sounds.p8

pico-8 cartridge // http://www.pico-8.com
version 16
__lua__
-- something for your ear holes!
-- bright moth games

step = .01667 -- our framerate, 1/60

function _init()
	menuitem(1, "next demo", loadnextdemo)
	frames = { 3, 4, 2, 1}
	frametime	= 0
	frameidx = 1
	speed = 30
	x,y = 60, 60
	walking = false
	left = false
	
	jumping = false
	onground = false
	jumptime = 0
	crouched = false
	camx = 0
end

function _update60()
	frametime += 1
	walking = false
	jumping = false
	crouched = false
	onground = false
	
	local leftcells = getleftcells()
	if(btn(0) and x > 0 and not hardright(leftcells.a) and not hardright(leftcells.b)) then
		x -= speed * step
		walking = true 
		left = true
		if(camx > 0 and x - camx < 28) camx -= speed * step
	end

	local rightcells = getrightcells()
	if(btn(1) and x < 248 and not hardleft(rightcells.a) and not hardleft(rightcells.b)) then
		x += speed * step 
		walking = true 
		left = false
		if(camx + 128 < 256 and x - camx > 100) camx += speed * step
	end
	
	local belowcells = getbottomcells()
	if(hardtop(belowcells.a) or hardtop(belowcells.b)) then
		onground = true
		jumptime = 0
	end
	
	if(btn(3) and not walking and onground) then
		frameidx = 9
		crouched = true
	end
	
	if(btn(5) and (onground or jumptime < 36)) then
		jumping = true
		-- if we're on the ground then
		-- we just started jumping!
		-- play  jump sound!
		if(onground) then
			sfx(8)
		end
		onground = false
		y -= speed * step
	end
	
	if(not onground) then
		if(jumping) then
			frameidx = 5
			jumptime += 1
		else
			frameidx = 6
			y += speed * step
			jumptime = 36			
		end
	else
		jumptime = 0
		if(walking) then
			if(frametime > 10) then
				frametime = 0
				frameidx += 1
				-- if our animation is a
				-- step down frame, play a
				-- step sound!
				if(frameidx == 1) sfx(9)
				if(frameidx == 3) sfx(10)
			end
			if(frameidx > 4) then
				-- make sure we play our
				-- step sound when the
				-- frames loop around
				sfx(9)
				frameidx = 1
			end
		elseif(not crouched) then
			frametime = 0
			frameidx = 0
		end
	end
end

function _draw()
	camera(camx, 0)
	cls(12)
	map(0,0,0,28,32,16)
	if(onground and walking) then
		spr(frames[frameidx], x, y, 1, 1, left)
	else
		spr(frameidx, x, y, 1, 1, left) 
	end
	camera(0, 0)
	print("sounds", 104, 122, 7)
end

function getplayercell()
	local xo = 0
	if(left) xo = -3
	return getcell(x + 5 + xo, y + 4)
end

function getleftcells()
	local cells = {}
	cells.a = getcell(x + 1, y + 4)
	cells.b = getcell(x + 1, y + 7)
	return cells
end

function getrightcells()
	local cells = {}
	cells.a = getcell(x + 6, y + 4)
	cells.b = getcell(x + 6, y + 7)
	return cells
end

function getbottomcells()
	local cells = {}
	cells.a = getcell(x + 3, y + 8)
	cells.b = getcell(x + 5, y + 8)
	return cells
end

function getcell(wx, wy)
	local cell = {}
	cell.x = flr(wx / 8)
	cell.y = flr((wy - 28)/8)
	return cell
end

function hardleft(cell)
	local cellid = mget(cell.x, cell.y)
	return fget(cellid, 1)
end

function hardright(cell)
	local cellid = mget(cell.x, cell.y)
	return fget(cellid, 2)
end

function hardtop(cell)
	local cellid = mget(cell.x, cell.y)
	return fget(cellid, 0)
end

-->8
-- demo switching

function loadnextdemo()
	load('parallax.p8', 'previous demo')	
end
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