Method visit

Source/Node/Particle.cpp:422–521

}

void ParticleNode::visit() {
	if (_flags.isOff(ParticleNode::Emitting)) {
		Node::visit();
		return;
	}
	float deltaTime = s_cast<float>(getScheduler()->getDeltaTime());
	if (_flags.isOn(ParticleNode::Active) && _particleDef->emissionRate) {
		float rate = 1.0f / _particleDef->emissionRate;
		if (s_cast<uint32_t>(_particles.size()) < _particleDef->maxParticles) {
			_emitCounter += deltaTime;
		}
		while (s_cast<uint32_t>(_particles.size()) < _particleDef->maxParticles && _emitCounter > rate) {
			addParticle();
			_emitCounter -= rate;
		}
		_elapsed += deltaTime;
		if (_particleDef->duration >= 0 && _particleDef->duration < _elapsed) {
			stop();
		}
	}

	float scaleX = getScaleX(), scaleY = getScaleY(), angleX = getAngleX(), angleY = getAngleY();
	for (Node* parent = Node::getParent(); parent; parent = parent->getParent()) {
		scaleX *= parent->getScaleX();
		scaleY *= parent->getScaleY();
		angleX += parent->getAngleX();
		angleY += parent->getAngleY();
	}
	scaleX = std::abs(scaleX);
	scaleY = std::abs(scaleY);
	float scale = Vec2{scaleX, scaleY}.length() / std::sqrt(2.0f);

	_quads.clear();
	int index = 0;
	while (index < s_cast<int>(_particles.size())) {
		Particle& p = _particles[index];
		p.timeToLive -= deltaTime;
		if (p.timeToLive > 0) {
			switch (_particleDef->emitterMode) {
				case EmitterMode::Gravity: {
					Vec2 tmp, radial, tangential;
					radial = Vec2::zero;

					if (p.pos.x || p.pos.y) {
						radial = p.pos;
						radial.normalize();
					}
					tangential = radial;
					radial *= p.mode.gravity.radialAccel;

					float newy = tangential.x;
					tangential.x = -tangential.y;
					tangential.y = newy;
					tangential *= p.mode.gravity.tangentialAccel;

					tmp = radial + tangential + _particleDef->mode.gravity.gravity;
					tmp *= deltaTime;
					p.mode.gravity.dir += tmp;