From ed3a6c7e1771100e81c53cc583828712d029b018 Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Wed, 13 Dec 2017 20:33:57 +0100
Subject: Add health bars.

---
 src/common.hpp     |  1 +
 src/game/game.hpp  |  2 +-
 src/game/units.cpp | 34 ++++++++++++++++++++++++++++++----
 src/render.cpp     |  8 ++++++++
 4 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/src/common.hpp b/src/common.hpp
index 4382da6..8a86482 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -287,6 +287,7 @@ namespace render {
 		void render(oriented_sprite_t *sprite, rectf_t bounds, float angle);
 
 		void render_text(v2f_t x, float height, const wchar_t *wstr, text_align_t align, sf::Color color);
+		void render_rect(rectf_t rect, sf::Color color);
 		void render_hlrect(rectf_t rect, sf::Color color);
 		void render_arrow(v2f_t x0, v2f_t x1, sf::Color color);
 
diff --git a/src/game/game.hpp b/src/game/game.hpp
index 0ad0614..f6687dc 100644
--- a/src/game/game.hpp
+++ b/src/game/game.hpp
@@ -86,7 +86,7 @@ namespace game {
 
 		bool dead = false;
 		double death_time = -INFINITY;
-		int health = 1;
+		int health = 1, max_health = 1;
 		void damage(double now, int points);
 		virtual void die(double now) = 0;
 
diff --git a/src/game/units.cpp b/src/game/units.cpp
index c416dd7..b4cb333 100644
--- a/src/game/units.cpp
+++ b/src/game/units.cpp
@@ -29,6 +29,32 @@ void unit_t::render_to(render::state_t *render)
 	if (selected == selection_cookie)
 		render->render_hlrect(render_bounds, sf::Color::Blue);
 
+	if (!dead && health < max_health)
+	{
+		rectf_t bar;
+		float frac;
+		sf::Color color;
+
+		bar[0][0] = (render_bounds[0][0] + render_bounds[1][0]) / 2;
+		bar[0][1] = render_bounds[0][1] - 0.05f;
+		bar[0][0] -= 0.3f;
+		bar[1][0] = bar[0][0] + 0.6f;
+		bar[1][1] = bar[0][1] + 0.05f;
+		render->render_rect(bar, sf::Color::Black);
+
+		frac = (float)health / max_health;
+
+		if (frac < 0.3f)
+			color = sf::Color::Red;
+		else if (frac < 0.75f)
+			color = sf::Color::Yellow;
+		else
+			color = sf::Color::Green;
+
+		bar[1][0] = lerp(bar[0][0], bar[1][0], frac);
+		render->render_rect(bar, color);
+	}
+
 	if (move.moving && debug_draw_paths)
 		render->debug_path(&move.path);
 }
@@ -151,7 +177,7 @@ void unit_t::damage(double now, int points)
 human_t::human_t() : unit_t(UNIT_HUMAN)
 {
 	cflags = CF_HUMAN;
-	health = 20;
+	health = max_health = 20;
 	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);
@@ -212,7 +238,7 @@ void human_t::render_to(render::state_t *render)
 alien_t::alien_t() : unit_t(UNIT_ALIEN)
 {
 	cflags = CF_SOLID;
-	health = 4;
+	health = max_health = 4;
 	size[0] = v2f_t(-0.2f, -0.2f);
 	size[1] = v2f_t(+0.2f, +0.2f);
 	render_size[0] = v2f_t(-0.3f, -0.3f);
@@ -281,9 +307,9 @@ void alien_t::attack(double now, unit_t *target, float range)
 
 	trace = world->trace(x, target->x, CF_SOLID);
 	if (!trace.hit)
-		target->damage(now, 12);
+		target->damage(now, rand() % 6 + rand() % 6 + 2);
 
-	next_attack = now + 1.0;
+	next_attack = now + 0.4;
 }
 
 void alien_t::think(double now, double dt)
diff --git a/src/render.cpp b/src/render.cpp
index 2c8f7a4..cddb6c9 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -216,6 +216,14 @@ void state_t::render_text(v2f_t x, float height, const wchar_t *wstr,
 	window->draw(text);
 }
 
+void state_t::render_rect(rectf_t rect, sf::Color color)
+{
+	wot_rect.setSize(rect.dims());
+	wot_rect.setPosition(rect[0]);
+	wot_rect.setFillColor(color);
+	window->draw(wot_rect);
+}
+
 void state_t::render_hlrect(rectf_t rect, sf::Color color)
 {
 	sf::Color fill;
-- 
cgit