From e4ca910e7731e2a12815a4a8de2582157f519898 Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Sat, 14 Oct 2017 15:54:01 +0200
Subject: Correct entity drawing order.

---
 src/game.cpp   | 47 +++++++++++++++++++++++++++--------------------
 src/render.cpp | 11 ++++++++++-
 2 files changed, 37 insertions(+), 21 deletions(-)

diff --git a/src/game.cpp b/src/game.cpp
index bb04ee7..58b56c6 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -26,6 +26,7 @@ class human_t : public unit_t {
 public:
 	float angle = 0.0f;
 	bool walking = false;
+	float stalin = 0.0f;
 
 	void render_to(render::state_t *render)
 	{
@@ -36,37 +37,43 @@ public:
 	}
 };
 
-static human_t *human;
+static std::list<human_t> humans;
 
 void state_t::start(void)
 {
-	human = new human_t;
-	human->bounds.left = 0.33f;
-	human->bounds.top = 0.0f;
-	human->bounds.width = 0.66f;
-	human->bounds.height = 1.0f;
-	human->link(&world);
 }
 
 void state_t::tick(void)
 {
-	static float stalin = 2.0f;
+	if (rand() % 5 == 0) {
+		humans.emplace(humans.end());
 
-	stalin -= ((float)rand() / RAND_MAX) * 0.1f;
+		human_t &human = *(--humans.end());
 
-	human->walking = false;
-
-	if (stalin < 0) {
-		human->walking = true;
-		human->angle += (rand() & 2 ? 0.2f : -0.2f);
-		human->unlink();
-		human->bounds.left += cos(human->angle) * 0.04;
-		human->bounds.top += sin(human->angle) * 0.04;
-		human->link(&world);
+		human.bounds.left = 0.33f;
+		human.bounds.top = 0;
+		human.bounds.width = 0.66f;
+		human.bounds.height = 1.0f;
+		human.link(&world);
 	}
 
-	if (stalin < -4.0f)
-		stalin = 2.0f;
+	for (human_t &human : humans) {
+		human.stalin -= ((float)rand() / RAND_MAX) * 0.1f;
+
+		human.walking = false;
+
+		if (human.stalin < 0) {
+			human.walking = true;
+			human.angle += (rand() & 2 ? 0.2f : -0.2f);
+			human.unlink();
+			human.bounds.left += cos(human.angle) * 0.04;
+			human.bounds.top += sin(human.angle) * 0.04;
+			human.link(&world);
+		}
+
+		if (human.stalin < -4.0f)
+			human.stalin = 2.0f;
+	}
 }
 
 } //namespace game
diff --git a/src/render.cpp b/src/render.cpp
index f56cb37..ce9b837 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -79,6 +79,7 @@ void state_t::render(game::state_t *game)
 	sf::Vector2u size = window->getSize();
 	sf::Vector2f A, B, C, D;
 	sf::Rect<float> bbox;
+	std::list<world::entity_t*> ents;
 
 	A = window->mapPixelToCoords(sf::Vector2i(0, 0));
 	B = window->mapPixelToCoords(sf::Vector2i(size.x, 0));
@@ -93,7 +94,15 @@ void state_t::render(game::state_t *game)
 	for (world::sector_t *sector : game->world.get_sectors(bbox))
 		draw_sector(window, sector);
 
-	for (world::entity_t *ent : game->world.get_entities(bbox))
+	ents = game->world.get_entities(bbox);
+	ents.sort(
+		[](const world::entity_t *x, const world::entity_t *y) -> bool
+		{ 
+			return x->bounds.top + x->bounds.height
+			       < y->bounds.top + y->bounds.height;
+		});
+
+	for (world::entity_t *ent : ents)
 		ent->render_to(this);
 }
 
-- 
cgit