PointParticleEmitter.cpp

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#include <tdme/engine/subsystems/particlesystem/PointParticleEmitter.h>
 
#include <tdme/tdme.h>
#include <tdme/engine/Color4.h>
#include <tdme/engine/subsystems/particlesystem/Particle.h>
#include <tdme/engine/Transform.h>
#include <tdme/math/Math.h>
#include <tdme/math/Matrix4x4.h>
#include <tdme/math/Vector3.h>
 
using tdme::engine::Color4;
using tdme::engine::subsystems::particlesystem::Particle;
using tdme::engine::subsystems::particlesystem::PointParticleEmitter;
using tdme::engine::Transform;
using tdme::math::Math;
using tdme::math::Matrix4x4;
using tdme::math::Vector3;
 
PointParticleEmitter::PointParticleEmitter(int32_t count, int64_t lifeTime, int64_t lifeTimeRnd, float mass, float massRnd, const Vector3& position, const Vector3& velocity, const Vector3& velocityRnd, const Color4& colorStart, const Color4& colorEnd)
{
    this->count = count;
    this->lifeTime = lifeTime;
    this->lifeTimeRnd = lifeTimeRnd;
    this->mass = mass;
    this->massRnd = massRnd;
    this->position.set(position);
    this->worldPosition.set(position);
    this->velocity.set(velocity);
    this->velocityRnd.set(velocityRnd);
    this->colorStart.set(colorStart);
    this->colorEnd.set(colorEnd);
}
 
void PointParticleEmitter::emit(Particle* particle)
{
    // set up particle
    particle->active = true;
    particle->spriteIndex = 0.0f;
    particle->position.set(0.0f, 0.0f, 0.0f);
    particle->velocity.set(
        velocity[0] + (Math::random() * velocityRnd[0] * (Math::random() > 0.5 ? +1.0f : -1.0f)),
        velocity[1] + (Math::random() * velocityRnd[1] * (Math::random() > 0.5 ? +1.0f : -1.0f)),
        velocity[2] + (Math::random() * velocityRnd[2] * (Math::random() > 0.5 ? +1.0f : -1.0f))
    );
    particle->mass = mass + static_cast<float>((Math::random() * (massRnd)));
    particle->lifeTimeMax = lifeTime + static_cast<int64_t>((Math::random() * lifeTimeRnd));
    particle->lifeTimeCurrent = 0LL;
    particle->color.set(colorStart);
    particle->colorAdd.set(
        (colorEnd.getRed() - colorStart.getRed()) / particle->lifeTimeMax,
        (colorEnd.getGreen() - colorStart.getGreen()) / particle->lifeTimeMax,
        (colorEnd.getBlue() - colorStart.getBlue()) / particle->lifeTimeMax,
        (colorEnd.getAlpha() - colorStart.getAlpha()) / particle->lifeTimeMax
    );
}
 
void PointParticleEmitter::setTransform(const Transform& transform)
{
    //
    const auto& transformMatrix = transform.getTransformMatrix();
    // world position
    worldPosition = transformMatrix.multiply(position);
}