1 files changed, 128 insertions, 0 deletions
diff --git a/src/intro.c b/src/intro.c
new file mode 100644
index 0000000..7dc8476
--- /dev/null
+++ b/src/intro.c
@@ -0,0 +1,128 @@
+/*
+ *  Copyright (C) 2018  Vito Caputo - <vcaputo@pengaru.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 3 as published
+ *  by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <SDL.h>
+#include <SDL_mixer.h>
+#include <math.h>
+
+#include "aabb.h"
+//#include "filler-node.h"
+#include "macros.h"
+#include "whale.h"
+#include "stage.h"
+#include "svg-node.h"
+
+/* the opening intro */
+
+void whale_intro_event(whale_t *whale, SDL_Event *ev)
+{
+	switch (ev->type) {
+	case SDL_KEYDOWN:
+	case SDL_MOUSEBUTTONDOWN:
+		/* skip intro sequence */
+		whale_set_context(whale, WHALE_CONTEXT_GAME);
+		break;
+
+	default:
+		break;
+	}
+}
+
+typedef enum intro_fsm_t {
+	INTRO_FSM_BLACK,
+	INTRO_FSM_WHALE,
+	INTRO_FSM_ASTRO,
+	INTRO_FSM_CRATER,
+	INTRO_FSM_LEAVE,
+} intro_fsm_t;
+
+void whale_intro_update(whale_t *whale)
+{
+	static stage_node_t	*bobby, *astro, *crater;
+	static unsigned		initialized;
+	static intro_fsm_t	state;
+	Uint32			now = whale_ticks(whale, WHALE_TICKS_TIMER);
+	stage_t			*stage = whale_get_stage(whale);
+
+	if (!initialized) {
+		whale_set_music(whale, "assets/music.ogg", 0);
+		whale_ticks_reset(whale, WHALE_TICKS_MUSIC);	/* get ticks approximately aligned with music start */
+		whale_ticks_reset(whale, WHALE_TICKS_TIMER);	/* TODO: there should be a "reset all" or something */
+
+		bobby = svg_node_new_file(stage, "bobby", "assets/whale.svg", 2, (aabb_t){{-1.f, -.2f},{-.4f, .2f}});
+		fatal_if(!bobby, "Unable to load whale svg");
+
+		astro = svg_node_new_file(stage, "astro", "assets/astro.svg", 2, (aabb_t){{-.3f, -.2f},{.3f, .2f}});
+		fatal_if(!astro, "Unable to load astro svg");
+
+		crater = svg_node_new_file(stage, "crater", "assets/crater.svg", 3, (aabb_t){{.4f, -.2f},{1.f, .2f}});
+		fatal_if(!crater, "Unable to load crater svg");
+
+		stage_node_set_locked(stage, bobby);
+		stage_node_set_locked(stage, crater);
+
+		stage_node_set_active(stage, bobby);
+		stage_node_set_active(stage, astro);
+		stage_node_set_active(stage, crater);
+
+		now = whale_ticks(whale, WHALE_TICKS_TIMER);
+
+		initialized = 1;
+	}
+
+
+	switch (state) {
+	case INTRO_FSM_BLACK:
+		if (now > 500) /* brief delay for things to settle for the viewer */
+			state++;
+		break;
+
+	case INTRO_FSM_WHALE:
+		if (now < 2000) {
+			stage_node_set_alpha(stage, bobby, ((float)(now - 500)) * (1.0f / 1500.0f));
+		} else {
+			stage_node_set_alpha(stage, bobby, 1.0f);
+			state++;
+		}
+		break;
+
+	case INTRO_FSM_ASTRO:
+		if (now < 3500) {
+			stage_node_set_alpha(stage, astro, ((float)(now - 2000)) * (1.0f / 1500.0f));
+		} else {
+			stage_node_set_alpha(stage, astro, 1.0f);
+			state++;
+		}
+		break;
+
+	case INTRO_FSM_CRATER:
+		if (now < 5000) {
+			stage_node_set_alpha(stage, crater, ((float)(now - 3500)) * (1.0f / 1500.0f));
+		} else {
+			stage_node_set_alpha(stage, crater, 1.0f);
+			state++;
+		}
+		break;
+
+	case INTRO_FSM_LEAVE:
+		whale_set_context(whale, WHALE_CONTEXT_GAME);
+		break;
+
+	default:
+		assert(0);
+	}
+}