blend | 易学教程

Why does my colored cube not work with GL_BLEND?

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问题 My cube isn't rendering as expected when I use GL_BLEND. glEnable(GL_CULL_FACE); glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE); I'm also having a similar problem with drawing some semi-opaque vertices in front, which could well be related. Related: Why do my semi-opaque vertices make background objects brighter in OpenGL? Here's what it's supposed to look like: Normal cube http://img408.imageshack.us/img408/2853/normalcube.png And here's what it actually looks like: Dark cube http:/

XAML/Blend dependent data binding

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问题 I want to create a listbox that'll be bound to XPath, relative to the other listbox's currently selected item. It's using XmlDataProvider for the data, and the XML file looks like this: <Programs> <Program name="..."> <Step name="..."/> <Step name="..."/> </Program> <Program name="another"> ... </Programs So, the "parent" listbox is listing out all the programs, while "child" shows only steps from the current program. What's such a type of binding called? 回答1: Here you go. Hope this answers

Set blendmode for drawing strokes?

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问题 I've looked a bit and think the answer to my question is "no", but here goes: With Javascript and a canvas tag, I can draw nicely alpha-blended lines with stroke() . This is loads of fun, but I'd like to take it one step further by setting the blendmode for the stroke. e.g., it looks like it's using the classic src * (alpha) + dst * (1 - alpha), and i'd like something like just src + dst, in order to get additive blending. This page: http://www.andersriggelsen.dk/OpenGL seems to be doing

LightSwitch and Expression Blend - Will they work together?

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问题 how well can LightSwitch work together with Blend? I saw in some videos that you can use custom Silverlight control in LS and naturally I can create them with Blend. But can Blend in itself be used to customize the screens of a LightSwitch application? It seems LS doesn't use Xaml but puts all screen in an application.lsml file which is invalid for Blend. Is there support coming here? Thanks in advance. 回答1: No. You will never be able to customize the LightSwitch 'Screens' in Blend, because

How do you create a crossfade transition between multiple videos in FFMPEG?

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I am currently looping MP4 videos with audio through FFMPEG. Here is the code del intermediate1.ts del f.txt echo file intermediate1.ts>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file intermediate1.ts>>f.txt echo file

ListBox not Virtualizing

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I have a ListBox which is not virtualizing. I am obviously missing something, but cannot find it. It's actually a ListBox within a ListBox. The outer ListBox has an ItemTemplate which contains an Expander. The Expander is used to display a group of items. The content of the Expander is the second ListBox which displays the items. The ItemTemplate on the second ListBox is bound to the actual Item to display. The ViewModel class for my items has a number of properties which do not initialize data until the property Get is called. However, WPF is walking through every item and causing

ColorAnimation Gradient On WPF

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<LinearGradientBrush x:Key="BrushPrincipalBorderBlue" EndPoint="1.3,1" StartPoint="-0.2,0"> <GradientStop Color="#FF030637" Offset="1"/> <GradientStop Color="#FF0E0F31" Offset="0.166"/> <GradientStop Color="#FF2E2F70" Offset="0.629"/> <GradientStop Color="#FF030637" Offset="0.63"/> </LinearGradientBrush> <Storyboard x:Key="GoToBlue"> <ColorAnimation Storyboard.TargetName="border" Storyboard.TargetProperty="Background.GradientStops[3].Color" Duration="0:0:0.5" To="{DynamicResource BrushPrincipalBorderBlue.GradientStops[3].Color}" /> </Storyboard> How i can Set in the 'To' property to an

Theming using resources without Blend vomitting

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WPF is great in that I should be able to use {StaticResource MyBackground} instead of "White" throughout my app, and then by changing resource definitions redefine the look of my entire application. Problem is Expression Blend just won't work if you have references to global resources in a subcontrol. Is there any other way of theme-ing your app? I am not willing to lose Blend designer support, or replicate a piece of code/xaml in every single control. I find it astounding that they have not fixed a bug of this magnitude. Any ideas? Cheers So I haven't tried this, but it sounds like it would

<i: Interaction.Behavior> option is not coming for applying beahviour

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问题 I have been trying to implement a behavior on a wpf window therefore I have added reference to System.Winodws.Interactivity in my current solution and then wrote the desired behavior. but in order to apply this behavior, I have to write something like this in Windows XAML. <Window x:Class="WpfApplication5.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525" xmlns:behav =

providing designtime ViewModel data for Blend and VS

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In a MVVM based application, what options do I have to provide ViewModel data at design time, so our designers can actually see something in Blend3 (and VS 2008). How are you doing this? Can I utilize mc:ignorable for this somehow? Yes, Expression Blend can help you with this. Use the "Data" tab to create sample data that has the same shape as your production data. When you create the data source, be sure to uncheck "Enable sample data when application is running". Sample Data http://www.smips.com/brad/stackoverflow/design-model1.jpg After you've created your sample data, set the DataContext