diff options
Diffstat (limited to 'src/crepe/system/ParticleSystem.cpp')
| -rw-r--r-- | src/crepe/system/ParticleSystem.cpp | 72 |
1 files changed, 45 insertions, 27 deletions
diff --git a/src/crepe/system/ParticleSystem.cpp b/src/crepe/system/ParticleSystem.cpp index ad6699b..4a25b47 100644 --- a/src/crepe/system/ParticleSystem.cpp +++ b/src/crepe/system/ParticleSystem.cpp @@ -1,10 +1,10 @@ #include <cmath> -#include <ctime> #include <cstdlib> +#include <ctime> #include "api/ParticleEmitter.h" -#include "api/Vector2.h" #include "api/Transform.h" +#include "api/Vector2.h" #include "ComponentManager.h" #include "ParticleSystem.h" @@ -16,20 +16,25 @@ ParticleSystem::ParticleSystem() {} void ParticleSystem::update() { // Get all emitters ComponentManager & mgr = ComponentManager::get_instance(); - std::vector<std::reference_wrapper<ParticleEmitter>> emitters = mgr.get_components_by_type<ParticleEmitter>(); + std::vector<std::reference_wrapper<ParticleEmitter>> emitters + = mgr.get_components_by_type<ParticleEmitter>(); for (ParticleEmitter & emitter : emitters) { // Get transform linked to emitter - const Transform& transform = mgr.get_components_by_id<Transform>(emitter.game_object_id).front().get(); + const Transform & transform + = 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); + int updates + = calculate_update(this->update_count, emitter.data.emission_rate); for (size_t i = 0; i < updates; i++) { emit_particle(emitter, transform); } // Update all particles - for (Particle& particle : emitter.data.particles) { + for (Particle & particle : emitter.data.particles) { if (particle.active) { particle.update(); } @@ -42,23 +47,25 @@ void ParticleSystem::update() { this->update_count = (this->update_count + 1) % this->MAX_UPDATE_COUNT; } -void ParticleSystem::emit_particle(ParticleEmitter & emitter, const Transform& transform) { +void ParticleSystem::emit_particle(ParticleEmitter & emitter, + const Transform & transform) { constexpr double DEG_TO_RAD = M_PI / 180.0; Vector2 initial_position = emitter.data.position + transform.position; - double random_angle = generate_random_angle(emitter.data.min_angle, emitter.data.max_angle); + double random_angle + = generate_random_angle(emitter.data.min_angle, emitter.data.max_angle); - double random_speed = generate_random_speed(emitter.data.min_speed, emitter.data.max_speed); + double random_speed + = generate_random_speed(emitter.data.min_speed, emitter.data.max_speed); double angle_radians = random_angle * DEG_TO_RAD; - Vector2 velocity = { - random_speed * std::cos(angle_radians), - random_speed * std::sin(angle_radians) - }; + Vector2 velocity = {random_speed * std::cos(angle_radians), + random_speed * std::sin(angle_radians)}; - for (Particle& particle : emitter.data.particles) { + for (Particle & particle : emitter.data.particles) { if (!particle.active) { - particle.reset(emitter.data.end_lifespan, initial_position, velocity, random_angle); + particle.reset(emitter.data.end_lifespan, initial_position, + velocity, random_angle); break; } } @@ -69,15 +76,17 @@ int ParticleSystem::calculate_update(int count, double emission) const { 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; + 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) { - Vector2 offset = emitter.data.boundary.offset + transform.position + emitter.data.position; +void ParticleSystem::check_bounds(ParticleEmitter & emitter, + const Transform & transform) { + Vector2 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; @@ -86,9 +95,10 @@ void ParticleSystem::check_bounds(ParticleEmitter & emitter, const Transform& tr const double TOP = offset.y - half_height; const double BOTTOM = offset.y + half_height; - for (Particle& particle : emitter.data.particles) { - const Vector2& position = particle.position; - bool within_bounds = (position.x >= LEFT && position.x <= RIGHT && position.y >= TOP && position.y <= BOTTOM); + for (Particle & particle : emitter.data.particles) { + const Vector2 & 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) { @@ -104,22 +114,30 @@ void ParticleSystem::check_bounds(ParticleEmitter & emitter, const Transform& tr } } -double ParticleSystem::generate_random_angle(double min_angle, double max_angle) const { +double ParticleSystem::generate_random_angle(double min_angle, + double 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)); + return min_angle + + static_cast<double>(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)); + double random_angle = min_angle + + static_cast<double>( + 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 { +double ParticleSystem::generate_random_speed(double min_speed, + double 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)); + return min_speed + + static_cast<double>(std::rand() + % static_cast<int>(max_speed - min_speed)); } } |