From 4a435b8fe98c5db1ecd95619997af10146135e85 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Thu, 9 Jan 2025 17:33:00 +0100
Subject: improve player responsiveness

---
 game/player/PlayerScript.cpp | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

(limited to 'game/player/PlayerScript.cpp')

diff --git a/game/player/PlayerScript.cpp b/game/player/PlayerScript.cpp
index fadca9c..c3843ca 100644
--- a/game/player/PlayerScript.cpp
+++ b/game/player/PlayerScript.cpp
@@ -18,8 +18,38 @@ void PlayerScript::init() {
 	subscribe<CollisionEvent>([this](const CollisionEvent & ev) -> bool {
 		return this->on_collision(ev);
 	});
+	subscribe<KeyPressEvent>([this](const KeyPressEvent & ev) -> bool {
+		if (ev.repeat) return false;
+		return this->on_key_down(ev);
+	});
+	subscribe<KeyReleaseEvent>([this](const KeyReleaseEvent & ev) -> bool {
+		return this->on_key_up(ev);
+	});
 	this->last_fired = std::chrono::steady_clock::now();
+	this->body = get_component<Rigidbody>();
 }
+
+bool PlayerScript::on_key_down(const KeyPressEvent & ev) {
+	const vec2 UP = {0, -1};
+	this->help_kick(UP);
+	return false;
+}
+
+bool PlayerScript::on_key_up(const KeyReleaseEvent & ev) {
+	const vec2 DOWN = {0, 1};
+	this->help_kick(DOWN);
+	return false;
+}
+
+void PlayerScript::help_kick(const vec2 & direction) {
+	// softly "kick" the player (at start/end of flight)
+	vec2 & velocity = this->body->data.linear_velocity;
+	float kick_amount = std::min(
+		velocity.length() * PLAYER_HELP_KICK_SCALE, engine_gravity * PLAYER_HELP_KICK_MAX
+	);
+	velocity += direction * kick_amount;
+}
+
 bool PlayerScript::on_collision(const CollisionEvent & ev) {
 	BehaviorScript & play_scr = this->get_components_by_name<BehaviorScript>("player").front();
 	BehaviorScript & end_scr = this->get_components_by_name<BehaviorScript>("player").back();
@@ -94,7 +124,7 @@ void PlayerScript::fixed_update(crepe::duration_t dt) {
 		emitter.data.boundary.offset = vec2(0, -transform.position.y);
 	}
 
-	Rigidbody & rb = this->get_components_by_name<Rigidbody>("player").front();
+	Rigidbody & rb = this->body;
 	if (this->get_key_state(Keycode::ENTER)) {
 
 		auto now = std::chrono::steady_clock::now();
@@ -105,7 +135,10 @@ void PlayerScript::fixed_update(crepe::duration_t dt) {
 		}
 	}
 	if (this->get_key_state(Keycode::SPACE)) {
-		rb.add_force_linear(vec2(0, -PLAYER_GRAVITY_SCALE / 2.5) * dt.count() / 0.02);
+		rb.add_force_linear(
+			vec2(0, -1) * (engine_gravity * PLAYER_GRAVITY_SCALE * dt.count())
+		);
+
 		if (prev_anim != 1) {
 			for (Animator & anim : animators) {
 				anim.active = true;
@@ -127,7 +160,7 @@ void PlayerScript::fixed_update(crepe::duration_t dt) {
 			current_jetpack_sound = 0;
 		}
 	} else if (transform.position.y == 195) {
-		Rigidbody & rb = this->get_components_by_name<Rigidbody>("player").front();
+		Rigidbody & rb = this->body;
 		if (prev_anim != 0 && rb.data.linear_velocity.x != 0) {
 			for (Animator & anim : animators) {
 				anim.active = true;
-- 
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