Microsoft Silverlight 技术实现的3D示例

The basic way the Polyhedron animation works in this app is as follows: (1) A graph describing how the faces are connected is loaded from a resource (2) This graph is used to generate a two dimensional Net - basically the equivalent of a cardboard cut-out. (3) This Net is then used to generate Faces in 3 dimensions that can be folded to form the final Polyhedron (4) This Polyhedron is then "projected" onto the xaml canvas using a perspective transformation. The z-order of the polygons corresponding to the individual faces is set so that they draw from back to front. They are made semi-transparent so you can see the whole solid. The xaml for the wheel of polyhedrons in Page1.xaml is auto-generated using code similar to this app with Projector.Project replaced with a Project.ProjectToXaml. I had quite a bit of fun using Storyboards in this app to fade-in and magnify the currently selected Polyhedron and to rotate the arrow on the cycle button. Triggers are only available for the Load event in this Alpha. All other events have to be wired manually to storyboards. Watch out for the MouseEnter event which is generated multiple times (so a flag is needed to prevent the Storyboard reseting continuously). You are welcome to use most of the code in this app as you see fit. The DirectX Math emulation library is probably the most reusable part and is available under the GNU Lesser General Public License. Most of the rest of the app is copyright free. However I'm retaining copyright on Graphs.cs, Net.cs and Polyhedron.cs because I use more elaborate version of these in another app. (Please don't use them without permission.) Have fun with Silverlight. I certainly did. Declan Brennan declan@brennan.name