From 0e75a2949678cb8a68fb0819355864aa6db2cb43 Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Sat, 5 Oct 2024 12:13:47 +1000
Subject: Level transitions and main menu

---
 1bitjam.c                 |  16 ++---
 Makefile                  |   3 +
 game.c                    | 172 ++++++++++++++++++++++++++++++++++++++++++++++
 game.h                    |  35 ++++++++++
 intermediate/fade_in.anm  |  11 +++
 intermediate/fade_out.anm |  11 +++
 intermediate/hud.bmp      | Bin 9906 -> 40538 bytes
 intermediate/map.bmp      | Bin 41098 -> 41098 bytes
 map.c                     |  27 +++++++-
 map.h                     |   6 +-
 render.c                  |  28 ++++++++
 render.h                  |   7 ++
 12 files changed, 302 insertions(+), 14 deletions(-)
 create mode 100644 game.c
 create mode 100644 game.h
 create mode 100644 intermediate/fade_in.anm
 create mode 100644 intermediate/fade_out.anm

diff --git a/1bitjam.c b/1bitjam.c
index 547eee7..1b903c1 100644
--- a/1bitjam.c
+++ b/1bitjam.c
@@ -1,18 +1,17 @@
 #include "asset.h"
 #include "config.h"
+#include "game.h"
 #include "maths.h"
 #include "memory.h"
 #include "plat.h"
-#include "rect.h"
 #include "render.h"
-#include "world.h"
 
 int entrypoint(int argc, const char** argv, Arena* m) {
 	Heap h;
 	App* a;
 	FPS f;
 	Renderer r;
-	World* world;
+	Game* game;
 	(void)argc;
 	(void)argv;
 	init_maths();
@@ -24,19 +23,16 @@ int entrypoint(int argc, const char** argv, Arena* m) {
 	a = new_app(&h, game_name);
 	init_audio();
 	init_fps(&f, default_mpf);
-	world = arena_alloc(m, sizeof world);
-	init_world(world);
-	generate_floor(&world->map, world);
+	game = arena_alloc(m, sizeof *game);
+	init_game(game, game_state_menu);
 	while (a->o) {
 		fps_begin(&f);
 		while (f.now >= f.next && a->o) {
 			app_begin(a);
-
-			update_world(world, a);
-
+			update_game(game, a);
 			ren_begin(&r, a->fb, viewport_w, viewport_h);
 			ren_clear(&r);
-			ren_world(world, &r);
+			ren_game(game, &r);
 			ren_end(&r);
 			app_end(a);
 			fps_update(&f);
diff --git a/Makefile b/Makefile
index 2b6252e..b7582d1 100644
--- a/Makefile
+++ b/Makefile
@@ -49,6 +49,7 @@ sources = \
 	deathzone.c \
 	effect.c \
 	enemy.c \
+	game.c \
 	hud.c \
 	map.c \
 	maths.c \
@@ -80,6 +81,8 @@ anim_sources = \
 	$(int_dir)/demon_jump_right.anm \
 	$(int_dir)/demon_walk_left.anm \
 	$(int_dir)/demon_walk_right.anm \
+	$(int_dir)/fade_in.anm \
+	$(int_dir)/fade_out.anm \
 	$(int_dir)/guy_fall_left.anm \
 	$(int_dir)/guy_fall_right.anm \
 	$(int_dir)/guy_idle_left.anm \
diff --git a/game.c b/game.c
new file mode 100644
index 0000000..07b0264
--- /dev/null
+++ b/game.c
@@ -0,0 +1,172 @@
+#include "animation.h"
+#include "asset.h"
+#include "game.h"
+#include "plat.h"
+#include "render.h"
+
+const Rect logo_rect = { 47, 0, 54, 16 };
+
+void init_game(Game* g, Game_State s) {
+	World* w = &g->w;
+	g->st = s;
+	g->frame = 0;
+	g->want_next = 0;
+	init_world(w);
+}
+
+void update_menu(Game* g, App* a) {
+	int i;
+	for (i = 0; i < btn_count; i++)
+		if (a->btn_states[i] & btn_state_pressed) {
+			queue_gs(g, game_state_fade_out);
+			queue_gs(g, game_state_generate);
+			queue_gs(g, game_state_fade_in);
+			queue_gs(g, game_state_play);
+			g->want_next = 1;
+			return;
+		}
+}
+
+void queue_gs(Game* g, Game_State s) {
+	assert(g->qt < game_max_state_queue);
+	g->sq[g->qt++] = s;
+}
+
+void on_transition(Game* g) {
+	g->ff = 0;
+}
+
+void next_gs(Game* g) {
+	int i, e = --g->qt;
+	g->ps = g->st;
+	g->st = g->sq[0];
+	for (i = 0; i < e; i++)
+		g->sq[i] = g->sq[i + 1];
+	on_transition(g);
+}
+
+void detect_next(Game* g, const World* w) {
+	const Player* p = &w->player;
+	if (p->y < 0) /* next level */ {
+		queue_gs(g, game_state_fade_out);
+		queue_gs(g, game_state_generate);
+		queue_gs(g, game_state_fade_in);
+		queue_gs(g, game_state_play);
+		g->want_next = 1;
+	}
+}
+
+void update_game(Game* g, App* a) {
+	const Animation* fa;
+	if (g->want_next) {
+		next_gs(g);
+		g->want_next = 0;
+	}
+	switch (g->st) {
+		case game_state_menu:
+			update_menu(g, a);
+			break;
+		case game_state_over:
+			break;
+		case game_state_fade_in:
+			fa = get_animation(asset_id_fade_in_anm);
+			if (g->ff < fa->fc * fa->s - 1)
+				update_anim(fa, &g->ff, &g->fr);
+			else
+				g->want_next = 1;
+			break;
+		case game_state_fade_out:
+			fa = get_animation(asset_id_fade_out_anm);
+			if (g->ff < fa->fc * fa->s - 1)
+				update_anim(fa, &g->ff, &g->fr);
+			else
+				g->want_next = 1;
+			break;
+		case game_state_generate:
+			generate_floor(&g->w.map, &g->w);
+			g->want_next = 1;
+			break;
+		case game_state_play:
+			update_world(&g->w, a);
+			detect_next(g, &g->w);
+			break;
+	}
+	g->frame++;
+}
+
+void ren_menu(const Game* g, Renderer* r) {
+	const Bitmap* bm = get_bitmap(asset_id_hud_img);
+	const int hv = viewport_w >> 1;
+	ren_map(
+		r,
+		hv - (logo_rect.w >> 1),
+		100,
+		&logo_rect,
+		bm
+	);
+	if (g->frame & 3)
+		ren_text(
+			r,
+			hv - 38,
+			155,
+			"ANY BUTTON TO START"
+		);
+	ren_text(
+		r,
+		hv - 24,
+		200,
+		"made by quou"
+	);
+	ren_text(
+		r,
+		hv - 44,
+		205,
+		"public domain software"
+	);
+	ren_text(
+		r,
+		hv - 16,
+		210,
+		"quou.xyz"
+	);
+}
+
+void ren_state(const Game* g, Game_State s, Renderer* r) {
+	switch (s) {
+		case game_state_menu:
+			ren_menu(g, r);
+			break;
+		case game_state_over:
+			break;
+		case game_state_generate:
+			break;
+		case game_state_play:
+			ren_world(&g->w, r);
+			break;
+		default: break;
+	}
+}
+
+void ren_fade(const Game* g, Renderer* r) {
+	const Bitmap* bm = get_bitmap(asset_id_hud_img);
+	const Rect* re = &g->fr;
+	int x, y;
+	for (y = 0; y < viewport_h; y += re->h)
+		for (x = 0; x < viewport_w; x += re->w)
+			ren_cmap(r, x, y, re, bm);
+}
+
+void ren_game(const Game* g, Renderer* r) {
+	switch (g->st) {
+		case game_state_fade_in:
+			ren_state(g, g->sq[1], r);
+			ren_fade(g, r);
+			break;
+		case game_state_fade_out:
+			ren_state(g, g->ps, r);
+			ren_fade(g, r);
+			break;
+		default:
+			ren_state(g, g->st, r);
+	}
+}
diff --git a/game.h b/game.h
new file mode 100644
index 0000000..590cc56
--- /dev/null
+++ b/game.h
@@ -0,0 +1,35 @@
+#ifndef game_h
+#define game_h
+
+#include "world.h"
+
+struct Renderer;
+struct App;
+
+#define game_max_state_queue 8
+
+typedef enum {
+	game_state_menu,
+	game_state_play,
+	game_state_generate,
+	game_state_fade_in,
+	game_state_fade_out,
+	game_state_over
+} Game_State;
+
+typedef struct {
+	World w;
+	Game_State st, ps;
+	Game_State sq[game_max_state_queue];
+	Rect fr;
+	int want_next;
+	int qt, frame, ff;
+} Game;
+
+void init_game(Game* g, Game_State s);
+void update_game(Game* g, struct App* a);
+void ren_game(const Game* g, struct Renderer* r);
+void queue_gs(Game* g, Game_State s);
+void next_gs(Game* g);
+
+#endif
diff --git a/intermediate/fade_in.anm b/intermediate/fade_in.anm
new file mode 100644
index 0000000..d417eca
--- /dev/null
+++ b/intermediate/fade_in.anm
@@ -0,0 +1,11 @@
+2
+{ 37, 90, 10, 10 }
+{ 37, 80, 10, 10 }
+{ 37, 70, 10, 10 }
+{ 37, 60, 10, 10 }
+{ 37, 50, 10, 10 }
+{ 37, 40, 10, 10 }
+{ 37, 30, 10, 10 }
+{ 37, 20, 10, 10 }
+{ 37, 10, 10, 10 }
+{ 37,  0, 10, 10 }
diff --git a/intermediate/fade_out.anm b/intermediate/fade_out.anm
new file mode 100644
index 0000000..b6af0f4
--- /dev/null
+++ b/intermediate/fade_out.anm
@@ -0,0 +1,11 @@
+2
+{ 37,  0, 10, 10 }
+{ 37, 10, 10, 10 }
+{ 37, 20, 10, 10 }
+{ 37, 30, 10, 10 }
+{ 37, 40, 10, 10 }
+{ 37, 50, 10, 10 }
+{ 37, 60, 10, 10 }
+{ 37, 70, 10, 10 }
+{ 37, 80, 10, 10 }
+{ 37, 90, 10, 10 }
diff --git a/intermediate/hud.bmp b/intermediate/hud.bmp
index e2793ab..20dc791 100644
Binary files a/intermediate/hud.bmp and b/intermediate/hud.bmp differ
diff --git a/intermediate/map.bmp b/intermediate/map.bmp
index fd32c56..588a13d 100644
Binary files a/intermediate/map.bmp and b/intermediate/map.bmp differ
diff --git a/map.c b/map.c
index 9566aa2..41d224a 100644
--- a/map.c
+++ b/map.c
@@ -18,7 +18,7 @@ void generate_room(Map* m) {
 	const Bitmap* b = get_bitmap(asset_id_rooms_img);
 	const unsigned* p = (const unsigned*)&b[1];
 	const int max_rooms = b->h / map_h;
-	const int r = /*get_r() % max_rooms;*/ 1;
+	const int r = get_r() % max_rooms;
 	int o = r * map_w * map_h;
 	int e = map_w * map_h, i;
 	for (i = 0; i < e; i++, o++) {
@@ -39,6 +39,8 @@ unsigned short get_collider(Map_Tile t) {
 		case tile_window_mid:
 		case tile_window_bot:
 		case tile_brick_floor:
+		case tile_trapdoor1:
+		case tile_trapdoor2:
 		case tile_brick: return 1;
 		case tile_brick_ramp5:
 		case tile_stone_ramp5: return 2;
@@ -74,6 +76,8 @@ int imp_check(Map* m, Map_Tile t, int x, int y) {
 	m->tiles[x + y * map_w] = t
 #define place_o(t, ox, oy) \
 	m->tiles[x + ox + (y + oy) * map_w] = t
+#define place_a(t, x, y) \
+	m->tiles[x + y * map_w] = t
 
 void generate_ramps(Map* m) {
 	int x, y;
@@ -130,16 +134,33 @@ void generate_floors(Map* m) {
 		}
 }
 
+void generate_doors(Map* m) {
+	const int hx = map_w >> 1;
+	const int t = 0;
+	const int b = map_h - 1;
+	place_a(tile_trapdoor1, hx,      b);
+	place_a(tile_trapdoor2, hx + 1,  b);
+	place_a(tile_trapdoor3, hx,      t);
+	place_a(tile_trapdoor4, hx + 1,  t);
+}
+
 #undef check
 #undef place
 
 void generate_floor(Map* m, World* w) {
+	Player* p = &w->player;
 	generate_room(m);
 	generate_ramps(m);
+	generate_doors(m);
 	generate_floors(m);
 	generate_collision(m);
-	w->player.x = 16 << fbits;
-	w->player.y = 16 << fbits;
+	p->x = (map_w >> 1) << fbits;
+	p->y = (map_h - 2) << fbits;
+	p->x *= map_tile_size;
+	p->y *= map_tile_size;
+	p->x += (map_tile_size >> 1) << fbits;
+	p->vx = 0;
+	p->vy = 0;
 }
 
 void render_map(const Map* m, Renderer* r) {
diff --git a/map.h b/map.h
index 6a3021d..62263f5 100644
--- a/map.h
+++ b/map.h
@@ -39,7 +39,11 @@ struct World;
 	x(tile_window_top,   0,    48) \
 	x(tile_window_mid,   16,   48) \
 	x(tile_window_bot,   32,   48) \
-	x(tile_brick_floor,  48,   48)
+	x(tile_brick_floor,  48,   48) \
+	x(tile_trapdoor1,    64,   48) \
+	x(tile_trapdoor2,    80,   48) \
+	x(tile_trapdoor3,    96,   48) \
+	x(tile_trapdoor4,    112,  48)
 
 typedef enum {
 #define x(n, x, y) \
diff --git a/render.c b/render.c
index 07af8cf..ff7670b 100644
--- a/render.c
+++ b/render.c
@@ -114,6 +114,34 @@ void ren_map(
 	}
 }
 
+void ren_cmap(
+	Renderer* r,
+	int x,
+	int y,
+	const struct Rect* re,
+	const Bitmap* bm
+) {
+	Rect rect, su = *re;
+	const unsigned* data = (const unsigned*)&bm[1];
+	int i, j, sx, sy, ex, ey;
+	rect.x = x;
+	rect.y = y;
+	rect.w = re->w;
+	rect.h = re->h;
+	rect_clipsr(&rect, &su, r->clip);
+	ex = rect.x + rect.w;
+	ey = rect.y + rect.h;
+	for (j = rect.y, sy = su.y; j < ey; j++, sy++) {
+		for (i = rect.x, sx = su.x; i < ex; i++, sx++) {
+			int di = (i + j * r->w);
+			int si = (sx + sy * bm->w);
+			int bit = (1 << (si & 0x1f));
+			bit &= data[si >> 5];
+			r->t[di >> 5] &= ~((1 << (di & 0x1f)) * (bit != 0));
+		}
+	}
+}
+
 void ren_rect(
 	Renderer* r,
 	const struct Rect* re
diff --git a/render.h b/render.h
index e41572e..ca06ca3 100644
--- a/render.h
+++ b/render.h
@@ -27,6 +27,13 @@ void ren_map(
 	const struct Rect* re,
 	const Bitmap* bm
 );
+void ren_cmap(
+	Renderer* r,
+	int x,
+	int y,
+	const struct Rect* re,
+	const Bitmap* bm
+);
 void ren_rect(
 	Renderer* r,
 	const struct Rect* re
-- 
cgit v1.2.3-54-g00ecf