function love.load()
    --Object = require "classic"
    require "cjrcle"
    windowwidth = 1000
    windowheight = 1000
    love.graphics.setBackgroundColor(1, 1, 1)
    sucess = love.window.setMode(windowwidth, windowheight) -- what does this line do? ... will work but the circle is offset

    ctheta = math.pi/2
    x = 0
    y = 0

    startposX = -500
    discr = 50
    hr = 10

    speed = 1

    thrown = false -- a variable to check if the hammer has been let go

    -- hammer position
    hxpos = startposX + discr*math.cos(math.pi/2)
    hypos = y - discr*math.sin(math.pi/2)
    rv = 1 -- rotational velocity
end


function love.update(dt)

    ctheta = ctheta - rv*math.pi*dt
    if speed < 10 then
        startposX = startposX + speed
    end


    hxpos = startposX + discr*math.cos(ctheta) -- this snippet of code calculates the hammer position for the next frame
    hypos = y - discr*math.sin(ctheta)
    -- once the hammer has been thrown you need to stop performing this calculation, and instead do the one that you currently have in love.keypressed
    if thrown == true then

        hxpos = hxpos + 1/math.tan(ctheta*dt) -- using the cotangent seems to work better than the secant... or the tangent
        hypos = hypos + 1/math.tan(ctheta*dt) -- i think it will always go at a 45 degree angle
        speed = 0
    else
        hxpos = startposX + discr*math.cos(ctheta)
        hypos = y - discr*math.sin(ctheta)
    end

    if startposX > 0 then
      startposX = 0
    end
    if rv < 12 and thrown == false then
      rv = rv*1.01 -- the rotational velocity is always being updated at every frame
    end
end
--[[
  equation of tangent line y = -x + 50*math.sqrt(2)
]]

function love.keypressed(key)
    if key == "space" and startposX < 0 then
        thrown = true

        speed = 0
    end
end

function love.draw()
    --love.graphics.push()
    love.graphics.translate(windowwidth/2, windowheight/2)



    love.graphics.setColor(0, 1, 0)
    cjrcle(discr, startposX, 0, 32)

    --blue circle
    love.graphics.setColor(0, 0, 1) -- blue paint

    cjrcle(10, hxpos, hypos, 16)

    love.graphics.setColor(0, 0, 0) -- black
    love.graphics.setLineWidth(.5)
    love.graphics.line(50*math.sqrt(2), 0, 0, -50*math.sqrt(2))
    love.graphics.setColor(1,0,0) -- red
    love.graphics.setLineWidth(.3)
    love.graphics.line(50*math.tan(math.pi/4), 0, 0, -50*math.tan(math.pi/4)) -- tan π/4 = 1

    love.graphics.line(0, 25*math.sqrt(3) + math.sqrt(1875)/3, 0, 25*math.sqrt(3) + math.sqrt(1875)/3)


end