Animation.lua

Animation = Class{}

function Animation:init(params)
    self.texture = params.texture
    self.frames = params.frames
    self.interval = params.interval or .05
    self.timer = 0
    self.currentFrame = 1
end

function Animation:getCurrentFrame()
    return self.frames[self.currentFrame]
end

function Animation:restart()
    self.timer = 0
    self.currentFrame = 1
end

function Animation:update(dt)
    self.timer = self.timer + dt

    if #self.frames == 1 then 
        return self.currentFrame
    else
        while self.timer > self.interval do
            self.timer = self.timer - self.interval
            self.currentFrame = (self.currentFrame + 1) % (#self.frames + 1)
            if self.currentFrame == 0 then
                self.currentFrame = 1
            end
        end
    end

end