Lunar Lander

.lua

--# Main
-- Lunar Lander
function setup()
    displayMode(FULLSCREEN)
    instances = {}
    ship = Ship(WIDTH/2,HEIGHT/2)
    table.insert(instances,ship)
    leftbutton = Button(100,200,"left")
    table.insert(instances,leftbutton)
    rightbutton = Button(300,200,"right")
    table.insert(instances,rightbutton)
    thrustbutton = Button(900,200,"thrust")
    table.insert(instances,thrustbutton)
end

function dist(o1,o2)
    return math.sqrt(math.pow((o1.x-o2.x),2)+math.pow((o1.y-o2.y),2))
end

function draw()
    background(40, 40, 50)
    strokeWidth(5)
    for i,o in ipairs(instances) do
        o:draw()
    end
end
--# Ship
Ship = class()

function Ship:init(x, y)
    self.x = x
    self.y = y
    self.direction = 0
    self.speed = 1
end

function Ship:thrust()
    
end

function Ship:draw()
    local direction = (90+self.direction)*(2*math.pi)/360
    self.x = self.x + self.speed*math.cos(direction)
    self.y = self.y + self.speed*math.sin(direction)
    pushMatrix()
    translate(self.x,self.y)
    rotate(self.direction)
    sprite("Tyrian Remastered:Ship C",0,0)
    popMatrix()
end

--# Button
Button = class()

function Button:init(x,y,action)
    self.x = x
    self.y = y
    self.action = action
    self.size = 120
    self.active = false
end

function Button:withinDistance()
    if CurrentTouch.state == ENDED then return end
    if dist(self,CurrentTouch)<self.size/2 then
        self.active = true
        return true
    else
        self.active = false
        return false
    end
end

function Button:draw()
    if self.action == "left" then
        fill(255, 0, 0, 255)
        if self:withinDistance() then
            ship.direction = ship.direction + 1
        end
    elseif self.action == "right" then
        fill(229, 255, 0, 255)
        if self:withinDistance() then
            ship.direction = ship.direction - 1
        end
    elseif self.action == "thrust" then
        fill(0, 255, 19, 255)
        if self:withinDistance() then
            ship:thrust()
        end
    end
    ellipse(self.x,self.y,self.size)
end

function Button:touched(touch)

end