    }
+
+    pub fn rotate(&mut self, x: f64, y: f64) {
+        self.rotation.x += x;
+        self.rotation.y += y;
+    }
+}

engine_math/src/vec2.rs

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+#[derive(Debug)]
+pub struct Vec2 {
+    pub x: f64,
+    pub y: f64
+}
+
+impl Vec2 {
+    pub fn new() -> Vec2 {
+        Vec2 {
+            x: 0.0,
+            y: 0.0
+        }
+    }
+}
+
+impl std::ops::Add<Vec2> for Vec2 {
+    type Output = Vec2;
+
+    fn add(self, b: Vec2) -> Vec2 {
+        Vec2 {
+            x: self.x + b.x,
+            y: self.y + b.y
+        }
+    }
+}
+
+impl std::ops::Sub<Vec2> for Vec2 {
+    type Output = Vec2;
+
+    fn sub(self, b: Vec2) -> Vec2 {
+        Vec2 {
+            x: self.x - b.x,
+            y: self.y - b.y
+        }
+    }
+}