Explosions, better AI and misc refactoring.

11 files changed, 173 insertions, 43 deletions

diff --git a/src/common.hpp b/src/common.hpp
index e6879ca..f4ce9ff 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -44,6 +44,7 @@ extern bool debug_AI;
 typedef uint64_t ntime_t;
 ntime_t nclock(void);
 
+#define SEC(x) ((ntime_t)x * 1000000000)
 #define MSEC(x) ((ntime_t)x * 1000000)
 
 class freq_counter_t {
@@ -306,6 +307,8 @@ namespace game {
 		procgen::prng_t prng;
 		std::unordered_set<entity_t*> awake_entities;
 		std::unordered_set<unit_t*> selected_units;
+		// Some deletes have to be deferred to the next frame.
+		std::unordered_set<entity_t*> deletion_list;
 
 		ntime_t time = 0; // game time
 		double now, dt; // FIXME: refactor the code, use ntime_t everywhere
@@ -322,6 +325,8 @@ namespace game {
 		void pause(void);
 		void resume(void);
 
+		void explosion(v2f_t x);
+
 		// These are called by the interface.
 		void select(rectf_t rect, int type);
 		bool populate_pie_menu(std::vector<interface::pie_item_t> &items);
diff --git a/src/game/assets.cpp b/src/game/assets.cpp
index 553cafd..2009672 100644
--- a/src/game/assets.cpp
+++ b/src/game/assets.cpp
@@ -67,6 +67,10 @@ void load(void)
 	fx.blood.load("assets/units/blood_", 4);
 	fx.flash.load("assets/units/flash_", 1);
 
+	fx.explosion.load("assets/fx/explosion_", 7);
+	fx.explosion_sound.load("assets/fx/explosion.ogg");
+	fx.explosion_sound.volume = 3.0f;
+
 	deco.stone.load("assets/deco/stone_", 1);
 	deco.eyething.load("assets/deco/eyething_", 2);
 	deco.spike.load("assets/deco/spike_", 1);
diff --git a/src/game/effects.cpp b/src/game/effects.cpp
index a398527..6f92f17 100644
--- a/src/game/effects.cpp
+++ b/src/game/effects.cpp
@@ -26,7 +26,7 @@ effect_t::effect_t(state_t *game_) : game::entity_t(game_, ET_EFFECT)
 void effect_t::on_think(void)
 {
 	if (game->now >= ttl)
-		destroy();
+		delete this;
 }
 
 fx_tracer_t::fx_tracer_t(state_t *game_, v2f_t x0_, v2f_t x1_) : effect_t(game_)
@@ -39,6 +39,7 @@ fx_tracer_t::fx_tracer_t(state_t *game_, v2f_t x0_, v2f_t x1_) : effect_t(game_)
 	render_bounds[0] = x0;
 	render_bounds[1] = x1;
 	render_bounds = render_bounds.norm();
+	render_layer = render::LAYER_TOP;
 	cmodel.bounds = render_bounds;
 	cmodel.cflags = 0;
 
@@ -72,6 +73,7 @@ fx_flash_t::fx_flash_t(state_t *game_, v2f_t x_, float radius_) : effect_t(game_
 	render_bounds[0] = x - v2f_t(radius, radius);
 	render_bounds[1] = x + v2f_t(radius, radius);
 	render_bounds = render_bounds.norm();
+	render_layer = render::LAYER_TOP;
 	cmodel.bounds = render_bounds;
 	cmodel.cflags = 0;
 
@@ -127,12 +129,6 @@ fx_move_marker_t::fx_move_marker_t(state_t *game_, v2f_t x_) : effect_t(game_)
 	link(&game->world);
 }
 
-fx_move_marker_t::~fx_move_marker_t(void)
-{
-	unlink();
-	sleep();
-}
-
 void fx_move_marker_t::render_to(render::state_t *render)
 {
 	render->render(game->now * 2, &assets::move_marker, render_bounds, sf::Color::White);
@@ -151,15 +147,33 @@ fx_aim_marker_t::fx_aim_marker_t(state_t *game_, v2f_t x_) : effect_t(game_)
 	link(&game->world);
 }
 
-fx_aim_marker_t::~fx_aim_marker_t(void)
+void fx_aim_marker_t::render_to(render::state_t *render)
 {
-	unlink();
-	sleep();
+	render->render(game->now * 2, &assets::aim_marker, render_bounds, sf::Color::White);
 }
 
-void fx_aim_marker_t::render_to(render::state_t *render)
+fx_explosion_t::fx_explosion_t(state_t *game_, v2f_t x_) : effect_t(game_)
 {
-	render->render(game->now * 2, &assets::aim_marker, render_bounds, sf::Color::White);
+	ttl = game->now + 1.3;
+
+	x = x_;
+
+	render_bounds[0] = x + v2f_t(-1.0, -2.5);
+	render_bounds[1] = x + v2f_t(1.0, 0.5);
+	render_bounds = render_bounds.norm();
+	cmodel.bounds = render_bounds;
+	cmodel.cflags = 0;
+
+	ignore_waking = true;
+	wake();
+
+	assets::fx.explosion_sound.play_3d(x);
+}
+
+void fx_explosion_t::render_to(render::state_t *render)
+{
+	double phase = (game->now - ttl) / 1.3f;
+	render->render(phase, &assets::fx.explosion, render_bounds, sf::Color::White);
 }
 
 } // namespace game
diff --git a/src/game/game.cpp b/src/game/game.cpp
index 66bf237..6e8ea78 100644
--- a/src/game/game.cpp
+++ b/src/game/game.cpp
@@ -19,6 +19,12 @@ along with Minitrem.  If not, see <http://www.gnu.org/licenses/>.
 
 namespace game {
 
+bool load_assets(void)
+{
+	assets::load();
+	return true;
+}
+
 size_t selection_cookie = 1;
 
 entity_t::entity_t(game::state_t *game_, int type_) : world::entity_t(type_)
@@ -28,13 +34,8 @@ entity_t::entity_t(game::state_t *game_, int type_) : world::entity_t(type_)
 
 entity_t::~entity_t(void)
 {
-}
-
-void entity_t::destroy(void)
-{
+	sleep();
 	unlink();
-	game->awake_entities.erase(this);
-	delete this;
 }
 
 void entity_t::place(world::world_t *world_)
@@ -48,9 +49,6 @@ void entity_t::place(world::world_t *world_)
 
 	if (do_spawn)
 		on_spawn();
-
-	if (!ignore_waking)
-		wake();
 }
 
 void entity_t::place(world::world_t *world, v2f_t x_)
@@ -168,7 +166,7 @@ enum {
 	COMMAND_FIRE,
 	COMMAND_STOP,
 
-	COMMAND_REPL
+	COMMAND_REPL,
 };
 
 bool state_t::populate_pie_menu(std::vector<interface::pie_item_t> &items)
@@ -303,11 +301,16 @@ void state_t::tick(ntime_t time_)
 		now = time * 1.0e-9;
 		dt = TIME_DELTA * 1.0e-9;
 
+		for (entity_t *ent : deletion_list)
+			delete ent;
+		deletion_list.clear();
+
 		// on_think can insert/erase elements of awake_entities so iterate
 		// over a copy of it.
 		auto copy = awake_entities;
 		for (entity_t *ent : copy)
-			ent->on_think();
+			if (awake_entities.find(ent) != awake_entities.end())
+				ent->on_think();
 
 		frames++;
 		frames_since_t0++;
@@ -384,10 +387,39 @@ void state_t::compute_ambience(render::state_t *render)
 	}
 }
 
-bool load_assets(void)
+void state_t::explosion(v2f_t x)
 {
-	assets::load();
-	return true;
+	fx_explosion_t *explosion;
+
+	explosion = new fx_explosion_t(this, x);
+	explosion->place(&world);
+
+	for (size_t i = 0; i < 30; i++) {
+		v2f_t end;
+		world::trace_t trace;
+		unit_t *unit;
+		int damage;
+
+		end = x + prng.unit_vec2() * 6.0f;
+		trace = world.ray_v_all(x, end, CF_SOLID|CF_BODY|CF_BODY_SMALL, NULL);
+		if (!trace.hit)
+			continue;
+
+		if (!trace.ent)
+			continue;
+
+		if (trace.ent->type != ET_UNIT)
+			continue;
+
+		unit = dynamic_cast<unit_t*>(trace.ent);
+
+		if (unit->dead)
+			continue;
+
+		damage = pow(1 - trace.frac, 2.0f) * 40.0f;
+		printf("frac=%f, damage=%i\n", trace.frac, damage);
+		unit->damage(damage, nullptr);
+	}
 }
 
 } //namespace game
diff --git a/src/game/game.hpp b/src/game/game.hpp
index 4773f9c..6c71736 100644
--- a/src/game/game.hpp
+++ b/src/game/game.hpp
@@ -80,7 +80,8 @@ namespace game {
 		} repl_assets_t;
 
 		typedef struct {
-			render::animated_texture_t blood, flash;
+			render::animated_texture_t blood, flash, explosion;
+			audio::sound_t explosion_sound;
 		} fx_assets_t;
 
 		typedef struct {
@@ -138,7 +139,6 @@ namespace game {
 
 		entity_t(game::state_t *game, int type_);
 		virtual ~entity_t(void) = 0;
-		void destroy(void);
 
 		void place(world::world_t *world);
 		void place(world::world_t *world, v2f_t x_);
@@ -158,6 +158,7 @@ namespace game {
 	class fx_aim_marker_t;
 
 	unit_t *find_target(world::world_t *world, v2f_t x, float r, bool friendly);
+	void hivemind_attack(unit_t *source, v2f_t target);
 
 	class unit_t : public entity_t {
 	protected:
@@ -212,7 +213,11 @@ namespace game {
 		void damage(int points, unit_t *attacker);
 		void try_attack(unit_t *target);
 		void die(unit_t *killer);
-		virtual void on_death() = 0;
+
+		virtual void on_damage(unit_t *attacker) = 0;
+		virtual void on_death(void) = 0;
+
+		bool have_target = false;
 
 		std::string say_text;
 		double say_time = -INFINITY;
@@ -247,6 +252,7 @@ namespace game {
 		void on_think(void);
 		void on_spawn(void) {}; 
 		void on_wake(void) {};
+		void on_damage(unit_t *attacker) {};
 		void on_death(void);
 	};
 
@@ -261,7 +267,8 @@ namespace game {
 
 		void on_think(void);
 		void on_spawn(void) {};
-		void on_wake(void);
+		void on_wake(void) {};
+		void on_damage(unit_t *attacker);
 		void on_death(void);
 	};
 
@@ -276,8 +283,9 @@ namespace game {
 
 		void on_think(void);
 		void on_spawn(void);
-		void on_death(void);
 		void on_wake(void) {};
+		void on_damage(unit_t *attacker) {};
+		void on_death(void);
 	};
 
 	class unit_repl_t : public unit_t {
@@ -289,8 +297,10 @@ namespace game {
 
 		void on_think(void);
 		void on_spawn(void);
-		void on_death(void);
 		void on_wake(void) {};
+		void on_damage(unit_t *attacker) {};
+		void on_death(void);
+
 		void activate(void);
 	};
 
@@ -345,7 +355,7 @@ namespace game {
 
 	public:
 		fx_move_marker_t(game::state_t *game_, v2f_t x_);
-		~fx_move_marker_t(void);
+		~fx_move_marker_t(void) {};
 
 		void render_to(render::state_t *render);
 	};
@@ -355,7 +365,17 @@ namespace game {
 
 	public:
 		fx_aim_marker_t(game::state_t *game_, v2f_t x_);
-		~fx_aim_marker_t(void);
+		~fx_aim_marker_t(void) {};
+
+		void render_to(render::state_t *render);
+	};
+
+	class fx_explosion_t : public effect_t {
+		v2f_t x;
+
+	public:
+		fx_explosion_t(game::state_t *game_, v2f_t x_);
+		~fx_explosion_t(void) {};
 
 		void render_to(render::state_t *render);
 	};
diff --git a/src/game/interface.cpp b/src/game/interface.cpp
index d249f38..c366fa8 100644
--- a/src/game/interface.cpp
+++ b/src/game/interface.cpp
@@ -129,7 +129,7 @@ void state_t::tick(double dt)
 	sf::Event event;
 
 	v2f_t view_size;
-	v2f_t follow_center(0, 0), view_center, pan_delta;
+	v2f_t follow_center(0, 0), view_center, pan_delta = v2f_t(0, 0);
 	float view_scale;
 	sf::Vector2i mouse;
 	v2f_t wmouse; // Mouse position in world space;
@@ -139,8 +139,8 @@ void state_t::tick(double dt)
 	expfade<float>(&camera.zoom_s, camera.zoom, 15, dt);
 	view_scale = 4.5 * exp(camera.zoom_s * 0.12);
 	if (window_size[0] < window_size[1]) {
-		view_size[1] = view_scale;
 		view_size[0] = view_scale * window_size[0] / window_size[1];
+		view_size[1] = view_scale;
 	} else {
 		view_size[0] = view_scale;
 		view_size[1] = view_scale * window_size[1] / window_size[0];
diff --git a/src/game/unit_nest.cpp b/src/game/unit_nest.cpp
index 163a585..cae98f5 100644
--- a/src/game/unit_nest.cpp
+++ b/src/game/unit_nest.cpp
@@ -26,6 +26,7 @@ unit_nest_t::unit_nest_t(game::state_t *game_) : unit_t(game_, UNIT_NEST)
 	size[1] = {+0.6f, +0.2f};
 	render_size[0] = {-0.6f, -0.6f};
 	render_size[1] = {+0.6f, +0.6f};
+	render_layer = render::LAYER_NORMAL;
 	cmodel.cflags = CF_BODY;
 
 	name = text::get(text::UNIT_NAME_NEST);
diff --git a/src/game/unit_repl.cpp b/src/game/unit_repl.cpp
index 8bfd835..e11d204 100644
--- a/src/game/unit_repl.cpp
+++ b/src/game/unit_repl.cpp
@@ -45,6 +45,8 @@ void unit_repl_t::on_spawn(void)
 
 void unit_repl_t::on_death(void)
 {
+	game->explosion(x);
+	delete this;
 }
 
 void unit_repl_t::render_to(render::state_t *render)
diff --git a/src/game/unit_spider.cpp b/src/game/unit_spider.cpp
index 9ff8fc1..df9073c 100644
--- a/src/game/unit_spider.cpp
+++ b/src/game/unit_spider.cpp
@@ -33,6 +33,8 @@ unit_spider_t::unit_spider_t(game::state_t *game) : unit_t(game, UNIT_SPIDER)
 	ignore_waking = false;
 
 	health = max_health = 4;
+
+	sleep();
 }
 
 void unit_spider_t::target_and_attack(void)
@@ -45,12 +47,12 @@ void unit_spider_t::target_and_attack(void)
 
 	target = find_target(world, x, 10.0f, true);
 	if (!target) {
-		if (health < max_health)
-			random_walk();
-
+		have_target = false;
 		return;
 	}
 
+	have_target = true;
+	wake_time = game->time;
 	start_moving(target->x);
 	next_targetting = game->now + game->prng.next_float(0.2f, 0.4f);
 
@@ -72,18 +74,31 @@ void unit_spider_t::on_think(void)
 {
 	target_and_attack();
 
-	keep_moving(4.0);
+	if (have_target || game->now - wake_time < 10.0) {
+		if (!have_target && !move.moving)
+			random_walk();
 
-	if (!move.moving && wake_time + 5 < game->now)
+		keep_moving(4.0);
+	} else
 		sleep();
 }
 
-void unit_spider_t::on_wake(void)
+void unit_spider_t::on_damage(unit_t *attacker)
 {
+	if (!attacker)
+		return;
+
+	hivemind_attack(this, attacker->x);
 }
 
 void unit_spider_t::on_death(void)
 {
+	if (health < -5) {
+		assets::soldier.gib_sound.play_3d(x);
+		game->deletion_list.insert(this);
+		return;
+	}
+
 	render_layer = render::LAYER_FLAT;
 	cmodel.cflags = CF_BACKGROUND;
 }
diff --git a/src/game/units.cpp b/src/game/units.cpp
index fb0ce3c..6bce474 100644
--- a/src/game/units.cpp
+++ b/src/game/units.cpp
@@ -209,8 +209,10 @@ void unit_t::damage(int points, unit_t *attacker)
 	health -= points;
 	if (health <= 0)
 		die(attacker);
-	else
+	else {
 		wake();
+		on_damage(attacker);
+	}
 }
 
 void unit_t::die(unit_t *killer)
@@ -273,4 +275,36 @@ void unit_t::random_walk(void)
 	move.random_walk_time = game->time;
 }
 
+void hivemind_attack(unit_t *source, v2f_t target)
+{
+	rectf_t search;
+	std::list<world::entity_t*> ents;
+
+	search[0] = source->x - v2f_t(5, 5);
+	search[1] = source->x + v2f_t(5, 5);
+
+	ents = source->game->world.get_entities(search, CF_BODY_SMALL);
+
+	for (world::entity_t *ent : ents) {
+		unit_t *unit;
+
+		if (ent->type != ET_UNIT)
+			continue;
+
+		unit = dynamic_cast<unit_t*>(ent);
+
+		if (unit->type != unit_t::UNIT_SPIDER)
+			continue;
+
+		if ((unit->x - target).len() > 25.0f)
+			continue;
+
+		if (unit->have_target)
+			continue;
+
+		unit->wake();
+		unit->start_moving(target);
+	}
+}
+
 } // namespace game
diff --git a/src/render.cpp b/src/render.cpp
index 98c12a2..185e5e6 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -390,6 +390,9 @@ void state_t::render_text(v2f_t x, float height, std::string str,
 		offset[0] = -rect.width;
 		offset[1] = -rect.height;
 		break;
+
+	default:
+		abort();
 	}
 
 	offset *= scale;