préparation phase 1.1

lib/Cargo.toml

@@ -11,6 +11,8 @@ wgpu = "30.0.0" # Vérifiez la version la plus récente
 winit = "0.29"  # For window management — pinned to match examples
 thiserror = "2"
 bytemuck = { version = "1.25.0", features = ["derive"] }
+glam = "0.33"
+slotmap = "1.0"
 
 [dev-dependencies]
 pollster = { version="0.4.0", features = ["macro"] }

lib/src/lib.rs

@@ -32,6 +32,7 @@ pub mod pipeline;
 pub mod resources;
 pub mod scene;
 pub mod utils;
+pub mod math;
 
 /// Re-export of the high-level application facade for convenient top-level access.
 /// Users create App instances via `AppBuilder`, then call `.run(handler)` to start the application.

lib/src/math/geometry.rs

@@ -0,0 +1,28 @@
+//! # Geometry Module
+//!
+//! Defines the `Geometry` struct for storing vertex data of 3D meshes.
+//! This module handles the core geometric representation used by meshes.
+//!
+//! ## Usage
+//! - Stores vertex attributes (positions, normals, UVs)
+//! - Used by `Mesh` to define its vertex data
+//! - Passed to shaders for rendering
+//!
+//! ## Related Types
+//! - `Geometry`: Main struct for vertex data storage
+//! - Fields: positions, normals, uvs, indices
+
+/// Represents the geometric data of a 3D mesh.
+///
+/// This struct stores the core vertex attributes that define a mesh's shape.
+#[derive(Debug, Clone)]
+pub struct Geometry {
+    /// Vertex positions as an array of 3D coordinates
+    pub positions: Vec<[f32; 3]>,
+    /// Optional vertex normals for lighting calculations
+    pub normals: Option<Vec<[f32; 3]>>,
+    /// Optional texture coordinates for UV mapping
+    pub uvs: Option<Vec<[f32; 2]>>,
+    /// Optional indices for indexed rendering
+    pub indices: Option<Vec<u16>>,
+}

lib/src/math/mod.rs

@@ -0,0 +1,23 @@
+//! # Math Module — Geometric and Transformation Utilities
+//!
+//! Provides core mathematical types and utilities for 3D graphics operations, including:
+//! - `Transform` for object positioning, rotation, and scaling
+//! - `Camera` for view and projection matrix calculations
+//! - `Geometry` for mesh vertex data representation
+//!
+//! ## Interaction with Other Modules
+//! - `scene::Scene` uses `Transform` to manage entity positions
+//! - `renderer::Renderer` uses `Transform` and `Camera` to compute matrices for shaders
+//! - `resources::Mesh` stores vertex data in `Geometry` format
+//!
+//! ## Files
+//! - `transform.rs`: Defines the `Transform` struct and its conversion to matrix form
+//! - `geometry.rs`: Defines the `Geometry` struct for mesh data storage
+//! - `camera.rs`: Defines the `Camera` struct and view/projection matrix calculations
+
+pub mod transform;
+pub mod geometry;
+
+// Re-exports
+pub use transform::Transform;
+pub use geometry::Geometry;

lib/src/math/transform.rs

@@ -0,0 +1,45 @@
+//! # Transform Module
+//!
+//! Defines the `Transform` struct for representing object transformations in 3D space,
+//! including translation, rotation, and scale. Also provides functionality to convert
+//! the transform into a 4x4 matrix for use in shaders.
+//!
+//! ## Usage
+//! - Used by `Scene` entities to define their position in the world
+//! - Converted to `Mat4` for MVP matrix calculations in the renderer
+//!
+//! ## Related Types
+//! - `Transform`: Core struct for position/rotation/scale
+//! - `to_matrix()`: Converts transform to a 4x4 matrix
+
+use glam::{Vec3, Quat, Mat4};
+
+/// Represents a 3D transformation with translation, rotation, and scale.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Transform {
+    /// Translation vector in 3D space
+    pub translation: Vec3,
+    /// Rotation as a quaternion
+    pub rotation: Quat,
+    /// Scale factors along X, Y, Z axes
+    pub scale: Vec3,
+}
+
+impl Transform {
+    /// Creates a new identity transform.
+    pub fn identity() -> Self {
+        Self {
+            translation: Vec3::ZERO,
+            rotation: Quat::IDENTITY,
+            scale: Vec3::ONE,
+        }
+    }
+
+    /// Converts the transform into a 4x4 transformation matrix.
+    ///
+    /// # Returns
+    /// A `Mat4` representing the transformation matrix
+    pub fn to_matrix(&self) -> Mat4 {
+        Mat4::from_scale_rotation_translation(self.scale, self.rotation, self.translation)
+    }
+}

lib/src/resources/camera.rs

@@ -0,0 +1,58 @@
+//! # Camera Module
+//!
+//! Defines the `Camera` struct and related functionality for 3D viewing.
+//! Supports different camera types and projection configurations.
+//!
+//! ## Usage
+//! - Used by `Renderer` to compute view and projection matrices
+//! - Configurable for perspective and orthographic projections
+//! - Supports FPS-style and orbital movement patterns
+//!
+//! ## Related Types
+//! - `Camera`: Main struct for camera configuration
+//! - `view_matrix()`: Computes the view matrix
+//! - `projection_matrix()`: Computes the projection matrix
+
+use glam::{Vec3, Mat4};
+
+/// Represents a 3D camera for viewing the scene.
+///
+/// The camera defines the viewpoint and projection settings for rendering.
+#[derive(Debug, Clone)]
+pub struct Camera {
+    /// Position of the camera in world space
+    pub position: Vec3,
+    /// Target point the camera is looking at
+    pub target: Vec3,
+    /// Up vector defining the camera's orientation
+    pub up: Vec3,
+}
+
+impl Camera {
+    /// Creates a new camera with specified position, target, and up vector.
+    pub fn new(position: Vec3, target: Vec3, up: Vec3) -> Self {
+        Self { position, target, up }
+    }
+
+    /// Computes the view matrix for this camera.
+    ///
+    /// # Returns
+    /// A `Mat4` representing the view transformation matrix
+    pub fn view_matrix(&self) -> Mat4 {
+        Mat4::look_at_rh(self.position, self.target, self.up)
+    }
+
+    /// Computes the projection matrix for this camera.
+    ///
+    /// # Parameters
+    /// - `fov`: Field of view in radians
+    /// - `aspect`: Aspect ratio of the viewport
+    /// - `near`: Near clipping plane distance
+    /// - `far`: Far clipping plane distance
+    ///
+    /// # Returns
+    /// A `Mat4` representing the projection transformation matrix
+    pub fn projection_matrix(&self, fov: f32, aspect: f32, near: f32, far: f32) -> Mat4 {
+        Mat4::perspective_rh_gl(fov, aspect, near, far)
+    }
+}