1 files changed, 41 insertions, 0 deletions
diff --git a/vec3-cross.lua b/vec3-cross.lua
new file mode 100755
index 0000000..304c9f5
--- /dev/null
+++ b/vec3-cross.lua
@@ -0,0 +1,41 @@
+#!/usr/bin/env lua
+local eyes = require "eyes"
+local format = require "format"
+local reading = require "reading"
+local vec3 = require "cpml".vec3
+local readout = {
+	[0] = vec3.new{ 0,  0,  1},
+	[1] = vec3.new{ 0,  1,  0},
+	[2] = vec3.new{ 1,  0,  0},
+	[3] = vec3.new{ 0, -1,  0},
+	[4] = vec3.new{-1,  0,  0},
+}
+local translation = {
+	vec3.new{ 0,  0,  0},
+	vec3.new{ 0,  0,  1},
+	vec3.new{ 0,  1,  0},
+	vec3.new{ 1,  0,  0},
+	vec3.new{ 0,  0, -1},
+	vec3.new{ 0, -1,  0},
+	vec3.new{-1,  0,  0},
+}
+
+
+function translate (v)
+	for i, r in ipairs(translation) do
+		if r == v then
+			return i - 1
+		end
+	end
+	error "unexpected vec3"
+end
+
+
+for _, message in ipairs(eyes) do
+	local values = {}
+	for _, a, b, c in reading.trigrams(message) do
+		local v = readout[a]:cross(readout[b]):cross(readout[c])
+		table.insert(values, translate(v))
+	end
+	print(format.csv(values))
+end