Question

I have been trying to use vectors to move objects at angles and I did get it working, however, when I try to move an object to a specific point it gets there and then disappears. In my code I test if within the next step if it will reach it’s destination and if it will, I snap it to the destination.

void Dot::moveToVector(Vector& vec)
{
    float dx;
    float dy;

    dx = vec.X - position.X;
    dy = vec.Y - position.Y;

    Vector distanceVec(dx, dy);

    float distance = distanceVec.Length();

    float scale;

    scale = speed / distance;

    velocity.X = dx * scale;
    velocity.Y = dy * scale;

    if(velocity.X < scale || velocity.Y < scale)
    {
        velocity.X = 0;
        velocity.Y = 0;

        position.X = vec.X;
        position.Y = vec.Y;
    }

    move();
}

When I debugged it, one frame after it snaps into position, the x and y values of the position = -nan(0x400000).

Answer 1

scale = speed / distance;

If distance == 0 what do you think will happen?