From e44a7e37b6c7b5961adaffc62b9042b8d442938e Mon Sep 17 00:00:00 2001
From: mensonge
Date: Thu, 13 Nov 2008 09:49:11 +0000
Subject: New feature: basic Ajax suggestion for tags and implementation of
 Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
---
 includes/js/dojox/gfx3d/gradient.js | 41 +++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 includes/js/dojox/gfx3d/gradient.js

(limited to 'includes/js/dojox/gfx3d/gradient.js')

diff --git a/includes/js/dojox/gfx3d/gradient.js b/includes/js/dojox/gfx3d/gradient.js
new file mode 100644
index 0000000..fa93720
--- /dev/null
+++ b/includes/js/dojox/gfx3d/gradient.js
@@ -0,0 +1,41 @@
+if(!dojo._hasResource["dojox.gfx3d.gradient"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.gfx3d.gradient"] = true;
+dojo.provide("dojox.gfx3d.gradient");
+
+dojo.require("dojox.gfx3d.vector");
+dojo.require("dojox.gfx3d.matrix");
+
+(function(){
+	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;
+
+	dojox.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 diffirence in colors between gradient steps
+
+		var m = dojox.gfx3d.matrix, v = dojox.gfx3d.vector, 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};
+	};
+})();
+
+}
-- 
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