mecks - npm Package Compare versions

Comparing version 0.1.2 to 0.1.3

gulpfile.js

@@ -6,2 +6,3 @@ var gulp = require('gulp');
 var jscs = require('gulp-jscs');
+var istanbul = require('gulp-istanbul');
 var runSequence = require('run-sequence');
@@ -43,1 +44,14 @@
 });
+
+
+gulp.task('coverage', function (cb) {
+    gulp.src(srcFiles)
+        .pipe(istanbul()) // Covering files
+        .pipe(istanbul.hookRequire()) // Force `require` to return covered files
+        .on('finish', function () {
+            gulp.src(unitTestFiles)
+                .pipe(mocha())
+                .pipe(istanbul.writeReports()) // Creating the reports after tests runned
+                .on('end', cb);
+        });
+});

index.js

@@ -1,3 +0,5 @@
-var Matrix2 = require('./lib/matrix2');
-
-module.exports.Matrix2 = Matrix2;
+exports.Matrix2 = require('./lib/matrix2');
+exports.Matrix3 = require('./lib/matrix3');
+exports.Matrix4 = require('./lib/matrix4');
+exports.Plane = require('./lib/plane');
+exports.Constants = require('./lib/constants');

lib/matrix2.js

@@ -0,7 +1,43 @@
+/** @module Matrix2 */
+'use strict';
+
 var Vec2 = require('vecks').Vec2;
 
-var EPSILON = 1e-10;
-var I_FACTOR = 2;
+var EPSILON = require('./constants').EPSILON;
 
+var ROW_COL_LENGTH = 2;
+var NUM_ELEMS = 4;
+
 /**
+ * Null Matrix Data
+ *
+ * @type {number[]}
+ */
+var nullMatrixData = [
+    0, 0,
+    0, 0
+];
+
+/**
+ * Identity Matrix Data
+ * @type {number[]}
+ */
+var identityMatrixData = [
+    1, 0,
+    0, 1
+];
+
+function mulS(data, s){
+    for (var n = 0; n < NUM_ELEMS; ++n) {
+        data[n] *= s;
+    }
+}
+
+function addS(data, s){
+    for (var n = 0; n < NUM_ELEMS; ++n) {
+        data[n] += s;
+    }
+}
+
+/**
  * A 2x2 matrix
@@ -16,42 +52,176 @@ */
     function construct(){
+        if(!data){
+            data = nullMatrixData;
+        }// initialize to zero if no values were given
         my.data = data;
     }
 
+    /** Access an element of the matrix.
+     *
+     * @param {number} i    row index
+     * @param {number} j    column index
+     */
+    this.at = function(i, j){
+        return at(i, j);
+    };
+
+    /** Get all elements of the matrix.
+     *
+     * @returns {Array.<number>}    linearized data of the matrix
+     */
+    this.data = function(){
+        return my.data.slice(0);
+    };
+
+    /**
+     * Calculate the determinant of the matrix.
+     *
+     * @returns {float}
+     */
     this.det = function(){
-        return at(0, 0) * at(1, 1) - at(1, 0) * at(0, 1);
+        var a11 = data[0];
+        var a12 = data[1];
+        var a21 = data[2];
+        var a22 = data[3];
+
+        return a11 * a22 - a21 * a12;
     };
 
-    this.inverse = function(){
+    /**
+     * Invert the Matrix.
+     *
+     * @returns {Matrix2}
+     */
+    this.inv = function(){
         var det = this.det();
         if (Math.abs(det) < EPSILON) {
-            throw new Error('Can not invert matrix, since determinant is near 0');
+            return null;
         }
-
         return new Matrix2([
-            at(1, 1) / det,
-            -at(0, 1) / det,
-            -at(1, 0) / det,
-            at(0, 0) / det
+             data[3] / det,
+            -data[1] / det,
+            -data[2] / det,
+             data[0] / det
         ]);
     };
 
-    this.multiplyVector = function(v){
+    /**
+     * Multiply a given vector with this matrix.
+     *
+     * @param v
+     * @returns {Vec2}
+     */
+    this.mulV = function(v){
         return new Vec2(
-            at(0, 0) * v.x + at(0, 1) * v.y,
-            at(1, 0) * v.x + at(1, 1) * v.y
+            my.data[0] * v.x + my.data[1] * v.y,
+            my.data[2] * v.x + my.data[3] * v.y
         );
     };
 
-    this.at = function(i, j){
-        return at(i, j);
+    /**
+     * Add a given righthandside Matrix2 to this Matrix.
+     *
+     * @param rhs
+     * @returns {Matrix2}
+     */
+    this.add = function(rhs){
+        var rhsData = rhs._raw();
+        for(var i = 0; i < NUM_ELEMS; i++){
+            data[i] += rhsData[i];
+        }
+        return new Matrix2(data);
     };
 
-    this.data = function(){
-        return my.data.slice(0);
+    /**
+     * Subtract a given righthandside Matrix2 to this Matrix.
+     *
+     * @param rhs
+     * @returns {Matrix2}
+     */
+    this.sub = function(rhs){
+        var rhsData = rhs._raw();
+        for(var i = 0; i < NUM_ELEMS; i++){
+            data[i] -= rhsData[i];
+        }
+        return new Matrix2(data);
     };
 
-    // private
 
+    /**
+     * Multiply the Matrix by a given righthandside Matrix2.
+     *
+     * @param rhs
+     * @returns {Matrix2}
+     */
+    this.mul = function(rhs){
+        var result = nullMatrixData.slice(0);
+        var lhsData = my.data;
+        var rhsData = rhs._raw();
+        for (var n = 0; n < NUM_ELEMS; ++n) {
+            var j = n % ROW_COL_LENGTH;
+            for (var k = 0; k < ROW_COL_LENGTH; ++k) {
+                result[n] += lhsData[n + k - j] * rhsData[ROW_COL_LENGTH * k + j];
+            }
+        }
+        return new Matrix2(result);
+    };
+
+
+
+
+    /**
+     * Add a Scalar value to the Matrix.
+     *
+     * @param s
+     * @returns {Matrix2}
+     */
+    this.addS = function(s){
+        var data = this.data();
+        addS(data, s);
+        return new Matrix2(data);
+    };
+
+    /**
+     * Subtract a Scalar value from the Matrix.
+     *
+     * @param s
+     * @returns {Matrix2}
+     */
+    this.subS = function(s){
+        var data = this.data();
+        addS(data, -s);
+        return new Matrix2(data);
+    };
+
+    /**
+     * Multiply the Matrix by a Scalar Value.
+     *
+     * @param s
+     * @returns {Matrix2}
+     */
+    this.mulS = function(s){
+        var data = this.data();
+        mulS(data, s);
+        return new Matrix2(data);
+    };
+
+    /**
+     * Divide the Matrix by a Scalar Value.
+     *
+     * @param s
+     * @returns {Matrix2}
+     */
+    this.divS = function(s){
+        var data = this.data();
+        mulS(data, 1 / s);
+        return new Matrix2(data);
+    };
+
+
+    this._raw = function(){
+        return my.data;
+    };
+
     var at = function(i, j){
-        return my.data[I_FACTOR * i + j];
+        return my.data[2 * i + j];
     };
@@ -61,3 +231,20 @@
 }
+/**
+ * Returns a new Identity Matrix.
+ *
+ * @returns {Matrix2}
+ */
+Matrix2.identity = function(){
+    return new Matrix2(identityMatrixData);
+};
 
+/**
+ * Returns a new Null Matrix.
+ *
+ * @returns {Matrix2}
+ */
+Matrix2.nullMatrix = function(){
+    return new Matrix2(nullMatrixData);
+};
+
 module.exports = Matrix2;

package.json

 {
   "name": "mecks",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Minimum Linear Algebra Library",
   "main": "index.js",
-  "repository": {
-    "type": "git",
-    "url": "git+ssh://[e-mail]/ubimake/mecks.git"
+  "directories": {
+    "test": "test"
   },
-  "license": "MIT",
-  "keywords": [
-    "linear",
-    "algebra",
-    "math"
-  ],
   "scripts": {
@@ -20,10 +13,11 @@ "test": "gulp"
   "devDependencies": {
-    "chai": "^1.9.2",
-    "gulp": "^3.8.10",
-    "gulp-jscs": "^1.3.0",
-    "gulp-jshint": "^1.9.0",
+    "chai": "^1.10.0",
+    "gulp": "^3.9.1",
+    "gulp-istanbul": "^0.9.0",
+    "gulp-jscs": "^1.6.0",
+    "gulp-jshint": "^1.12.0",
     "gulp-mocha": "^1.1.1",
-    "jshint-stylish": "^1.0.0",
-    "mocha": "^2.0.1",
-    "run-sequence": "^1.1.0"
+    "jshint-stylish": "^1.0.2",
+    "mocha": "^2.4.5",
+    "run-sequence": "^1.1.5"
   },
@@ -33,29 +27,7 @@ "dependencies": {
   },
-  "gitHead": "5cefbe104fe29802b285f1f71531ee7a049dacd8",
-  "bugs": {
-    "url": "https://github.com/ubimake/mecks/issues"
-  },
-  "homepage": "https://github.com/ubimake/mecks#readme",
-  "_id": "mecks@0.0.1",
-  "_shasum": "8b2dc56c6ae22f61f55889395af05922fefb0d88",
-  "_from": "mecks@",
-  "_npmVersion": "2.9.1",
-  "_nodeVersion": "0.10.37",
-  "_npmUser": {
-    "name": "xoryouyou",
-    "email": "[e-mail]"
-  },
-  "dist": {
-    "shasum": "8b2dc56c6ae22f61f55889395af05922fefb0d88",
-    "tarball": "https://registry.npmjs.org/mecks/-/mecks-0.0.1.tgz"
-  },
-  "maintainers": [
-    {
+  "author": {
       "name": "xoryouyou",
       "email": "[e-mail]"
-    }
-  ],
-  "directories": {},
-  "_resolved": "https://registry.npmjs.org/mecks/-/mecks-0.0.1.tgz",
-  "readme": "ERROR: No README data found!"
+    },
+  "license": "MIT"
 }

README.md

 # mecks
+
+[![Build Status](https://travis-ci.org/ubimake/mecks.svg#branch=dev)](https://travis-ci.org/ubimake/mecks)
+
 Minimum Linear Algebra Library
@@ -8,4 +11,551 @@
 
+mecks was built immutable on purpose and relies on the `vecks` vector library.
+
 ## Contributing
 
 While developing make sure you use `gulp watch` to ease the process of testing your contribution.
+
+
+## Documentation
+
+* * *
+
+# Matrix2
+
+
+
+
+**Members:**
+
++ nullMatrixData
++ identityMatrixData
+
+* * *
+
+### Matrix2.Matrix2()
+
+A 2x2 matrix
+
+
+
+### Matrix2.construct()
+
+Construct the matrix using a linearized array
+
+
+
+### Matrix2.at(i, j)
+
+Access an element of the matrix.
+
+**Parameters**
+
+**i**: `number`, row index
+
+**j**: `number`, column index
+
+
+
+### Matrix2.data()
+
+Get all elements of the matrix.
+
+**Returns**: `Array.<number>`, linearized data of the matrix
+
+
+### Matrix2.det()
+
+Calculate the determinant of the matrix.
+
+**Returns**: `float`
+
+
+### Matrix2.inv()
+
+Invert the Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.mulV(v)
+
+Multiply a given vector with this matrix.
+
+**Parameters**
+
+**v**: , Multiply a given vector with this matrix.
+
+**Returns**: `Vec2`
+
+
+### Matrix2.add(rhs)
+
+Add a given righthandside Matrix2 to this Matrix.
+
+**Parameters**
+
+**rhs**: , Add a given righthandside Matrix2 to this Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.sub(rhs)
+
+Subtract a given righthandside Matrix2 to this Matrix.
+
+**Parameters**
+
+**rhs**: , Subtract a given righthandside Matrix2 to this Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.mul(rhs)
+
+Multiply the Matrix by a given righthandside Matrix2.
+
+**Parameters**
+
+**rhs**: , Multiply the Matrix by a given righthandside Matrix2.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.addS(s)
+
+Add a Scalar value to the Matrix.
+
+**Parameters**
+
+**s**: , Add a Scalar value to the Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.subS(s)
+
+Subtract a Scalar value from the Matrix.
+
+**Parameters**
+
+**s**: , Subtract a Scalar value from the Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.mulS(s)
+
+Multiply the Matrix by a Scalar Value.
+
+**Parameters**
+
+**s**: , Multiply the Matrix by a Scalar Value.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.divS(s)
+
+Divide the Matrix by a Scalar Value.
+
+**Parameters**
+
+**s**: , Divide the Matrix by a Scalar Value.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.identity()
+
+Returns a new Identity Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix2.nullMatrix()
+
+Returns a new Null Matrix.
+
+**Returns**: `Matrix2`
+
+
+
+* * *
+
+
+
+
+
+
+
+
+
+
+# Matrix3
+
+
+
+
+**Members:**
+
++ nullMatrixData
++ identityMatrixData
+
+* * *
+
+### Matrix3.Matrix3()
+
+A 3x3 matrix
+
+
+
+### Matrix3.construct()
+
+Construct the matrix using a linearized array
+
+
+
+### Matrix3.at(i, j)
+
+Access an element of the matrix.
+
+**Parameters**
+
+**i**: `number`, row index
+
+**j**: `number`, column index
+
+
+
+### Matrix3.data()
+
+Get all elements of the matrix.
+
+**Returns**: `Array.<number>`, linearized data of the matrix
+
+
+### Matrix3.det()
+
+Calculate the determinant of the matrix.
+
+**Returns**: `float`
+
+
+### Matrix3.inv()
+
+Invert the Matrix.
+
+**Returns**: `Matrix3`
+
+
+### Matrix3.add(rhs)
+
+Add a given righthandside Matrix4 to this Matrix.
+
+**Parameters**
+
+**rhs**: , Add a given righthandside Matrix4 to this Matrix.
+
+**Returns**: `Matrix3`
+
+
+### Matrix3.sub(rhs)
+
+Subtract a given righthandside Matrix4 to this Matrix.
+
+**Parameters**
+
+**rhs**: , Subtract a given righthandside Matrix4 to this Matrix.
+
+**Returns**: `Matrix3`
+
+
+### Matrix3.mul(rhs)
+
+Multiply the Matrix by a given righthandside Matrix.
+
+**Parameters**
+
+**rhs**: , Multiply the Matrix by a given righthandside Matrix.
+
+**Returns**: `Matrix3`
+
+
+### Matrix3.mulV(rhs)
+
+Multiply a given vector
+
+**Parameters**
+
+**rhs**: , Multiply a given vector
+
+**Returns**: `Vec3`
+
+
+### Matrix3.addS(s)
+
+Add a Scalar value to the Matrix.
+
+**Parameters**
+
+**s**: , Add a Scalar value to the Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix3.subS(s)
+
+Subtract a Scalar value from the Matrix.
+
+**Parameters**
+
+**s**: , Subtract a Scalar value from the Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix3.mulS(s)
+
+Multiply the Matrix by a Scalar Value.
+
+**Parameters**
+
+**s**: , Multiply the Matrix by a Scalar Value.
+
+**Returns**: `Matrix4`
+
+
+### Matrix3.divS(s)
+
+Divide the Matrix by a Scalar Value.
+
+**Parameters**
+
+**s**: , Divide the Matrix by a Scalar Value.
+
+**Returns**: `Matrix4`
+
+
+### Matrix3.identity()
+
+Returns a new Identity Matrix.
+
+**Returns**: `Matrix3`
+
+
+### Matrix3.nullMatrix()
+
+Returns a new Null Matrix.
+
+**Returns**: `Matrix3`
+
+
+
+* * *
+
+
+
+
+
+
+
+
+
+
+# Matrix4
+
+
+
+
+**Members:**
+
++ nullMatrixData
++ identityMatrixData
+
+* * *
+
+### Matrix4.Matrix4()
+
+A 4x4 matrix
+
+
+
+### Matrix4.at(i, j)
+
+Access an element of the matrix.
+
+**Parameters**
+
+**i**: `number`, row index
+
+**j**: `number`, column index
+
+
+
+### Matrix4.data()
+
+Get all elements of the matrix.
+
+**Returns**: `Array.<number>`, linearized data of the matrix
+
+
+### Matrix4.det()
+
+Calculate the determinant of the matrix.
+
+**Returns**: `float`
+
+
+### Matrix4.inv()
+
+Invert the Matrix.
+
+**Returns**: `Matrix2`
+
+
+### Matrix4.mulV(rhs)
+
+Multiply a given vector with this matrix.
+
+**Parameters**
+
+**rhs**: , Multiply a given vector with this matrix.
+
+**Returns**: `Vec3`
+
+
+### Matrix4.add(rhs)
+
+Add a given righthandside Matrix4 to this Matrix.
+
+**Parameters**
+
+**rhs**: , Add a given righthandside Matrix4 to this Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.sub(rhs)
+
+Subtract a given righthandside Matrix4 to this Matrix.
+
+**Parameters**
+
+**rhs**: , Subtract a given righthandside Matrix4 to this Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.mul(rhs)
+
+Multiply the Matrix by a given righthandside Matrix4.
+
+**Parameters**
+
+**rhs**: , Multiply the Matrix by a given righthandside Matrix4.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.addS(s)
+
+Add a Scalar value to the Matrix.
+
+**Parameters**
+
+**s**: , Add a Scalar value to the Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.subS(s)
+
+Subtract a Scalar value from the Matrix.
+
+**Parameters**
+
+**s**: , Subtract a Scalar value from the Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.mulS(s)
+
+Multiply the Matrix by a Scalar Value.
+
+**Parameters**
+
+**s**: , Multiply the Matrix by a Scalar Value.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.divS(s)
+
+Divide the Matrix by a Scalar Value.
+
+**Parameters**
+
+**s**: , Divide the Matrix by a Scalar Value.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.identity()
+
+Returns a new Identity Matrix.
+
+**Returns**: `Matrix4`
+
+
+### Matrix4.nullMatrix()
+
+Returns a new Null Matrix.
+
+**Returns**: `Matrix4`
+
+
+
+* * *
+
+
+
+
+
+
+
+
+
+
+# Plane
+
+
+
+
+
+* * *
+
+### Plane.Plane()
+
+A Plane representation
+
+
+
+### Plane.project()
+
+Project a point onto the plane.
+
+
+
+
+* * *
+
+
+
+
+
+
+
+
+
+

test/matrix2.test.js

 var chai = require('chai');
 var assert = chai.assert;
 var Matrix2 = require('./..').Matrix2;
+var EPSILON = require('./..').Constants.EPSILON;
 
+
+
 describe('Matrix2', function(){
-    it('has data', function(){
+    it('can be constructed from arrays', function(){
         var m = new Matrix2([45, 345, -89, 4]);
+
         assert.equal(m.at(0, 0), 45);
@@ -13,2 +17,101 @@ assert.equal(m.at(0, 1), 345);
     });
+
+    it('is immutable', function(){
+        var data = [45, 345, -89, 4];
+        var m = new Matrix2(data);
+
+        assert(m.data() !== data);
+    });
+
+    it('can be multiplied with vectors', function(){
+        var m = new Matrix2([3, 7, -2, 2]);
+        var v = {
+            x: 3,
+            y: 2
+        };
+        var result = m.mulV(v);
+
+        assert.equal(result.x, 23);
+        assert.equal(result.y, -2);
+    });
+
+    it('can be multiplied by a scalar', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var s = 5;
+        var result = m.mulS(s).data();
+        assert.deepEqual(result, [5, 10, 15, 20]);
+    });
+
+    it('can be divided by a scalar', function(){
+        var m = new Matrix2([5, 10, 15, 20]);
+        var s = 5;
+        var result = m.divS(s).data();
+        assert.deepEqual(result, [1, 2, 3, 4]);
+    });
+
+    it('can be added by a scalar', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var s = 5;
+        var result = m.addS(s).data();
+        assert.deepEqual(result, [6, 7, 8, 9]);
+    });
+
+    it('can be subtracted by a scalar', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var s = 5;
+        var result = m.subS(s).data();
+        assert.deepEqual(result, [-4, -3, -2, -1]);
+    });
+
+    it('multiplied with another 2x2 matrix', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var n = new Matrix2([5, 6, 7, 8]);
+
+        var result = m.mul(n);
+
+        assert.deepEqual(result.data(), [19, 22, 43, 50]);
+    });
+
+    it('can be added to another 2x2 matrix', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var n = new Matrix2([4, 3, 2, 1]);
+        var result = m.add(n);
+        assert.deepEqual(result.data(), [5, 5, 5, 5]);
+    });
+
+    it('can be subtracted by another 2x2 matrix', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var n = new Matrix2([4, 3, 2, 1]);
+        var result = m.sub(n);
+        assert.deepEqual(result.data(), [-3, -1, 1, 3]);
+    });
+
+    it('can calculate its determinant', function(){
+        var m = new Matrix2([1, 2, 3, 4]);
+        var result = m.det();
+        assert.equal(result, -2 );
+    });
+
+    it('can be inverted', function(){
+        var m = new Matrix2([4, 3, 2, 1]);
+        var result = m.inv();
+        assert.deepEqual(result.data(), [-0.5, 1.5, 1, -2]);
+    });
+
+    it('preserves primary invariant of inversion', function(){
+        var m = new Matrix2([5, 8, 4, 3]);
+        var inverted = m.inv();
+        var identity = m.mul(inverted).data();
+
+        assert.closeTo(identity[0], 1, EPSILON);
+        assert.closeTo(identity[1], 0, EPSILON);
+        assert.closeTo(identity[2], 0, EPSILON);
+        assert.closeTo(identity[3], 1, EPSILON);
+    });
+
+    it('returns null if matrix is non invertible', function(){
+        var m = new Matrix2();
+        var result = m.inv();
+        assert.isNull(result);
+    });
 });

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Fixed alerts

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Improved metrics

Total package byte prevSize

57501

increased by724.39%

Number of package files

17

increased by54.55%

Lines of code

1674

increased by1662.11%

Number of low maintenance alerts

2

decreased by-33.33%

Number of medium maintenance alerts

0

decreased by-100%

Number of lines in readme file

561

increased by5000%

Worsened metrics

Dev dependency count

9

increased by12.5%

Number of low supply chain risk alerts

1

increased byInfinity%

Number of medium supply chain risk alerts

2

increased byInfinity%

No dependency changes