// Add attractive force
void addAttractiveForce(ParticleManager& foodManager, ParticleManager& snakeManager) {
int attractiveCoeff = 50;
glm::vec2 attractiveForce = foodManager.getParticlePosition(0) - snakeManager.getParticlePosition(0);
float d = glm::length(attractiveForce);
attractiveForce = glm::normalize(attractiveForce);
// Plus on divise et plus c'est petit : pluattractivecoeff augmente et mois l'attraction est forte au loin
snakeManager.addForceToParticle(0, glm::vec2(attractiveForce[0]/(attractiveCoeff*d), attractiveForce[1]/(attractiveCoeff*d)));
}
// Add repulsive force
void addRepulsiveForce(ParticleManager& repulsiveManager, ParticleManager& snakeManager) {
if(repulsiveManager.getCount() > 0) {
for(int i = 0; i < snakeManager.getCount(); ++i) {
for(int j = 0; j < repulsiveManager.getCount(); ++j) {
glm::vec2 repulse = snakeManager.getParticlePosition(i) - repulsiveManager.getParticlePosition(j);
float d = glm::length(repulse);
repulse = glm::normalize(repulse);
int repulsiveCoeff = 40;
if(d < 0.2) {
// Plus on divise et plus c'est petit : pluattractivecoeff augmente et mois l'attraction est forte au loin
snakeManager.addForceToParticle(i, glm::vec2(repulse[0]/(repulsiveCoeff*d), repulse[1]/(repulsiveCoeff*d)));
}
}
}
}
}
void ConstantForce::apply(ParticleManager& pm) {
for(int i = 0; i < pm.getCount(); ++i) {
pm.addForceToParticle(i, this->getForce());
}
}