created a particel system

1 files changed, 62 insertions, 0 deletions

diff --git a/src/crepe/ParticleSystem.cpp b/src/crepe/ParticleSystem.cpp
new file mode 100644
index 0000000..367f56c
--- /dev/null
+++ b/src/crepe/ParticleSystem.cpp
@@ -0,0 +1,62 @@
+#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);
+}