-- Collison use HC
--
-- vrld/HC: General purpose collision detection library for the use with LÖVE.
-- https://github.com/vrld/HC

Polygon = require "HC.polygon"

function love.load()
  
  polys = {
    {20, 80, 80, 20, 120, 140},
    {140, 80, 200, 20, 260, 100, 200, 180},
    {340, 20, 400, 60, 380, 160, 320, 160, 280, 80},
    {460, 60, 520, 20, 600, 60, 600, 160, 520, 180, 460, 140},
    {140, 340, 260, 340, 280, 420, 100, 440, 20, 360, 40, 200, 100, 200},
    {500, 320, 460, 220, 380, 240, 440, 340, 300, 360, 340, 440, 500, 420, 520, 460, 620, 420, 600, 320}
  }

  hits = {}
  p = {}
  for i = 1, #polys do
    hits[i] = false
    p[#p + 1] = Polygon(unpack(polys[i])) 
  end
end

function love.update(dt)
  local mx, my
  mx, my = love.mouse.getPosition()

  for i = 1, #p do
    hits[i] = p[i]:contains(mx, my)
  end
end

function love.draw()
  -- clear canvas
  love.graphics.clear(0, 0, 0, 1)

  -- draw polygon
  for i = 1, #p do
    if hits[i] then
      love.graphics.setColor(1, 0, 0, 1)
    else
      love.graphics.setColor(0, 1, 0, 1)
    end
    love.graphics.polygon("line", p[i]:unpack())
  end

  -- draw text
  love.graphics.setColor(1, 1, 1, 1)
  love.graphics.print("ESC to exit.", 8, 8)
end

function love.keypressed(key, scancode, isrepeat)
  if key == "escape" then
    love.event.quit()
  end
end