// Check if the snake is outside
bool isOutside(ParticleManager& snakeManager) {
for(int i = 0; i < snakeManager.getCount(); ++i) {
//Right
if(snakeManager.getParticleX(i) >= 1.f) {
return true;
}
// Left
if(snakeManager.getParticleX(i) <= -1.f) {
return true;
}
// Up
if(snakeManager.getParticleY(i) >= 1.f) {
return true;
}
// Down
if(snakeManager.getParticleY(i) <= -1.f) {
return true;
}
}
return false;
}
// Check collision between snake and food
int checkFoodCollision(ParticleGraph& snakeGraph, ParticleManager& snakeManager, ParticleManager& foodManager, ParticleManager& fireworkManager, float step, int init) {
for(int i = init; i < foodManager.getCount(); ++i) {
if(foodManager.getParticleX(i) - step * foodManager.getParticleMass(i) <= snakeManager.getParticleX(0)
&& snakeManager.getParticleX(0) <= foodManager.getParticleX(i) + step * foodManager.getParticleMass(i)
&& foodManager.getParticleY(i) - step * foodManager.getParticleMass(i) <= snakeManager.getParticleY(0)
&& snakeManager.getParticleY(0) <= foodManager.getParticleY(i) + step* foodManager.getParticleMass(i)) {
fireworkManager.addCircleParticlesAtPosition(3, snakeManager.getParticlePosition(0), snakeManager.getParticleColor(1), 25);
addParticletoSnake(snakeGraph, i, foodManager, snakeManager);
foodManager.addRandomParticle(snakeManager.getCount());
return i;
}
}
return -1;
}
// 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)));
}
}
}
}
}
// Check collision between snake and snake
int checkSnakeCollision(ParticleManager& snakeManager, ParticleManager& foodManager, float step, int init) {
for(int i = init; i < foodManager.getCount() - 1; ++i) {
if(foodManager.getParticleX(i) - step * foodManager.getParticleMass(i) <= snakeManager.getParticleX(0)
&& snakeManager.getParticleX(0) <= foodManager.getParticleX(i) + step * foodManager.getParticleMass(i)
&& foodManager.getParticleY(i) - step * foodManager.getParticleMass(i) <= snakeManager.getParticleY(0)
&& snakeManager.getParticleY(0) <= foodManager.getParticleY(i) + step* foodManager.getParticleMass(i)) {
return i;
}
}
return -1;
}
// Add a particle to the Snake
void addParticletoSnake(ParticleGraph& graph, int id, ParticleManager& foodManager, ParticleManager& snakeManager) {
id = snakeManager.addParticleToHead(foodManager.getParticleMass(id),
foodManager.getParticlePosition(id),
foodManager.getParticleVelocity(id),
foodManager.getParticleForce(id),
snakeManager.getHeadColor());
foodManager.clear();
std::pair<unsigned int, unsigned int> pair (id, snakeManager.getCount() - 2);
graph.push_back(pair);
snakeManager.getParticleColor(1) = snakeManager.getParticleColor(2);
}
void ConstantForce::apply(ParticleManager& pm) {
for(int i = 0; i < pm.getCount(); ++i) {
pm.addForceToParticle(i, this->getForce());
}
}