Code 14a - Examples

--# Main
-- Code 14a - Examples

-- Bruce Elliott
-- May 2013

-- Code in this program was inspired by
-- Programming in Lua - Chapter 9

-- Use this function to perform your initial setup
function setup()

    co = coroutine.create(
        function()
            print("hi!")
        end)

    print("co uses an anonymous function")
    print("print: ", co)
    print("status: ", coroutine.status(co))
    print("resume 1: ", coroutine.resume(co))
    print("resume 2: ", coroutine.resume(co))
    print("status: ", coroutine.status(co))
    print("resume 3: ", coroutine.resume(co))

    print("coroutine np uses a named function")
    print("create np, create leaves cor suspended: ")
    np = coroutine.create(myPrint)
    print("status: ", coroutine.status(np))
    print("resume: ", coroutine.resume(np))
    print("status: ", coroutine.status(np))
    print("resume: ", coroutine.resume(np))

    g1 = coroutine.create(xSqrySqr)
end



function myPrint()
    print("This hi!")
end

x= 10
y=10
x1=10
y1 = 10
-- This function gets called once every frame

function draw()
 --  xSquared()
    -- This sets a dark background color
--    background(40, 40, 50)
   -- coroutine.resume(g1)
    -- This sets the line thickness
    strokeWidth(5)
 --   x, y, x1, y1 = xSquared()
    line(x, y, x1, y1)
    -- Do your drawing here

end

function xSqrySqr()
    x = 0
    y = 0
    x1 = 0
    y1 = 0
    j = -1
    while j < 1.1 do
        x1 = x1 + (500/20)
        y1 = math.sqrt(1- j^2) * HEIGHT/2

        print(x, y, x1, y1)
        coroutine.yield()
        x = x1
        y = y1
        j = j + 2/25
    end
end

function touched(touch)
    if touch.state == ENDED then
        coroutine.resume(g1)
    end
end