added vec.js

3 files changed, 46 insertions, 7 deletions

diff --git a/examples/jarvis.js b/examples/jarvis.js
index a94121c..9d4bb91 100644
--- a/examples/jarvis.js
+++ b/examples/jarvis.js
@@ -19,26 +19,29 @@ main.on('open', ()=>{ // Tries to identify itself with a cursor movement
   function detect(pos, send){
     if (equals(pos[0],coords)){
       main.off('cursor', detect);
-      this.emit('identity', send);
+      identity(send);
     }
   }
 })
 
-main.on('identity', (sender) => { // Does this need to be an event (or would a callback like identity(sender) work just as well?)
+function identity(sender){
+
   console.log('identity activated');
   
   var search = new Space();
   search.adhoc('jarvis'); // The search space is the word jarvis, so whenever that's caught, a relevant function can be called.
-  var read = new Search();
+  var read = new Search(search);
   var expire = {};
 
-  main.on('tileUpdate', (send, source, tiles) => {
+  main.on('tileUpdate', (send, source, tiles) => { console.log(tiles); });
+  /*main.on('tileUpdate', (send, source, tiles) => {
+    console.log('detected update', tiles);
     if (send == sender) return;
     let locs = tilekeys(tiles);
 
     for (let i=0; i<locs.length; i++){
       let loc = locs[i];
-      if read.has(loc) clearTimeout(expire[loc]);
+      if (read.has(loc)) clearTimeout(expire[loc]);
       let locspace = new Space();
       locspace.fromfetch(tiles, [loc[0][0], loc[0][1], loc[1][0], loc[1][1]], conform=false);
       let results = read.add(locspace);
@@ -46,8 +49,8 @@ main.on('identity', (sender) => { // Does this need to be an event (or would a c
       expire[loc] = setTimeout(()=>{read.del(loc)}, 30000);
     }
 
-  });
-});
+  });*/
+}
 
 function respond(coord){
   console.log('called at', coord);
diff --git a/tests/vec_elem.js b/tests/vec_elem.js
new file mode 100644
index 0000000..f364681
--- /dev/null
+++ b/tests/vec_elem.js
@@ -0,0 +1,10 @@
+// Tests vec.js, in its main functionality---.elem()
+
+const vec = require('../utils/vec');
+
+coord1 = [-22, 23];
+coord2 = [25, 25];
+
+console.log('add', vec.add(coord1, coord2));
+console.log('sub', vec.sub(coord1, coord2));
+console.log('min', vec.elem(coord1, coord2, (a,b) => Math.min(a,b)));
diff --git a/utils/vec.js b/utils/vec.js
new file mode 100644
index 0000000..9808c8b
--- /dev/null
+++ b/utils/vec.js
@@ -0,0 +1,26 @@
+// A utility library for vector (coordinate) operations.
+
+exports.mult = function(vec, scal){
+  for (let i = 0; i < vec.length; i++)
+    vec[i] = scal*vec[i];
+  return vec;
+}
+
+function elem(orig, vec, op){
+  let comb = [];
+  for (let i = 0; i < orig.length; i++){
+    comb.push(op(vec[i],orig[i]));
+  }
+  return comb;
+}
+exports.elem = elem;
+
+exports.add = function(orig, vec){
+  return elem(orig, vec, (a,b) => a+b);
+}
+exports.sub = function(orig, vec){
+  return elem(orig, vec, (a,b) => a-b);
+}
+exports.dot = function(orig,vec){
+  return elem(orig, vec, (a,b) => a*b);
+}