void updateParticle(ParticleManager& sourceManager, int sourceId, ParticleManager& destinationManager, int destinationId) {
destinationManager.getParticleMass(destinationId) = sourceManager.getParticleMass(sourceId);
destinationManager.getParticlePosition(destinationId) = sourceManager.getParticlePosition(sourceId);
destinationManager.getParticleVelocity(destinationId) = sourceManager.getParticleVelocity(sourceId);
destinationManager.getParticleForce(destinationId) = sourceManager.getParticleForce(sourceId);
destinationManager.getParticleColor(destinationId) = sourceManager.getParticleColor(sourceId);
}
// 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);
}
// Create a particleGraph
ParticleGraph createString(glm::vec2 A, glm::vec2 B, glm::vec3 color, glm::vec3 headColor, uint32_t discFactor, ParticleManager& particleManager) {
glm::vec2 AB = B - A;
glm::vec2 step = glm::vec2(AB[0]/discFactor, AB[1]/discFactor);
glm::vec2 position = A;
float mass = 1.f;
ParticleGraph graph;
unsigned int id = 0;
for(int i = 0; i < discFactor + 1; ++i) {
id = particleManager.addParticle(mass, position, glm::vec2(0.f, 0.f), glm::vec2(0.f, 0.f), color, ParticleManager::Type::P_SNAKE);
if(id != 0) {
std::pair<unsigned int, unsigned int> pair (id, id - 1);
graph.push_back(pair);
}
else if(id == discFactor) {
std::pair<unsigned int, unsigned int> pair (id, 0);
graph.push_back(pair);
}
position += step;
}
particleManager.getParticleColor(0) = headColor;
return graph;
}
// Copy a particle
int copyParticle(ParticleManager& sourceManager, ParticleManager& destinationManager, int id) {
int newId = destinationManager.addParticle(sourceManager.getParticleMass(id),
sourceManager.getParticlePosition(id),
sourceManager.getParticleVelocity(id),
sourceManager.getParticleForce(id),
sourceManager.getParticleColor(id));
return newId;
}
// 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;
}