diff options
| -rw-r--r-- | src/crepe/Particle.cpp | 3 | ||||
| -rw-r--r-- | src/crepe/ParticleEmitter.cpp | 4 | ||||
| -rw-r--r-- | src/crepe/ParticleEmitter.hpp | 4 | ||||
| -rw-r--r-- | src/crepe/ParticleSystem.cpp | 21 | ||||
| -rw-r--r-- | src/crepe/main.cpp | 37 |
5 files changed, 42 insertions, 27 deletions
diff --git a/src/crepe/Particle.cpp b/src/crepe/Particle.cpp index f6bbd34..3254b5b 100644 --- a/src/crepe/Particle.cpp +++ b/src/crepe/Particle.cpp @@ -1,5 +1,5 @@ #include "Particle.hpp" - +#include <iostream> Particle::Particle(float lifespan, Position position, Position velocity) : lifespan(lifespan), position(position), velocity(velocity), timeInLife(0.0f) {} @@ -11,5 +11,6 @@ void Particle::update(float deltaTime) { } bool Particle::isAlive() const { + std::cout << "lifespan" << lifespan << std::endl; return timeInLife < lifespan; } diff --git a/src/crepe/ParticleEmitter.cpp b/src/crepe/ParticleEmitter.cpp index 69f5ace..f5c18db 100644 --- a/src/crepe/ParticleEmitter.cpp +++ b/src/crepe/ParticleEmitter.cpp @@ -1,8 +1,8 @@ #include "ParticleEmitter.hpp" #include <ctime> -ParticleEmitter::ParticleEmitter(unsigned int maxParticles, unsigned int emissionRate, unsigned int speed, unsigned int speedOffset, unsigned int angle, unsigned int angleOffset) - : m_maxParticles(maxParticles), m_emissionRate(emissionRate), m_speed(speed), m_speedOffset(speedOffset), m_position{0, 0} { +ParticleEmitter::ParticleEmitter(unsigned int maxParticles, unsigned int emissionRate, unsigned int speed, unsigned int speedOffset, unsigned int angle, unsigned int angleOffset, float m_beginLifespan, float m_endLifespan) + : m_maxParticles(maxParticles), m_emissionRate(emissionRate), m_speed(speed), m_speedOffset(speedOffset), m_position{0, 0}, m_beginLifespan(m_beginLifespan),m_endLifespan(m_endLifespan) { std::srand(static_cast<unsigned int>(std::time(nullptr))); // initialize random seed m_minAngle = (360 + angle - (angleOffset % 360)) % 360; // calculate minAngle diff --git a/src/crepe/ParticleEmitter.hpp b/src/crepe/ParticleEmitter.hpp index 6826531..f647c27 100644 --- a/src/crepe/ParticleEmitter.hpp +++ b/src/crepe/ParticleEmitter.hpp @@ -5,7 +5,7 @@ class ParticleEmitter { public: - ParticleEmitter(unsigned int maxParticles, unsigned int emissionRate, unsigned int speed, unsigned int speedOffset, unsigned int angle, unsigned int angleOffset); + ParticleEmitter(unsigned int maxParticles, unsigned int emissionRate, unsigned int speed, unsigned int speedOffset, unsigned int angle, unsigned int angleOffset,float m_beginLifespan,float m_endLifespan); struct Position { //struct to hold position float x; float y; @@ -18,6 +18,8 @@ public: unsigned int m_speedOffset; //offset for random speed variation unsigned int m_minAngle; //min angle of particle emission unsigned int m_maxAngle; //max angle of particle emission + float m_beginLifespan; //begin Lifespan of particle (only visual) + float m_endLifespan; //begin Lifespan of particle std::vector<Particle> particles; //collection of particles }; diff --git a/src/crepe/ParticleSystem.cpp b/src/crepe/ParticleSystem.cpp index 367f56c..f3cb939 100644 --- a/src/crepe/ParticleSystem.cpp +++ b/src/crepe/ParticleSystem.cpp @@ -10,13 +10,12 @@ ParticleSystem::ParticleSystem() : m_elapsedTime(0.0f) {} // Initialize m_elaps 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); + float updateAmount = 1/static_cast<float>(emitter.m_emissionRate); + for (float i = 0; i < deltaTime; i += updateAmount) + { emitParticle(emitter); } + //update/move particles afterwards delete if not alive. std::vector<Particle>::iterator it = emitter.particles.begin(); while (it != emitter.particles.end()) { @@ -32,7 +31,7 @@ void ParticleSystem::update(float deltaTime, std::vector<ParticleEmitter>& emitt } void ParticleSystem::emitParticle(ParticleEmitter& emitter) { - std::cout << "new emitter:" << std::endl; + // 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 @@ -45,18 +44,16 @@ void ParticleSystem::emitParticle(ParticleEmitter& emitter) { 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); + // std::cout << "emitter.m_endLifespan:" << emitter.m_endLifespan << std::endl; + + emitter.particles.emplace_back(emitter.m_endLifespan, initialPosition, initialVelocity); } diff --git a/src/crepe/main.cpp b/src/crepe/main.cpp index 40eb04f..314dbed 100644 --- a/src/crepe/main.cpp +++ b/src/crepe/main.cpp @@ -5,6 +5,7 @@ #include "ParticleEmitter.hpp" #include "ParticleSystem.hpp" #include "Particle.hpp" +#include <chrono> const int WINDOW_WIDTH = 800; const int WINDOW_HEIGHT = 600; @@ -19,29 +20,43 @@ int main(int argc, char* argv[]) { ParticleSystem particleSystem; - unsigned int maxParticles = 100; // maximum number of particles - unsigned int emissionRate = 10; // particles created per second + unsigned int maxParticles = 10; // maximum number of particles + unsigned int emissionRate = 1; // particles created per second unsigned int speed = 50; // base speed of particles unsigned int speedOffset = 10; // random offset for particle speed unsigned int angle = 90; // base angle of particle emission unsigned int angleOffset = 30; // random offset for particle angle - - ParticleEmitter emitter1(maxParticles, emissionRate, speed, speedOffset, angle, angleOffset); - emitter1.m_position = {200, 200}; // set the position of the first emitter - - ParticleEmitter emitter2(maxParticles, emissionRate, speed, speedOffset, angle - 90, angleOffset); // Another emitter - emitter2.m_position = {200, 150}; // set the position of the second emitter - - std::vector<ParticleEmitter> emitters = { emitter2 }; // array of emitters - + float beginLifespan = 0.0f; // beginning lifespan of particles + float endLifespan = 2.0f; // ending lifespan of particles + + // Vector to hold all the emitters + std::vector<ParticleEmitter> emitters; + + // Loop to create 1000 emitters + for (unsigned int i = 0; i < 100; ++i) { + ParticleEmitter emitter(maxParticles, emissionRate, speed, speedOffset, angle, angleOffset, beginLifespan, endLifespan); + + // Set a position for each emitter, modifying the position for demonstration + emitter.m_position = {static_cast<float>(200 + (i % 100)), static_cast<float>(200 + (i / 100) * 10)}; // Adjust position for each emitter + + emitters.push_back(emitter); // Add the emitter to the vector + } float deltaTime = 0.1f; bool running = true; while (running) { app.handleEvents(running); + // Start timing + auto start = std::chrono::high_resolution_clock::now(); + particleSystem.update(deltaTime, emitters); // update particle system with delta time and emitters + // End timing + auto end = std::chrono::high_resolution_clock::now(); + std::chrono::duration<float, std::milli> duration = end - start; // get duration in milliseconds + + std::cout << "Update took " << duration.count() << " ms" << std::endl; app.clearScreen(); // render particles using the drawSquare method from SDLApp |