gameloop example

examples/gameloop/Makefile

@@ -0,0 +1,59 @@
+TARGET=gameloop
+BUILD_DIR=build
+FSYSTEM_DIR=filesystem
+include $(N64_INST)/include/n64.mk
+
+src = gameloop.c
+assets_xm = $(wildcard assets/*.xm)
+assets_wav = $(wildcard assets/*.wav)
+assets_png = $(wildcard assets/*.png)
+assets_ttf = $(wildcard assets/*.ttf)
+
+assets_conv = $(addprefix filesystem/,$(notdir $(assets_xm:%.xm=%.xm64))) \
+              $(addprefix filesystem/,$(notdir $(assets_wav:%.wav=%.wav64))) \
+			  $(addprefix filesystem/,$(notdir $(assets_ttf:%.ttf=%.font64))) \
+              $(addprefix filesystem/,$(notdir $(assets_png:%.png=%.sprite)))
+
+#N64_CFLAGS = -Wno-error
+AUDIOCONV_FLAGS ?=
+MKSPRITE_FLAGS ?=
+
+all: $(TARGET).z64
+
+filesystem/%.xm64: assets/%.xm
+	@mkdir -p $(dir $@)
+	@echo "    [AUDIO] $@"
+	@$(N64_AUDIOCONV) $(AUDIOCONV_FLAGS) -o filesystem $<
+
+filesystem/%.wav64: assets/%.wav
+	@mkdir -p $(dir $@)
+	@echo "    [AUDIO] $@"
+	@$(N64_AUDIOCONV) --wav-compress 1 -o filesystem $<
+
+filesystem/%.sprite: assets/%.png
+	@mkdir -p $(dir $@)
+	@echo "    [SPRITE] $@"
+	@$(N64_MKSPRITE) --format RGBA32 $(MKSPRITE_FLAGS) -o filesystem "$<"
+
+filesystem/%.font64: assets/%.ttf
+	@mkdir -p $(dir $@)
+	@echo "    [FONT] $@"
+	@$(N64_MKFONT) $(MKFONT_FLAGS) -o filesystem "$<"
+
+#filesystem/n64brew.sprite: MKSPRITE_FLAGS=--format RGBA32 --tiles 32,32
+filesystem/background.sprite: MKSPRITE_FLAGS=--format RGBA16 --tiles 32,32
+#//filesystem/ninjafrog1.sprite: MKSPRITE_FLAGS=--format RGBA32 --tiles 32,32
+filesystem/Pacifico.font64: MKFONT_FLAGS+=--size 32
+
+$(BUILD_DIR)/$(TARGET).dfs: $(assets_conv)
+$(BUILD_DIR)/$(TARGET).elf: $(src:%.c=$(BUILD_DIR)/%.o)
+
+$(TARGET).z64: N64_ROM_TITLE="Game loop example"
+$(TARGET).z64: $(BUILD_DIR)/$(TARGET).dfs 
+
+clean:
+	rm -rf $(BUILD_DIR) $(FSYSTEM_DIR) $(TARGET).z64
+
+-include $(wildcard $(BUILD_DIR)/*.d)
+
+.PHONY: all clean

examples/gameloop/gameloop.c

@@ -0,0 +1,160 @@
+#include <libdragon.h>
+#include <math.h>
+#include <float.h>
+#include "n64sys.h"
+
+#define PLAYER_NUM_FRAMES (12)
+#define PLAYER_SPRITE_SIZE (32)
+
+static sprite_t *player_sprite;
+static sprite_t *apple_sprite;
+
+static wav64_t sfx_hit;
+
+enum {
+    FONT_PACIFICO = 1,
+};
+
+typedef struct vector2d_s {
+    float x;
+    float y;
+} vector2d_t;
+
+enum {
+    FACING_RIGHT = 0,
+    FACING_LEFT = 1,
+};
+
+static struct {
+    vector2d_t pos;
+} apple;
+
+static struct {
+    vector2d_t pos;
+    int facing;
+    int frame;
+    int anim_counter;
+} player;
+
+// Mixer channel allocation
+#define CHANNEL_SFX1    0
+#define CHANNEL_SFX2    2
+#define CHANNEL_SFX3    4
+#define CHANNEL_MUSIC   6
+
+static float distance_squared(vector2d_t *a, vector2d_t *b)
+{
+    float dx = a->x - b->x;
+    float dy = a->y - b->y;
+    return dx*dx + dy*dy;
+}
+
+void update(float deltatime)
+{
+    joypad_poll();
+    joypad_buttons_t buttons = joypad_get_buttons(JOYPAD_PORT_1);
+
+    const float player_speed = 150.0f; // Unit is pixels per second
+
+    if (buttons.d_left) {
+        player.pos.x -= deltatime * player_speed;
+        player.facing = FACING_LEFT;
+    }
+    if (buttons.d_right) {
+        player.pos.x += deltatime * player_speed;
+        player.facing = FACING_RIGHT;
+    }
+    if (buttons.d_up) {
+        player.pos.y -= deltatime * player_speed;
+    }
+    if (buttons.d_down) {
+        player.pos.y += deltatime * player_speed;
+    }
+
+    const int hit_radius = 25;
+
+    if (distance_squared(&player.pos, &apple.pos) < hit_radius * hit_radius) {
+        wav64_play(&sfx_hit, CHANNEL_SFX1);
+        const int margin = 20;
+        apple.pos.x = margin + rand() % (display_get_width() - 2*margin);
+        apple.pos.y = margin + rand() % (display_get_height() - 2*margin);
+    }
+}
+
+void render()
+{
+    surface_t *disp = display_get();
+    rdpq_attach_clear(disp, NULL);
+
+    rdpq_set_mode_standard();
+    rdpq_sprite_blit(apple_sprite, apple.pos.x, apple.pos.y, &(rdpq_blitparms_t){});
+    rdpq_sprite_blit(player_sprite, player.pos.x, player.pos.y, &(rdpq_blitparms_t){
+        .s0 = player.frame * PLAYER_SPRITE_SIZE,
+        .width = PLAYER_SPRITE_SIZE,
+        .flip_x = player.facing == FACING_LEFT
+    });
+
+    player.anim_counter++;
+    if (player.anim_counter > 5) {
+        player.frame = (player.frame + 1) % PLAYER_NUM_FRAMES;
+        player.anim_counter = 0;
+    }
+
+
+    rdpq_detach_show();
+}
+
+int main()
+{
+    debug_init_isviewer();
+    debug_init_usblog();
+
+    display_init(RESOLUTION_320x240, DEPTH_16_BPP, 3, GAMMA_NONE, FILTERS_RESAMPLE_ANTIALIAS_DEDITHER);
+
+    joypad_init();
+    timer_init();
+
+    uint32_t display_width = display_get_width();
+    uint32_t display_height = display_get_height();
+
+    dfs_init(DFS_DEFAULT_LOCATION);
+
+    rdpq_init();
+
+	audio_init(44100, 4);
+	mixer_init(20);
+
+	wav64_open(&sfx_hit, "rom:/blip.wav64");
+
+    player_sprite = sprite_load("rom:/ninjafrog.sprite");
+    apple_sprite = sprite_load("rom:/apple.sprite");
+
+    // rdpq_font_t *fnt1 = rdpq_font_load("rom:/Pacifico.font64");
+    // rdpq_font_style(fnt1, 0, &(rdpq_fontstyle_t){
+    //     .color = RGBA32(0xFD, 0xFE, 0x99, 0xFF),
+    // });
+    // rdpq_font_style(fnt1, 1, &(rdpq_fontstyle_t){
+    //     .color = RGBA32(0xFD, 0x9E, 0x99, 0xFF),
+    // });
+    // rdpq_text_register_font(FONT_PACIFICO, fnt1);
+
+    player.pos.x = 100;
+    player.pos.y = 50;
+    apple.pos.x = 200;
+    apple.pos.y = 75;
+
+    uint32_t last_ticks = get_ticks() - TICKS_FROM_MS(33);
+
+    while (1)
+    {
+        uint32_t now_ticks = get_ticks();
+        float deltatime = TICKS_DISTANCE(last_ticks, now_ticks) / (float)TICKS_PER_SECOND;
+        last_ticks = now_ticks;
+
+        update(deltatime);
+        render();
+
+        // Update audio if needed
+        mixer_try_play();
+    }
+}