feat: add Spectator Mode

include/Cubed/app.hpp

@@ -17,6 +17,7 @@ public:
     static void mouse_button_callback(GLFWwindow* window, int button, int action, int mods);
     static void window_focus_callback(GLFWwindow* window, int focused);
     static void window_reshape_callback(GLFWwindow* window, int new_width, int new_height);
+    static void mouse_scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 
     static int start_cubed_application(int argc, char** argv);
     static unsigned int seed();

include/Cubed/gameplay/game_mode.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <stdexcept>
+#include <string>
+enum class GameMode {
+    CREATIVE,
+    SPECTATOR
+};
+
+inline std::string to_str(GameMode mode) {
+    using enum GameMode;
+    switch (mode) {
+        case CREATIVE:
+            return {"Creative"};
+        case SPECTATOR:
+            return {"Spective"};
+    }
+    throw std::invalid_argument{"GameMode is invaild"};
+}

include/Cubed/gameplay/player.hpp

@@ -5,6 +5,7 @@
 #include <Cubed/config.hpp>
 #include <Cubed/gameplay/block.hpp>
 #include <Cubed/gameplay/chunk_pos.hpp>
+#include <Cubed/gameplay/game_mode.hpp>
 #include <Cubed/input.hpp>
 
 #include <optional>
@@ -19,6 +20,7 @@ class World;
 
 class Player {
 private:
+    using enum GameMode;
     constexpr static float WALK_SPEED = 4.5f;
     constexpr static float RUN_SPEED = 7.0f;
     constexpr static float ACCELERATION = 10.0f;   
@@ -54,7 +56,7 @@ private:
 
     Gait m_gait = Gait::WALK;
     MoveState m_move_state {};
-
+    GameMode m_game_mode = CREATIVE;
     std::optional<LookBlock> m_look_block = std::nullopt;
     std::string m_name {};
     World& m_world;
@@ -79,10 +81,11 @@ public:
     const glm::vec3& get_player_pos() const;
     const MoveState& get_move_state() const;
     
+    void change_mode(GameMode mode);
     void set_player_pos(const glm::vec3& pos);
     void update(float delta_time);
     void update_front_vec(float offset_x, float offset_y);
     void update_player_move_state(int key, int action);
-
+    void update_scroll(double yoffset);
 
 };

src/app.cpp

@@ -39,7 +39,7 @@ void App::init() {
     glfwSetWindowFocusCallback(m_window.get_glfw_window(), window_focus_callback);
     glfwSetWindowSizeCallback(m_window.get_glfw_window(), window_reshape_callback);
     glfwSetKeyCallback(m_window.get_glfw_window(), key_callback);
-
+    glfwSetScrollCallback(m_window.get_glfw_window(), mouse_scroll_callback);
     PerlinNoise::init();
     
     m_renderer.init();
@@ -132,7 +132,11 @@ void App::window_reshape_callback(GLFWwindow* window, int new_width, int new_hei
     app->m_window.update_viewport();
 }
 
-
+void App::mouse_scroll_callback(GLFWwindow* window, double xoffset, double yoffset) {
+    App* app = static_cast<App*>(glfwGetWindowUserPointer(window));
+    auto& player = app->m_world.get_player("TestPlayer");
+    player.update_scroll(yoffset);
+}
 
 void App::render() {
 

src/debug_collector.cpp

@@ -22,6 +22,7 @@ void DebugCollector::init_text() {
     Text gpu_text("gpu");
     Text opengl_version_text("opengl_version");
     Text biome_text("biome");
+    Text speed_text("speed");
     version_text
         .position(0.0f, 100.0f)
         .scale(0.8f)
@@ -73,6 +74,10 @@ void DebugCollector::init_text() {
         .text("Biome: ")
         .scale(0.8f)
         .position(0.0f, 500.0f);
+    speed_text
+        .text("Speed: 0 m/s")
+        .scale(0.8f)
+        .position(0.0f, 550.0f);
     m_texts.insert({version_text.uuid(), std::move(version_text)});
     m_texts.insert({fps_text.uuid(), std::move(fps_text)});
     m_texts.insert({player_pos_text.uuid(), std::move(player_pos_text)});
@@ -83,6 +88,7 @@ void DebugCollector::init_text() {
     m_texts.insert({gpu_text.uuid(), std::move(gpu_text)});
     m_texts.insert({opengl_version_text.uuid(), std::move(opengl_version_text)});
     m_texts.insert({biome_text.uuid(), std::move(biome_text)});
+    m_texts.insert({speed_text.uuid(), std::move(speed_text)});
 }
 
 std::unordered_map<std::size_t, Text>& DebugCollector::all_texts() {

src/gameplay/player.cpp

@@ -7,7 +7,6 @@
 #include <Cubed/tools/log.hpp>
 #include <GLFW/glfw3.h>
 
-
 Player::Player(World& world, const std::string& name) :
     m_world(world),
     m_name(name)    
@@ -131,19 +130,34 @@ bool Player::ray_cast(const glm::vec3& start, const glm::vec3& front, glm::ivec3
     return false;
 }
 
+void Player::change_mode(GameMode mode) {
+    m_game_mode = mode;
+    Logger::info("Change GameMode to {}", to_str(mode));
+    if (mode == CREATIVE) {
+        is_fly = false;
+        m_gait = Gait::WALK;
+    } else if (mode == SPECTATOR) {
+        is_fly = true;
+        m_gait = Gait::RUN;
+    }
+}
 
 void Player::set_player_pos(const glm::vec3& pos) {
     m_player_pos = pos;
 }
 
 void Player::update(float delta_time) {
+
     update_move(delta_time);
     update_lookup_block();
     check_player_chunk_transition();
 
-    std::string player_pos = std::format("x: {:.2f} y: {:.2f} z: {:.2f}", m_player_pos.x, m_player_pos.y, m_player_pos.z);
-    DebugCollector::get().report("player_pos", player_pos);
+    DebugCollector::get().report("player_pos",
+        std::format("x: {:.2f} y: {:.2f} z: {:.2f}",
+            m_player_pos.x, m_player_pos.y, m_player_pos.z
+        ));
     
+    DebugCollector::get().report("speed", std::format("Speed: {:.2} m/s", speed));
 }
 
 void Player::update_player_move_state(int key, int action) {
@@ -154,7 +168,10 @@ void Player::update_player_move_state(int key, int action) {
             }
             if (action == GLFW_RELEASE) {
                 m_move_state.forward = false;
-                m_gait = Gait::WALK;
+                if (m_game_mode != SPECTATOR) {
+                    m_gait = Gait::WALK;
+                }
+                
             }
             break;
         case GLFW_KEY_S:
@@ -185,8 +202,10 @@ void Player::update_player_move_state(int key, int action) {
             if (action == GLFW_PRESS) {
                 m_move_state.up = true;
                 if (space_on) {
-                    is_fly = !is_fly ? true : false;
-                    y_speed = 0.0f;
+                    if (m_game_mode == CREATIVE) {
+                        is_fly = !is_fly ? true : false;
+                        y_speed = 0.0f;
+                    }
                     space_on = false;
                     space_on_time = 0.0f;
                 } else {
@@ -210,6 +229,15 @@ void Player::update_player_move_state(int key, int action) {
                 m_gait = Gait::RUN;
             }
             break;
+        case GLFW_KEY_F4:
+            if (action == GLFW_PRESS) {
+                if (m_game_mode == CREATIVE) {
+                    change_mode(SPECTATOR);
+                } else {
+                    change_mode(CREATIVE);
+                }
+            }
+            break;
     }
 }
 
@@ -318,11 +346,13 @@ void Player::update_move(float delta_time) {
     if (delta_time > 1.0f) {
         return;
     }
-    if (m_gait == Gait::RUN) {
-        max_speed = RUN_SPEED;
-    }
-    if (m_gait == Gait::WALK) {
-        max_speed = WALK_SPEED;
+    if (m_game_mode != SPECTATOR) {
+        if (m_gait == Gait::RUN) {
+            max_speed = RUN_SPEED;
+        }
+        if (m_gait == Gait::WALK) {
+            max_speed = WALK_SPEED;
+        }
     }
 
     if (space_on) {
@@ -391,6 +421,9 @@ void Player::update_move(float delta_time) {
 
 void Player::update_x_move() {
     m_player_pos.x += move_distance.x;
+    if (m_game_mode == SPECTATOR) {
+        return;
+    }
     AABB player_box = get_aabb();
     int minx = std::floor(player_box.min.x);
     int maxx = std::floor(player_box.max.x);
@@ -420,6 +453,9 @@ void Player::update_x_move() {
 
 void Player::update_y_move() {
     m_player_pos.y += move_distance.y;
+    if (m_game_mode == SPECTATOR) {
+        return;
+    }
     AABB player_box = get_aabb();
     int minx = std::floor(player_box.min.x);
     int maxx = std::floor(player_box.max.x);
@@ -453,6 +489,9 @@ void Player::update_y_move() {
 
 void Player::update_z_move() {
     m_player_pos.z += move_distance.z;
+    if (m_game_mode == SPECTATOR) {
+        return;
+    }
     AABB player_box = get_aabb();
     int minx = std::floor(player_box.min.x);
     int maxx = std::floor(player_box.max.x);
@@ -479,3 +518,15 @@ void Player::update_z_move() {
         }
     }
 }
+
+void Player::update_scroll(double yoffset) {
+    if (m_game_mode == SPECTATOR) {
+        if (yoffset > 0) {
+            max_speed += 1.0f;
+        } else {
+            if (max_speed > WALK_SPEED) {
+                max_speed -= 1.0f;
+            }
+        }
+    }   
+}