From 26cc567b7f9822c52e01219822351cf900b8bef6 Mon Sep 17 00:00:00 2001
From: En Yi <en.yi@tutanota.com>
Date: Mon, 6 Nov 2023 21:36:23 +0800
Subject: [PATCH] Add emitter config to asset file loading

---
 engine/assets.c        |  2 +-
 engine/assets.h        |  2 +-
 engine/particle_sys.h  |  1 +
 scene_test.c           |  9 ---------
 scenes/assets_loader.c | 38 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 41 insertions(+), 11 deletions(-)

diff --git a/engine/assets.c b/engine/assets.c
index 19ca3f9..af94556 100644
--- a/engine/assets.c
+++ b/engine/assets.c
@@ -142,7 +142,7 @@ Font* add_font(Assets_t* assets, const char* name, const char* path)
     return &fonts[fnt_idx].font;
 }
 
-EmitterConfig_t* add_emitter_conf(Assets_t* assets, const char* name, Sprite_t* sprite)
+EmitterConfig_t* add_emitter_conf(Assets_t* assets, const char* name)
 {
     uint8_t emitter_idx = n_loaded[5];
     assert(emitter_idx < MAX_EMITTER_CONF);
diff --git a/engine/assets.h b/engine/assets.h
index 7e5747b..37517bd 100644
--- a/engine/assets.h
+++ b/engine/assets.h
@@ -59,7 +59,7 @@ Texture2D* add_texture_rres(Assets_t* assets, const char* name, const char* file
 LevelPack_t* add_level_pack_rres(Assets_t* assets, const char* name, const char* filename, const RresFileInfo_t* rres_file);
 
 Sprite_t* add_sprite(Assets_t* assets, const char* name, Texture2D* texture);
-EmitterConfig_t* add_emitter_conf(Assets_t* assets, const char* name, Sprite_t* sprite);
+EmitterConfig_t* add_emitter_conf(Assets_t* assets, const char* name);
 
 Texture2D* get_texture(Assets_t* assets, const char* name);
 Sprite_t* get_sprite(Assets_t* assets, const char* name);
diff --git a/engine/particle_sys.h b/engine/particle_sys.h
index 5c21f53..8c81e52 100644
--- a/engine/particle_sys.h
+++ b/engine/particle_sys.h
@@ -10,6 +10,7 @@
 typedef enum PartEmitterType
 {
     EMITTER_BURST = 0,
+    EMITTER_UNKNOWN,
 } PartEmitterType_t;
 
 typedef struct Particle
diff --git a/scene_test.c b/scene_test.c
index d2d4835..fec6d74 100644
--- a/scene_test.c
+++ b/scene_test.c
@@ -62,15 +62,6 @@ int main(void)
     scenes[0] = &scene.scene;
     change_scene(&engine, 0);
 
-    EmitterConfig_t* conf = add_emitter_conf(&engine.assets, "pe_burst", get_sprite(&engine.assets, "bomb"));
-    conf->launch_range[0] = 240;
-    conf->launch_range[1] = 300;
-    conf->one_shot = true;
-    conf->speed_range[0] = 200;
-    conf->speed_range[1] = 300;
-    conf->particle_lifetime[0] = 30;
-    conf->particle_lifetime[1] = 110;
-
     #if defined(PLATFORM_WEB)
         puts("Setting emscripten main loop");
         emscripten_set_main_loop(update_loop, 0, 1);
diff --git a/scenes/assets_loader.c b/scenes/assets_loader.c
index 106ce84..bf9a615 100644
--- a/scenes/assets_loader.c
+++ b/scenes/assets_loader.c
@@ -36,6 +36,27 @@ static bool parse_sprite_info(char* sprite_info_str, SpriteInfo_t* spr_info)
     return data_count == 6;
 }
 
+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_type,
+        conf->launch_range, conf->launch_range + 1,
+        conf->speed_range, conf->speed_range + 1,
+        conf->particle_lifetime, conf->particle_lifetime + 1,
+        &one_shot
+    );
+
+    if (data_count == 8)
+    {
+        conf->type = (emitter_type == 'b') ? EMITTER_BURST : EMITTER_UNKNOWN;
+        conf->one_shot = (one_shot == 1);
+    }
+    return data_count == 8;
+}
+
 bool load_from_rres(const char* file, Assets_t* assets)
 {
     RresFileInfo_t rres_file;
@@ -192,6 +213,10 @@ bool load_from_infofile(const char* file, Assets_t* assets)
             {
                 info_type = SOUND_INFO;
             }
+            else if (strcmp(tmp, "Emitter") == 0)
+            {
+                info_type = EMITTER_INFO;
+            }
             else if (strcmp(tmp, "LevelPack") == 0)
             {
                 info_type = LEVELPACK_INFO;
@@ -265,6 +290,19 @@ bool load_from_infofile(const char* file, Assets_t* assets)
                     spr->speed = spr_info.speed;
                 }
                 break;
+                case EMITTER_INFO:
+                {
+                    EmitterConfig_t parsed_conf;
+                    if (!parse_emitter_info(info_str, &parsed_conf))
+                    {
+                        printf("Parse error for emitter %s", name);
+                        break;
+                    }
+                    EmitterConfig_t* conf = add_emitter_conf(assets, name);
+                    *conf = parsed_conf;
+                    printf("Added Emitter %s\n", name);
+                }
+                break;
                 default:
                 break;
             }