Gravity using CircleShape SFML - c++

Question

I am currently trying to set gravity for a split-screen game. The problem with my game is that the circles will rise once W or Up is pressed but the gravity does not seem to apply to them. Also when I move them left or right whilst in the air they disappear until I press W or Up again.
sf::Vector2f position(screenDimensions.x /2, screenDimensions.y / 2);
sf::Vector2f position2(position);
sf::Clock clock;
float moveSpeed = 0.5f , jumpSpeed = 0.3f;
while(Game.isOpen())
{
clock.restart();
sf::Event Event;
while(Game.pollEvent(Event))
{
switch(Event.type)
{
case sf::Event::Closed:
Game.close();
break;
case sf::Event::KeyPressed:
if(Event.key.code == sf::Keyboard::Escape)
Game.close();
break;
}
}
if(sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
{
velocity.x = moveSpeed;
circ1.move(velocity.x, velocity.y);
}
else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
{
velocity.x = -moveSpeed;
circ1.move(velocity.x, velocity.y);
}
else
velocity.x = 0;
if(sf::Keyboard::isKeyPressed(sf::Keyboard::D))
{
velocity.x = moveSpeed;
circ2.move(velocity.x, velocity.y);
}
else if(sf::Keyboard::isKeyPressed(sf::Keyboard::A))
{
velocity.x = -moveSpeed;
circ2.move(velocity.x, velocity.y);
}
else
velocity.x = 0;
if(sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
{
velocity.y = -jumpSpeed;
circ1.move(velocity.x, velocity.y);
}
else
if(sf::Keyboard::isKeyPressed(sf::Keyboard::W))
{
velocity.y = -jumpSpeed;
circ2.move(velocity.x, velocity.y);
}
if (circ1.getPosition().x + 10 >= view1.getSize().x / 2)
position.x = circ1.getPosition().x + 10;
else
position.x = view1.getSize().x / 2;
if (circ2.getPosition().x + 10 >= view2.getSize().x / 2)
position2.x = circ2.getPosition().x + 10;
else
position2.x = view2.getSize().x / 2;
if (circ1.getPosition().y + circ1.getRadius() < groundHeight || velocity.y > 0)
{
velocity.y += Gravity;
}
else
{
circ1.setPosition(circ1.getPosition().x, groundHeight - circ1.getRadius());
velocity.y = 0;
}
view1.setCenter(position);
view2.setCenter(position2);
Game.setView(view1);
Game.draw(bImage);
Game.draw(circ1);
Game.draw(circ2);
Game.setView(view2);
Game.draw(bImage);
Game.draw(circ2);
Game.draw(circ1);
Game.display();
Game.clear();
}
}
Help is appreciated Thank you.

Answer 1

If you want "jumping" per se, then you need to keep the user from jumping while already in the air. This could be accomplished by creating a bool jumping=false; at the beginning and then setting jumpingto true when a jump is initialized. Then, each time the program loops, if (jumping && floor.getGlobalBounds().intersects(circ1) || circ.getPosition().y<0){jumping=false;velocity.y=0;}.
Otherwise, you might try changing
if (circ1.getPosition().y + circ1.getRadius() < groundHeight || velocity.y > 0)
{
velocity.y += Gravity;
}
to
if (circ1.getPosition().y + circ1.getRadius() > groundHeight || velocity.y > 0)
{
velocity.y += Gravity;
}