int main()
{
cout << "Current speed = " << GetSpeed() << endl;
cout << "Max speed = " << GetMaxSpeed() << endl
<< "Min speed = " << GetMinSpeed() << endl;
}
void ImplementSelection() {
switch (selection) {
case 1:
SetSpeed();
cout << "\nSpeed in MPH = " << speed << endl;
break;
case 2:
GetSelectedSpeed();
break;
case 3:
cout << "\nMAX Speed = " << GetMaxSpeed() << endl;
break;
case 4:
cout << "\nMIN Speed = " << GetMinSpeed() << endl;
break;
}
}
int main() {
// display initial values for variables
cout << "My Super Bicycle Program\n" << "Initial values follow...\n"
<< "Speed: " << speed << "\tMINspeed: " << MINspeed
<< "\tMAXspeed: " << MAXspeed << endl;
// int x;
// cout << "x = " << x << endl;
// MINspeed = 15;
SetSpeed();
cout << "Current speed = " << GetSpeed() << "\tMAXspeed = "
<< GetMaxSpeed() << "\tMINspeed = " << GetMinSpeed() << endl;
// use overloaded function
int sp = { 33 };
SetSpeed(sp);
cout << "Updated current speed is " << GetSpeed() << "\n\n";
}
void PhysicsSystem::Update(float _dt)
{
for (auto it = m_entityMap.begin(); it != m_entityMap.end(); ++it)
{
Entity* e = it->second;
if (e->GetState() != Entity::ALIVE)
continue;
auto collision = e->GetComponent<CollisionComponent>();
auto stats = e->GetComponent<CollisionStatsComponent>();
auto position = e->GetComponent<PositionComponent>();
auto velocity = e->GetComponent<VelocityComponent>();
auto rotation = e->GetComponent<RotationComponent>();
b2Body* b2Body = collision->GetBody();
// Update position, velocity and rotation after the components
if (position && rotation)
{
const b2Vec2 b2Pos = b2Vec2(position->GetPosition().x, position->GetPosition().y);
if (collision->GetBody()->GetPosition().x != b2Pos.x || collision->GetBody()->GetPosition().y != b2Pos.y || collision->GetBody()->GetAngle() != rotation->GetRotation().z)
collision->GetBody()->SetTransform(b2Pos, rotation->GetRotation().z);
}
else if (position)
{
const b2Vec2 b2Pos = b2Vec2(position->GetPosition().x, position->GetPosition().y);
if (collision->GetBody()->GetPosition().x != b2Pos.x || collision->GetBody()->GetPosition().y != b2Pos.y)
collision->GetBody()->SetTransform(b2Pos, collision->GetBody()->GetAngle());
}
else if (rotation)
{
if (collision->GetBody()->GetAngle() != rotation->GetRotation().z)
collision->GetBody()->SetTransform(collision->GetBody()->GetPosition(), rotation->GetRotation().z);
}
if (velocity)
{
const b2Vec2 b2Velocity = b2Vec2(velocity->m_velocity.x, velocity->m_velocity.y);
if (collision->GetBody()->GetLinearVelocity().x != b2Velocity.x || collision->GetBody()->GetLinearVelocity().y != b2Velocity.y)
collision->GetBody()->SetLinearVelocity(b2Velocity);
}
// Update velocity min/max and deacceleration
if (velocity && stats)
{
if (b2Body->GetLinearVelocity().y <= 0.5f && b2Body->GetLinearVelocity().y >= -0.5f)
b2Body->SetLinearVelocity(b2Vec2(b2Body->GetLinearVelocity().x, -3.0f));
float speed = b2Body->GetLinearVelocity().Length();
// Speed cant be 0
if (speed == 0)
continue;
// Set speed between min/max
if (speed < stats->GetMinSpeed())
{
b2Body->SetLinearVelocity(b2Vec2((b2Body->GetLinearVelocity().x / speed) * stats->GetMinSpeed(), (b2Body->GetLinearVelocity().y / speed) * stats->GetMinSpeed()));
}
if (speed > stats->GetMaxSpeed())
{
b2Body->SetLinearVelocity(b2Vec2((b2Body->GetLinearVelocity().x / speed) * stats->GetMaxSpeed(), (b2Body->GetLinearVelocity().y / speed) * stats->GetMaxSpeed()));
}
// Deaccelerate
if (speed > stats->GetMaxDampingSpeed())
{
float newSpeed = speed - (stats->GetDampingAcceleration() * _dt);
if (speed < stats->GetMaxDampingSpeed())
newSpeed = stats->GetMaxDampingSpeed();
b2Body->SetLinearVelocity(b2Vec2((b2Body->GetLinearVelocity().x / speed) * newSpeed, (b2Body->GetLinearVelocity().y / speed) * newSpeed));
}
}
}
// Simulate worlds physics
m_b2World->Step(_dt, VELOCITYITERATIONS, POSITIONITERATIONS);
// Update position, velocity and rotation components
for (auto it = m_entityMap.begin(); it != m_entityMap.end(); ++it)
{
Entity* e = it->second;
if (e->GetState() != Entity::ALIVE)
continue;
auto collision = e->GetComponent<CollisionComponent>();
auto position = e->GetComponent<PositionComponent>();
auto velocity = e->GetComponent<VelocityComponent>();
auto rotation = e->GetComponent<RotationComponent>();
b2Body* b2Body = collision->GetBody();
collision->ResetCollisions();
if (position)
{
b2Vec2 b2Pos = b2Body->GetPosition();
position->SetPosition(VECTOR3(b2Pos.x, b2Pos.y, position->GetPosition().z));
}
if (velocity)
{
b2Vec2 b2Velocity = b2Body->GetLinearVelocity();
velocity->m_velocity = VECTOR3(b2Velocity.x, b2Velocity.y, velocity->m_velocity.z);
}
if (rotation)
{
QUAT rot = rotation->GetRotation();
//rotation->SetRotation(QUAT(rot.x, rot.y, b2Body->GetAngle(), rot.w));
}
}
// Do collisions checks
for (b2Contact* contact = m_b2World->GetContactList(); contact; contact = contact->GetNext())
{
if (!contact->IsTouching())
continue;
b2Fixture* fixtureA = contact->GetFixtureA();
b2Fixture* fixtureB = contact->GetFixtureB();
Entity* entityA = 0;
Entity* entityB = 0;
for (auto it = m_entityMap.begin(); it != m_entityMap.end(); ++it)
{
Entity* e = it->second;
if (e->GetState() != Entity::ALIVE)
continue;
if (!entityA && e->GetComponent<CollisionComponent>()->HasBody(fixtureA->GetBody()))
entityA = e;
else if (!entityB && e->GetComponent<CollisionComponent>()->HasBody(fixtureB->GetBody()))
entityB = e;
if (entityA && entityB)
break;
}
if (entityA && entityB)
{
CollisionContact collisionContact = CollisionContact(contact, fixtureA, fixtureB, entityB->GetId());
entityA->GetComponent<CollisionComponent>()->CollidingWith(collisionContact);
collisionContact = CollisionContact(contact, fixtureB, fixtureA, entityA->GetId());
entityB->GetComponent<CollisionComponent>()->CollidingWith(collisionContact);
}
}
}
