Update game scene system

Also, add funciton to check if emitter handle is still alive

engine/EC.h

@@ -26,6 +26,7 @@ typedef enum ComponentEnum {
     CLIFETIMER_T,
     CWATERRUNNER_T,
     CAIRTIMER_T,
+    CEMITTER_T,
 } ComponentEnum_t;
 
 typedef enum MovementMode {
@@ -215,6 +216,13 @@ typedef struct _CMoveable_t {
     bool gridmove;
 } CMoveable_t;
 
+typedef uint16_t EmitterHandle;
+typedef struct _CEmitter_t
+{
+    EmitterHandle handle;
+    Vector2 offset;
+} CEmitter_t;
+
 static inline void set_bbox(CBBox_t* p_bbox, unsigned int x, unsigned int y)
 {
     p_bbox->size.x = x;

engine/engine_conf.h

@@ -17,6 +17,6 @@
 #define MAX_TILE_TYPES 16
 
 #define N_TAGS 10
-#define N_COMPONENTS 14
+#define N_COMPONENTS 15
 #define MAX_COMP_POOL_SIZE 1024
 #endif // _ENGINE_CONF_H

engine/mempool.c

@@ -77,6 +77,7 @@ static CMoveable_t cmoveable_buffer[MAX_COMP_POOL_SIZE];
 static CLifeTimer_t clifetimer_buffer[MAX_COMP_POOL_SIZE];
 static CWaterRunner_t cwaterrunner_buffer[32];
 static CAirTimer_t cairtimer_buffer[8]; // Only player is expected to have this
+static CEmitter_t cemitter_buffer[MAX_COMP_POOL_SIZE]; // Only player is expected to have this
 
 // Static allocate mempools
 static MemPool_t comp_mempools[N_COMPONENTS] = {
@@ -94,6 +95,7 @@ static MemPool_t comp_mempools[N_COMPONENTS] = {
     {clifetimer_buffer, MAX_COMP_POOL_SIZE, sizeof(CLifeTimer_t), NULL, {0}},
     {cwaterrunner_buffer, 32, sizeof(CWaterRunner_t), NULL, {0}},
     {cairtimer_buffer, 8, sizeof(CAirTimer_t), NULL, {0}},
+    {cemitter_buffer, MAX_COMP_POOL_SIZE, sizeof(CEmitter_t), NULL, {0}},
 };
 static MemPool_t ent_mempool = {
     .buffer = entity_buffer,

engine/particle_sys.c

@@ -103,7 +103,7 @@ void play_emitter_handle(ParticleSystem_t* system, uint16_t handle)
 
 // An emitter cannot be unloaded or paused mid-way when particles to still
 // emitting, so defer into update function to do so
-void pause_emitter_handle(ParticleSystem_t* system, uint16_t handle)
+void stop_emitter_handle(ParticleSystem_t* system, EmitterHandle handle)
 {
     if (handle == 0) return;
     //if (!system->emitter_list[handle].playing) return;
@@ -118,7 +118,7 @@ void update_emitter_handle_position(ParticleSystem_t* system, EmitterHandle hand
     system->emitters[handle].position = pos;
 }
 
-void unload_emitter_handle(ParticleSystem_t* system, uint16_t handle)
+void unload_emitter_handle(ParticleSystem_t* system, EmitterHandle handle)
 {
     if (handle == 0) return;
 
@@ -126,12 +126,20 @@ void unload_emitter_handle(ParticleSystem_t* system, uint16_t handle)
     system->emitters[handle].finished = true;
 }
 
-void play_particle_emitter(ParticleSystem_t* system, const ParticleEmitter_t* in_emitter)
+bool is_emitter_handle_alive(ParticleSystem_t* system, EmitterHandle handle)
 {
-    uint16_t idx = load_in_particle_emitter(system, in_emitter);
-    if (idx == 0) return;
+    if (handle == 0) return false;
+
+    return system->emitters[handle].active;
+}
+
+EmitterHandle play_particle_emitter(ParticleSystem_t* system, const ParticleEmitter_t* in_emitter)
+{
+    EmitterHandle idx = load_in_particle_emitter(system, in_emitter);
+    if (idx == 0) return 0 ;
 
     play_emitter_handle(system, idx);
+    return idx;
 }
 
 void update_particle_system(ParticleSystem_t* system)
@@ -143,6 +151,12 @@ void update_particle_system(ParticleSystem_t* system)
     {
         ParticleEmitter_t* emitter = system->emitters + emitter_idx;
         uint32_t inactive_count = 0;
+
+        if (emitter->emitter_update_func != NULL && emitter->active)
+        {
+            emitter->active = emitter->emitter_update_func(emitter);
+        }
+
         for (uint32_t i = 0; i < emitter->n_particles; ++i)
         {
             // TODO: If a particle is not spawned, run its timer. Spawn on zero
@@ -187,10 +201,11 @@ void update_particle_system(ParticleSystem_t* system)
                 }
             }
         }
+
         if (inactive_count == emitter->n_particles)
         {
             // Stop playing only if all particles is inactive
-            if (!emitter->finished && emitter->config->one_shot)
+            if (!emitter->finished)
             {
                 emitter->finished = true;
             }
@@ -213,6 +228,7 @@ void update_particle_system(ParticleSystem_t* system)
         emitter_idx = system->emitter_list[emitter_idx].next;
     }
 }
+
 void draw_particle_system(ParticleSystem_t* system)
 {
     uint32_t emitter_idx = system->emitter_list[0].next;

engine/particle_sys.h

@@ -7,8 +7,6 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-typedef uint16_t EmitterHandle;
-
 typedef enum PartEmitterType
 {
     EMITTER_UNKNOWN = 0,
@@ -29,7 +27,10 @@ typedef struct Particle
     bool spawned;
 }Particle_t;
 
+typedef struct ParticleEmitter ParticleEmitter_t;
+
 typedef void (*particle_update_func_t)(Particle_t* part, void* user_data);
+typedef bool (*emitter_check_func_t)(const ParticleEmitter_t* emitter);
 
 typedef struct EmitterConfig
 {
@@ -41,7 +42,7 @@ typedef struct EmitterConfig
     bool one_shot;
 }EmitterConfig_t;
 
-typedef struct ParticleEmitter
+struct ParticleEmitter
 {
     const EmitterConfig_t* config;
     Sprite_t* spr;
@@ -53,7 +54,8 @@ typedef struct ParticleEmitter
     bool active;
     void* user_data;
     particle_update_func_t update_func;
-}ParticleEmitter_t;
+    emitter_check_func_t emitter_update_func;
+};
 
 typedef struct IndexList
 {
@@ -75,13 +77,14 @@ void init_particle_system(ParticleSystem_t* system);
 uint16_t get_number_of_free_emitter(ParticleSystem_t* system);
 
 // For one-shots
-void play_particle_emitter(ParticleSystem_t* system, const ParticleEmitter_t* in_emitter);
+EmitterHandle play_particle_emitter(ParticleSystem_t* system, const ParticleEmitter_t* in_emitter);
 
 EmitterHandle load_in_particle_emitter(ParticleSystem_t* system, const ParticleEmitter_t* in_emitter);
 void play_emitter_handle(ParticleSystem_t* system, EmitterHandle handle);
-void pause_emitter_handle(ParticleSystem_t* system, EmitterHandle handle);
+void stop_emitter_handle(ParticleSystem_t* system, EmitterHandle handle);
 void update_emitter_handle_position(ParticleSystem_t* system, EmitterHandle handle, Vector2 pos);
 void unload_emitter_handle(ParticleSystem_t* system, EmitterHandle handle);
+bool is_emitter_handle_alive(ParticleSystem_t* system, EmitterHandle handle);
 
 void update_particle_system(ParticleSystem_t* system);
 void draw_particle_system(ParticleSystem_t* system);

particle_test.c

@@ -45,6 +45,12 @@ void simple_particle_system_update(Particle_t* part, void* user_data)
         }
     }
 }
+
+static bool check_mouse_click(const ParticleEmitter_t* emitter)
+{
+    return IsMouseButtonDown(MOUSE_RIGHT_BUTTON);
+}
+
 int main(void)
 {
     InitWindow(1280, 640, "raylib");
@@ -76,12 +82,14 @@ int main(void)
         .config = &conf,
         .n_particles = MAX_PARTICLES,
         .update_func = &simple_particle_system_update,
+        .emitter_update_func = NULL,
         .spr = (tex.width == 0) ? NULL : &spr,
     };
 
     EmitterConfig_t conf2 ={
         .one_shot = false,
         .launch_range = {45, 135},
+        //.launch_range = {0, 360},
         .speed_range = {300, 800},
         .particle_lifetime = {15, 30},
         .initial_spawn_delay = 5,
@@ -92,15 +100,14 @@ int main(void)
         .config = &conf2,
         .n_particles = MAX_PARTICLES,
         .update_func = &simple_particle_system_update,
+        .emitter_update_func = &check_mouse_click,
         .spr = (tex.width == 0) ? NULL : &spr,
     };
 
-    EmitterHandle han = load_in_particle_emitter(&part_sys, &emitter2);
-    assert(han != 0);
-
     bool key_press = false;
     uint8_t key2_press = 0;
     char text_buffer[32];
+    EmitterHandle han = 0;
     while(!WindowShouldClose())
     {
         Vector2 mouse_pos = GetMousePosition();
@@ -121,8 +128,8 @@ int main(void)
 
         if (key2_press == 0b01)
         {
-            update_emitter_handle_position(&part_sys, han, mouse_pos);
-            play_emitter_handle(&part_sys, han);
+            emitter2.position = mouse_pos;
+            han = play_particle_emitter(&part_sys, &emitter2);
         }
         else if(key2_press == 0b11)
         {
@@ -130,7 +137,8 @@ int main(void)
         }
         else if (key2_press == 0b10)
         {
-            pause_emitter_handle(&part_sys, han);
+            stop_emitter_handle(&part_sys, han);
+            han = 0;
         }
 
         update_particle_system(&part_sys);

scenes/assets_loader.c

@@ -41,20 +41,28 @@ static bool parse_emitter_info(char* emitter_info_str, EmitterConfig_t* conf)
     char emitter_type;
     uint8_t one_shot;
     int data_count = sscanf(
-        emitter_info_str, "%c,%f-%f,%f-%f,%u-%u,%c",
+        emitter_info_str, "%c,%f-%f,%f-%f,%u-%u,%u,%c",
         &emitter_type,
         conf->launch_range, conf->launch_range + 1,
         conf->speed_range, conf->speed_range + 1,
         conf->particle_lifetime, conf->particle_lifetime + 1,
-        &one_shot
+        &conf->initial_spawn_delay, &one_shot
     );
 
-    if (data_count == 8)
+    if (data_count == 9)
     {
-        conf->type = (emitter_type == 'b') ? EMITTER_BURST : EMITTER_UNKNOWN;
+        conf->type = EMITTER_UNKNOWN;
+        if (emitter_type == 'b')
+        {
+            conf->type = EMITTER_BURST;
+        }
+        else if (emitter_type == 's')
+        {
+            conf->type = EMITTER_STREAM;
+        }
         conf->one_shot = (one_shot == '1');
     }
-    return data_count == 8;
+    return data_count == 9;
 }
 
 static inline AssetInfoType_t get_asset_type(const char* str)

scenes/editor_scene.c

@@ -171,6 +171,10 @@ static void level_scene_render_func(Scene_t* scene)
         sprintf(buffer, "FPS: %u", GetFPS());
         DrawText(buffer, gui_x, gui_y, 12, BLACK);
 
+        gui_y += 30;
+        sprintf(buffer, "part sys free: %u", get_number_of_free_emitter(&scene->part_sys));
+        DrawText(buffer, gui_x, gui_y, 12, BLACK);
+
         gui_y += 30;
         print_mempool_stats(buffer);
         DrawText(buffer, gui_x, gui_y, 12, BLACK);
@@ -1022,6 +1026,7 @@ void init_sandbox_scene(LevelScene_t* scene)
     sc_array_add(&scene->scene.systems, &spike_collision_system);
     sc_array_add(&scene->scene.systems, &edge_velocity_check_system);
     sc_array_add(&scene->scene.systems, &state_transition_update_system);
+    sc_array_add(&scene->scene.systems, &update_entity_emitter_system);
     sc_array_add(&scene->scene.systems, &player_ground_air_transition_system);
     sc_array_add(&scene->scene.systems, &lifetimer_update_system);
     sc_array_add(&scene->scene.systems, &airtimer_update_system);

scenes/game_scene.c

@@ -378,6 +378,7 @@ void init_game_scene(LevelScene_t* scene)
     sc_array_add(&scene->scene.systems, &spike_collision_system);
     sc_array_add(&scene->scene.systems, &edge_velocity_check_system);
     sc_array_add(&scene->scene.systems, &state_transition_update_system);
+    sc_array_add(&scene->scene.systems, &update_entity_emitter_system);
     sc_array_add(&scene->scene.systems, &player_ground_air_transition_system);
     sc_array_add(&scene->scene.systems, &lifetimer_update_system);
     sc_array_add(&scene->scene.systems, &airtimer_update_system);

scenes/game_systems.c

@@ -7,6 +7,8 @@
 #include <stdio.h>
 
 void simple_particle_system_update(Particle_t* part, void* user_data);
+void floating_particle_system_update(Particle_t* part, void* user_data);
+bool check_in_water(const ParticleEmitter_t* emitter);
 
 static const Vector2 GRAVITY = {0, GRAV_ACCEL};
 static const Vector2 UPTHRUST = {0, -GRAV_ACCEL * 1.1};
@@ -1469,8 +1471,47 @@ void state_transition_update_system(Scene_t* scene)
                 .n_particles = 5,
                 .user_data = &(CONTAINER_OF(scene, LevelScene_t, scene)->data),
                 .update_func = &simple_particle_system_update,
+                .emitter_update_func = NULL,
             };
             play_particle_emitter(&scene->part_sys, &emitter);
+
+        }
+
+        if (p_mstate->water_state & 1)
+        {
+            CEmitter_t* p_emitter = get_component(p_ent, CEMITTER_T);
+            if (p_emitter != NULL)
+            {
+                if (!is_emitter_handle_alive(&scene->part_sys, p_emitter->handle))
+                {
+                    ParticleEmitter_t emitter = {
+                        .spr = get_sprite(&scene->engine->assets, "p_water"),
+                        .config = get_emitter_conf(&scene->engine->assets, "pe_bubbling"),
+                        .position = p_ctransform->position,
+                        .n_particles = 5,
+                        .user_data = &(CONTAINER_OF(scene, LevelScene_t, scene)->data),
+                        .update_func = &floating_particle_system_update,
+                        .emitter_update_func = &check_in_water,
+                    };
+                    p_emitter->handle = play_particle_emitter(&scene->part_sys, &emitter);
+                }
+            }
+        }
+    }
+}
+
+void update_entity_emitter_system(Scene_t* scene)
+{
+    CEmitter_t* p_emitter;
+    unsigned long ent_idx;
+    sc_map_foreach(&scene->ent_manager.component_map[CEMITTER_T], ent_idx, p_emitter)
+    {
+        Entity_t* p_ent =  get_entity(&scene->ent_manager, ent_idx);
+        CTransform_t* p_ctransform = get_component(p_ent, CTRANSFORM_COMP_T);
+        CBBox_t* p_bbox = get_component(p_ent, CBBOX_COMP_T);
+        if (is_emitter_handle_alive(&scene->part_sys, p_emitter->handle))
+        {
+            update_emitter_handle_position(&scene->part_sys, p_emitter->handle, p_ctransform->position);
         }
     }
 }
@@ -2067,6 +2108,30 @@ void level_end_detection_system(Scene_t* scene)
     }
 }
 
+static inline bool is_point_in_water(Vector2 pos, TileGrid_t tilemap)
+{
+    unsigned int tile_idx = get_tile_idx(
+            pos.x,
+            pos.y,
+            tilemap.width
+    );
+    int tile_x = tile_idx % tilemap.width;
+    int tile_y = tile_idx / tilemap.width;
+    uint32_t water_height = tilemap.tiles[tile_idx].water_level * WATER_BBOX_STEP;
+    Vector2 tl = {tile_x * tilemap.tile_size, (tile_y + 1) * tilemap.tile_size - water_height};
+    return point_in_AABB(
+        pos,
+        (Rectangle){tl.x, tl.y, tilemap.tile_size, water_height}
+    );
+}
+
+bool check_in_water(const ParticleEmitter_t* emitter)
+{
+    LevelSceneData_t* lvl_data = (LevelSceneData_t*)emitter->user_data;
+    TileGrid_t tilemap = lvl_data->tilemap;
+    return is_point_in_water(emitter->position, tilemap);
+}
+
 void simple_particle_system_update(Particle_t* part, void* user_data)
 {
     LevelSceneData_t* lvl_data = (LevelSceneData_t*)user_data;
@@ -2093,18 +2158,53 @@ void simple_particle_system_update(Particle_t* part, void* user_data)
         Vector2Scale(part->velocity, delta_time)
     );
 
+    Vector2 center = Vector2AddValue(
+        part->position,
+        part->size / 2
+    );
     // Level boundary collision
     unsigned int level_width = tilemap.width * TILE_SIZE;
     unsigned int level_height = tilemap.height * TILE_SIZE;
-    {
 
-        if(
-            part->position.x < 0 || part->position.x + part->size > level_width
-            || part->position.y < 0 || part->position.y + part->size > level_height
-        )
-        {
-            part->timer = 0;
-        }
+    if(
+        center.x < 0 || center.x + part->size > level_width
+        || center.y < 0 || center.y + part->size > level_height
+    )
+    {
+        part->timer = 0;
     }
 }
 
+void floating_particle_system_update(Particle_t* part, void* user_data)
+{
+    LevelSceneData_t* lvl_data = (LevelSceneData_t*)user_data;
+    TileGrid_t tilemap = lvl_data->tilemap;
+
+    float delta_time = DELTA_T; // TODO: Will need to think about delta time handling
+    part->position = Vector2Add(
+        part->position,
+        Vector2Scale(part->velocity, delta_time)
+    );
+
+    Vector2 center = Vector2AddValue(
+        part->position,
+        part->size / 2
+    );
+    // Level boundary collision
+    unsigned int level_width = tilemap.width * TILE_SIZE;
+    unsigned int level_height = tilemap.height * TILE_SIZE;
+
+    if(
+        center.x < 0 || center.x + part->size > level_width
+        || center.y < 0 || center.y + part->size > level_height
+    )
+    {
+        part->timer = 0;
+    }
+
+    center.y = part->position.y;
+    if (!is_point_in_water(center, tilemap))
+    {
+        part->timer = 0;
+    }
+}

scenes/game_systems.h

@@ -13,6 +13,7 @@ void global_external_forces_system(Scene_t* scene);
 void movement_update_system(Scene_t* scene);
 void player_ground_air_transition_system(Scene_t* scene);
 void state_transition_update_system(Scene_t* scene);
+void update_entity_emitter_system(Scene_t* scene);
 void update_tilemap_system(Scene_t* scene);
 void hitbox_update_system(Scene_t* scene);
 void edge_velocity_check_system(Scene_t* scene);

scenes/items_ent.c

@@ -183,6 +183,15 @@ Entity_t* create_bomb(EntityManager_t* ent_manager, Vector2 launch_dir)
     p_ctransform->position.y += (TILE_SIZE - 25) / 2;
 
     p_ctransform->velocity = Vector2Scale(Vector2Normalize(launch_dir), 500);
+
+    if (launch_dir.x > 0)
+    {
+        p_ctransform->position.x += TILE_SIZE/ 2;
+    }
+    else if (launch_dir.x < 0)
+    {
+        p_ctransform->position.x -= TILE_SIZE / 2;
+    }
     return p_bomb;
 }
 

scenes/player_ent.c

@@ -105,6 +105,8 @@ Entity_t* create_player(EntityManager_t* ent_manager)
     p_cspr->sprites = player_sprite_map;
     p_cspr->transition_func = &player_sprite_transition_func;
 
+    add_component(p_ent, CEMITTER_T);
+
     return p_ent;
 }