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Amélioration de l'algo pour la force d'attraction

This commit is contained in:
Mattéo Delabre 2016-03-08 17:42:45 +01:00
parent 733d4540ce
commit d89ac6d0e5
1 changed files with 9 additions and 5 deletions
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14
engine.cpp
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@ -67,10 +67,10 @@ void Engine::update(float delta) {
for (int i = 0; i < balls.size(); i++) { for (int i = 0; i < balls.size(); i++) {
sf::Vector2f forces(0, 0); sf::Vector2f forces(0, 0);
// ajout de la force de gravité // force de gravité
forces += sf::Vector2f(0, Engine::GRAVITY); forces += sf::Vector2f(0, Engine::GRAVITY);
// déplacement de la balle // déplacement de la balle après appui sur les touches de direction
if (goLeftKey) { if (goLeftKey) {
forces += sf::Vector2f(-Engine::MOVE, 0); forces += sf::Vector2f(-Engine::MOVE, 0);
} }
@ -79,14 +79,18 @@ void Engine::update(float delta) {
forces += sf::Vector2f(Engine::MOVE, 0); forces += sf::Vector2f(Engine::MOVE, 0);
} }
// force d'attraction // force d'attraction entre les balles et les blocs
for (int j = 0; j < balls.size(); j++) { for (int j = 0; j < balls.size(); j++) {
if (i != j) { if (i != j && balls[i].getCharge() && balls[j].getCharge()) {
sf::Vector2f attraction(balls[i].getPosition() - balls[j].getPosition()); sf::Vector2f attraction(balls[i].getPosition() - balls[j].getPosition());
float distanceSquared = attraction.x * attraction.x + attraction.y * attraction.y; float distanceSquared = attraction.x * attraction.x + attraction.y * attraction.y;
// normalisation du vecteur direction qui porte la force d'attraction
attraction /= std::sqrt(distanceSquared); attraction /= std::sqrt(distanceSquared);
attraction *= Engine::ATTRACTION * ((balls[i].getCharge() * balls[j].getCharge()) / distanceSquared); attraction *= Engine::ATTRACTION * (
(balls[i].getCharge() * balls[j].getCharge()) /
distanceSquared
);
forces += attraction; forces += attraction;
} }