feat(engine): add support for custom camera implementations

1 files changed, 22 insertions, 12 deletions

diff --git a/engine/src/renderer/mod.rs b/engine/src/renderer/mod.rs
index 593b55f..2c513ff 100644
--- a/engine/src/renderer/mod.rs
+++ b/engine/src/renderer/mod.rs
@@ -7,6 +7,7 @@ use glfw::WindowSize;
 use crate::camera::Camera;
 use crate::color::Color;
 use crate::lighting::LightSource;
+use crate::matrix::Matrix;
 use crate::object::Object;
 use crate::opengl::buffer::{
     ArrayKind as ArrayBufferKind,
@@ -26,14 +27,16 @@ use crate::vector::{Vec2, Vec3};
 use crate::vertex::Vertex;
 
 #[derive(Debug)]
-pub struct Renderer
+pub struct Renderer<CameraT>
 {
-    camera: Camera,
+    camera: CameraT,
 }
 
-impl Renderer
+impl<CameraT> Renderer<CameraT>
+where
+    CameraT: Camera,
 {
-    pub fn new(window: &glfw::Window) -> Result<Self, Error>
+    pub fn new(window: &glfw::Window, camera: CameraT) -> Result<Self, Error>
     {
         gl::load_with(|symbol| {
             let proc_name = unsafe { CString::from_vec_unchecked(symbol.into()) };
@@ -60,8 +63,6 @@ impl Renderer
 
         enable(Capability::DepthTest);
 
-        let camera = Camera::new();
-
         Ok(Self { camera })
     }
 
@@ -116,12 +117,12 @@ impl Renderer
     }
 
     #[must_use]
-    pub fn camera(&self) -> &Camera
+    pub fn camera(&self) -> &CameraT
     {
         &self.camera
     }
 
-    pub fn camera_mut(&mut self) -> &mut Camera
+    pub fn camera_mut(&mut self) -> &mut CameraT
     {
         &mut self.camera
     }
@@ -232,7 +233,7 @@ pub enum Error
 
 fn apply_transformation_matrices(
     object: &Object,
-    camera: &Camera,
+    camera: &impl Camera,
     window_size: &WindowSize,
     shader_program_curr_bound: &CurrentlyBound<ShaderProgram>,
 )
@@ -243,7 +244,7 @@ fn apply_transformation_matrices(
         &object.transform().as_matrix(),
     );
 
-    let view = camera.as_matrix();
+    let view = create_view(camera);
 
     object.renderable().shader_program.set_uniform_matrix_4fv(
         shader_program_curr_bound,
@@ -269,7 +270,7 @@ fn apply_transformation_matrices(
 fn apply_light(
     obj: &Object,
     light_source: Option<&LightSource>,
-    camera: &Camera,
+    camera: &impl Camera,
     shader_program_curr_bound: &CurrentlyBound<ShaderProgram>,
 )
 {
@@ -341,10 +342,19 @@ fn apply_light(
     obj.renderable().shader_program.set_uniform_vec_3fv(
         shader_program_curr_bound,
         cstr!("view_pos"),
-        camera.position(),
+        &camera.position(),
     );
 }
 
+fn create_view(camera: &impl Camera) -> Matrix<f32, 4, 4>
+{
+    let mut view = Matrix::new();
+
+    view.look_at(&camera.position(), &camera.target(), &camera.up());
+
+    view
+}
+
 #[cfg(feature = "debug")]
 #[tracing::instrument(skip_all)]
 fn opengl_debug_message_cb(