Love2D, LUA Tween resetting -
i have problem tweening. using tween.lua move character left or right when button held. on release player returns middle. tweening works when character goes either left or right but, reason when has go middle character warps there , not tween. suspect either base x overriding or not resseting @ right moment. here code:
--local variables local lg = love.graphics local lk = love.keyboard function player:load(arg) --player load function. called when loaded. self.img = lg.newimage(currentpimg) playerwidth = player.img:getwidth() --gets player image width , sets variable self.mid = width/2 - playerwidth/2 self.left = 100 - playerwidth/2 self.right = width - 100 - playerwidth/2 self.x = player.mid self.y = height-150 self.speed = 0.04 gomid = tween.new(player.speed , player, {x=player.mid}, 'linear') goleft = tween.new(player.speed , player, {x=player.left}, 'linear') goright = tween.new(player.speed , player, {x=player.right}, 'linear') end function player:update(dt) --player update function. called each frame, passes dt (delta time) playerwidth = player.img:getwidth() --gets player image width , sets variable if leftstarted , not isleft goleft:reset() leftstarted = false end if rightstarted , not isright goright:reset() rightstarted = false end if midstarted , not ismid gomid:reset() midstarted = false end if ismid --if true action gomid:update(dt) midstarted = true end if isright --if true action goright:update(dt) rightstarted = true end if isleft --if true action goleft:update(dt) leftstarted = true end if lk.isdown("left", "a") , not isright --this check needs done since code executed first time. if not check weird stuff happens isleft = true isright, ismid = false elseif lk.isdown("right", "d") --checks if button down , returns true if isright = true isleft, ismid = false else -- if nothing down resets player mid , variables false isleft, isright = false ismid = true end end function player:draw(dt) --draw function. called each frame, passes dt (delta time) lg.draw(player.img, player.x, player.y) --draws player image @ x , y end
working version of code
so, after messing lot code, can present following you:
player = { } --required table thing --local variables local lg = love.graphics local lk = love.keyboard function player:load(arg) --player load function. called when loaded. self.img = lg.newimage(currentpimg) playerwidth = player.img:getwidth() --gets player image width , sets variable self.mid = width/2 - playerwidth/2 self.left = 100 - playerwidth/2 self.right = width - 100 - playerwidth/2 self.x = player.mid self.y = height-150 self.speed = 0.5 gomid = tween.new(player.speed , player, {x=player.mid}, 'linear') goleft = tween.new(player.speed , player, {x=player.left}, 'linear') goright = tween.new(player.speed , player, {x=player.right}, 'linear') end function player:update(dt) --player update function. called each frame, passes dt (delta time) playerwidth = player.img:getwidth() --gets player image width , sets variable if leftstarted , not isleft gomid = tween.new(player.speed , player, {x=player.mid}, 'linear') leftneedsreset = true leftstarted = false end if rightstarted , not isright gomid = tween.new(player.speed , player, {x=player.mid}, 'linear') rightneedsreset = true rightstarted = false end if ismid --if true action gomid:update(dt) end if isright --if true action if rightneedsreset goright:reset() rightneedsreset = false end goright:update(dt) rightstarted = true end if isleft --if true action if leftneedsreset goleft:reset() leftneedsreset = false end goleft:update(dt) leftstarted = true end if lk.isdown("left", "a") , not isright --this check needs done since code executed first time. if not check weird stuff happens isleft = true isright, ismid = false, false elseif lk.isdown("right", "d") --checks if button down , returns true if isright = true isleft, ismid = false, false else -- if nothing down resets player mid , variables false isleft, isright = false, false ismid = true end end function player:draw(dt) --draw function. called each frame, passes dt (delta time) lg.draw(player.img, player.x, player.y) --draws player image @ x , y end this sort of achieves think wanted (the player smoothly moving center), still don't think solution.
did made new motion appropriate starting point whenever player needs start moving towards center, , delayed resetting of directional motions until necessary, because makes player jump starting point.
observations
i have noticed few things while working code.
the first 1 tried give value multiple variables. far know, doesn't work way in lua. in order have write this:
isleft, isright = false, false
instead of this:
isleft, isright = false
also thing took while me notice while debugging have wrote resetting parts of directions in different order updating parts. wouldn't consider habit unless have got strong reasons way.
suggestions
in opinion library isn't suited task (although don't know well, first time using while debugging code). done built in functionality of language , framework itself. have variable keeps track of current position, , change continuously towards direction of pressed button until limit, , dragging center when keys released.
i haven't tested code, written blindly, might this:
if love.keyboard.isdown("left") if currentposition > middleposition - movementlimit currentposition = currentposition - 20 * dt end elseif love.keyboard.isdown("right") if currentposition < middleposition + movementlimit currentposition = currentposition + 20 * dt end else if currentposition < middleposition currentposition = currentposition + 20 * dt elseif currentposition > middleposition currentposition = currentposition - 20 * dt end end ps.:another thing wouldn't mind if keep wording of comments in source code between bounds of taste. [khm.. debugging.lua : line 7. khm..]
i hope succeed project! luck!
Comments
Post a Comment