LÖVE

Code: Select all

local direction
local speed = 10
local x, y = 0, 0

love.update = function(dt)
  if love.keyboard.isDown("a") then
    direction = 1 -- left
  elseif love.keyboard.isDown("d") then
    direction = 2 -- right
  end
--here the trickest part, you should take in account dt and somehowe implement in by youself
--in that example, i don't use it, so remember about that
  for i = 0, speed do
    if direction == 1 then
      x = x - 1 -- left
    elseif direction == 2 then
      x = x + 1 -- right
    end

    if checkCollision(x, y) then --here you check with aabb if player overlap some collision
    -- if it everlap something, then we should push our "player" object out
      if direction == 1 then
        x = x + 1 -- push object right
      elseif direction == 2 then
        x = x - 1 -- push object left
      end
      break -- stop our movement loop
  end

end

Code: Select all

local player = {x=200, y=200, width=20, height=20} -- x/y is the top left corner.
local box    = {x=230, y=230, width=40, height=40}

local TAU = 2*math.pi

local function areAabbsOverlapping(a, b)
	return a.x < b.x+b.width
	   and a.y < b.y+b.height
	   and a.x+a.width  > b.x
	   and a.y+a.height > b.y
end

function love.update(dt)
	-- Move player.
	local dx = 0
	local dy = 0
	if love.keyboard.isDown("left")  then  dx = dx - 100*dt  end
	if love.keyboard.isDown("right") then  dx = dx + 100*dt  end
	if love.keyboard.isDown("up")    then  dy = dy - 100*dt  end
	if love.keyboard.isDown("down")  then  dy = dy + 100*dt  end

	local lastX = player.x
	local lastY = player.y
	player.x    = lastX + dx
	player.y    = lastY + dy

	-- Handle collision.
	if areAabbsOverlapping(player, box) then
		local playerLastCenterX = lastX + player.width/2
		local playerLastCenterY = lastY + player.height/2

		local boxCenterX = box.x + box.width/2
		local boxCenterY = box.y + box.height/2

		-- Get the angle from the center of the box to the center of the
		-- player where they were the last frame.
		local angle = math.atan2(playerLastCenterY-boxCenterY, playerLastCenterX-boxCenterX)

		-- Use the angle to determine what direction the player should get
		-- "pushed out" towards.
		if     math.abs(angle) < 1/8*TAU then  player.x = box.x + box.width     -- Right side of box.
		elseif math.abs(angle) > 3/8*TAU then  player.x = box.x - player.width  -- Left side of box.
		elseif          angle  > 0       then  player.y = box.y + box.height    -- Bottom side of box.
		else                                   player.y = box.y - player.height -- Top side of box.
		end
	end
end

function love.draw()
	love.graphics.rectangle("fill", player.x, player.y, player.width, player.height)
	love.graphics.rectangle("fill", box.x,    box.y,    box.width,    box.height)
end