small sprites. try dependency generation but doesnt work.

Makefile

@@ -2,6 +2,8 @@
 #
 # Copyright (C) 2025 Thomas Buck <thomas@xythobuz.de>
 #
+# https://gbdk.org/docs/api/docs_toolchain_settings.html
+#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
@@ -35,7 +37,10 @@ PNGA := $(GBDK_HOME)/bin/png2asset
 ROMU := $(GBDK_HOME)/bin/romusage
 GB_EMU := gearboy
 
-LCCFLAGS := -Wa-l -Wl-m -Wm"-yn Duality" -I$(BUILD_DIR)/$(DATA_DIR) -Wm-yc
+LCCFLAGS := -Wa-l -Wl-m -Wp-MMD
+LCCFLAGS += -I$(BUILD_DIR)/$(DATA_DIR)
+LCCFLAGS += -Wm"-yn Duality" -Wm-yc
+
 EMUFLAGS := $(BIN)
 
 ifndef GBDK_RELEASE
@@ -48,7 +53,12 @@ endif
 
 $(info BUILD_TYPE is $(BUILD_TYPE))
 
-.PHONY: all run $(BIN) clean compile_commands.json usage
+# TODO this is not working. why?!
+#DEPS=$(OBJS:%.o=%.d)
+#-include $(DEPS)
+
+.PHONY: all run clean compile_commands.json usage
+.PRECIOUS: $(BUILD_DIR)/$(DATA_DIR)/%.c $(BUILD_DIR)/$(DATA_DIR)/%.h
 
 all: $(BIN)
 
@@ -69,7 +79,6 @@ run: $(BIN)
 	@echo Emulating $<
 	@$(GB_EMU) $(EMUFLAGS)
 
-.PRECIOUS: $(BUILD_DIR)/$(DATA_DIR)/%.c $(BUILD_DIR)/$(DATA_DIR)/%.h
 $(BUILD_DIR)/$(DATA_DIR)/%.c $(BUILD_DIR)/$(DATA_DIR)/%.h: $(DATA_DIR)/%.png
 	@mkdir -p $(@D)
 	$(if $(findstring _map,$<),           \
@@ -99,8 +108,9 @@ $(BUILD_DIR)/$(BIN): $(OBJS)
 	@echo Linking $@
 	@$(LCC) $(LCCFLAGS) -o $@ $(OBJS)
 
-$(BIN): $(BUILD_DIR)/$(BIN) usage
+$(BIN): $(BUILD_DIR)/$(BIN)
 	@cp $< $@
+	@make usage
 
 clean:
 	rm -rf $(BUILD_DIR) $(BIN)

src/main.c

@@ -47,7 +47,7 @@ enum ACCELERATION {
 
 #define SPEED_INC 1
 #define SPEED_MAX 16
-#define SHOT_SPEED 8
+#define SHOT_SPEED 23
 
 #define BAR_OFFSET_X (4 - 80)
 #define HEALTH_OFFSET_Y -16
@@ -134,6 +134,8 @@ static void game(void) {
     // TODO remove
     obj_add(SPR_LIGHT, 64, 64, 0, 0);
     obj_add(SPR_DARK, -64, -64, 0, 0);
+    obj_add(SPR_SHOT_LIGHT, 32, 32, 0, 0);
+    obj_add(SPR_SHOT_DARK, -32, -32, 0, 0);
 
     while(1) {
         KEY_INPUT;

src/obj.c

@@ -24,8 +24,34 @@
 #include "obj.h"
 #include "sprites.h"
 
-#define MAX_OBJ 10
-#define MAX_TRAVEL 250
+/*
+ * sprite budget:
+ *
+ * fixed:
+ * ship: 4
+ * thruster: 1
+ * health: 4
+ * power: 4
+ * --> 13 fixed
+ *
+ * hardware tiles: 40 - 13 = 27
+ *
+ * dynamic:
+ * shot: 1
+ * light: 4
+ * dark: 4
+ * --> 2x dark & 2x light = 16
+ * --> 5x shot & 6x small = 11
+ * --> 16 + 11 = 27
+ */
+#define MAX_DARK 2
+#define MAX_LIGHT 2
+#define MAX_SHOT 5
+#define MAX_SHOT_DARK 3
+#define MAX_SHOT_LIGHT 3
+#define MAX_OBJ ((4 * MAX_DARK) + (4 * MAX_LIGHT) + MAX_SHOT + MAX_SHOT_DARK + MAX_SHOT_LIGHT)
+
+#define MAX_TRAVEL 32
 
 struct obj {
     uint8_t active;
@@ -43,7 +69,20 @@ void obj_init(void) {
     memset(objs, 0, sizeof(objs));
 }
 
-int8_t obj_add(enum SPRITES sprite, int16_t off_x, int16_t off_y, int16_t spd_x, int16_t spd_y) {
+static uint8_t cnt_sprite(enum SPRITES sprite) {
+    uint8_t cnt = 0;
+    for (uint8_t i = 0; i < MAX_OBJ; i++) {
+        if (!objs[i].active) {
+            continue;
+        }
+        if (objs[i].sprite == sprite) {
+            cnt++;
+        }
+    }
+    return cnt;
+}
+
+enum OBJ_STATE obj_add(enum SPRITES sprite, int16_t off_x, int16_t off_y, int16_t spd_x, int16_t spd_y) {
     uint8_t obj_cnt = 0xFF;
     for (uint8_t i = 0; i < MAX_OBJ; i++) {
         if (!objs[i].active) {
@@ -55,6 +94,14 @@ int8_t obj_add(enum SPRITES sprite, int16_t off_x, int16_t off_y, int16_t spd_x,
         return OBJ_LIST_FULL;
     }
 
+    if (((sprite == SPR_DARK) && (cnt_sprite(sprite) >= MAX_DARK))
+            || ((sprite == SPR_LIGHT) && (cnt_sprite(sprite) >= MAX_LIGHT))
+            || ((sprite == SPR_SHOT) && (cnt_sprite(sprite) >= MAX_SHOT))
+            || ((sprite == SPR_SHOT_DARK) && (cnt_sprite(sprite) >= MAX_SHOT_DARK))
+            || ((sprite == SPR_SHOT_LIGHT) && (cnt_sprite(sprite) >= MAX_SHOT_LIGHT))) {
+        return OBJ_TYPE_FULL;
+    }
+
     objs[obj_cnt].active = 1;
     objs[obj_cnt].sprite = sprite;
     objs[obj_cnt].off_x = off_x << 4;

src/obj.h

@@ -23,11 +23,14 @@
 #include <stdint.h>
 #include "sprites.h"
 
-#define OBJ_ADDED 0
-#define OBJ_LIST_FULL -1
+enum OBJ_STATE {
+    OBJ_ADDED = 0,
+    OBJ_LIST_FULL,
+    OBJ_TYPE_FULL,
+};
 
 void obj_init(void);
-int8_t obj_add(enum SPRITES sprite, int16_t off_x, int16_t off_y, int16_t spd_x, int16_t spd_y);
+enum OBJ_STATE obj_add(enum SPRITES sprite, int16_t off_x, int16_t off_y, int16_t spd_x, int16_t spd_y);
 void obj_draw(int16_t spd_x, int16_t spd_y, uint8_t *hiwater);
 
 #endif // __OBJ_H__

src/sprites.c

@@ -103,6 +103,20 @@ static struct sprites metasprites[SPRITE_COUNT] = {
         .cnt = shoot_TILE_COUNT,
         .off = TILE_NUM_START
     }, {
+        .ms = shoot_metasprites,
+        .ti = shoot_tiles,
+        .pa = NULL,
+        .pa_i = OAMF_CGB_PAL2,
+        .cnt = shoot_TILE_COUNT,
+        .off = SPR_SHOT
+    }, {
+        .ms = shoot_metasprites,
+        .ti = shoot_tiles,
+        .pa = NULL,
+        .pa_i = OAMF_CGB_PAL3,
+        .cnt = shoot_TILE_COUNT,
+        .off = SPR_SHOT
+    }, {
         .ms = health_metasprites,
         .ti = health_tiles,
         .pa = health_palettes,

src/sprites.h

@@ -32,6 +32,8 @@ enum SPRITES {
     SPR_LIGHT,
     SPR_DARK,
     SPR_SHOT,
+    SPR_SHOT_LIGHT,
+    SPR_SHOT_DARK,
     SPR_HEALTH,
     SPR_POWER,