DemoEngine

This project is a particle library in C++. Easily to implement in any engine in order to create a particle system for a video game.

How to use it.

Include ParticleSystem.h, particle.lib, particle.dll and the 3 particle shaders in your project

First, initialize the library calling:

Part::StartLibrary()

Next load the shaders added previously and save the int value. you will need this UID integer to draw:

int Part::SetShader(char* vertexPath, char* geometryPath, char* fragmentPath)

Every time you change the camera you need to set the position pointer.

Part::SetCameraPos(float* cameraPos)

You have to provide a function to be called every time.

Part::Update(float dt)

You can get all the Emitters list to discard all the emitters out of the camera with your Camera culling

Part::GetEmitters(std::list<ParticleEmitter*>& emitters)

Then you have to draw all the emitter particles you want after the scene render:

Part::Draw(unsigned int shaderProgramUuid, float* view matrix, float*projMatrix, std::list<ParticleEmitter*> emittersToDraw)

Particle Emitters.

Each emitter system has to be created with his position and the max particles that the emitter will draw at the same time and save the pointer.

ParticleEmitter* Part::CreateEmitter(float* emitterPos, int maxParticles)

You can change the max particles

ParticleEmitter::ChangeMaxParticle(int maxParticles)

After creating the emitter you can get and set all the particle and emitter values

ParticleEmitter::GetEmitterValues();
ParticleEmitter::SetEmitterValues(EmitterValues values);

ParticleEmitter::SetParticlesValues();
ParticleEmitter::GetParticleValues(ParticleValues values);

If you change the emitter position after creating it you have to set it

ParticleEmitter::SetGlobalPos(float* position)

To start, stop or pause the emitters, it has similar functions changing just the beginning

Part::StartAllEmitters();
//Specific emitter
Part::StartEmmitter(ParticleEmitter* emitter);

Remove an existing emitter. If the emitter doesn't exist the function returns false.

Part:: RemoveEmitter(ParticleEmitter* emitter)

Close the library always with

Part::CleanUpLibrary();