update PicoCalc SD

Bin/PicoCalc SD/lua/bubble.lua

@@ -0,0 +1,50 @@
+-- Bubble Universe
+-- inspired by https://forum.clockworkpi.com/t/bubble-universe/19907
+
+local w = 320
+local w2 = w/2
+local rad = 70
+local n = 20
+local nc = 120
+local step = 2
+local r = math.pi*2/n
+local x,y,t = 0,0,6
+local u,v,px,py
+
+local res = 100
+
+local sint = {}
+for i = 1, math.floor(math.pi*2*res) do
+	sint[i] = math.sin(i/res)
+end
+
+local function fsin(i)
+	return sint[(math.floor(i*res)%#sint)+1]
+end
+
+local function fcos(i)
+	return sint[((math.floor((math.pi/2-i)*res))%#sint)+1]
+end
+
+draw.enableBuffer(2)
+while true do
+	if keys.getState(keys.esc) then break end
+	draw.clear()
+	for i = 0, n-1 do
+		for c = 0, nc-1, step do
+			u = fsin(i+y)+fsin(r*i+x)
+			v = fcos(i+y)+fcos(r*i+x)
+			x = u + t
+			y = v
+			px = u * rad + w2
+			py = y * rad + w2
+			draw.point(px, py,
+			--draw.rectFill(px, py, 2, 2,
+				colors.fromRGB(math.floor(63+i/n*192),
+					math.floor(63+c/nc*192),168))
+		end
+	end
+	t=t+0.02
+	draw.blitBuffer()
+end
+draw.enableBuffer(false)