From 57d6b3e077f55b63ec98a5fefdbdae50b5335e09 Mon Sep 17 00:00:00 2001
From: Holden Rohrer <hr@hrhr.dev>
Date: Sun, 9 Feb 2020 16:07:56 -0500
Subject: externalized charToTile component of raster

---
 utils/raster.js | 2 +-
 utils/vec.js    | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/utils/raster.js b/utils/raster.js
index 44f4678..1e17838 100644
--- a/utils/raster.js
+++ b/utils/raster.js
@@ -6,7 +6,7 @@ const vec = require('./vec');
 module.exports = function(space){
   // just use .subsection
   let tiles = {};
-  dim = ms(space).map(coord => vec.dot(coord,[1/8, 1/16])).map(tile => vec.elem(tile, [], a => Math.floor(a)));
+  dim = ms(space).map(coord => vec.charToTile(coord));
   for (let y=dim[0][0]; y<=dim[0][1]; y++) for (let x=dim[1][0]; x<=dim[1][1]; x++){
     let tile = tileToChar([y,x]);
     tiles[tile] = space.subsection(tile, vec.add(tile, [8,16]));
diff --git a/utils/vec.js b/utils/vec.js
index d595989..57104df 100644
--- a/utils/vec.js
+++ b/utils/vec.js
@@ -33,6 +33,9 @@ exports.dot = function(orig,vec){
 exports.tileToChar = function(orig){
   return exports.dot(orig, [8,16]);
 }
+exports.charToTile = function(orig){
+  return exports.elem(exports.dot(orig, [1/8, 1/16]), [], a => Math.floor(a));
+}
 exports.norm = function(orig){
   let sum = orig.reduce( (acc, cur) => acc+cur );
   return exports.dot(orig, 1/sum);
-- 
cgit