feat(loader): implemented faces and vertex extractors for Model

README.md

@@ -2,6 +2,6 @@
 Lithium is a small Real-Time 3D renderer written in rust.
 It is not meant for real world usage, but for learning about 3D rendering.
 
-# License
+## License
 Lithium is licensed under the MIT open source license.
 Check the `LICENSE` file for more info.

lithium-loader/Cargo.lock

@@ -2,10 +2,17 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anyhow"
+version = "1.0.75"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
+
 [[package]]
 name = "lithium-loader"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "lithium-utils",
 ]
 

lithium-loader/Cargo.toml

@@ -9,3 +9,5 @@ authors = ["antifallobst"]
 
 [dependencies]
 lithium-utils = { path = "../lithium-utils" }
+
+anyhow = "1.0.75"

lithium-loader/src/lib.rs

@@ -1,3 +1,4 @@
+use anyhow::Result;
 use lithium_utils::{Vector2, Vector3};
 
 pub struct Vertex {
@@ -53,4 +54,12 @@ impl Model {
             faces,
         }
     }
+
+    pub fn faces(&self) -> &Vec<(u32, u32, u32)> {
+        &self.faces
+    }
+
+    pub fn vertex(&self, id: u32) -> Option<&Vertex> {
+        self.vertices.get(id as usize)
+    }
 }

lithium-utils/src/lib.rs

@@ -1,6 +1,26 @@
+use std::ops::{Add, Sub};
+
 pub struct Vector2 {
-    x: f32,
-    y: f32,
+    pub x: f32,
+    pub y: f32,
+}
+
+impl Default for Vector2 {
+    fn default() -> Self {
+        Self { x: 0_f32, y: 0_f32 }
+    }
+}
+
+impl Vector2 {
+    pub fn new(x: f32, y: f32) -> Self {
+        Self { x, y }
+    }
+}
+
+pub struct Vector3 {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
 }
 
 impl Default for Vector3 {
@@ -13,21 +33,25 @@ impl Default for Vector3 {
     }
 }
 
-impl Vector2 {
-    pub fn new(x: f32, y: f32) -> Self {
-        Self { x, y }
+impl Add for Vector3 {
+    type Output = Self;
+    fn add(self, rhs: Self) -> Self::Output {
+        Self::Output {
+            x: self.x + rhs.x,
+            y: self.y + rhs.y,
+            z: self.z + rhs.z,
+        }
     }
 }
 
-pub struct Vector3 {
-    x: f32,
-    y: f32,
-    z: f32,
-}
-
-impl Default for Vector2 {
-    fn default() -> Self {
-        Self { x: 0_f32, y: 0_f32 }
+impl Sub for Vector3 {
+    type Output = Vector3;
+    fn sub(self, rhs: Self) -> Self::Output {
+        Self::Output {
+            x: self.x - rhs.x,
+            y: self.y - rhs.y,
+            z: self.z - rhs.z,
+        }
     }
 }