Initialize knight_anims statically so it survives hot reloads

Makefile

@@ -1,17 +1,18 @@
-CFLAGS=-g --std=c++23 -fsanitize=address -fno-omit-frame-pointer -Wall -Wextra -pedantic -O0
+CFLAGS=--std=c++23 -Wall -Wextra -pedantic -O0 -DDEBUG
+DEBUGFLAGS=-g3 -gdwarf-4 -fsanitize=address -fno-omit-frame-pointer -DDEBUG
 LDFLAGS=-L./lib -lraylib -lm -ldl
 INCLUDES=-I./include
 CC=g++
 
 .PHONY: build clean run all
 
-all: main game.so
+all: game.so main
 
 main: main.cpp game.h Makefile
-	$(CC) $(CFLAGS) $(INCLUDES) main.cpp $(LDFLAGS) -o main
+	$(CC) $(CFLAGS) $(INCLUDES) $(DEBUGFLAGS) main.cpp $(LDFLAGS) -o main
 
 game.so: game.cpp game.h lib.h sprites.h game_data.h Makefile 
-	$(CC) $(CFLAGS) $(INCLUDES) -shared -fPIC game.cpp -L./lib -lraylib -lm -o game.so.tmp
+	$(CC) $(CFLAGS) $(INCLUDES) $(DEBUGFLAGS) -shared -fPIC game.cpp -L./lib -lraylib -lm -o game.so.tmp
 	mv game.so.tmp game.so
 
 run: all

game.cpp

@@ -13,15 +13,6 @@ using namespace std;
 #include "game_data.h"
 
 GameState *InitState() {
-    knight_anims[ANIM_KNIGHT_IDLE]         = knight_idle;
-    knight_anims[ANIM_KNIGHT_RUN]          = knight_run;
-    knight_anims[ANIM_KNIGHT_ATTACK_SIDE1] = knight_attack_side1;
-    knight_anims[ANIM_KNIGHT_ATTACK_SIDE2] = knight_attack_side2;
-    knight_anims[ANIM_KNIGHT_ATTACK_TOP1]  = knight_attack_front1;
-    knight_anims[ANIM_KNIGHT_ATTACK_TOP2]  = knight_attack_front2;
-    knight_anims[ANIM_KNIGHT_ATTACK_BACK1] = knight_attack_back1;
-    knight_anims[ANIM_KNIGHT_ATTACK_BACK2] = knight_attack_back2;
-
     Assets assets = {};
     assets.textures = (Texture*)malloc(sizeof(Texture2D) * TEXTURES_BUF_SIZE);
     assets.textures[TEX_GROUND] = LoadTexture("./assets/Terrain/Ground/Tilemap_Flat.png");
@@ -31,6 +22,7 @@ GameState *InitState() {
     assets.textures[TEX_TARGET_RETICLE] = LoadTexture("./assets/UI/Pointers/02.png");
 
     auto game = new GameState;
+    game->should_reset = false;
     game->assets = assets;
     // TODO: Probably want to use idiomatic C++ here?
     game->knights = (Knight*)calloc(MAX_KNIGHTS, sizeof(Knight));
@@ -42,7 +34,7 @@ GameState *InitState() {
         game->knights[i].position = {rand_x,rand_y};
 
         PlayAnimation(ANIM_KNIGHT_IDLE, knight_anims, &game->anim_playbacks[i]);
-        int rand_frame = GetRandomValue(0, knight_anims[ANIM_KNIGHT_IDLE].total_frames);
+        int rand_frame = GetRandomValue(0, knight_anims[ANIM_KNIGHT_IDLE].total_frames - 1);
         game->anim_playbacks[i].current_frame = rand_frame;
     }
     game->entity_count = entities;
@@ -53,7 +45,7 @@ GameState *InitState() {
 }
 
 GameState *Init() {
-    SetTraceLogLevel(4);
+    SetTraceLogLevel(LOG_WARNING);
     InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "Tiny Knights");
 
     int monitor = GetCurrentMonitor();
@@ -72,51 +64,17 @@ GameState *Init() {
 
 void Input(GameState *state) {
     if (IsMouseButtonPressed(0)) {
-        state->selection_mouse_start_pos = optional<Point>{GetScreenToWorld2D(GetMousePosition(), state->camera)};
+        if (IsKeyDown(KEY_LEFT_CONTROL)) {
+            state->drag_camera_start_pos = optional<Point>{GetMousePosition()};
+            state->camera_target_start_pos = state->camera.target;
+        } else {
+            auto point = GetScreenToWorld2D(GetMousePosition(), state->camera);
+            state->selection_mouse_start_pos = optional<Point>{point};
+        }
     }
     if (IsMouseButtonReleased(0)) {
-        // TODO: This is what should happen when the distance is too small
-        // Point start_pos = game->selection_mouse_start_pos.some.point;
-        Point start_pos = state->selection_mouse_start_pos.value();
-        Point current_pos = GetScreenToWorld2D(GetMousePosition(), state->camera);
-
-        if (Vector2DistanceSqr(current_pos, start_pos) >= 100.0f) {
-            f32 width = current_pos.x - start_pos.x;
-            f32 height = current_pos.y - start_pos.y;
-            f32 x = width >= 0.0f ? start_pos.x : current_pos.x;
-            f32 y = height >= 0.0f ? start_pos.y : current_pos.y;
-            Rectangle rect = {x, y, fabs(width), fabs(height)};
-            for (int i = 0; i < state->entity_count; i++) {
-                Rectangle mouse_select_area = {
-                    state->knights[i].position.x + knight_colrect_select.x,
-                    state->knights[i].position.y + knight_colrect_select.y,
-                    knight_colrect_select.width,
-                    knight_colrect_select.height,
-                };
-                state->knights[i].selected =
-                    CheckCollisionRecs(rect, mouse_select_area);
-            }
-        } else {
-            // TODO: This kind of sucks that we're doing all the math here to calculate
-            // the position of the collider, we need a helper that calculates origin offset
-            int k_idx = -1;
-            for (int i = 0; i < state->entity_count; i++) {
-                Rectangle mouse_select_area = {
-                    state->knights[i].position.x + knight_colrect_select.x,
-                    state->knights[i].position.y + knight_colrect_select.y,
-                    knight_colrect_select.width,
-                    knight_colrect_select.height,
-                };
-                if (CheckCollisionPointRec(current_pos, mouse_select_area)) {
-                    k_idx = i;
-                }
-                state->knights[i].selected = false;
-            }
-            if (k_idx != -1) {
-                state->knights[k_idx].selected = true;
-            }
-        }
         state->selection_mouse_start_pos = optional<Point>{};
+        state->drag_camera_start_pos = optional<Point>{};
     }
 
     if (IsMouseButtonPressed(1)) {
@@ -134,32 +92,22 @@ void Input(GameState *state) {
         }
     }
 
-    f32 cam_speed = 5.0;
-    if (IsKeyDown(KEY_RIGHT)) {
-        state->camera.target.x += cam_speed;
+    if (IsKeyPressed(KEY_SPACE)) {
+        for (int i = 0; i < state->entity_count; i++) {
+            auto& knight = state->knights[i];
+            if (knight.selected && knight.state != KnightState::ATTACKING) {
+                knight.ordered_to_move = false;
+                knight.state = KnightState::ATTACKING;
+                PlayAnimation(ANIM_KNIGHT_ATTACK_SIDE1, knight_anims, &state->anim_playbacks[i]);
             }
-    if (IsKeyDown(KEY_LEFT)) {
-        state->camera.target.x -= cam_speed;
         }
-    if (IsKeyDown(KEY_UP)) {
-        state->camera.target.y -= cam_speed;
     }
-    if (IsKeyDown(KEY_DOWN)) {
-        state->camera.target.y += cam_speed;
-    }
-    // if (IsKeyPressed(KEY_SPACE) && state->selected_knight != -1) {
-    //     int k_idx = game->selected_knight;
-    //     if (game->knights[k_idx].state != KNIGHT_ATTACKING) {
-    //         game->knights[k_idx].state = KNIGHT_ATTACKING;
-    //         PlayAnimation(ANIM_KNIGHT_ATTACK_SIDE1, knight_anims, &game->anim_playbacks[k_idx]);
-    //     }
-    // }
     if (IsKeyPressed(KEY_F1)) {
         global_debug_mode = !global_debug_mode;
     }
     if (IsKeyPressed(KEY_F2)) {
-        auto new_state = InitState();
-        *state = *new_state;
+        state->should_reset = true;
+        printf("Resetting GameState\n");
     }
 }
 
@@ -169,7 +117,6 @@ void Update(GameState *state) {
         Point start_pos = state->selection_mouse_start_pos.value();
         Point current_pos = GetScreenToWorld2D(GetMousePosition(), state->camera);
 
-        if (Vector2DistanceSqr(current_pos, start_pos) >= 100.0f) {
         f32 width = current_pos.x - start_pos.x;
         f32 height = current_pos.y - start_pos.y;
         f32 x = width >= 0.0f ? start_pos.x : current_pos.x;
@@ -182,10 +129,12 @@ void Update(GameState *state) {
                 knight_colrect_select.width,
                 knight_colrect_select.height,
             };
-                state->knights[i].selected =
-                    CheckCollisionRecs(rect, mouse_select_area);
+            state->knights[i].selected = CheckCollisionRecs(rect, mouse_select_area);
         }
     }
+    if (state->drag_camera_start_pos.has_value()) {
+        Point start_pos = state->drag_camera_start_pos.value();
+        state->camera.target = state->camera_target_start_pos + (start_pos - GetMousePosition());
     }
     float dt = 0.33;
     const float cam_move_speed = 1050.0f * dt;
@@ -234,6 +183,7 @@ void Update(GameState *state) {
             }
         }
         if (i == 0) continue;
+        // TODO: This is likely getting called every frame, probably best to have a dirty flag to detect movement
         // Sort the entities by y position using Insertion Sort
         int j = i;
         while (j > 0 && state->knights[j].position.y < state->knights[j - 1].position.y) {
@@ -270,7 +220,7 @@ void Draw2D(GameState *state) {
             }
             Vector2 pos = {(f32)(32 * col + topx), (f32)(32 * row + topy)};
             Rectangle src_rect = {(f32)(32 * atlas_col), (f32)(32 * atlas_row), 32, 32};
-            D_DrawTextureRec(state->assets.textures[TEX_GROUND], src_rect, pos, WHITE);
+            DrawTextureRec(state->assets.textures[TEX_GROUND], src_rect, pos, WHITE);
         }
     }
 
@@ -305,7 +255,6 @@ void Draw2D(GameState *state) {
                 knight_colrect_select.width,
                 knight_colrect_select.height,
             };
-            // Color color = game->selected_knight == NULL ? RED : GREEN;
             DrawRectangleLinesEx(knight_col_area, 2.0f, GREEN);
         }
     }
@@ -334,7 +283,12 @@ extern "C" {
         return Init();
     }
 
+    GameState* game_init_state() {
+        return InitState();
+    }
+
     void game_step(GameState *state) {
+        try {
             Input(state);
             Update(state);
             BeginDrawing();
@@ -351,8 +305,14 @@ extern "C" {
             }
             EndDrawing();
         }
+        catch (const exception& e) {
+            printf("Exception: %s\n", e.what());
+            TraceLog(LOG_ERROR, "Exception: %s", e.what());
+        }
+    }
 
     void game_cleanup(GameState *state) {
+        // free(state->assets.textures);
         delete state;
         printf("Cleaning Up\n");
         CloseWindow();

game.h

@@ -2,6 +2,7 @@
 #include "raylib.h"
 #include "lib.h"
 #include "sprites.h"
+#include <vector>
 
 #include <optional>
 
@@ -13,11 +14,9 @@ using namespace std;
 #define SCREEN_WIDTH 1300
 #define SCREEN_HEIGHT 1080
 
-#define DEBUG_MODE_ENABLED
-
 bool global_debug_mode = false;
 
-enum class KnightState : u8 {
+enum class KnightState {
     IDLE = 0,
     RUNNING = 1,
     ATTACKING = 2,
@@ -48,6 +47,7 @@ struct Assets {
 };
 
 struct GameState {
+    bool should_reset;
     Camera2D camera;
     int frame_count;
     Point camera_position;
@@ -55,13 +55,16 @@ struct GameState {
     optional<Point> selected_point;
     Knight *knights;
     SpriteAnimationPlayback *anim_playbacks;
-    Knight *selected_knights;
 
     optional<Point> selection_mouse_start_pos;
 
     int entity_count;
     Assets assets;
 
+    optional<Point> drag_camera_start_pos;
+
+    Point camera_target_start_pos;
+
     ~GameState() {
         free(knights);
         free(anim_playbacks);
@@ -69,6 +72,6 @@ struct GameState {
             UnloadTexture(assets.textures[i]);
         }
         free(assets.textures);
-        printf("I freed the stuff?\n");
+        printf("Freeing GameState memory\n");
     }
 };

game_data.h

@@ -14,13 +14,6 @@
 #define ANIM_KNIGHT_ATTACK_BACK1 6
 #define ANIM_KNIGHT_ATTACK_BACK2 7
 
-// SpriteSheet knight_spritesheet = {
-//     .name = "blue_knight",
-//     .texture = {0},
-//     // .anim_count = 8,
-//     .size = { 1152, 1536 },
-// };
-
 const u16 knight_sprite_size = 192;
 const Vector2 knight_origin = {knight_sprite_size / 2, knight_sprite_size / 2 + 35};
 const Size knight_col_size = {50, 75};
@@ -32,52 +25,13 @@ const Rectangle knight_colrect_select = {
     knight_col_size.height,
 };
 
-SpriteAnimation knight_idle = {
-    .loop = true,
-    .total_frames = 6,
+SpriteAnimation knight_anims[8] = {
+    {.loop = true,  .total_frames = 6}, // ANIM_KNIGHT_IDLE
+    {.loop = true,  .total_frames = 6}, // ANIM_KNIGHT_RUN
+    {.loop = false, .total_frames = 6}, // ANIM_KNIGHT_ATTACK_SIDE1
+    {.loop = false, .total_frames = 6}, // ANIM_KNIGHT_ATTACK_SIDE2
+    {.loop = false, .total_frames = 6}, // ANIM_KNIGHT_ATTACK_TOP1
+    {.loop = false, .total_frames = 6}, // ANIM_KNIGHT_ATTACK_TOP2
+    {.loop = false, .total_frames = 6}, // ANIM_KNIGHT_ATTACK_BACK1
+    {.loop = false, .total_frames = 6}, // ANIM_KNIGHT_ATTACK_BACK2
 };
-
-SpriteAnimation knight_run = {
-    .loop = true,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_attack_side1 = {
-    .loop = false,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_attack_side2 = {
-    .loop = false,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_attack_front1 = {
-    .loop = false,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_attack_front2 = {
-    .loop = false,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_attack_back1 = {
-    .loop = false,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_attack_back2 = {
-    .loop = false,
-    .total_frames = 6,
-};
-
-SpriteAnimation knight_anims[8];
-// knight_anims[ANIM_KNIGHT_IDLE] = knight_idle;
-// knight_anims[ANIM_KNIGHT_RUN] = knight_run;
-// knight_anims[ANIM_KNIGHT_ATTACK_SIDE1] = knight_attack_side1;
-// knight_anims[ANIM_KNIGHT_ATTACK_SIDE2] = knight_attack_side2;
-// knight_anims[ANIM_KNIGHT_ATTACK_TOP1] = knight_attack_front1;
-// knight_anims[ANIM_KNIGHT_ATTACK_TOP2] = knight_attack_front2;
-// knight_anims[ANIM_KNIGHT_ATTACK_BACK1] = knight_attack_back1;
-// knight_anims[ANIM_KNIGHT_ATTACK_BACK2] = knight_attack_back2;

lib.h

@@ -17,7 +17,6 @@ typedef float     f32;
 typedef double    f64;
 typedef uintptr_t uptr;
 typedef char      sbyte;
-typedef ptrdiff_t size;
 typedef size_t    usize;
 
 typedef Vector2 Point;
@@ -48,7 +47,7 @@ extern "C" {
 extern bool global_debug_mode;
 inline void D_DrawTextureV(Texture2D texture, Vector2 position, Color tint) {
     DrawTextureV(texture, position, tint);
-#ifdef DEBUG_MODE_ENABLED
+#ifdef DEBUG
     if (global_debug_mode) {
         Rectangle debug = {position.x,position.y,(f32)texture.width,(f32)texture.height};
         DrawRectangleLinesEx(debug, 1.0f, RED);
@@ -56,37 +55,10 @@ inline void D_DrawTextureV(Texture2D texture, Vector2 position, Color tint) {
 #endif
 }
 
-// Vector2 operations
-#define v2_add Vector2Add
-#define v2_sub Vector2Subtract
-#define v2_mul Vector2Scale
-#define v2_div Vector2Divide
-#define v2_dot Vector2DotProduct
-#define v2_len Vector2Length
-#define v2_norm Vector2Normalize
-#define v2_dist Vector2Distance
-#define v2_lerp Vector2Lerp
-
-// Vector3 operations
-#define v3_add Vector3Add
-#define v3_sub Vector3Subtract
-#define v3_mul Vector3Scale
-#define v3_div Vector3Divide
-#define v3_dot Vector3DotProduct
-#define v3_cross Vector3CrossProduct
-#define v3_len Vector3Length
-#define v3_norm Vector3Normalize
-#define v3_dist Vector3Distance
-#define v3_lerp Vector3Lerp
-
-// Constructor-style macros
-#define v2(x, y) ((Vector2){x, y})
-#define v3(x, y, z) ((Vector3){x, y, z})
-
 
 inline void D_DrawTextureRec(Texture2D texture, Rectangle source, Vector2 position, Color tint) {
     DrawTextureRec(texture, source, position, tint);
-#ifdef DEBUG_MODE_ENABLED
+#ifdef DEBUG
     if (global_debug_mode) {
         Rectangle debug = {position.x,position.y,source.width,source.height};
         DrawRectangleLinesEx(debug, 1.0f, RED);
@@ -96,7 +68,7 @@ inline void D_DrawTextureRec(Texture2D texture, Rectangle source, Vector2 positi
 
 inline void D_DrawTexturePro(Texture2D texture, Rectangle source, Rectangle dest, Vector2 origin, float rotation, Color tint) {
     DrawTexturePro(texture, source, dest, origin, rotation, tint);
-#ifdef DEBUG_MODE_ENABLED
+#ifdef DEBUG
     if (global_debug_mode) {
         Rectangle debug = {dest.x-origin.x,dest.y-origin.y,dest.width,dest.height};
         DrawRectangleLinesEx(debug, 1.0f, RED);

main.cpp

@@ -3,14 +3,13 @@
 #include <sys/stat.h>
 #include <cstdio>
 
-struct GameState;
+#include "game.h"
 
 struct GameApi {
-    struct GameState *(*init)();
+    GameState *(*init)();
+    GameState *(*init_state)();
     void (*step) (GameState *state);
-    void (*finalize) (GameState *state);
-    void (*reload) (GameState *state);
-    void (*unload) (GameState *state);
+    void (*cleanup) (GameState *state);
     bool (*window_should_close)();
 };
 
@@ -38,20 +37,21 @@ bool load_game_api(Game* game) {
         return false;
     }
     
-    if (game->gamelib_handle) {
-        dlclose(game->gamelib_handle);
-    }
-    
-    game->gamelib_handle = dlopen(lib_path, RTLD_NOW);
-
-    if (!game->gamelib_handle) {
+    void *gamelib_handle = dlopen(lib_path, RTLD_NOW);
+    if (!gamelib_handle) {
         printf("Failed to load game.so: %s\n", dlerror());
         return false;
     }
 
+    if (game->gamelib_handle) {
+        dlclose(game->gamelib_handle);
+    }
+    game->gamelib_handle = gamelib_handle;
+    
     game->api.init = (GameState*(*)())dlsym(game->gamelib_handle, "game_init");
+    game->api.init_state = (GameState*(*)())dlsym(game->gamelib_handle, "game_init_state");
     game->api.step = (void(*)(GameState*))dlsym(game->gamelib_handle, "game_step");
-    game->api.finalize = (void(*)(GameState*))dlsym(game->gamelib_handle, "game_cleanup");
+    game->api.cleanup = (void(*)(GameState*))dlsym(game->gamelib_handle, "game_cleanup");
     game->api.window_should_close = (bool(*)())dlsym(game->gamelib_handle, "window_should_close");
     
     game->last_write_time = write_time;
@@ -60,7 +60,7 @@ bool load_game_api(Game* game) {
 }
 
 int main(void) {
-    Game game;
+    Game game = {};
 
     load_game_api(&game);
 
@@ -70,9 +70,14 @@ int main(void) {
         // float dt = GetFrameTime();
         load_game_api(&game);
 
+        if (game.state->should_reset) {
+            delete game.state;
+            game.state = game.api.init_state();
+        }
+
         game.api.step(game.state);
     }
 
-    game.api.finalize(game.state);
+    game.api.cleanup(game.state);
     return 0;
 }

sprites.h

@@ -15,6 +15,7 @@ struct SpriteAnimationPlayback {
     u8 total_frames;
     u8 current_frame;
     u8 loop;
+    u8 finished;
 };
 
 void PlayAnimation(int animation, SpriteAnimation *anims, SpriteAnimationPlayback *playback);
@@ -27,6 +28,7 @@ inline void PlayAnimation(int animation, SpriteAnimation *anims, SpriteAnimation
     playback->row = animation;
     playback->total_frames = anims[animation].total_frames;
     playback->loop = anims[animation].loop;
+    playback->finished = false;
 }
 
 void TickSpriteAnimations(SpriteAnimationPlayback *playbacks, int len) {
@@ -41,11 +43,12 @@ void TickSpriteAnimations(SpriteAnimationPlayback *playbacks, int len) {
                 if (playback->loop) {
                     playback->current_frame = 0;
                 }
+                playback->finished = true;
             }
         }
     }
 }
 
 inline bool IsAnimationFinished(SpriteAnimationPlayback playback) {
-    return playback.current_frame == playback.total_frames;
+    return playback.finished;
 }