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{};

assets/music/game.mp3

@@ -9,20 +9,19 @@ using bave::Action;
 using bave::EnumArray;
 using bave::GamepadAxis;
 using bave::GamepadButton;
-using bave::IDisplay;
 using bave::im_text;
 using bave::PointerMove;
 using bave::PointerTap;
 using bave::Seconds;
 using bave::Services;
 
-PlayerController::PlayerController(Services const& services) : m_display(&services.get<IDisplay>()), m_gamepad_provider(&services.get<IGamepadProvider>()) {
-	max_y = 0.5f * m_display->get_world_space().y;
+PlayerController::PlayerController(Services const& services) : m_layout(&services.get<Layout>()), m_gamepad_provider(&services.get<IGamepadProvider>()) {
+	max_y = 0.5f * m_layout->world_space.y;
 	min_y = -max_y; // NOLINT(cppcoreguidelines-prefer-member-initializer)
 }
 
 void PlayerController::on_move(PointerMove const& pointer_move) {
-	auto const world_pos = m_display->project_to_world(pointer_move.pointer.position);
+	auto const world_pos = m_layout->project(pointer_move.pointer.position);
 
 	if (m_type == Type::eTouch) {
 		if (!is_in_move_area(world_pos)) {
@@ -41,7 +40,7 @@ void PlayerController::on_move(PointerMove const& pointer_move) {
 }
 
 void PlayerController::on_tap(PointerTap const& pointer_tap) {
-	auto const world_pos = m_display->project_to_world(pointer_tap.pointer.position);
+	auto const world_pos = m_layout->project(pointer_tap.pointer.position);
 	if (m_type == Type::eTouch && is_in_move_area(world_pos)) {
 		// pointer tap in move area is ingored
 		return;
@@ -68,7 +67,7 @@ void PlayerController::stop_firing() {
 }
 
 auto PlayerController::is_in_move_area(glm::vec2 const position) const -> bool {
-	auto const width = m_display->get_world_space().x;
+	auto const width = m_layout->world_space.x;
 	auto const n_pos = (position.x + 0.5f * width) / width;
 	return n_pos <= n_move_area;
 }

assets/particles/explode.json

@@ -1,11 +1,11 @@
 #pragma once
 #include <bave/core/ptr.hpp>
 #include <bave/input/gamepad.hpp>
-#include <bave/services/display.hpp>
 #include <bave/services/services.hpp>
 #include <spaced/game/controllers/follow_controller.hpp>
 #include <spaced/game/spring_arm.hpp>
 #include <spaced/services/gamepad_provider.hpp>
+#include <spaced/services/layout.hpp>
 
 namespace spaced {
 class PlayerController : public FollowController {
@@ -45,8 +45,8 @@ class PlayerController : public FollowController {
 	auto tick_y(bave::Seconds dt) -> float final;
 	void do_inspect() final;
 
-	bave::Ptr<bave::IDisplay const> m_display{};
-	bave::Ptr<IGamepadProvider const> m_gamepad_provider{};
+	bave::NotNull<Layout const*> m_layout;
+	bave::NotNull<IGamepadProvider const*> m_gamepad_provider;
 
 	Type m_type{};
 	float m_y{};

assets/styles.json

@@ -3,56 +3,54 @@
 #include <bave/services/styles.hpp>
 #include <bave/ui/button.hpp>
 #include <spaced/game/hud.hpp>
+#include <spaced/services/game_signals.hpp>
 #include <spaced/services/layout.hpp>
 
 namespace spaced {
-using bave::IDisplay;
+using bave::Display;
 using bave::Resources;
 using bave::Seconds;
 using bave::Services;
-using bave::Shader;
 using bave::Styles;
+using bave::Text;
 using bave::TextHeight;
 using bave::Texture;
 
 namespace ui = bave::ui;
 
-Hud::Hud(Services const& services)
-	: ui::View(services), m_display(&services.get<IDisplay>()), m_layout(&services.get<Layout>()), m_styles(&services.get<Styles>()) {
+Hud::Hud(Services const& services) : ui::View(services), m_layout(&services.get<Layout>()), m_styles(&services.get<Styles>()) {
 	create_background();
 	create_score(services);
-	create_lives_icon(services);
+	create_lives(services);
+	create_weapon(services);
 
 	block_input_events = false;
-	render_view = m_display->get_world_view();
-}
-
-void Hud::set_lives(int const lives) {
-	if (lives <= 0) {
-		m_lives_icon.instances.clear();
-		return;
-	}
+	render_view = services.get<Display>().world.render_view;
 
-	m_lives_icon.instances.resize(static_cast<std::size_t>(lives));
-	auto x_offset = 0.0f;
-	for (auto& instance : m_lives_icon.instances) {
-		instance.transform.position.x += x_offset;
-		x_offset += 2.0f * m_lives_icon.get_shape().size.x;
-	}
+	m_on_weapon_changed = services.get<GameSignals>().weapon_changed.connect([this](Weapon const& weapon) { set_weapon(weapon.get_icon()); });
 }
 
-void Hud::on_death() {
-	if (m_lives_icon.instances.empty()) { return; }
-	m_lives_icon.instances.pop_back();
+void Hud::set_lives(int lives) {
+	lives = std::clamp(lives, 0, 99); // TODO: max_lives
+	m_lives_count->text.set_string(fmt::format("x{}", lives));
 }
 
 void Hud::set_score(std::int64_t const score) { m_score->text.set_string(fmt::format("{}", score)); }
 
 void Hud::set_hi_score(std::int64_t const score) { m_hi_score->text.set_string(fmt::format("HI {}", score)); }
 
-void Hud::render(Shader& shader) const {
-	View::render(shader);
-	m_lives_icon.draw(shader);
+void Hud::set_weapon(std::shared_ptr<Texture const> texture) {
+	if (texture) { m_weapon_icon->sprite.set_size(texture->get_size()); }
+	m_weapon_icon->sprite.set_texture(std::move(texture));
+}
+
+auto Hud::make_text(Services const& services) const -> std::unique_ptr<ui::Text> {
+	auto const& rgbas = m_styles->rgbas;
+	auto text = std::make_unique<ui::Text>(services);
+	text->text.set_height(TextHeight{60});
+	text->text.transform.position = m_layout->hud_area.centre();
+	text->text.tint = rgbas["grey"];
+	return text;
 }
 
 void Hud::create_background() {
@@ -66,45 +64,54 @@ void Hud::create_background() {
 }
 
 void Hud::create_score(Services const& services) {
-	auto const& rgbas = m_styles->rgbas;
-
-	auto make_text = [&] {
-		auto text = std::make_unique<ui::Text>(services);
-		text->text.set_height(TextHeight{60});
-		text->text.transform.position = m_layout->hud_area.centre();
-		text->text.tint = rgbas["grey"];
-		return text;
-	};
-
-	auto text = make_text();
+	auto text = make_text(services);
 	m_score = text.get();
 	text->text.set_string("9999999999");
 	m_text_bounds_size = text->text.get_bounds().size();
 	text->text.transform.position.y -= 0.5f * m_text_bounds_size.y;
 	set_score(0);
-
 	push(std::move(text));
 
-	text = make_text();
+	text = make_text(services);
 	m_hi_score = text.get();
 	text->text.transform.position.x = m_layout->hud_area.rb.x - 50.0f;
 	text->text.transform.position.y -= 0.5f * m_text_bounds_size.y;
-	text->text.set_align(bave::Text::Align::eLeft);
+	text->text.set_align(Text::Align::eLeft);
 	set_hi_score(0);
-
 	push(std::move(text));
 }
 
-void Hud::create_lives_icon(Services const& services) {
-	auto quad = m_lives_icon.get_shape();
-	quad.size = glm::vec2{20.0f};
+void Hud::create_lives(Services const& services) {
+	auto sprite = std::make_unique<ui::Sprite>();
+	m_lives_icon = sprite.get();
+	m_lives_icon->sprite.set_size(glm::vec2{20.0f});
 	auto const& resources = services.get<Resources>();
 	if (auto const texture = resources.get<Texture>("images/player_ship_icon.png")) {
-		quad.size = texture->get_size();
-		m_lives_icon.set_texture(texture);
+		m_lives_icon->sprite.set_texture(texture);
+		m_lives_icon->sprite.set_size(texture->get_size());
 	}
-	m_lives_icon.set_shape(quad);
-	m_lives_icon.transform.position = m_layout->hud_area.centre();
-	m_lives_icon.transform.position.x = m_layout->hud_area.lt.x + 100.0f;
+	auto position = m_layout->hud_area.centre();
+	position.x = m_layout->hud_area.lt.x + 100.0f;
+	m_lives_icon->set_position(position);
+	push(std::move(sprite));
+
+	auto text = make_text(services);
+	text->text.transform.position.y -= 0.5f * m_text_bounds_size.y;
+	text->text.transform.position.x = m_lives_icon->get_position().x + m_lives_icon->get_size().x;
+	text->text.set_align(Text::Align::eRight);
+	text->text.set_string("0");
+	m_lives_count = text.get();
+	push(std::move(text));
+}
+
+void Hud::create_weapon(Services const& /*services*/) {
+	auto sprite = std::make_unique<ui::Sprite>();
+	m_weapon_icon = sprite.get();
+	sprite->sprite.set_size(glm::vec2{50.0f});
+	auto position = m_lives_icon->get_position();
+	position.y -= 5.0f;
+	position.x = m_lives_count->get_position().x + 200.0f;
+	sprite->set_position(position);
+	push(std::move(sprite));
 }
 } // namespace spaced

src/spaced/spaced/game/arsenal.cpp

@@ -1,9 +1,10 @@
 #pragma once
-#include <bave/graphics/instanced.hpp>
 #include <bave/services/styles.hpp>
 #include <bave/ui/outline_quad.hpp>
+#include <bave/ui/sprite.hpp>
 #include <bave/ui/text.hpp>
 #include <bave/ui/view.hpp>
+#include <spaced/signal.hpp>
 
 namespace spaced {
 struct Layout;
@@ -13,26 +14,31 @@ class Hud : public bave::ui::View {
 	explicit Hud(bave::Services const& services);
 
 	void set_lives(int lives);
-	void on_death();
 	void set_score(std::int64_t score);
 	void set_hi_score(std::int64_t score);
+	void set_weapon(std::shared_ptr<bave::Texture const> texture);
 
   private:
-	void render(bave::Shader& shader) const final;
+	[[nodiscard]] auto make_text(bave::Services const& services) const -> std::unique_ptr<bave::ui::Text>;
 
 	void create_background();
 	void create_score(bave::Services const& services);
-	void create_lives_icon(bave::Services const& services);
+	void create_lives(bave::Services const& services);
+	void create_weapon(bave::Services const& services);
 
-	bave::NotNull<bave::IDisplay const*> m_display;
 	bave::NotNull<Layout const*> m_layout;
 	bave::NotNull<bave::Styles const*> m_styles;
 	glm::vec2 m_text_bounds_size{};
 
+	SignalHandle m_on_weapon_changed{};
+
 	bave::Ptr<bave::ui::OutlineQuad> m_background{};
 	bave::Ptr<bave::ui::Text> m_score{};
 	bave::Ptr<bave::ui::Text> m_hi_score{};
 
-	bave::Instanced<bave::QuadShape> m_lives_icon{};
+	bave::Ptr<bave::ui::Sprite> m_lives_icon{};
+	bave::Ptr<bave::ui::Text> m_lives_count{};
+
+	bave::Ptr<bave::ui::Sprite> m_weapon_icon{};
 };
 } // namespace spaced

src/spaced/spaced/game/arsenal.hpp

@@ -22,7 +22,7 @@ using bave::Shader;
 using bave::Texture;
 
 Player::Player(Services const& services, std::unique_ptr<IController> controller)
-	: m_services(&services), m_stats(&services.get<Stats>()), m_controller(std::move(controller)), m_shield(services) {
+	: m_services(&services), m_stats(&services.get<Stats>()), m_controller(std::move(controller)), m_shield(services), m_arsenal(services) {
 	auto const& layout = services.get<Layout>();
 	ship.transform.position.x = layout.player_x;