Huge stuff. camera, input manager (mouse + keyboard), can move around scene now

src/FreeCamera.cpp

@@ -0,0 +1,99 @@
+//
+// Created by slinky on 5/3/26.
+//
+
+#include "FreeCamera.h"
+
+#include "glm/ext/matrix_transform.hpp"
+#include "glm/ext/matrix_clip_space.hpp"
+
+FreeCamera::FreeCamera(const glm::vec3 &pos, float pitch, float yaw, float aspectRatio) : _position(pos), _yaw(yaw), _pitch(pitch), _aspectRatio(aspectRatio) {
+    update_camera_vectors();
+    update_view();
+    update_projection();
+}
+
+const glm::mat4& FreeCamera::view() const {
+    return _view;
+}
+
+const glm::mat4& FreeCamera::projection() const {
+    return _projection;
+}
+
+const glm::vec3& FreeCamera::position() const {
+    return _position;
+}
+
+void FreeCamera::rotate_pitch(float offset) {
+    _pitch += offset;
+
+    if (_pitch < MIN_PITCH) {
+        _pitch = MIN_PITCH;
+    }
+
+    if (_pitch > MAX_PITCH) {
+        _pitch = MAX_PITCH;
+    }
+
+    update_camera_vectors();
+    update_view();
+}
+
+void FreeCamera::rotate_yaw(float offset) {
+    _yaw += offset;
+    update_camera_vectors();
+    update_view();
+}
+
+void FreeCamera::move(CAMERA_MOVEMENT direction, float offset) {
+    glm::vec3 finalDirection = {};
+
+    switch (direction) {
+    case FORWARD:
+        finalDirection = front;
+        break;
+    case BACKWARD:
+        finalDirection = -front;
+        break;
+    case LEFT:
+        finalDirection = -right;
+        break;
+    case RIGHT:
+        finalDirection = right;
+        break;
+    case UP:
+        finalDirection = up;
+        break;
+    case DOWN:
+        finalDirection = -up;
+        break;
+    }
+
+    finalDirection = glm::normalize(finalDirection);
+    _position += finalDirection * offset;
+    _view = glm::lookAt(_position, _position + front, up);
+}
+
+void FreeCamera::update_aspect_ratio(float aspectRatio) {
+    _aspectRatio = aspectRatio;
+    _projection = glm::perspective(glm::radians(75.f), _aspectRatio, 0.1f, 100.0f);
+}
+
+void FreeCamera::update_camera_vectors() {
+    front = {};
+    front.x = cos(glm::radians(_yaw)) * cos(glm::radians(_pitch));
+    front.y = sin(glm::radians(_pitch));
+    front.z = sin(glm::radians(_yaw)) * cos(glm::radians(_pitch));
+
+    right = glm::normalize(glm::cross(front, WORLD_UP));
+    up = glm::normalize(glm::cross(right, front));
+}
+
+void FreeCamera::update_projection() {
+    _projection = glm::perspective(glm::radians(75.f), _aspectRatio, 0.1f, 100.0f);
+}
+
+void FreeCamera::update_view() {
+    _view = glm::lookAt(_position, _position + front, up);
+}