Start moving game logic to src/game.

1 files changed, 270 insertions, 0 deletions

diff --git a/src/game/game.cpp b/src/game/game.cpp
new file mode 100644
index 0000000..eb3966d
--- /dev/null
+++ b/src/game/game.cpp
@@ -0,0 +1,270 @@
+#include "game.hpp"
+
+namespace game {
+
+static size_t selection_cookie = 1;
+
+enum {
+	ET_UNIT
+};
+
+class unit_t : public world::entity_t {
+protected:
+	world::world_t *world;
+
+	world::cmodel_t make_cmodel(v2f_t at)
+	{
+		world::cmodel_t cmodel;
+
+		cmodel.bounds[0] = at + size[0];
+		cmodel.bounds[1] = at + size[1];
+		cmodel.cflags = cflags;
+
+		return cmodel;
+	}
+
+	void compute_bounds()
+	{
+		render_bounds[0] = x + render_size[0];
+		render_bounds[1] = x + render_size[1];
+	}
+
+public:
+	v2f_t x;
+	rectf_t size, render_size;
+	world::cflags_t cflags;
+	size_t selected = 0;
+
+	unit_t() : entity_t(ET_UNIT)
+	{
+	}
+
+	struct {
+		bool moving = false;
+		v2f_t dst;
+		float angle = 0.0f;
+
+		std::list<v2f_t> path;
+
+		bool blocked;
+		size_t attempts_left;
+		float next_attempt;
+	} move;
+
+	const wchar_t *say_text;
+	double say_time = -INFINITY;
+
+	void say(const wchar_t *wstr, double now)
+	{
+		say_text = wstr;
+		say_time = now;
+		std::cout << (void*)this << ": " << wstr << "\n";
+	}
+
+	void place(world::world_t *world_, v2f_t x_)
+	{
+		world = world_;
+		x = x_;
+		move.moving = false;
+		cflags = 1;
+
+		unlink();
+		cmodel = make_cmodel(x);
+		compute_bounds();
+		link(world);
+	}
+
+	void keep_moving(double now, double dt)
+	{
+		float time;
+
+		if (!move.moving)
+			return;
+
+		if (move.blocked && now < move.next_attempt)
+			return;
+
+		time = dt * 10;
+
+		while (time > 0.0f) {
+			v2f_t delta, next, x_new;
+			world::cmodel_t cmodel_next;
+
+			if (!move.path.size()) {
+				move.moving = false;
+				break;
+			}
+
+			next = *move.path.begin();
+			delta = next - x;
+			move.angle = delta.angle();
+
+			if (delta.len() >= time) {
+				x_new = x + delta * time / delta.len();
+				time -= delta.len();
+			} else {
+				x_new = next;
+				time -= delta.len();
+				move.path.pop_front();
+			}
+
+			cmodel_next = make_cmodel(x_new);
+			if (!world->test_rect(&cmodel_next, this)) {
+				x = x_new;
+				cmodel = cmodel_next;
+				continue;
+			}
+
+			if (move.attempts_left) {
+				move.blocked = true;
+				move.attempts_left--;
+				move.next_attempt = now + 0.2f;
+			} else {
+				if ((x - move.dst).len() > 1.5f)
+					say(text::unit_blocked, now);
+				move.moving = false;
+			}
+			break;
+		}
+
+
+		unlink();
+		compute_bounds();
+		link(world);
+	}
+
+	bool start_moving(v2f_t dst_, double now)
+	{
+		if (!world) {
+			printf("unit_t::start_moving: entity is not linked\n");
+			return false;
+		}
+
+		move.dst = dst_;
+		move.path.clear();
+
+		if (!world->find_path(x, move.dst, &cmodel, this, &move.path)) {
+			say(text::unit_no_path, now);
+			move.moving = false;
+			return false;
+		}
+
+		move.moving = true;
+
+		move.blocked = false;
+		move.attempts_left = 10;
+		move.next_attempt = -INFINITY;
+
+		return true;
+	}
+};
+
+class human_t : public unit_t {
+public:
+	human_t()
+	{
+		size[0] = v2f_t(-0.4f, -0.4f);
+		size[1] = v2f_t(+0.4f, +0.4f);
+		render_size[0] = v2f_t(-0.5f, -1.0f);
+		render_size[1] = v2f_t(+0.5f, +0.5f);
+	}
+
+	void render_to(render::state_t *render)
+	{
+		bool moving;
+
+		if (selected == selection_cookie)
+			render->render_hlrect(render_bounds, sf::Color::Blue);
+
+		moving = move.moving && !move.blocked;
+
+		render->render((moving ? &assets::human.legs_walking :
+		               &assets::human.legs_idle), render_bounds, move.angle);
+		render->render(&assets::human.body_idle, render_bounds, move.angle);
+		render->render(&assets::human.head_idle, render_bounds, move.angle);
+
+		{
+			v2f_t x1;
+			static float t = 0;
+			world::trace_t trace;
+
+			t += 0.02f;
+
+			x1[0] = x[0] + cos(t) * 5;
+			x1[1] = x[1] + sin(t) * 5;
+			trace = world->trace(x, x1, 1);
+			render->render_arrow(x, trace.end, sf::Color::Green);
+		}
+
+		if (move.moving && debug_draw_paths)
+			render->debug_path(&move.path);
+
+		if (say_time + 5.0 > render->now) {
+			v2f_t text_pos;
+			float height;
+
+			text_pos = render_bounds[0] + v2f_t(render_bounds.dim(0) / 2, -render_bounds.dim(1) * 0.1);
+			height = size.dim_min() * 0.20f;
+			render->render_text(text_pos, height, say_text,
+			                    render::ALIGN_CENTER_BOTTOM,
+			                    sf::Color::White);
+		}
+	}
+};
+
+void state_t::start(void)
+{
+	human_t *human;
+
+	human = new human_t;
+	human->place(&world, v2f_t(0.5, 0.5));
+	units.insert(human);
+}
+
+void state_t::stop(void)
+{
+	// FIXME
+	/*
+	for (unit_t *unit : units)
+		delete unit;
+	*/
+}
+
+void state_t::select(rectf_t x)
+{
+	selection_cookie++;
+	selected_units.clear();
+
+	for (world::entity_t *ent : world.get_render_entities(x)) {
+		unit_t *unit;
+
+		if (ent->type != ET_UNIT)
+			continue;
+
+		unit = (unit_t*)ent;
+		unit->selected = selection_cookie;
+		selected_units.insert(unit);
+	}
+}
+
+void state_t::command(v2f_t x)
+{
+	v2f_t snap;
+
+	snap[0] = std::round(x[0] - 0.5f) + 0.5f;
+	snap[1] = std::round(x[1] - 0.5f) + 0.5f;
+
+	for (unit_t *unit : selected_units)
+		unit->start_moving(snap, now);
+}
+
+void state_t::tick(double now_, double dt_)
+{
+	now = now_;
+	dt = dt_;
+
+	for (unit_t *unit : units)
+		unit->keep_moving(now, dt);
+}
+
+} //namespace game