Hello everyone, I have a problem with bottom collision detection in my project.
I have a function that checks if the bottom of the character collides with a platform, it almost work as wanted, but there is a problem, actually it works only with some platforms but will fail with others.
See the screens below.
Working : (https://i.ibb.co/8YvzhBY/Ok.png) (https://ibb.co/DrcGqbr)
Not working :(https://i.ibb.co/7C5G43n/not-ok.png) (https://ibb.co/H4srdct)
On the first screenshot, we can see the collisions fits perfectly, but in the second screen the character is overlapping the platform.
Here's the code for bottom collision detection :
bool Character::isBottomColliding(Platform *platforms)
{
int i;
sf::FloatRect characterRect;
sf::FloatRect platformRect;
characterRect = getRect();
for(i = 0; i < LEVEL_MAX_PLATFORMS; i++)
{
platformRect = platforms[i].getRect();
if(characterRect.left + characterRect.width >= platformRect.left && characterRect.left <= platformRect.left + platformRect.width && characterRect.top + characterRect.height >= platformRect.top)
{
isGrounded = true;
isJumping = false;
return true;
}
}
return false;
}
The update function :
void update(Level *level, Character *character)
{
if(character->falling() && !character->isBottomColliding(level->getPlatforms()))
{
character->fall(); //This function is moving character down to simulate gravity
}
character->move();
}
I don't understand why it works with the first platforms but not with the other one.
Sorry if my english was bad, this is not my native language.
EDIT : It works fine when gravity is set to 1
void Character::fall()
{
sprite.setPosition(getRect().left, getRect().top + gravity);
isFalling = true;
isGrounded = false;
}
EDIT 2: I found that when the platform's Y position modulus (%) the gravity equals 0, there is no problem
if platformRect.top % gravity == 0 ==> No collision problems