Movement based off rotation.

[Mincher]

Hi i'm trying to make a 2d game where i need the player's x and y positions to update based on the angle of rotation when they move. It's been a good few years since i even thought of programming and have forgotten the math.

Any help would be much appreciated!

[javatier]

You could have two Variables one called xPos and yPos. It seems to be a very common way to get to set the players position.

[Mincher]

Yes, but i want to move forward the way the sprite is facing rather than straight 4 directional movement.

I think it has something to do with storing the x and y positions and calculating the sin and cos of the angles but i'm jiggered if i can remember how it goes together.

[Mincher]

Got it now

[Phaelax]

step = amount the player moves each step
x += sin(angle)*step
y += cos(angle)*step

I might have flip-flop the sin and cos. If the rotation seems backwards, just swap them.