javascript(ultra32): added rotate

Signed-off-by: prescientmoon <git@moonythm.dev>

javascript/ultra32/.gitignore

@@ -1,61 +1,3 @@
-# Logs
-logs
-*.log
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Runtime data
-pids
-*.pid
-*.seed
-*.pid.lock
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-lib-cov
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-
-# nyc test coverage
-.nyc_output
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-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
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-# Bower dependency directory (https://bower.io/)
-bower_components
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-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (https://nodejs.org/api/addons.html)
-build/Release
-
-# Dependency directories
-node_modules/
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-# Optional npm cache directory
-.npm
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-.yarn-integrity
-
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-.env
-
-# next.js build output
-.next
+node_modules
+app.ts
+tsconfig.json

javascript/ultra32/app.js

@@ -35,3 +35,10 @@ function mirror(vector) {
     return vector;
 }
 exports.mirror = mirror;
+function rotate(vector) {
+    const oldx = vector[0];
+    vector[0] = Math.cos(vector[0]) - Math.sin(vector[1]);
+    vector[1] = Math.sin(oldx) + Math.cos(vector[1]);
+    return vector;
+}
+exports.rotate = rotate;