core combo mechanic with classy HUD

CMakeLists.txt

@@ -62,7 +62,9 @@ set(ASSETS
   assets-cg/menu_title.png
   # HUD
   assets-cg/hud.png
+  assets-cg/hud_arcade_font.png
   assets-cg/hud_backpack.ase
+  assets-cg/hud_combo.png
   assets-cg/hud_delay.png
   assets-cg/hud_flag.png
   assets-cg/hud_itemslots.png

assets-cg/fxconv-metadata.txt

@@ -15,6 +15,9 @@ hud_backpack.ase:
   center: 0, 0
   next: Idle=Idle, Open=Idle, InventoryOpen=InventoryIdle, InventoryIdle=InventoryIdle, InventoryClose=Idle
 
+hud_arcade_font.png:
+  profile: p8
+
 font_rogue.png:
   type: font
   name: font_rogue

src/game.c

@@ -40,6 +40,8 @@ bool game_load(game_t *g, level_t const *level)
     g->wave_number = 0;
     g->wave_spawned = 0;
     g->wave_left = NULL;
+    g->combo = 0;
+    g->combo_health = fix(0);
 
     g->hud_xp_anim.frame = anims_hud_xp_Idle.start[0];
     g->hud_xp_anim.elapsed = 0;
@@ -293,6 +295,10 @@ void game_remove_dead_entities(game_t *g)
                 g->hud_xp_anim.elapsed = 0;
             }
 
+            /* Update player combo */
+            g->combo++;
+            g->combo_health = fix(1);
+
             entity_mark_to_delete(e);
         }
     }
@@ -465,6 +471,12 @@ void game_update_effects(game_t *g, fixed_t dt)
         f->invulnerability_delay = max(f->invulnerability_delay - dt, fix(0));
         f->speed_delay = max(f->speed_delay - dt, fix(0));
     }
+
+    g->combo_health -= dt / 5;
+    if(g->combo_health <= 0) {
+        g->combo_health = 0;
+        g->combo = 0;
+    }
 }
 
 void game_update_aoes(game_t *g, fixed_t dt)

src/game.h

@@ -49,6 +49,10 @@ typedef struct game {
 	int wave_number;
 	int wave_spawned;
 	uint8_t *wave_left;
+	/* Current combo score and its health (measured between 0 and 1, decreases
+	   at a variable rate) */
+	int combo;
+	fixed_t combo_health;
 
 	/* XP bar animation */
 	anim_state_t hud_xp_anim;

src/render.c

@@ -473,6 +473,50 @@ int render_small_text(int x, int y, int color, char const *text, int size)
     return 0;
 }
 
+static int render_arcade_char_size(int c)
+{
+    if(c < '0' || c > '9')
+        return 0;
+    return 7 - (c == '1' || c == '7') + (c == '4');
+}
+
+int render_arcade_dsize(int value)
+{
+    char str[16];
+    sprintf(str, "%d", value);
+
+    int pixels = 0;
+    for(int i = 0; str[i]; i++)
+        pixels += render_arcade_char_size(str[i]);
+    return pixels;
+
+    return pixels;
+}
+
+void render_arcade(int x, int y, int halign, int value, int color_style)
+{
+    extern bopti_image_t img_hud_arcade_font;
+    int w = render_arcade_dsize(value);
+    if(halign == DTEXT_RIGHT)
+        x -= w;
+    else if(halign == DTEXT_CENTER)
+        x -= (w >> 1);
+
+    /* Auto style based on the number of digits */
+    if(color_style < 0)
+        color_style = (value >= 10) + (value >= 100);
+
+    char str[16];
+    sprintf(str, "%d", value);
+
+    for(int i = 0; str[i]; i++) {
+        int w = render_arcade_char_size(str[i]);
+        dsubimage(x, y, &img_hud_arcade_font, 1 + 9 * (str[i] - '0'),
+            1 + 9 * color_style, w, 8, DIMAGE_NONE);
+        x += w;
+    }
+}
+
 static void print_stat_opt(int x, int y, int stat, int reference,
     char const *format, ...)
 {
@@ -596,10 +640,8 @@ void render_game(game_t const *g, bool show_hitboxes)
     extern font_t font_hud;
     player_data_t *player_data = player_f->player;
     dfont(&font_hud);
-    dprint_opt(164, HUD_Y - 5, RGB24(0x15171a), C_NONE, DTEXT_CENTER,
-        DTEXT_TOP, "%d", player_data->xp_level);
-    dprint_opt(164, HUD_Y - 6, RGB24(0xabb1ba), C_NONE, DTEXT_CENTER,
-        DTEXT_TOP, "%d", player_data->xp_level);
+    dprint(167, HUD_Y - 5, RGB24(0x15171a), "%d", player_data->xp_level);
+    dprint(167, HUD_Y - 6, RGB24(0xabb1ba), "%d", player_data->xp_level);
     dfont(&font_rogue);
 
     /* Render life bar */
@@ -656,6 +698,14 @@ void render_game(game_t const *g, bool show_hitboxes)
     /* Render backpack icon */
     anim_frame_render(skill_x(5)+2, HUD_Y-33+2, g->hud_backpack_anim.frame);
 
+    /* Render combo score */
+    extern bopti_image_t img_hud_combo;
+    fill_height = fround(img_hud_combo.height * g->combo_health);
+    dsubimage(224, HUD_Y - 9 - fill_height, &img_hud_combo,
+        0, img_hud_combo.height - fill_height, img_hud_combo.width,
+        fill_height, DIMAGE_NONE);
+    render_arcade(234, HUD_Y-25, DTEXT_CENTER, g->combo, -1);
+
     if(g->menu_time > 0) {
         int x1 = cubic(-130, 0, g->menu_time, fix(1));
         int x2 = DWIDTH - 130 - x1;

src/render.h

@@ -74,3 +74,7 @@ void render_pfg_all2one(pfg_all2one_t const *paths, camera_t const *c,
 
 /* Render one of some predefined short strings using an image. */
 int render_small_text(int x, int y, int color, char const *text, int size);
+
+/* Colored arcade font. */
+int render_arcade_dsize(int value);
+void render_arcade(int x, int y, int halign, int value, int color_style);