1 files changed, 39 insertions, 0 deletions
diff --git a/js/dojo/dojox/gfx3d/gradient.js b/js/dojo/dojox/gfx3d/gradient.js
new file mode 100644
index 0000000..4d8e9ef
--- /dev/null
+++ b/js/dojo/dojox/gfx3d/gradient.js
@@ -0,0 +1,39 @@
+//>>built
+define("dojox/gfx3d/gradient", ["dojo/_base/lang","./matrix","./vector"], 
+	function(lang,m,v){
+
+	var gfx3d = lang.getObject("dojox.gfx3d",true);
+
+	var dist = function(a, b){ return Math.sqrt(Math.pow(b.x - a.x, 2) + Math.pow(b.y - a.y, 2)); };
+	var N = 32;
+
+	gfx3d.gradient = function(model, material, center, radius, from, to, matrix){
+		// summary: calculate a cylindrical gradient
+		// model: dojox.gfx3d.lighting.Model: color model
+		// material: Object: defines visual properties
+		// center: Object: center of the cylinder's bottom
+		// radius: Number: radius of the cylinder
+		// from: Number: from position in radians
+		// to: Number: from position in radians
+		// matrix: dojox.gfx3d.Matrix3D: the cumulative transformation matrix
+		// tolerance: Number: tolerable difference in colors between gradient steps
+
+		var mx = m.normalize(matrix),
+			f = m.multiplyPoint(mx, radius * Math.cos(from) + center.x, radius * Math.sin(from) + center.y, center.z),
+			t = m.multiplyPoint(mx, radius * Math.cos(to)   + center.x, radius * Math.sin(to)   + center.y, center.z),
+			c = m.multiplyPoint(mx, center.x, center.y, center.z), step = (to - from) / N, r = dist(f, t) / 2,
+			mod = model[material.type], fin = material.finish, pmt = material.color,
+			colors = [{offset: 0, color: mod.call(model, v.substract(f, c), fin, pmt)}];
+
+		for(var a = from + step; a < to; a += step){
+			var p = m.multiplyPoint(mx, radius * Math.cos(a) + center.x, radius * Math.sin(a) + center.y, center.z),
+				df = dist(f, p), dt = dist(t, p);
+			colors.push({offset: df / (df + dt), color: mod.call(model, v.substract(p, c), fin, pmt)});
+		}
+		colors.push({offset: 1, color: mod.call(model, v.substract(t, c), fin, pmt)});
+
+		return {type: "linear", x1: 0, y1: -r, x2: 0, y2: r, colors: colors};
+	};
+
+	return gfx3d.gradient;
+});
+\ No newline at end of file