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main.lua

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+-- https://twitter.com/aemkei/status/1378106731386040322?s=46&t=vAQ328oQf-s81-tV9T-wKQ
+
+import "CoreLibs/sprites"
+
+local gfx <const> = playdate.graphics
+
+gfx.setBackgroundColor(gfx.kColorBlack)
+playdate.display.setRefreshRate(10)
+
+local playerSprite = nil
+local W = playdate.display.getWidth()
+local H = playdate.display.getHeight()
+
+fnt = gfx.font.new("fonts/Roobert-11-Medium")
+
+local imgSprite = gfx.image.new(W,H)
+local imgHud = gfx.image.new(W//3,H//8)
+
+spr = gfx.sprite.new( imgSprite )
+spr:moveTo( 0,0 )
+spr:setCenter( 0,0 )
+spr:add()
+
+hud = gfx.sprite.new( imgHud )
+hud:moveTo( 15,190 )
+hud:setCenter( 0,0 )
+hud:add()
+
+function p_xor_mod(x,y,z) return (x ~ y) % z end
+function p_or_mod(x,y,z) return (x | y) % z end
+function p_mul_and(x,y,z) return (x * y) & z end
+function p_xor_lsh(x,y,z) return (x ~ y) << z end
+function p_mul_mod(x,y,z) return (x * z) % (y+1) end
+-- function p_mul_mod_offset(x,y,z) return ((x-W//2) * z) % ((y-H//2)+1) end
+
+local allFuncs = {p_xor_mod, p_or_mod, p_mul_and, p_xor_lsh, p_mul_mod} --p_mul_mod_offset
+local allLabels = {"(x ~ y) %% %s", "(x | y) %% %s", "(x * y) & %s", "(x ~ y) << %s", "(x * %s) %% y", "((x-200) * %s) %% (y-120)"}
+
+local current = 1
+local f = allFuncs[current]
+local ft = allLabels[current]
+local delta = 1
+local var = 5
+local changed = true
+
+function drawPixels()
+	gfx.lockFocus(imgSprite)
+	for x=0,W do
+		for y=0,H do
+			p = f(x,y, var)
+			if p == 0 then
+				gfx.setColor(gfx.kColorWhite)
+			else
+				gfx.setColor(gfx.kColorBlack)
+			end
+			gfx.drawPixel(x,y)
+		end
+	end
+	gfx.unlockFocus()
+
+	changed = false
+end
+
+function drawHud()
+	gfx.lockFocus(imgHud)
+	gfx.clear(gfx.kColorWhite)
+	fnt:drawText(string.format(ft,var), 5,5)
+	gfx.unlockFocus()
+
+	changed = false
+end
+
+function math.ring(a, min, max)
+	if min > max then
+		min, max = max, min
+	end
+	return min + (a-min)%(max-min)
+end
+
+function math.ring_int(a, min, max)
+	return math.ring(a, min, max+1)
+end
+
+function setVar(m)
+	var = m
+	changed = true
+end
+
+function funcNext()
+	current = math.ring_int(current+1,1,#allFuncs)
+	ft = allLabels[current]
+
+	changed = true
+
+	return allFuncs[current]
+end
+
+function funcPrev()
+	current = math.ring_int(current-1,1,#allFuncs)
+	ft = allLabels[current]
+
+	changed = true
+
+	return allFuncs[current]
+end
+
+local myInputHandlers = {
+
+	AButtonDown = function()
+		delta = 5
+	end,
+	AButtonUp = function()
+		delta = 1
+	end,
+	BButtonDown = function()
+		delta = 10
+	end,
+	BButtonUp = function()
+		delta = 1
+	end,
+	upButtonDown = function()
+		setVar(var + delta)
+	end,
+	downButtonDown = function()
+		setVar(var - delta)
+	end,
+	leftButtonDown = function()
+		f = funcPrev()
+	end,
+	rightButtonDown = function()
+		f = funcNext()
+	end,
+
+	cranked = function(change, acceleratedChange)
+	end,
+}
+playdate.inputHandlers.push(myInputHandlers)
+
+function playdate.update()
+	if changed == true then
+		drawPixels()
+		drawHud()
+	end
+
+	gfx.sprite.update()
+end

pdxinfo

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+name=Mandala
+author=Matt Sephton
+description=Logic Operation Pixel Patterns
+bundleID=com.gingerbeardman.mandala
+version=1.01
+buildNumber=101