More enemy and powerup types. (#52)

* WIP: bgf v0.1.7.

* Enable player to 1up spare lives.

* Add `powerup::OneUp` and powerup sfx.

* Check projectile bounds on both sides.

* Fixup spare lives display on HUD.

* Prepare for enemy rounds.

* Add `enemy::Trooper`.

* Move translation logic to `Enemy`.

* Nerf responsiveness when holding fire.

* Add `Trooper`, `Gunner`.

Add 1px border around sprite images.

* Cleanup, finalize bgf v0.1.7.

Author: karnkaul

CMakeLists.txt

@@ -11,9 +11,7 @@ include(FetchContent)
 FetchContent_Declare(
   bgf
   GIT_REPOSITORY https://github.com/karnkaul/bgf
-
-  # GIT_TAG v0.1.5
-  GIT_TAG adc217f
+  GIT_TAG v0.1.7
   SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ext/bgf"
 )
 

assets/images/creep_ship.png

@@ -33,7 +33,7 @@
     },
     "lerp": {
       "tint": {
-        "lo": "#36bbf5ff",
+        "lo": "#ffffffff",
         "hi": "#00000000"
       },
       "scale": {
@@ -58,4 +58,4 @@
     "count": 200,
     "respawn": true
   }
-}
+}

assets/images/icon_player.png

@@ -7,6 +7,7 @@
     "ice": "#d6dbe1e1",
     "orange": "#f75c03ff",
     "gun_beam": "#bc96e6ff",
+    "exhaust": "#36bbf5ff",
     "bg_top": "#10020eff",
     "bg_bottom": "#040003ff"
   },
@@ -36,7 +37,7 @@
       "background": "#9f2b68ff",
       "fill": "milk",
       "corner_ratio": 0.5,
-      "padding": 10
+      "padding": 20
     },
     "enemy": {
       "background": "orange",

assets/images/player_ship.png

@@ -8,6 +8,7 @@ auto FollowController::tick(Seconds const dt) -> float {
 	auto const y = tick_y(dt);
 
 	m_spring_arm.target = glm::vec2{0.0f, y};
+	m_spring_arm.k = is_firing() ? m_spring_k.hi : m_spring_k.lo;
 	m_spring_arm.tick(dt);
 
 	return m_spring_arm.position.y;
@@ -16,6 +17,8 @@ auto FollowController::tick(Seconds const dt) -> float {
 void FollowController::do_inspect() {
 	if constexpr (bave::imgui_v) {
 		if (ImGui::TreeNode("spring arm")) {
+			ImGui::DragFloat("k.lo", &m_spring_k.lo, 1.0f, 1.0f, 1000.0f);
+			ImGui::DragFloat("k.hi", &m_spring_k.hi, 1.0f, 1.0f, 1000.0f);
 			ImGui::DragFloat("k", &m_spring_arm.k, 1.0f, 1.0f, 1000.0f);
 			ImGui::DragFloat("damp", &m_spring_arm.damp, 0.01f, 0.01f, 0.99f);
 			ImGui::DragFloat("min distance", &m_spring_arm.min_distance, 0.01f, 0.01f, 1000.0f);

assets/images/player_ship_icon.png

@@ -1,4 +1,5 @@
 #pragma once
+#include <bave/core/inclusive_range.hpp>
 #include <spaced/game/controller.hpp>
 #include <spaced/game/spring_arm.hpp>
 
@@ -12,5 +13,6 @@ class FollowController : public IController {
 	void do_inspect() override;
 
 	SpringArm m_spring_arm{};
+	bave::InclusiveRange<float> m_spring_k{200.0f, 40.0f};
 };
 } // namespace spaced

assets/images/beam_round.png renamed to assets/images/round_beam.png

@@ -15,9 +15,12 @@ using bave::PointerTap;
 using bave::Seconds;
 using bave::Services;
 
-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)
+PlayerController::PlayerController(Services const& services, Type const type)
+	: m_layout(&services.get<Layout>()), m_gamepad_provider(&services.get<IGamepadProvider>()), m_type(type) {
+	auto const half_size = 0.5f * m_layout->player_size;
+	auto const play_area = m_layout->play_area;
+	max_y = play_area.lt.y - half_size.y;
+	min_y = play_area.rb.y + half_size.y;
 }
 
 void PlayerController::on_move(PointerMove const& pointer_move) {

assets/images/kinetic_projectile.png renamed to assets/images/round_kinetic_green.png

@@ -18,7 +18,7 @@ class PlayerController : public FollowController {
 
 	[[nodiscard]] auto get_type_name() const -> std::string_view final { return type_name_v; };
 
-	explicit PlayerController(bave::Services const& services);
+	explicit PlayerController(bave::Services const& services, Type type);
 
 	void on_move(bave::PointerMove const& pointer_move) final;
 	void on_tap(bave::PointerTap const& pointer_tap) final;

assets/images/round_kinetic_red.png

@@ -3,21 +3,15 @@
 
 namespace spaced::enemy {
 using bave::Resources;
-using bave::Seconds;
 using bave::Texture;
 
 Creep::Creep(bave::Services const& services) : Enemy(services, "Creep") {
-	m_sprite.set_texture(services.get<Resources>().get<Texture>("images/creep_ship.png"));
-	m_sprite.set_size(glm::vec2{80.0f});
-	health = 2.0f;
-}
-
-void Creep::tick(Seconds const dt, bool const in_play) {
-	if (!in_play) { return; }
-
-	m_sprite.transform.position.x -= x_speed * dt.count();
-	if (m_sprite.transform.position.x < -0.5f * (get_layout().world_space.x + m_sprite.get_shape().size.x)) { set_destroyed(); }
+	if (auto texture = services.get<Resources>().get<Texture>("images/ship_creep.png")) {
+		m_sprite.set_size(texture->get_size());
+		m_sprite.set_texture(std::move(texture));
+	}
 
-	update_health_bar();
+	health = 1.0f;
+	speed = 100.0f;
 }
 } // namespace spaced::enemy

assets/images/ship_creep.png

@@ -5,9 +5,5 @@ namespace spaced::enemy {
 class Creep : public Enemy {
   public:
 	explicit Creep(bave::Services const& services);
-
-	void tick(bave::Seconds dt, bool in_play) override;
-
-	float x_speed{100.0f};
 };
 } // namespace spaced::enemy

assets/images/ship_gunner.png

@@ -0,0 +1,17 @@
+#include <bave/services/resources.hpp>
+#include <spaced/game/enemies/gunner.hpp>
+
+namespace spaced::enemy {
+using bave::Resources;
+using bave::Texture;
+
+Gunner::Gunner(bave::Services const& services, bave::NotNull<GunKinetic*> gun) : GunnerBase(services, gun, "Gunner") {
+	if (auto texture = services.get<Resources>().get<Texture>("images/ship_gunner.png")) {
+		m_sprite.set_size(texture->get_size());
+		m_sprite.set_texture(std::move(texture));
+	}
+
+	health = 2.0f;
+	speed = 120.0f;
+}
+} // namespace spaced::enemy

assets/images/ship_player.png

@@ -0,0 +1,9 @@
+#pragma once
+#include <spaced/game/enemies/gunner_base.hpp>
+
+namespace spaced::enemy {
+class Gunner : public GunnerBase {
+  public:
+	explicit Gunner(bave::Services const& services, bave::NotNull<GunKinetic*> gun);
+};
+} // namespace spaced::enemy

assets/images/ship_trooper.png

@@ -0,0 +1,24 @@
+#include <spaced/game/enemies/gunner_base.hpp>
+
+namespace spaced::enemy {
+using bave::NotNull;
+using bave::Seconds;
+using bave::Services;
+
+GunnerBase::GunnerBase(Services const& services, NotNull<GunKinetic*> gun, std::string_view const type) : Enemy(services, type), m_gun(gun) {}
+
+void GunnerBase::do_tick(Seconds const dt) { m_fire_elapsed += dt; }
+
+auto GunnerBase::make_round() -> std::unique_ptr<IWeaponRound> {
+	if (m_fire_elapsed < m_fire_rate) { return {}; }
+
+	m_fire_elapsed = 0s;
+	return m_gun->fire(get_muzzle_position());
+}
+
+auto GunnerBase::get_muzzle_position() const -> glm::vec2 {
+	auto ret = m_sprite.transform.position;
+	ret.x -= m_sprite.get_size().x;
+	return ret;
+}
+} // namespace spaced::enemy

assets/particles/exhaust.json

@@ -0,0 +1,21 @@
+#pragma once
+#include <spaced/game/enemy.hpp>
+#include <spaced/game/weapons/gun_kinetic.hpp>
+
+namespace spaced::enemy {
+class GunnerBase : public Enemy {
+  public:
+	explicit GunnerBase(bave::Services const& services, bave::NotNull<GunKinetic*> gun, std::string_view type);
+
+  protected:
+	auto make_round() -> std::unique_ptr<IWeaponRound> final;
+	void do_tick(bave::Seconds dt) override;
+
+	[[nodiscard]] auto get_muzzle_position() const -> glm::vec2;
+
+	bave::NotNull<GunKinetic*> m_gun;
+	bave::Seconds m_fire_rate{3.3s};
+
+	bave::Seconds m_fire_elapsed{};
+};
+} // namespace spaced::enemy

assets/sfx/kinetic_fire1.wav

@@ -0,0 +1,37 @@
+#include <bave/core/random.hpp>
+#include <bave/services/resources.hpp>
+#include <spaced/game/enemies/trooper.hpp>
+
+namespace spaced::enemy {
+using bave::NotNull;
+using bave::random_in_range;
+using bave::Resources;
+using bave::Seconds;
+using bave::Services;
+using bave::Texture;
+
+namespace {
+constexpr auto at_end(float const y, float const y_min, float const y_max) { return y_min > y || y > y_max; }
+} // namespace
+
+Trooper::Trooper(Services const& services, NotNull<GunKinetic*> gun) : GunnerBase(services, gun, "Trooper") {
+	if (auto texture = services.get<Resources>().get<Texture>("images/ship_trooper.png")) {
+		m_sprite.set_size(texture->get_size());
+		m_sprite.set_texture(std::move(texture));
+	}
+
+	m_direction = random_in_range(0, 1) == 0 ? 1.0f : -1.0f;
+
+	health = 3.0f;
+	speed = 150.0f;
+}
+
+void Trooper::do_tick(Seconds const dt) {
+	GunnerBase::do_tick(dt);
+
+	m_sprite.transform.position.y += m_direction * m_y_speed * dt.count();
+	auto const y_min = get_layout().play_area.rb.y + m_sprite.get_size().y;
+	auto const y_max = get_layout().play_area.lt.y - m_sprite.get_size().y;
+	if (at_end(m_sprite.transform.position.y, y_min, y_max)) { m_direction = -m_direction; }
+}
+} // namespace spaced::enemy

assets/sfx/powerup_collect.wav

@@ -0,0 +1,16 @@
+#pragma once
+#include <spaced/game/enemies/gunner_base.hpp>
+#include <spaced/game/weapons/gun_kinetic.hpp>
+
+namespace spaced::enemy {
+class Trooper : public GunnerBase {
+  public:
+	explicit Trooper(bave::Services const& services, bave::NotNull<GunKinetic*> gun);
+
+  private:
+	void do_tick(bave::Seconds dt) final;
+
+	float m_y_speed{150.0f};
+	float m_direction{1.0f};
+};
+} // namespace spaced::enemy

assets/styles.json

@@ -43,12 +43,24 @@ void Enemy::force_death() {
 }
 
 void Enemy::update_health_bar() {
-	m_health_bar.position = m_sprite.transform.position;
-	m_health_bar.position.y += 0.5f * m_sprite.get_shape().size.y + 20.0f;
-	m_health_bar.size = {m_sprite.get_shape().size.x, 10.0f};
+	auto position = m_sprite.transform.position;
+	position.y += 0.5f * m_sprite.get_shape().size.y + 20.0f;
+	m_health_bar.set_position(position);
+	m_health_bar.set_size({m_sprite.get_shape().size.x, 10.0f});
 	m_health_bar.set_progress(health.get_hit_points() / health.get_total_hit_points());
 }
 
+auto Enemy::tick(Seconds const dt) -> std::unique_ptr<IWeaponRound> {
+	do_tick(dt);
+
+	m_sprite.transform.position.x -= speed * dt.count();
+	if (m_sprite.transform.position.x < -0.5f * (get_layout().world_space.x + m_sprite.get_shape().size.x)) { set_destroyed(); }
+
+	update_health_bar();
+
+	return make_round();
+}
+
 void Enemy::draw(Shader& shader) const {
 	m_sprite.draw(shader);
 	m_health_bar.draw(shader);

src/spaced/spaced/game/controllers/follow_controller.cpp

@@ -6,6 +6,7 @@
 #include <bave/ui/progress_bar.hpp>
 #include <spaced/game/damageable.hpp>
 #include <spaced/game/health.hpp>
+#include <spaced/game/weapon_round.hpp>
 #include <spaced/services/layout.hpp>
 
 namespace spaced {
@@ -24,7 +25,7 @@ class Enemy : public IDamageable, public bave::IDrawable {
 	[[nodiscard]] auto is_destroyed() const -> bool { return is_dead() || m_destroyed; }
 	void set_destroyed() { m_destroyed = true; }
 
-	virtual void tick(bave::Seconds dt, bool in_play) = 0;
+	auto tick(bave::Seconds dt) -> std::unique_ptr<IWeaponRound>;
 	void draw(bave::Shader& shader) const override;
 
 	void setup(glm::vec2 max_size, float y_position);
@@ -38,11 +39,15 @@ class Enemy : public IDamageable, public bave::IDrawable {
 
 	Health health{};
 	std::int64_t points{10};
+	float speed{100.0f};
 
 	std::string death_emitter{"particles/explode.json"};
 	std::vector<std::string> death_sfx{"sfx/swish.wav"};
 
   protected:
+	virtual void do_tick(bave::Seconds /*dt*/) {}
+	virtual auto make_round() -> std::unique_ptr<IWeaponRound> { return {}; }
+
 	bave::Sprite m_sprite{};
 	std::optional<glm::vec2> m_hitbox{};
 

src/spaced/spaced/game/controllers/follow_controller.hpp

@@ -86,7 +86,7 @@ void Hud::create_lives(Services const& services) {
 	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")) {
+	if (auto const texture = resources.get<Texture>("images/icon_player.png")) {
 		m_lives_icon->sprite.set_texture(texture);
 		m_lives_icon->sprite.set_size(texture->get_size());
 	}