I cannot get a smooth jump

Question

This is my code for handling movement:

void Movement(const Uint8 *keyboardHandle)
{
    if (keyboardHandle[SDL_SCANCODE_SPACE] && yes == 0)
    {
        velY = -20;
        yes = 100;
    }

    player.posY += velY;
    player.posY += g;
    
    if (player.posY >= SCREEN_HEIGHT - player.width / 2)
    {
        player.posY = SCREEN_HEIGHT - player.width / 2;
    }

    velY = 0;

    // Timer
    yes--;
    if(yes <= 0)
    {
        yes = 0;
    }
}

It is basic, but all works besides the jump, it just teleport the player upwards. I tried handling the gravity before the jump, not working. I tried making a for loop to increment the Y velocity, still not working. Any ideas?

Answer 1

Solved it.

void Movement(const Uint8 *keyboardHandle)
{
    if (keyboardHandle[SDL_SCANCODE_SPACE] && yes == 0)
    {
        g = -10;
        yes = 50;
    }

    player.posX += velX;
    player.posY += g;
    
    if (player.posY >= SCREEN_HEIGHT - player.width / 2)
    {
        player.posY = SCREEN_HEIGHT - player.width / 2;
    }

    // Jump force
    g++;
    if(g >= 5)
    {
        g = 5;
    }

    // Jump timer
    yes--;
    if(yes <= 0)
    {
        yes = 0;
    }
}

g is by default 5 which would be the gravity, and we just smoothly invert it for a jump.