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Implement run mechanic and level progression with top-left HUD indicator

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Run (B + direction):
- player_logic.c: while holding B + direction with stamina >= 10, each tile
  takes 8 frames instead of 16 (move_progress += 2, LERP >>4 unchanged) and
  costs 10 stamina per tile. DAS_REPEAT_RUN=2 chains tiles fluidly.
- Falls back silently to normal walk when stamina < 10.

Level progression:
- New global 'level' (starts at 1). title->game resets to 1; reaching the
  hatch (victory/Going Deeper) + START increments before engine_init (new
  maze); defeat + START resets to 1.
- Top-left HUD 'L<n>' via 3 sprites (OAM 23-25) from new level.png asset
  (glyphs L, 0-9), generated by scripts/generate_level.py and converted
  with png2asset -keep_duplicate_tiles for predictable tile ordering.
- VRAM base aligned to an EVEN index (8x16 hardware ignores tile LSB) and
  placed after the stamina load claim to avoid the shared BG tile block.
- update_level_display() called every frame; hides during game over/title.

Docs: README, doc/gameplay.md and the technical report updated.
This commit is contained in:
Matteo Benedetto
2026-06-24 11:56:19 +02:00
parent ae0706ccfb
commit 36e52d4d1a
15 changed files with 506 additions and 12 deletions
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Makefile
+5 -2
View File
@@ -9,14 +9,15 @@ SCRIPTS_DIR = scripts
BUILD_DIR = build
# C source files
SRCS = $(SRC_DIR)/main.c $(SRC_DIR)/engine.c $(SRC_DIR)/globals.c $(SRC_DIR)/maze.c $(SRC_DIR)/sound.c $(SRC_DIR)/render.c $(SRC_DIR)/player_logic.c $(SRC_DIR)/enemy_logic.c $(SRC_DIR)/tiles.c $(SRC_DIR)/player.c $(SRC_DIR)/enemy.c $(SRC_DIR)/gameover.c $(SRC_DIR)/next_level.c $(SRC_DIR)/stamina.c $(SRC_DIR)/title_bg.c
SRCS = $(SRC_DIR)/main.c $(SRC_DIR)/engine.c $(SRC_DIR)/globals.c $(SRC_DIR)/maze.c $(SRC_DIR)/sound.c $(SRC_DIR)/render.c $(SRC_DIR)/player_logic.c $(SRC_DIR)/enemy_logic.c $(SRC_DIR)/tiles.c $(SRC_DIR)/player.c $(SRC_DIR)/enemy.c $(SRC_DIR)/gameover.c $(SRC_DIR)/next_level.c $(SRC_DIR)/stamina.c $(SRC_DIR)/level.c $(SRC_DIR)/title_bg.c
all: $(BUILD_DIR)/hello_iso.gb $(BUILD_DIR)/test_gameover.gb
# Generate image assets
generate_images: $(SCRIPTS_DIR)/generate_assets.py $(SCRIPTS_DIR)/generate_enemy.py
generate_images: $(SCRIPTS_DIR)/generate_assets.py $(SCRIPTS_DIR)/generate_enemy.py $(SCRIPTS_DIR)/generate_level.py
cd $(ASSETS_DIR) && python3 ../$(SCRIPTS_DIR)/generate_assets.py
cd $(ASSETS_DIR) && python3 ../$(SCRIPTS_DIR)/generate_enemy.py
cd $(ASSETS_DIR) && python3 ../$(SCRIPTS_DIR)/generate_level.py
# Convert image assets to C source files
generate_c_assets: generate_images
@@ -26,6 +27,7 @@ generate_c_assets: generate_images
$(PNG2ASSET) $(ASSETS_DIR)/gameover.png -c $(SRC_DIR)/gameover.c -bpp 2 -noflip -keep_palette_order
$(PNG2ASSET) $(ASSETS_DIR)/next_level.png -c $(SRC_DIR)/next_level.c -map -bpp 2 -noflip -max_palettes 1
$(PNG2ASSET) $(ASSETS_DIR)/stamina.png -c $(SRC_DIR)/stamina.c -bpp 2 -noflip -keep_palette_order
$(PNG2ASSET) $(ASSETS_DIR)/level.png -c $(SRC_DIR)/level.c -sw 8 -sh 16 -bpp 2 -noflip -keep_palette_order -keep_duplicate_tiles
$(PNG2ASSET) $(ASSETS_DIR)/title_bg.png -c $(SRC_DIR)/title_bg.c -map -bpp 2 -noflip -keep_palette_order -max_palettes 1
# Main ROM target
@@ -46,4 +48,5 @@ clean:
rm -f $(SRC_DIR)/gameover.c $(SRC_DIR)/gameover.h
rm -f $(SRC_DIR)/next_level.c $(SRC_DIR)/next_level.h
rm -f $(SRC_DIR)/stamina.c $(SRC_DIR)/stamina.h
rm -f $(SRC_DIR)/level.c $(SRC_DIR)/level.h
rm -f $(SRC_DIR)/title_bg.c $(SRC_DIR)/title_bg.h