bgf updates, star field, signals. (#50)

* bgf v0.1.5, faster game restart (avoid scene reload).

* Show weapon and rounds on HUD.

* Use gradient texture for beam.

* Keep `GunBeam` busy until both fire and reload delay have elapsed.

* Add `StarField`.

* Use vertical color gradient for background.

* Remove invalid `sync()` call.

* Use `Layout` instead of `IDisplay`.

* WIP: bgf v0.1.6

* Add `Signal`, `GameSignals`. Use for HUD weapon icon changes.

* Use circles for powerups.

* Add game music.

Author: karnkaul

CMakeLists.txt

@@ -11,7 +11,9 @@ include(FetchContent)
 FetchContent_Declare(
   bgf
   GIT_REPOSITORY https://github.com/karnkaul/bgf
-  GIT_TAG v0.1.4
+
+  # GIT_TAG v0.1.5
+  GIT_TAG adc217f
   SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ext/bgf"
 )
 

assets/images/beam_round.png

@@ -27,8 +27,8 @@
         }
       },
       "angular": {
-        "lo": -90.000000,
-        "hi": 90.000000
+        "lo": -360.000000,
+        "hi": 360.000000
       }
     },
     "lerp": {
@@ -52,8 +52,8 @@
       "hi": 0.800000
     },
     "quad_size": [
-      100.000000,
-      100.000000
+      150.000000,
+      150.000000
     ],
     "count": 40,
     "respawn": true

assets/images/star_blue.png

@@ -6,7 +6,9 @@
     "milk": "#e5cdaeff",
     "ice": "#d6dbe1e1",
     "orange": "#f75c03ff",
-    "gun_beam": "#bc96e6ff"
+    "gun_beam": "#bc96e6ff",
+    "bg_top": "#10020eff",
+    "bg_bottom": "#040003ff"
   },
   "buttons": {
     "default": {

assets/images/star_red.png

@@ -1,12 +1,16 @@
 #include <spaced/game/arsenal.hpp>
+#include <spaced/services/game_signals.hpp>
 #include <spaced/services/stats.hpp>
 
 namespace spaced {
 using bave::Seconds;
 using bave::Services;
 using bave::Shader;
 
-Arsenal::Arsenal(Services const& services) : m_primary(services), m_stats(&services.get<Stats>()) {}
+Arsenal::Arsenal(Services const& services)
+	: m_stats(&services.get<Stats>()), m_weapon_changed_signal(&services.get<GameSignals>().weapon_changed), m_primary(services) {
+	m_weapon_changed_signal->dispatch(get_weapon());
+}
 
 auto Arsenal::get_weapon() const -> Weapon const& {
 	if (m_special) { return *m_special; }
@@ -34,13 +38,19 @@ void Arsenal::tick_weapons(Seconds const dt) {
 	if (m_special) {
 		m_special->tick(dt);
 		// if the special weapon has no more rounds and is idle, reset it.
-		if (m_special->get_rounds_remaining() == 0 && m_special->is_idle()) { m_special.reset(); }
+		if (m_special->get_rounds_remaining() == 0 && m_special->is_idle()) {
+			m_special.reset();
+			m_weapon_changed_signal->dispatch(get_weapon());
+		}
 	}
 }
 
 void Arsenal::check_switch_weapon() {
 	// if there is a next weapon on standby and the current weapon is idle, switch to the next weapon.
-	if (m_next && get_weapon().is_idle()) { m_special = std::move(m_next); }
+	if (m_next && get_weapon().is_idle()) {
+		m_special = std::move(m_next);
+		m_weapon_changed_signal->dispatch(get_weapon());
+	}
 }
 
 void Arsenal::fire_weapon(glm::vec2 const muzzle_position) {

assets/images/star_yellow.png

@@ -3,6 +3,7 @@
 
 namespace spaced {
 struct Stats;
+struct SigWeaponChanged;
 
 // Arsenal models a main/primary weapon, and an possible special weapon.
 // Weapons only switch when they are idle.
@@ -26,8 +27,10 @@ class Arsenal {
 	void fire_weapon(glm::vec2 muzzle_position);
 	void tick_rounds(IWeaponRound::State const& round_state, bave::Seconds dt);
 
-	GunKinetic m_primary; // main weapon
 	bave::NotNull<Stats*> m_stats;
+	bave::NotNull<SigWeaponChanged*> m_weapon_changed_signal;
+
+	GunKinetic m_primary;				 // main weapon
 	std::unique_ptr<Weapon> m_special{}; // special weapon
 	std::unique_ptr<Weapon> m_next{};	 // next special weapon (on standby until current weapon is idle)
 	std::vector<std::unique_ptr<Weapon::Round>> m_rounds{};