feat(camera): add projection matrix and accessors

This commit refactors the Camera class to add clarity and better logic:

- Integrates variables directly from constructor to the header for cleaner code
- Adds getters and setters for fov, speed, cameraSensitivity and position
- Duplicates projection matrix from cube to camera
- Adds comments to the header file
- TODO: the projection matrix from the cube loop function must now be replaced by the call to the `glm::mat4 getProjectionMatrix()` camera function

inc/camera.hpp

@@ -9,23 +9,37 @@ struct GLFWwindow;
 class Camera
 {
  private:
-  int screenWidth;
-  int screenHeight;
+  int width;
+  int height;
 
   double mousePosX;
   double mousePosY;
+  // first mouse detection
   bool firstMouse = true;
 
-  float cameraYaw;
-  float cameraPitch;
+  float cameraYaw = -90.f;   // horizontal angle
+  float cameraPitch = 10.f;  // vertical angle
 
-  glm::vec3 cameraFront;
+  // front camera vector (where the camera is pointed.)
+  glm::vec3 cameraFront = glm::vec3(0.f, 0.f, -1.f);
+  // up world vector (absolute up pos)
+  glm::vec3 worldUp = glm::vec3(0.f, 1.f, 0.f);
+
+  // up camera vector (relative up from the camera)
   glm::vec3 cameraUp;
+  // right camera vector (relative right from the camera)
   glm::vec3 cameraRight;
-  glm::vec3 worldUp;
 
+  // camera position
+  glm::vec3 cameraPosition = glm::vec3(0.f, 0.f, 0.f);
+
+  // glfw window
   GLFWwindow* window;
 
+  float speed = 3.f;        // move speed
+  float cameraSensitivity;  // mouse sensitivity
+  float fov = 45.f;         // Field Of View
+
   void processInput(float deltaTime);
   void processMouseMovement();
   void updateCameraVectors();
@@ -34,13 +48,21 @@ class Camera
   Camera(int width, int height, GLFWwindow* window, float sensitivity);
 
   void update(float deltaTime);
-  glm::mat4 getViewMatrix();
 
-  float speed;
-  float cameraSensitivity;
-  float fov;
+  // view matrix
+  glm::mat4 getViewMatrix() const;
+  // projection matrix
+  glm::mat4 getProjectionMatrix() const;
 
-  glm::vec3 cameraPosition;
+  float getFov() const { return fov; }
+  float getSpeed() const { return speed; }
+  float getCameraSensitivity() const { return cameraSensitivity; }
+  glm::vec3 getPosition() const { return cameraPosition; }
+
+  void setSpeed(float newSpeed);
+  void setCameraSensitivity(float newSensitivity);
+  void setFov(float newFov);
+  void setPosition(const glm::vec3& newPosition);
 };
 
 #endif