How to point an image toward the cursor?

[Ethan-Taylor]

So do I measure the angle based on x and y of my sprite (image) and the x and y of the cursor?
Also I would like it so when you press the up key the character goes toward the mouse cursor.

Also with all the keys too, so if you're pointing 90d the "A" key would make you go down.

Thanks.

[micha]

You can calculate the angle like this:

Code: Select all

local dx = mouseX-playerX
local dy = mouseY-playerY
local angle = math.atan2(dy,dx)

This angle can then be used in the draw-call to rotate the image.

To make the movement towards the mouse, you need some trigonometry (put the calculation of the angle before this code):

Code: Select all

if love.keyboard.isDown('w') then
  playerX = playerX + velocity * dt * math.cos(angle)
  playerY = playerY + velocity * dt * math.sin(angle)
end