Level transitions and main menu

1 files changed, 172 insertions, 0 deletions

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);
+	}
+}