Open-Terrarium/collision.lua

--basic grid based collision detection

function collision(oldposx,oldposy)
	--stairs
	--if (player.playerx <= map_max and player.playerx > 1) and 
	--	(player.playery < map_max and player.playery > 1) and 
	--	loaded_chunks[0][0][player.playerx][player.playery]["block"] == 3 then
	--	player.playery = player.playery - 1
	if (player.playerx > map_max or player.playerx <= 0) or (player.playery > map_max or player.playery <= 0) or loaded_chunks[0][0][player.playerx][player.playery]["block"] ~= 1 then
		player.playerx,player.playery = oldposx,oldposy
		--can't move
		oof:setPitch(love.math.random(65,100)/100)
		oof:stop()
		oof:play()
		return(true)
	end
	
end

--make the player fall when in air
gravtimer = 0

function gravity(dt)
	--don't apply gravity if at bottom
	if player.playery == map_max then
		player.playery = player.playery + 1
		maplib.new_block()
		return
	end
	
	if loaded_chunks[0][0][player.playerx][player.playery+1]["block"] == 1 then
		gravtimer = gravtimer + dt
		if gravtimer >= 0.2 then
			local oldposx,oldposy = player.playerx,player.playery
			
			player.playery = player.playery + 1
			
			collision(oldposx,oldposy)
			
			gravtimer = 0
		end
	else
		gravtimer = 0
	end

end