SharpGIS

#GIS from a .NET developer's perspective

ESRI ArcGIS Silverlight/WPF API released

FINALLY we released the beta of our new ArcGIS client API for Silverlight and WPF the end of this week.

You can download the beta here, where you also can find links to documentation and samples. Note that the download requires an ESRI global account, which you can create for free.

Art has the details on his blog.

This his has been (well still is since it's beta :-) a great fun project to work on. We tried to design it to be similar to our JavaScript and Flex APIs, but at the same time make it more ".NET" when it made sense, or taken advantage of capabilities Silverlight had. We really look forward to the feedback from you, as well as talking to anyone who's at the ESRI Developer summit next week. I'll be there Monday through Thursday, mostly hanging out at the showcase area, so if you're there, stop by say hi and get to see the API first hand. Art and Rex will be doing an intro session Wednesday at 1pm, and I'll join them Thursday 10:15am for the advanced session.

Below is a simple flickr application that I created for the api, (source is available for download at the code gallery). Just zoom to any area of interest, hit the flickr button, and images in that area pops up. The sample demonstrates the power of templating the symbols which allows you to associate animations to states of the symbols, as well as using binding. This is really no different than the states model used in other Silverlight controls. The flickr symbols here has two states: MouseOver, which zooms the image and displays a small description at the bottom. The result box to the left uses the selection state when you hover on the features to first scale the image slightly and highlight the border, and if you stay hovering on it, will expand to full size. Click the result to center on that feature.

Silverlight 3.0 Pixel shaders

rippleeffect Silverlight 3.0 beta1 was released today. One of the new cool features is the pixel shader support, allowing you to make some really cool effects. I managed to fairly quickly convert the WPF Pixel Shader library to a Silverlight library (except a couple of effects), and successfully apply them to any UIElement.

To save you the trouble, you can grab the source for the library from here: ShaderEffectLibrary.zip (44.65 kb)

To use it, simply import the assembly namespace:

xmlns:fx=”clr-namespace:ShaderEffectLibrary;ShaderEffectLibrary"

and then apply any effect to your elements by setting the Effect property:

<Grid>
    <Grid.Effect>
        <fx:RippleEffect />
    </Grid.Effect>
</Grid>

The supported effects are: BandedSwirl, Bloom, BrightExtract, ColorKeyAlpha, ColorTone, ContrastAdjust, DirectionalBlur, Embossed, Gloom, GrowablePoissonDiskEffect, InvertColor, LightStreak, Magnify, Monochrome, Pinch, Pixelate, Ripple, Sharpen, SmoothMagnify, Swirl, Tone, Toon, and ZoomBlu.

Note that you will need to have the Silverlight 3.0 bits installed to use this.

UPDATE: The WPF Pixel Shader library has now added support for Silverlight as well: http://wpffx.codeplex.com/

Also note that if you want to take advantage of the new GPU hardware acceleration to further enhance performance, this is an opt-in feature! To get it, you have to go to the hosting html page and set the following object parameter (update: This doesn't apply to pixel shaders which are software only):

      <param name=”enableGPUAcceleration” value=”true” />

Also note that pixel shaders are software only, and if you add a shader to your hardware accelerated element, it will switch back to software.