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#include "ParticleSystem.hpp"
#include <cmath>
// #include <cstdlib>
#include <ctime>
#include <iostream> // include iostream for std::cout
#include "ParticleEmitter.hpp"
#include "Particle.hpp"
ParticleSystem::ParticleSystem() : m_elapsedTime(0.0f) {} // Initialize m_elapsedTime to 0
void ParticleSystem::update(float deltaTime, std::vector<ParticleEmitter>& emitters) {
for (ParticleEmitter& emitter : emitters) {
m_elapsedTime = deltaTime;
//spawn new particles if enough time passed and the max is not achieved
while (m_elapsedTime >= (1.0f / emitter.m_emissionRate) && emitter.particles.size() < emitter.m_maxParticles) {
m_elapsedTime -= (1.0f / emitter.m_emissionRate);
emitParticle(emitter);
}
//update/move particles afterwards delete if not alive.
std::vector<Particle>::iterator it = emitter.particles.begin();
while (it != emitter.particles.end()) {
it->update(deltaTime);
if (!it->isAlive()) {
it = emitter.particles.erase(it);
} else {
++it;
}
}
}
}
void ParticleSystem::emitParticle(ParticleEmitter& emitter) {
std::cout << "new emitter:" << std::endl;
Particle::Position initialPosition = { emitter.m_position.x, emitter.m_position.y };
float randomAngle = 0.0f;
//check if value is overthe 360 degrees
if(emitter.m_maxAngle < emitter.m_minAngle)
{
randomAngle = ((emitter.m_minAngle + (std::rand() % (static_cast<int>(emitter.m_maxAngle + 360 - emitter.m_minAngle + 1))))%360);
}
else
{
randomAngle = emitter.m_minAngle + (std::rand() % (static_cast<int>(emitter.m_maxAngle - emitter.m_minAngle + 1)));
}
std::cout << "randomAngle:" << randomAngle << std::endl;
float angleInRadians = randomAngle * (M_PI / 180.0f);
float randomSpeedOffset = (static_cast<float>(std::rand()) / RAND_MAX) * (2 * emitter.m_speedOffset) - emitter.m_speedOffset;
float velocityX = (emitter.m_speed + randomSpeedOffset) * std::cos(angleInRadians);
float velocityY = (emitter.m_speed + randomSpeedOffset) * std::sin(angleInRadians);
std::cout << "velocityX:" << velocityX << std::endl;
std::cout << "velocityY:" << velocityY << std::endl;
Particle::Position initialVelocity = {
velocityX,
velocityY
};
std::cout << "initialVelocityX:" << initialVelocity.x << std::endl;
std::cout << "initialVelocityY:" << initialVelocity.y << std::endl;
emitter.particles.emplace_back(2.0f, initialPosition, initialVelocity);
}
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