source: Dev/trunk/src/client/dojox/charting/themes/ThreeD.js

define(["dojo/_base/lang", "dojo/_base/array", "../Theme", "./gradientGenerator", "./PrimaryColors", "dojo/colors" /* for sanitize */, "./common"],
        function(lang, ArrayUtil, Theme, gradientGenerator, PrimaryColors, themes){

        var colors = ["#f00", "#0f0", "#00f", "#ff0", "#0ff", "#f0f", "./common"],      // the same is in PrimaryColors
                defaultFill = {type: "linear", space: "shape", x1: 0, y1: 0, x2: 100, y2: 0},
                // 3D cylinder map is calculated using dojox.gfx3d
                cyl3dMap = [
                        {o: 0.00, i: 174}, {o: 0.08, i: 231}, {o: 0.18, i: 237}, {o: 0.30, i: 231},
                        {o: 0.39, i: 221}, {o: 0.49, i: 206}, {o: 0.58, i: 187}, {o: 0.68, i: 165},
                        {o: 0.80, i: 128}, {o: 0.90, i: 102}, {o: 1.00, i: 174}
                ],
                hiliteIndex = 2, hiliteIntensity = 100,
                cyl3dFills = ArrayUtil.map(colors, function(c){
                        var fill = lang.delegate(defaultFill),
                                colors = fill.colors = gradientGenerator.generateGradientByIntensity(c, cyl3dMap),
                                hilite = colors[hiliteIndex].color;
                        // add highlight
                        hilite.r += hiliteIntensity;
                        hilite.g += hiliteIntensity;
                        hilite.b += hiliteIntensity;
                        hilite.sanitize();
                        return fill;
                });

        themes.ThreeD = PrimaryColors.clone();
        themes.ThreeD.series.shadow = {dx: 1, dy: 1, width: 3, color: [0, 0, 0, 0.15]};

        themes.ThreeD.next = function(elementType, mixin, doPost){
                if(elementType == "bar" || elementType == "column"){
                        // custom processing for bars and columns: substitute fills
                        var index = this._current % this.seriesThemes.length,
                                s = this.seriesThemes[index], old = s.fill;
                        s.fill = cyl3dFills[index];
                        var theme = Theme.prototype.next.apply(this, arguments);
                        // cleanup
                        s.fill = old;
                        return theme;
                }
                return Theme.prototype.next.apply(this, arguments);
        };
        
        return themes.ThreeD;
});