Difference between revisions of "love.wheelmoved"
m (→Smooth scrolling: Fixed reduction in vely so that it isn't reduced by velx) |
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-- Gradually reduce the velocity to create smooth scrolling effect. | -- Gradually reduce the velocity to create smooth scrolling effect. | ||
− | velx = velx - velx * math.min(dt * 10, 1) | + | velx = velx - velx * math.min( dt * 10, 1 ) |
− | vely = vely - vely * math.min(dt * 10, 1) | + | vely = vely - vely * math.min( dt * 10, 1 ) |
end | end | ||
Line 60: | Line 60: | ||
[[Category:Callbacks]] | [[Category:Callbacks]] | ||
{{#set:Description=Callback function triggered when the mouse wheel is moved.}} | {{#set:Description=Callback function triggered when the mouse wheel is moved.}} | ||
− | {{#set:Subcategory= | + | {{#set:Subcategory=Mouse}} |
== Other Languages == | == Other Languages == | ||
{{i18n|love.wheelmoved}} | {{i18n|love.wheelmoved}} |
Latest revision as of 22:29, 7 March 2019
Available since LÖVE 0.10.0 |
This function is not supported in earlier versions. |
Callback function triggered when the mouse wheel is moved.
Contents
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
See Also
Other Languages
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More info