Forgot the little matrix wrapper.

README.md

@@ -84,7 +84,33 @@ See? That's how Free Speech works. You don't need a LICENSE.
 
 ## Build Instructions
 
-Coming soon, but I do know it builds on OSX and Linux. I primarily work on Windows.
+Pre-requisites:
+
+* Meson -- which need Python
+* C++ Compiler -- Tested with Clang and G++
+* GNU make -- For the convenience Makefile
+
+Windows instructions
+
+```shell
+git clone https://git.learnjsthehardway.com/learn-code-the-hard-way/roguish.git
+
+cd roguish
+# ignore the errors the first time
+./scripts/reset_build.ps1
+
+# first compile takes a while
+make
+
+# will play a sound and open windows
+make test
+
+# this copies the binary so you can run it
+make run
+```
+
+
+
 
 ## OSX Build Notes
 

matrix.hpp

@@ -0,0 +1,14 @@
+#pragma once
+#include <vector>
+
+typedef std::vector<int> MatrixRow;
+typedef std::vector<MatrixRow> Matrix;
+
+/*
+ * Just a quick thing to reset a matrix to a value.
+ */
+inline void matrix_assign(Matrix &out, int new_value) {
+  for(auto &row : out) {
+    row.assign(row.size(), new_value);
+  }
+}