love.wheelmoved
Available since LÖVE 0.10.0 |
This function is not supported in earlier versions. |
Callback function triggered when the mouse wheel is moved.
Function
Synopsis
love.wheelmoved( x, y )
Arguments
number x
- Amount of horizontal mouse wheel movement. Positive values indicate movement to the right.
number y
- Amount of vertical mouse wheel movement. Positive values indicate upward movement.
Returns
Nothing.
Examples
local text = "" function love.wheelmoved(x, y) if y > 0 then text = "Mouse wheel moved up" elseif y < 0 then text = "Mouse wheel moved down" end end function love.draw() love.graphics.print(text, 10, 10) end
Smooth scrolling
function love.load() posx, posy = love.graphics.getWidth() * 0.5, love.graphics.getHeight() * 0.5 velx, vely = 0, 0 -- The scroll velocity end function love.draw() love.graphics.rectangle( 'line', posx, posy, 50, 50 ) end function love.update( dt ) posx = posx + velx * dt posy = posy + vely * dt -- Gradually reduce the velocity to create smooth scrolling effect. velx = velx - velx * math.min( dt * 10, 1 ) vely = vely - vely * math.min( dt * 10, 1 ) end function love.wheelmoved( dx, dy ) velx = velx + dx * 20 vely = vely + dy * 20 end
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