feat: establish stable OpenGL 3.3 core graphics conxtext

initializes the full graphics context pipeline required for modern OpenGL rendering

src/engine/renderer/camera/camera.h

@@ -15,11 +15,26 @@ typedef struct {
     vec3 Up;
     float speed;
     float sensitivity;
+    float FOV_deg;
     int width;
     int height;
+    mat4 View; // cache for the calculated View Matrix
 } Camera;
 
-void matrix(float FOVdeg, float nearPlane, float farPlane, Shader* shader_instance, const char* uniform);
-void inputs(SDL_Window* window);
+// initializer
+void camera_init(Camera *self, vec3 initial_position, int width, int height);
+
+/* --- Matrix calculation functions --- */
+// Updates self->View matrix based on pos, orientation and up
+void camera_update_view_matrix(Camera *self);
+
+// calculates the projection matrix for a given set of planes
+void camera_update_projection(Camera *self, float nearPlane, float forPlane, mat4 dest);
+
+// generates (projection * view) and uploads to the shader program
+void camera_matrix_to_shader(Camera *self, GLuint shader_program_ID, const char *uniform_name);
+
+// TODO: Input handling (needs full SDL context later)
+void camera_inputs(Camera *self, SDL_Event *event);
 
 #endif //CAMERA_H