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We saw that with Input.get_vector,
we can get a direction vector.

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Let's look at what
the function outputs for us.

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This little demo shows
the output of the function.

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If we don't press anything,
we get a vector of length zero.

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Now, if I press up,
I get a vector pointing up.

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If I press D, it points to the right, and
with W and D it points to the top right.

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Now the important part here is
how you can see

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the length of the vector
is always the same.

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To be precise, it's limited to one.

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This makes it so
whether we're trying to move vertically,

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horizontally or diagonally,

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the ship or whatever you are moving
will move at a consistent speed.

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This is the purpose of a direction vector.

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Now, when you don't have any input,
the vector has a length of zero.

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And the math with that works similar
to what you learned at school.

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Zero times anything is equal to zero.

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A vector two of length zero, times
anything is a vector two of length zero.

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As a result, the character will have
no velocity and not move.

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Or the ship in our case.

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I want to show you another thing.

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This function gives us
support for analog input.

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You can see the gamepad in the top right.

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Notice how when I move the joystick,
the vector changes direction and length,

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and this time it can be
a bit shorter than before.

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Analog input is just that.

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It's the ability to control the length
of our direction vector

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to make the ship move faster or slower.

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And Input.get_vector will take
care of that for you.

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So you can get both keyboard input support

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like this,
or you can get gamepad input support.