Implement simple animation system

Changelog:
- Add sprite map for player
- Add an animation system
- Add a placeholder player sprite transition function

.gitignore

@@ -1,3 +1,4 @@
 .cache/
 build/
 compile_commands.json
+res/

CMakeLists.txt

@@ -118,3 +118,21 @@ target_link_libraries(menu_test
     ${GAME_LIBS}
 )
 
+add_executable(assets_test
+    assets_test.c
+)
+target_include_directories(assets_test
+    PRIVATE
+    ${CMAKE_CURRENT_LIST_DIR}
+    ${RAYLIB_DIR}/include
+)
+target_compile_options(assets_test PRIVATE -fsanitize=address -gdwarf-4)
+target_link_options(assets_test PRIVATE -fsanitize=address -gdwarf-4)
+target_link_directories(assets_test
+    PRIVATE
+    ${RAYLIB_DIR}/lib
+)
+target_link_libraries(assets_test
+    ${GAME_LIBS}
+)
+

assets.h

@@ -1,29 +0,0 @@
-#ifndef __ASSETS_H
-#define __ASSETS_H
-#include "sc/map/sc_map.h"
-#include "raylib.h"
-
-typedef struct Animation
-{
-    Image* sprite;
-    int frame_count;
-    int current_frame;
-    int speed;
-    Vector2 size;
-    char* name;
-}Animation_t;
-
-typedef struct Assets
-{
-}Assets_t;
-#endif // __ASSETS_H
-
-void add_texture(Assets_t *assets, char *name, char *path);
-void add_animation(Assets_t *assets, char *name, char *path);
-void add_sound(Assets_t *assets, char *name, char *path);
-void add_font(Assets_t *assets, char *name, char *path);
-
-Image* get_texture(Assets_t *assets);
-Animation_t* get_animation(Assets_t *assets);
-Sound* get_sound(Assets_t *assets);
-Font* get_font(Assets_t *assets);

assets_test.c

@@ -0,0 +1,61 @@
+#include "assets.h"
+#include <stdio.h>
+#include <unistd.h>
+#include "raylib.h"
+
+int main(void)
+{
+    InitWindow(1280, 640, "raylib");
+    InitAudioDevice();
+    SetTargetFPS(60);
+
+    Assets_t assets;
+    init_assets(&assets);
+
+    Texture2D* tex = add_texture(&assets, "testtex", "res/test_tex.png");
+
+    add_sprite(&assets, "testspr1", tex);
+    Sprite_t* spr = get_sprite(&assets, "testspr1");
+    spr->origin = (Vector2){0, 0};
+    spr->frame_size = (Vector2){32, 32};
+
+    add_sprite(&assets, "testspr2", tex);
+    Sprite_t* spr2 = get_sprite(&assets, "testspr2");
+    spr2->frame_count = 4;
+    spr2->origin = (Vector2){0, 0};
+    spr2->frame_size = (Vector2){32, 32};
+    spr2->speed = 15;
+
+    add_sound(&assets, "testsnd", "res/sound.ogg");
+    Sound* snd = get_sound(&assets, "testsnd");
+    add_font(&assets, "testfont", "res/test_font.ttf");
+    Font* fnt = get_font(&assets, "testfont");
+
+    while(!WindowShouldClose())
+    {
+        if (IsKeyReleased(KEY_C))
+        {
+            PlaySound(*snd);
+        }
+
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+            DrawTextEx(*fnt, "Press C to play a sound", (Vector2){64, 64}, 24, 1, RED);
+
+            // Draw the static Sprite and animated Sprite
+            draw_sprite(spr, (Vector2){64,128});
+            draw_sprite(spr2, (Vector2){64,180});
+        EndDrawing();
+
+        // Update the animated Sprite
+        spr2->elapsed++;
+        if (spr2->elapsed == spr2->speed)
+        {
+            spr2->current_frame++;
+            spr2->current_frame %= spr2->frame_count;
+            spr2->elapsed = 0;
+        }
+    } 
+    CloseWindow();
+    term_assets(&assets);
+}

build.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+cd build/ && make -j4 && cd ..

engine/CMakeLists.txt

@@ -1,6 +1,8 @@
 add_subdirectory(EC)
 add_library(lib_scenes STATIC
     engine.c
+    assets.c
+    assets_maps.c
     editor_scene.c
     menu_scene.c
     game_systems.c

engine/EC/components.h

@@ -2,10 +2,11 @@
 #define __COMPONENTS_H
 #include "raylib.h"
 #include <stdint.h>
+#include "entity.h"
 // TODO: Look at sc to use macros to auto generate functions
 
-#define N_COMPONENTS 9
-enum ComponentEnum
+#define N_COMPONENTS 10
+typedef enum ComponentEnum
 {
     CBBOX_COMP_T,
     CTRANSFORM_COMP_T,
@@ -16,8 +17,8 @@ enum ComponentEnum
     CCONTAINER_T,
     CHITBOXES_T,
     CHURTBOX_T,
-};
-typedef enum ComponentEnum ComponentEnum_t;
+    CSPRITE_T,
+}ComponentEnum_t;
 
 typedef struct _CBBox_t
 {
@@ -112,6 +113,29 @@ typedef struct _CHurtbox_t
     bool fragile;
 }CHurtbox_t;
 
+// Credits to bedroomcoders.co.uk for this
+typedef struct Sprite
+{
+    Texture2D* texture;
+    Vector2 frame_size;
+    Vector2 origin;
+    int frame_count;
+    int current_frame;
+    int elapsed;
+    int speed;
+    char* name;
+}Sprite_t;
+
+typedef unsigned int (*sprite_transition_func_t)(Entity_t *ent); // Transition requires knowledge of the entity
+typedef struct _CSprite_t
+{
+    const char * const *sprites_map; //Array of all sprite names associated
+    Sprite_t* sprite;
+    sprite_transition_func_t transition_func;
+    Vector2 offset;
+    unsigned int current_idx;
+}CSprite_t;
+
 static inline void set_bbox(CBBox_t* p_bbox, unsigned int x, unsigned int y)
 {
     p_bbox->size.x = x;

engine/EC/mempool.c

@@ -14,13 +14,8 @@ static CPlayerState_t cplayerstate_buffer[1]; // Only player is expected to have
 static CContainer_t ccontainer_buffer[MAX_COMP_POOL_SIZE];
 static CHitBoxes_t chitboxes_buffer[MAX_COMP_POOL_SIZE];
 static CHurtbox_t churtbox_buffer[MAX_COMP_POOL_SIZE];
+static CSprite_t csprite_buffer[MAX_COMP_POOL_SIZE];
 
-// Use hashmap as a Set
-// Use list will be used to check if an object exist
-// The alternative method to check the free list if idx is not there
-// requires bound checking
-// It's just easier on the mind overall
-// If need to optimise memory, replace free_list with set and remove use_list
 typedef struct MemPool
 {
     void * const buffer;
@@ -42,6 +37,7 @@ static MemPool_t comp_mempools[N_COMPONENTS] =
     {ccontainer_buffer, MAX_COMP_POOL_SIZE, sizeof(CContainer_t), NULL, {0}},
     {chitboxes_buffer, MAX_COMP_POOL_SIZE, sizeof(CHitBoxes_t), NULL, {0}},
     {churtbox_buffer, MAX_COMP_POOL_SIZE, sizeof(CHurtbox_t), NULL, {0}},
+    {csprite_buffer, MAX_COMP_POOL_SIZE, sizeof(CSprite_t), NULL, {0}},
 };
 static MemPool_t ent_mempool = {entity_buffer, MAX_COMP_POOL_SIZE, sizeof(Entity_t), NULL, {0}};
 

engine/assets.c

@@ -0,0 +1,133 @@
+#include "assets.h"
+#include "assert.h"
+
+#define MAX_TEXTURES 16
+#define MAX_SPRITES 16
+#define MAX_SOUNDS 16
+#define MAX_FONTS 4
+uint8_t free_idx[4] = {0};
+
+// Hard limit number of 
+static Texture2D textures[MAX_TEXTURES];
+static Font fonts[MAX_FONTS];
+static Sound sfx[MAX_SOUNDS];
+static Sprite_t sprites[MAX_SPRITES];
+
+// Maybe need a circular buffer??
+Texture2D* add_texture(Assets_t *assets, char *name, char *path)
+{
+    uint8_t tex_idx = free_idx[0];
+    assert(tex_idx < MAX_TEXTURES);
+    textures[tex_idx] = LoadTexture(path);
+    sc_map_put_s64(&assets->m_textures, name, tex_idx);
+    free_idx[0]++;
+    return textures + tex_idx;
+}
+
+Sprite_t* add_sprite(Assets_t *assets, char *name, Texture2D* texture)
+{
+    uint8_t spr_idx = free_idx[1];
+    assert(spr_idx < MAX_SPRITES);
+    memset(sprites + spr_idx, 0, sizeof(Sprite_t));
+    sprites[spr_idx].texture = texture;
+    sc_map_put_s64(&assets->m_sprites, name, spr_idx);
+    free_idx[1]++;
+    return sprites + spr_idx;
+}
+
+Sound* add_sound(Assets_t *assets, char *name, char *path)
+{
+    uint8_t snd_idx = free_idx[2];
+    assert(snd_idx < MAX_SOUNDS);
+    sfx[snd_idx] = LoadSound(path);
+    sc_map_put_s64(&assets->m_sounds, name, snd_idx);
+    free_idx[2]++;
+    return sfx + snd_idx;
+}
+
+Font* add_font(Assets_t *assets, char *name, char *path)
+{
+    uint8_t fnt_idx = free_idx[3];
+    assert(fnt_idx < MAX_FONTS);
+    fonts[fnt_idx] = LoadFont(path);
+    sc_map_put_s64(&assets->m_fonts, name, fnt_idx);
+    free_idx[3]++;
+    return fonts + fnt_idx;
+}
+
+void init_assets(Assets_t *assets)
+{
+    sc_map_init_s64(&assets->m_fonts, MAX_FONTS, 0);
+    sc_map_init_s64(&assets->m_sprites, MAX_SPRITES, 0);
+    sc_map_init_s64(&assets->m_textures, MAX_TEXTURES, 0);
+    sc_map_init_s64(&assets->m_sounds, MAX_SOUNDS, 0);
+}
+
+void free_all_assets(Assets_t *assets)
+{
+    sc_map_clear_s64(&assets->m_textures);
+    sc_map_clear_s64(&assets->m_fonts);
+    sc_map_clear_s64(&assets->m_sounds);
+    sc_map_clear_s64(&assets->m_sprites);
+    memset(free_idx, 0, sizeof(free_idx));
+}
+
+void term_assets(Assets_t *assets)
+{
+    free_all_assets(assets);
+    sc_map_term_s64(&assets->m_textures);
+    sc_map_term_s64(&assets->m_fonts);
+    sc_map_term_s64(&assets->m_sounds);
+    sc_map_term_s64(&assets->m_sprites);
+}
+
+Texture2D* get_texture(Assets_t *assets, const char *name)
+{
+    uint8_t tex_idx = sc_map_get_s64(&assets->m_textures, name);
+    if (sc_map_found(&assets->m_textures))
+    {
+        return textures + tex_idx;
+    }
+    return NULL;
+}
+
+Sprite_t* get_sprite(Assets_t *assets, const char *name)
+{
+    uint8_t spr_idx = sc_map_get_s64(&assets->m_sprites, name);
+    if (sc_map_found(&assets->m_sprites))
+    {
+        return sprites + spr_idx;
+    }
+    return NULL;
+}
+
+Sound* get_sound(Assets_t *assets, const char *name)
+{
+    uint8_t snd_idx = sc_map_get_s64(&assets->m_sounds, name);
+    if (sc_map_found(&assets->m_sounds))
+    {
+        return sfx + snd_idx;
+    }
+    return NULL;
+}
+
+Font* get_font(Assets_t *assets, const char *name)
+{
+    uint8_t fnt_idx = sc_map_get_s64(&assets->m_fonts, name);
+    if (sc_map_found(&assets->m_fonts))
+    {
+        return fonts + fnt_idx;
+    }
+    return NULL;
+}
+
+void draw_sprite(Sprite_t *spr, Vector2 pos)
+{
+    Rectangle rec = {
+        spr->origin.x + spr->frame_size.x * spr->current_frame,
+        spr->origin.y,
+        spr->frame_size.x,
+        spr->frame_size.y
+    };
+    DrawTextureRec(*spr->texture, rec, pos, WHITE);
+}

engine/assets.h

@@ -0,0 +1,32 @@
+#ifndef __ASSETS_H
+#define __ASSETS_H
+#include "sc/map/sc_map.h"
+#include "components.h"
+#include "raylib.h"
+
+typedef struct Assets
+{
+    struct sc_map_s64 m_textures;
+    struct sc_map_s64 m_sounds;
+    struct sc_map_s64 m_fonts;
+    struct sc_map_s64 m_sprites;
+}Assets_t;
+
+
+void init_assets(Assets_t *assets);
+void free_all_assets(Assets_t *assets);
+void term_assets(Assets_t *assets);
+
+Texture2D* add_texture(Assets_t *assets, char *name, char *path);
+Sprite_t* add_sprite(Assets_t *assets, char *name, Texture2D* texture);
+Sound* add_sound(Assets_t *assets, char *name, char *path);
+Font* add_font(Assets_t *assets, char *name, char *path);
+
+
+Texture2D* get_texture(Assets_t *assets, const char *name);
+Sprite_t* get_sprite(Assets_t *assets, const char *name);
+Sound* get_sound(Assets_t *assets, const char *name);
+Font* get_font(Assets_t *assets, const char *name);
+
+void draw_sprite(Sprite_t *spr, Vector2 pos);
+#endif // __ASSETS_H

engine/assets_maps.c

@@ -0,0 +1,8 @@
+#include "assets_maps.h"
+
+
+const char * const player_sprite_map[N_PLAYER_SPRITES] =
+{
+    "plr_stand",
+    "plr_run",
+};

engine/assets_maps.h

@@ -0,0 +1,13 @@
+#ifndef __ASSETS_MAPS_H
+#define __ASSETS_MAPS_H
+
+#define N_PLAYER_SPRITES 2
+enum PlayerSpriteEnum
+{
+    SPR_PLAYER_STAND = 0,
+    SPR_PLAYER_RUN
+};
+
+extern const char * const player_sprite_map[N_PLAYER_SPRITES];
+
+#endif // __ASSETS_MAPS_H

engine/editor_scene.c

@@ -1,6 +1,7 @@
 #include "scene_impl.h"
 #include "game_systems.h"
 #include "constants.h"
+#include "assets_maps.h"
 #include "raylib.h"
 #include "raymath.h"
 #include <stdio.h>
@@ -92,6 +93,12 @@ static void level_scene_render_func(Scene_t* scene)
             };
             DrawRectangleLinesEx(rec, 1.5, PURPLE);
         }
+        CSprite_t* p_cspr = get_component(&scene->ent_manager, p_ent, CSPRITE_T);
+        if (p_cspr != NULL)
+        {
+            Vector2 pos = Vector2Add(p_ct->position, p_cspr->offset);
+            draw_sprite(p_cspr->sprite, pos);
+        }
     }
 
     for (size_t i=0; i<tilemap.n_tiles;++i)
@@ -204,6 +211,10 @@ static void spawn_player(Scene_t *scene)
         .width = p_bbox->size.x + 2,
         .height = p_bbox->size.y - 1,
     };
+    CSprite_t* p_cspr = add_component(&scene->ent_manager, p_ent, CSPRITE_T);
+    p_cspr->sprite = get_sprite(&scene->engine->assets, "plr_stand");
+    p_cspr->sprites_map = player_sprite_map;
+    p_cspr->transition_func = &player_sprite_transition_func;
 }
 
 static void toggle_block_system(Scene_t *scene)
@@ -328,6 +339,7 @@ void init_level_scene(LevelScene_t *scene)
     //sc_array_add(&scene->scene.systems, &update_tilemap_system);
     sc_array_add(&scene->scene.systems, &state_transition_update_system);
     sc_array_add(&scene->scene.systems, &player_ground_air_transition_system);
+    sc_array_add(&scene->scene.systems, &sprite_animation_system);
     sc_array_add(&scene->scene.systems, &toggle_block_system);
 
     // This avoid graphical glitch, not essential

engine/engine.h

@@ -3,6 +3,8 @@
 #include "entManager.h"
 #include "actions.h"
 #include "sc/array/sc_array.h"
+#include "assets.h"
+
 typedef struct Scene Scene_t;
 
 typedef struct GameEngine
@@ -10,6 +12,7 @@ typedef struct GameEngine
     Scene_t **scenes;
     unsigned int max_scenes;
     unsigned int curr_scene;
+    Assets_t assets;
 }GameEngine_t;
 void change_scene(GameEngine_t *engine, unsigned int idx);
 

engine/game_systems.c

@@ -1,6 +1,7 @@
 #include "game_systems.h"
 #include "AABB.h"
 #include "constants.h"
+#include "assets_maps.h"
 #include <stdio.h>
 
 static const Vector2 TILE_SZ = {TILE_SIZE, TILE_SIZE};
@@ -888,6 +889,39 @@ void hitbox_update_system(Scene_t *scene)
     }
 }
 
+void sprite_animation_system(Scene_t *scene)
+{
+    unsigned int ent_idx;
+    CSprite_t* p_cspr;
+    sc_map_foreach(&scene->ent_manager.component_map[CSPRITE_T], ent_idx, p_cspr)
+    {
+        Entity_t *p_ent =  get_entity(&scene->ent_manager, ent_idx);
+        // Update animation state
+        if (p_cspr->transition_func != NULL)
+        {
+            unsigned int spr_idx = p_cspr->transition_func(p_ent);
+            if (p_cspr->current_idx != spr_idx)
+            {
+                Sprite_t* new_spr = get_sprite(&scene->engine->assets, p_cspr->sprites_map[spr_idx]);
+                if (new_spr != NULL)
+                {
+                    p_cspr->sprite = new_spr;
+                    p_cspr->current_idx = spr_idx;
+                    p_cspr->sprite->current_frame = 0;
+                }
+            }
+        }
+        // Animate it (handle frame count)
+        p_cspr->sprite->elapsed++;
+        if (p_cspr->sprite->elapsed == p_cspr->sprite->speed)
+        {
+            p_cspr->sprite->current_frame++;
+            p_cspr->sprite->current_frame %= p_cspr->sprite->frame_count;
+            p_cspr->sprite->elapsed = 0;
+        }
+    }
+}
+
 void init_level_scene_data(LevelSceneData_t *data)
 {
     sc_map_init_32(&data->collision_events, 128, 0);
@@ -897,3 +931,8 @@ void term_level_scene_data(LevelSceneData_t *data)
 {
     sc_map_term_32(&data->collision_events);
 }
+
+unsigned int player_sprite_transition_func(Entity_t* ent)
+{
+    return SPR_PLAYER_RUN;
+}

engine/game_systems.h

@@ -14,4 +14,7 @@ void player_ground_air_transition_system(Scene_t* scene);
 void state_transition_update_system(Scene_t *scene);
 void update_tilemap_system(Scene_t *scene);
 void hitbox_update_system(Scene_t *scene);
+void sprite_animation_system(Scene_t *scene);
+
+unsigned int player_sprite_transition_func(Entity_t* ent);
 #endif // __GAME_SYSTEMS_H

lsan_supp.txt

@@ -1 +1,2 @@
 leak:X11
+leak:radeonsi_dri

run.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+LSAN_OPTIONS=suppressions=./lsan_supp.txt  ./build/$1

scene_test.c

@@ -6,14 +6,40 @@
 // Maintain own queue to handle key presses
 struct sc_queue_32 key_buffer;
 
+Scene_t *scenes[1];
+static GameEngine_t engine =
+{
+    .scenes = scenes,
+    .max_scenes = 1,
+    .curr_scene = 0,
+    .assets = {0}
+};
+
 int main(void)
 {
     sc_queue_init(&key_buffer);
     InitWindow(1280, 640, "raylib");
     SetTargetFPS(60);
     init_memory_pools();
+
+    init_assets(&engine.assets);
+    Texture2D* tex = add_texture(&engine.assets, "plr_tex", "res/test_tex.png");
+    Sprite_t* spr = add_sprite(&engine.assets, "plr_stand", tex);
+    spr->origin = (Vector2){0, 0};
+    spr->frame_size = (Vector2){32, 32};
+
+    spr = add_sprite(&engine.assets, "plr_run", tex);
+    spr->frame_count = 4;
+    spr->origin = (Vector2){0, 0};
+    spr->frame_size = (Vector2){32, 32};
+    spr->speed = 15;
+
     LevelScene_t scene;
+    scene.scene.engine = &engine;
     init_level_scene(&scene);
+    scenes[0] = &scene.scene;
+    change_scene(&engine, 0);
+
     while(true)
     {