4 files changed, 35 insertions, 60 deletions

diff --git a/src/crepe/system/CollisionSystem.cpp b/src/crepe/system/CollisionSystem.cpp
index 44a0431..952ed0a 100644
--- a/src/crepe/system/CollisionSystem.cpp
+++ b/src/crepe/system/CollisionSystem.cpp
@@ -290,7 +290,7 @@ vec2 CollisionSystem::get_circle_box_resolution(const CircleCollider & circle_co
 
 	// Compute penetration depth
 	float penetration_depth = circle_collider.radius - distance;
-
+	
 	// Compute the resolution vector
 	vec2 resolution = collision_normal * penetration_depth;
 
diff --git a/src/crepe/system/ParticleSystem.cpp b/src/crepe/system/ParticleSystem.cpp
index b14c52f..85b8248 100644
--- a/src/crepe/system/ParticleSystem.cpp
+++ b/src/crepe/system/ParticleSystem.cpp
@@ -1,3 +1,4 @@
+#include <chrono>
 #include <cmath>
 #include <cstdlib>
 #include <ctime>
@@ -5,6 +6,7 @@
 #include "../api/ParticleEmitter.h"
 #include "../api/Transform.h"
 #include "../manager/ComponentManager.h"
+#include "../manager/LoopTimerManager.h"
 
 #include "ParticleSystem.h"
 
@@ -12,7 +14,11 @@ using namespace crepe;
 
 void ParticleSystem::update() {
 	// Get all emitters
-	ComponentManager & mgr = this->mediator.component_manager;
+	const Mediator & mediator = this->mediator;
+	LoopTimerManager & loop_timer = mediator.loop_timer;
+	ComponentManager & mgr = mediator.component_manager;
+	float dt = loop_timer.get_scaled_fixed_delta_time().count();
+
 	RefVector<ParticleEmitter> emitters = mgr.get_components_by_type<ParticleEmitter>();
 
 	for (ParticleEmitter & emitter : emitters) {
@@ -21,32 +27,31 @@ void ParticleSystem::update() {
 			= mgr.get_components_by_id<Transform>(emitter.game_object_id).front().get();
 
 		// Emit particles based on emission_rate
-		int updates = calculate_update(this->update_count, emitter.data.emission_rate);
-		for (size_t i = 0; i < updates; i++) {
-			emit_particle(emitter, transform);
-		}
-
+		emitter.spawn_accumulator = emitter.data.emission_rate * dt;
+		while (emitter.spawn_accumulator >= 1.0) {
+			this->emit_particle(emitter, transform);
+			emitter.spawn_accumulator -= 1.0;
+    }
+		
 		// Update all particles
 		for (Particle & particle : emitter.data.particles) {
 			if (particle.active) {
-				particle.update();
+				particle.update(dt);
 			}
 		}
 
 		// Check if within boundary
-		check_bounds(emitter, transform);
+		this->check_bounds(emitter, transform);
 	}
-
-	this->update_count = (this->update_count + 1) % this->MAX_UPDATE_COUNT;
 }
 
 void ParticleSystem::emit_particle(ParticleEmitter & emitter, const Transform & transform) {
 	constexpr float DEG_TO_RAD = M_PI / 180.0;
 
 	vec2 initial_position = emitter.data.position + transform.position;
-	float random_angle = generate_random_angle(emitter.data.min_angle, emitter.data.max_angle);
+	float random_angle = this->generate_random_angle(emitter.data.min_angle, emitter.data.max_angle);
 
-	float random_speed = generate_random_speed(emitter.data.min_speed, emitter.data.max_speed);
+	float random_speed = this->generate_random_speed(emitter.data.min_speed, emitter.data.max_speed);
 	float angle_radians = random_angle * DEG_TO_RAD;
 
 	vec2 velocity
@@ -61,33 +66,20 @@ void ParticleSystem::emit_particle(ParticleEmitter & emitter, const Transform &
 	}
 }
 
-int ParticleSystem::calculate_update(int count, double emission) const {
-	double integer_part = std::floor(emission);
-	double fractional_part = emission - integer_part;
-
-	if (fractional_part > 0) {
-		int denominator = static_cast<int>(1.0 / fractional_part);
-		return (count % denominator == 0) ? 1 : 0;
-	}
-
-	return static_cast<int>(emission);
-}
-
 void ParticleSystem::check_bounds(ParticleEmitter & emitter, const Transform & transform) {
 	vec2 offset = emitter.data.boundary.offset + transform.position + emitter.data.position;
-	double half_width = emitter.data.boundary.width / 2.0;
-	double half_height = emitter.data.boundary.height / 2.0;
+	float half_width = emitter.data.boundary.width / 2.0;
+	float half_height = emitter.data.boundary.height / 2.0;
 
-	const double LEFT = offset.x - half_width;
-	const double RIGHT = offset.x + half_width;
-	const double TOP = offset.y - half_height;
-	const double BOTTOM = offset.y + half_height;
+	const float LEFT = offset.x - half_width;
+	const float RIGHT = offset.x + half_width;
+	const float TOP = offset.y - half_height;
+	const float BOTTOM = offset.y + half_height;
 
 	for (Particle & particle : emitter.data.particles) {
 		const vec2 & position = particle.position;
 		bool within_bounds = (position.x >= LEFT && position.x <= RIGHT && position.y >= TOP
 							  && position.y <= BOTTOM);
-
 		if (!within_bounds) {
 			if (emitter.data.boundary.reset_on_exit) {
 				particle.active = false;
@@ -102,25 +94,25 @@ void ParticleSystem::check_bounds(ParticleEmitter & emitter, const Transform & t
 	}
 }
 
-double ParticleSystem::generate_random_angle(double min_angle, double max_angle) const {
+float ParticleSystem::generate_random_angle(float min_angle, float max_angle) const {
 	if (min_angle == max_angle) {
 		return min_angle;
 	} else if (min_angle < max_angle) {
 		return min_angle
-			   + static_cast<double>(std::rand() % static_cast<int>(max_angle - min_angle));
+			   + static_cast<float>(std::rand() % static_cast<int>(max_angle - min_angle));
 	} else {
-		double angle_offset = (360 - min_angle) + max_angle;
-		double random_angle
-			= min_angle + static_cast<double>(std::rand() % static_cast<int>(angle_offset));
+		float angle_offset = (360 - min_angle) + max_angle;
+		float random_angle
+			= min_angle + static_cast<float>(std::rand() % static_cast<int>(angle_offset));
 		return (random_angle >= 360) ? random_angle - 360 : random_angle;
 	}
 }
 
-double ParticleSystem::generate_random_speed(double min_speed, double max_speed) const {
+float ParticleSystem::generate_random_speed(float min_speed, float max_speed) const {
 	if (min_speed == max_speed) {
 		return min_speed;
 	} else {
 		return min_speed
-			   + static_cast<double>(std::rand() % static_cast<int>(max_speed - min_speed));
+			   + static_cast<float>(std::rand() % static_cast<int>(max_speed - min_speed));
 	}
 }
diff --git a/src/crepe/system/ParticleSystem.h b/src/crepe/system/ParticleSystem.h
index 068f01c..95a2bd5 100644
--- a/src/crepe/system/ParticleSystem.h
+++ b/src/crepe/system/ParticleSystem.h
@@ -23,6 +23,7 @@ public:
 	void update() override;
 
 private:
+
 	/**
 	 * \brief Emits a particle from the specified emitter based on its emission properties.
 	 *
@@ -32,16 +33,6 @@ private:
 	void emit_particle(ParticleEmitter & emitter, const Transform & transform);
 
 	/**
-	 * \brief Calculates the number of times particles should be emitted based on emission rate
-	 * and update count.
-	 *
-	 * \param count Current update count.
-	 * \param emission Emission rate.
-	 * \return The number of particles to emit.
-	 */
-	int calculate_update(int count, double emission) const;
-
-	/**
 	 * \brief Checks whether particles are within the emitter’s boundary, resets or stops
 	 * particles if they exit.
 	 *
@@ -57,7 +48,7 @@ private:
 	 * \param max_angle Maximum emission angle in degrees.
 	 * \return Random angle in degrees.
 	 */
-	double generate_random_angle(double min_angle, double max_angle) const;
+	float generate_random_angle(float min_angle, float max_angle) const;
 
 	/**
 	 * \brief Generates a random speed for particle emission within the specified range.
@@ -66,15 +57,7 @@ private:
 	 * \param max_speed Maximum emission speed.
 	 * \return Random speed.
 	 */
-	double generate_random_speed(double min_speed, double max_speed) const;
-
-private:
-	//! Counter to count updates to determine how many times emit_particle is
-	// called.
-	unsigned int update_count = 0;
-	//! Determines the lowest amount of emission rate (1000 = 0.001 = 1 particle per 1000
-	// updates).
-	static constexpr unsigned int MAX_UPDATE_COUNT = 100;
+	float generate_random_speed(float min_speed, float max_speed) const;
 };
 
 } // namespace crepe
diff --git a/src/crepe/system/RenderSystem.cpp b/src/crepe/system/RenderSystem.cpp
index afd9548..cc633e8 100644
--- a/src/crepe/system/RenderSystem.cpp
+++ b/src/crepe/system/RenderSystem.cpp
@@ -83,7 +83,7 @@ bool RenderSystem::render_particle(const Sprite & sprite, const double & scale)
 	bool rendering_particles = false;
 
 	for (const ParticleEmitter & em : emitters) {
-		if (&em.data.sprite != &sprite) continue;
+		if (&em.sprite != &sprite) continue;
 		rendering_particles = true;
 		if (!em.active) continue;