various improvements

- cleaned up the computation of the camera's matrix
- changed VertexData to being a struct which transmit data between the "vertex shader" and the "fragment shader"
- started working on keyboard and mouse controls
- added fov (field of view)
- changed quaternion to euler angles conversion, from zyx to zxy
- fixed computations of z coordinates in triangle rendering
- improved naming in the triangle rasterizer

1 files changed, 11 insertions, 1 deletions

diff --git a/src/o3d/camera.h b/src/o3d/camera.h
index 27c31eb..832f473 100644
--- a/src/o3d/camera.h
+++ b/src/o3d/camera.h
@@ -1,12 +1,22 @@
 #ifndef O3D_CAMERA_H
 #define O3D_CAMERA_H
 
+#include "math/mat4.h"
 #include "math/tform.h"
 
+using
+    engine::math::Matrix4,
+    engine::math::Transform;
+
 namespace engine::o3d {
 
 struct Camera {
-    engine::math::Transform transform;
+    float fov;
+    Transform transform;
+
+    constexpr Matrix4 to_mat4(float aspect_ratio, float min_z, float max_z) const & {
+        return Matrix4::projection(fov, aspect_ratio, min_z, max_z) * transform.to_inverse_mat4();
+    }
 };
 
 }