factor out zip3 into src/lib/

Author: etpinard

src/lib/zip3.js

@@ -0,0 +1,17 @@
+/**
+* Copyright 2012-2018, Plotly, Inc.
+* All rights reserved.
+*
+* This source code is licensed under the MIT license found in the
+* LICENSE file in the root directory of this source tree.
+*/
+
+'use strict';
+
+module.exports = function zip3(x, y, z) {
+    var result = new Array(x.length);
+    for(var i = 0; i < x.length; i++) {
+        result[i] = [x[i], y[i], z[i]];
+    }
+    return result;
+};

src/traces/cone/convert.js

@@ -14,6 +14,7 @@ var createConeMesh = require('gl-cone3d').createConeMesh;
 
 var simpleMap = require('../../lib').simpleMap;
 var parseColorScale = require('../../lib/gl_format_color').parseColorScale;
+var zip3 = require('../../lib/zip3');
 
 function Cone(scene, uid) {
     this.scene = scene;
@@ -52,14 +53,6 @@ proto.handlePick = function(selection) {
     }
 };
 
-function zip3(x, y, z) {
-    var result = new Array(x.length);
-    for(var i = 0; i < x.length; i++) {
-        result[i] = [x[i], y[i], z[i]];
-    }
-    return result;
-}
-
 var axisName2scaleIndex = {xaxis: 0, yaxis: 1, zaxis: 2};
 var sizeMode2sizeKey = {scaled: 'coneSize', absolute: 'absoluteConeSize'};
 var anchor2coneOffset = {tip: 1, tail: 0, cm: 0.25, center: 0.5};

src/traces/mesh3d/convert.js

@@ -16,6 +16,7 @@ var convexHull = require('convex-hull');
 
 var parseColorScale = require('../../lib/gl_format_color').parseColorScale;
 var str2RgbaArray = require('../../lib/str2rgbarray');
+var zip3 = require('../../lib/zip3');
 
 function Mesh3DTrace(scene, mesh, uid) {
     this.scene = scene;
@@ -54,14 +55,6 @@ function parseColorArray(colors) {
     return colors.map(str2RgbaArray);
 }
 
-function zip3(x, y, z) {
-    var result = new Array(x.length);
-    for(var i = 0; i < x.length; ++i) {
-        result[i] = [x[i], y[i], z[i]];
-    }
-    return result;
-}
-
 proto.update = function(data) {
     var scene = this.scene,
         layout = scene.fullSceneLayout;

src/traces/streamtube/convert.js

@@ -13,6 +13,7 @@ var createTubeMesh = tube2mesh.createTubeMesh;
 
 var simpleMap = require('../../lib').simpleMap;
 var parseColorScale = require('../../lib/gl_format_color').parseColorScale;
+var zip3 = require('../../lib/zip3');
 
 function Streamtube(scene, uid) {
     this.scene = scene;
@@ -44,14 +45,6 @@ proto.handlePick = function(selection) {
     }
 };
 
-function zip3(x, y, z) {
-    var result = new Array(x.length);
-    for(var i = 0; i < x.length; ++i) {
-        result[i] = [x[i], y[i], z[i]];
-    }
-    return result;
-}
-
 var axisName2scaleIndex = {xaxis: 0, yaxis: 1, zaxis: 2};
 
 function convert(scene, trace) {