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  • OpenGL : Keeping alpha in a render buffer

    - by Cyan
    In my current task, i need to render a texture into a render buffer, in order to work on it (apply special filters) there. The result is then considered a "new texture", which is later displayed. This works fine, except when the texture contains some transparent/semi-transparent parts. My current guess it that, within the render buffer, the texture is "merged" with a kind of "grey background". In this case, it obviously impacts the R,G,B color components of transparent pixels. I've yet to find a way around this. Even manually assigning alpha after the rendering process doesn't save the day for semi-transparent pixels, which RGB are "tainted" by the grey background.

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  • Inheritance of templates in WPF

    - by Alxandr
    I'm trying to make sure that every child of a given element (MPF.MWindow) gets custom templates. For instance, the button should get the template defined in resMButton.xaml. As of now I'm using the following code on: (resMWindow.xaml) <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MPF"> <Style x:Key="SystemKeyAnimations" TargetType="{x:Type Button}"> <Setter Property="Opacity" Value="0.5" /> <Setter Property="Background" Value="Transparent" /> <Style.Triggers> <EventTrigger RoutedEvent="Mouse.MouseEnter"> <BeginStoryboard> <Storyboard> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="Opacity"> <SplineDoubleKeyFrame KeyTime="00:00:00.2" Value="1.0" /> </DoubleAnimationUsingKeyFrames> </Storyboard> </BeginStoryboard> </EventTrigger> <EventTrigger RoutedEvent="Mouse.MouseLeave"> <BeginStoryboard> <Storyboard> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="Opacity"> <SplineDoubleKeyFrame KeyTime="00:00:00.2" Value="0.5" /> </DoubleAnimationUsingKeyFrames> </Storyboard> </BeginStoryboard> </EventTrigger> </Style.Triggers> </Style> <Style TargetType="{x:Type local:MWindow}"> <!-- Remove default frame appearance --> <Setter Property="WindowStyle" Value="None" /> <Setter Property="AllowsTransparency" Value="True" /> <Setter Property="Background" Value="Transparent" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:MWindow}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" x:Name="ChromeBorder"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="4" /> <ColumnDefinition /> <ColumnDefinition Width="4" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="4" /> <RowDefinition /> <RowDefinition Height="4" /> </Grid.RowDefinitions> <Thumb Grid.Row="0" Grid.Column="1" x:Name="TopThumb" Cursor="SizeNS" BorderThickness="4" BorderBrush="Transparent" /> <Thumb Grid.Row="2" Grid.Column="1" x:Name="BottomThumb" Cursor="SizeNS" BorderThickness="4" BorderBrush="Transparent" /> <Thumb Grid.Row="1" Grid.Column="0" x:Name="LeftThumb" Cursor="SizeWE" BorderThickness="4" BorderBrush="Transparent" /> <Thumb Grid.Row="1" Grid.Column="2" x:Name="RightThumb" Cursor="SizeWE" BorderThickness="4" BorderBrush="Transparent" /> <Thumb Grid.Row="0" Grid.Column="0" x:Name="TopLeftThumb" Cursor="SizeNWSE" BorderThickness="5" BorderBrush="Transparent" /> <Thumb Grid.Row="0" Grid.Column="2" x:Name="TopRightThumb" Cursor="SizeNESW" BorderThickness="5" BorderBrush="Transparent" /> <Thumb Grid.Row="2" Grid.Column="0" x:Name="BottomLeftThumb" Cursor="SizeNESW" BorderThickness="5" BorderBrush="Transparent" /> <Thumb Grid.Row="2" Grid.Column="2" x:Name="BottomRightThumb" Cursor="SizeNWSE" BorderThickness="5" BorderBrush="Transparent" /> <Grid Grid.Row="1" Grid.Column="1"> <Grid.RowDefinitions> <RowDefinition Height="20" /> <RowDefinition /> </Grid.RowDefinitions> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition /> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> <StackPanel Orientation="Horizontal" Grid.Column="1"> <Button Command="local:WindowCommands.Minimize" Style="{StaticResource ResourceKey=SystemKeyAnimations}"> <Button.Template> <ControlTemplate> <Canvas Width="10" Height="10" Margin="5" Background="Transparent"> <Line X1="0" X2="10" Y1="5" Y2="5" Stroke="White" StrokeThickness="2" /> </Canvas> </ControlTemplate> </Button.Template> </Button> <Button Command="local:WindowCommands.Maximize" x:Name="MaximizeButton" Style="{StaticResource ResourceKey=SystemKeyAnimations}"> <Button.Template> <ControlTemplate> <Canvas Width="10" Height="10" Margin="5" Background="Transparent"> <Rectangle Width="10" Height="10" Stroke="White" StrokeThickness="2" /> </Canvas> </ControlTemplate> </Button.Template> </Button> <Button Command="ApplicationCommands.Close" Style="{StaticResource ResourceKey=SystemKeyAnimations}"> <Button.Template> <ControlTemplate> <Canvas Width="10" Height="10" Margin="5" Background="Transparent"> <Line X1="0" X2="10" Y1="0" Y2="10" Stroke="White" StrokeThickness="2" /> <Line X1="10" X2="0" Y1="0" Y2="10" Stroke="White" StrokeThickness="2" /> </Canvas> </ControlTemplate> </Button.Template> </Button> </StackPanel> <ContentControl x:Name="TitleContentControl"> <TextBlock Text="{TemplateBinding Title}" Foreground="DarkGray" Margin="5,0" /> </ContentControl> </Grid> <ContentPresenter Content="{TemplateBinding Content}" Grid.Row="1"> <ContentPresenter.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="/MPF;component/Themes/resMWindowContent.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </ContentPresenter.Resources> </ContentPresenter> </Grid> </Grid> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> As you can see during the ContentPresenter which gets the content of the window I merge in a dicrionary called resMWindowContent.xaml. The resMWindowContent.xaml looks as following: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MPF"> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="/MPF;component/Themes/resMButton.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> It simply merges in the resMButton.xaml dictionary (this is done because in the feature I will have MTextBox, mList... and I want to separate them). The resMButton.xaml looks as following: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MPF"> <Style TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Grid Background="Transparent"> <Rectangle Stroke="{TemplateBinding BorderBrush}" StrokeThickness="{TemplateBinding BorderThickness}" Fill="{TemplateBinding Background}" /> <ContentPresenter Content="{TemplateBinding Content}" Margin="3" /> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> A simple template drawing a square button. However, it isn't applied at all. My buttons remain normal, and I don't understand what I'm doing wrong. I just want every button inside the MWindow to get a special style (and in time every textbox and so forth). How do I achieve this? One note though: It's important that the styles doesn't apply to elements outside an MWindow.

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  • Transparent proxying - how to pass socket to local server without modification?

    - by Luca Farber
    Hello, I have a program that listens on port 443 and then redirects to either an SSH or HTTPS local server depending on the detected protocol. The program does this by connecting to the local server and proxying all data back and forth through its own process. However, this causes the originating host on the local servers to be logged as localhost. Is there any way to pass the socket directly to the local server process (rather than just making a new TCP connection) so that the parameters of sockaddr_in (or sockaddr_in6) will be retained? Platform for this is Linux.

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  • How can I click a button behind a transparent UIView?

    - by Sean Clark Hess
    Let's say we have a view controller with one sub view. the subview takes up the center of the screen with 100 px margins on all sides. We then add a bunch of little stuff to click on inside that subview. We are only using the subview to take advantage of the new frame ( x=0, y=0 inside the subview is actually 100,100 in the parent view). Then, imagine that we have something behind the subview, like a menu. I want the user to be able to select any of the "little stuff" in the subview, but if there is nothing there, I want touches to pass through it (since the background is clear anyway) to the buttons behind it. How can I do this? It looks like touchesBegan goes through, but buttons don't work.

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  • My framework will utilise other frameworks, but I'd like this to be transparent to the end-user

    - by d11wtq
    I'm building a framework, which aims to provide a new development environment for the user, but I need to use things like RegexKit and almost certainly some other established frameworks in order to do this. Any functionality exposed from such frameworks would be abstracted through classes and methods in my own framework for maintenance reasons (allowing me to change my mind on which dependencies I want). In an ideal world I just want to ship a single .framework. However I'm aware that unlike with standard bundles and applications it is not possibile to embed a framework inside the framework bundle. Do I have any other option other than to tell the end user that they must also install RegexKit and any other dependencies? I have a feeling this lessens the appeal value of the easy to use embedded framework I'd envisaged building. Right now I'm feeling like I have some limited options: Force the user to install the dependencies. Write my own classes that provide the same functionality -- ugh! If at all possible, try to statically link the third party frameworks (is this possible??) My end-product is ideally a single .framework bundle that uses @rpath and so can be installed in the system or simply bundled with the app that uses it.

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  • Tranparent animated image in webview

    - by Amit Battan
    Hi All I am using animated image (gif image) in webview but problem is that it showing while background for transparent image. even I set the background color of webview is transparent. Is any way to do it transparent or any other way to show transparent animated image in Iphone SDk Thanks Amit Battan

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  • C# GDI - How to check if a Pixel is opaque or not?

    - by rkawano
    I am using a method to get a pixel of the image to check if this point is transparent or not. I am using GetPixel that returns a System.Drawing.Color with a 32bit color info. This struct have the "A" property where I can get the alpha value of pixel, according to this MSDN topic. Code: using (Bitmap bmp = new Bitmap(path)) { Color pixel = bmp.GetPixel(0, 0); if (pixel.A == 0) // This is a fully transparent pixel else // This is not a fully transparent pixel } When I use this method with a fully transparent PNG images it returns 0. When I run with a white semi-transparent images, it will give me other values starting on 1 and up to 86, where 86 are given for images with a 100% alfa (full opaque). But with opaque JPEG images, the "A" property are giving me all sort of values like 56, 71, 86, 129, and others, depending on image. But these pixels are fully opaques! How are the correct way to check if a pixel is opaque or not?

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  • How to Find Intersections with Ellipses in PGF/TikZ

    - by infblnpf
    Hello, I am trying to display a sphere in PGF/TikZ to illustrate the idea of great circles. The code for my current result is: \begin{tikzpicture} \tikzfading[name=fade right, left color=transparent!20, right color=transparent!90] \tikzfading[name=fade out, inner color=transparent!100, outer color=transparent!10] \tikzfading[name=fade right gc, left color=transparent!0, right color=transparent!70] \draw [<->, dashed] (0,-5) -- (0,5); % y-axis \draw [->, dashed] (0, 0) -- (20:5); % x-axis \draw [->, dashed] (0, 0) -- (200:5); % x-axis \draw [->, dashed] (0, 0) -- (340:5); % z-axis \draw [->, dashed] (0, 0) -- (160:5); % z-axis \fill [color=cyan, opacity=0.15, path fading=fade out] (0,0) circle (4cm); % bounding circle \fill [color=cyan, opacity=0.25, path fading=fade right, fading angle=90] (0,0) ellipse (4cm and 1cm); % x-y-axis area % great circle 1 \draw [rotate=-40, color=red, path fading=fade right gc, fading angle=40] (0,0) ellipse (4cm and 1cm); % great circle 2 \draw[rotate=5, color=red, path fading=fade right gc, fading angle=5] (0,0) ellipse (1.5cm and 4cm); \end{tikzpicture} How do I find the two points of intersection of the two red ellipses (commented as great circle 1 and 2), find the point of intersection of a line (originating at the center (0,0)) with a ellipse, and place a little circle or rectangle there? Placing a little circle or rectangle there is not an issue. Thank you very much!

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  • How to merge two icons together? (overlay one icon on top of another)

    - by demoncodemonkey
    I've got two 16x16 RGB/A .ICO icon files, each loaded into a separate System.Drawing.Icon object. How would you create a new Icon object containing the merge of the two icons (one overlaid on top of the other)? Edit: I probably wasn't too clear, I don't want to blend two images into each other, I want to overlay one icon on top of another. I should add that the icons already contain transparent parts and I do not need any transparent "blending" to make both icons visible. What I need is to overlay the non-transparent pixels of one icon over the top of another icon. The transparent pixels should let the background icon show through. For example, look at the stackoverflow icon. It has some areas that are grey and orange, and some areas that are totally transparent. Imagine you want to overlay the SO icon on top of the Firefox icon. You would see the greys and oranges of the SO icon in full colour, and where the SO icon is transparent, you would see those parts of the Firefox icon.

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  • Getting the number of posts a user has by the number of rows returned?

    - by transparent
    So I have a question. I have chatting/IM website that I am working on and I was making a user profile page. I wanted to show how many posts that user had. Another issue I had earlier was that when I called a certain value it would return a 'Resource #1' type string. But I got that working by using $totalposts=mysql_query("SELECT * FROM `posts` WHERE Username='" . $username . "'"); $totalposts = mysql_fetch_row($totalposts); $totalposts = $totalposts[0]; But that just returns the last postID of the most recent post. I thought that mysql_num_rows would work. But this code returns an error (example with numbers): 29: $totalposts=mysql_query("SELECT * FROM `posts` WHERE Username='" . $username . "'"); 30: $totalposts = mysql_num_rows($totalposts); 31: $totalposts =mysql_fetch_row($totalposts); 32: $totalposts = $totalposts[0]; That returns this error: Warning: mysql_fetch_row(): supplied argument is not a valid MySQL result resource in /home/a9091503/public_html/im/user.php on line 31 Thanks guys. :) I hope you can figure this out. :D

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  • Internet Explorer 8 Standards Mode Results In Broken Blank Page

    - by Agent_9191
    I'm running into a weird issue that I'm struggling to figure out what's causing the page to break. I have an internal website that's still under development (thus no link to the page) that works great in Firefox and Internet Explorer 8 in IE 7 Standards mode. But when I force it to IE 8 Standards mode the page will only display the title text in the browser tab and an otherwise completely blank page. It seems so broken that the blank page doesn't even have a context menu. The page generally looks like this: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta content="IE=8" http-equiv="X-UA-Compatible" /> <title>Page Title</title> <link rel="shortcut icon" href="/Images/favicon.ico" type="image/x-icon" /> <link href="/Style/main.less" rel="stylesheet" type="text/css" /> </head> <body> ... </body> </html> You may notice the .less extension for the stylesheet. This is an ASP.NET MVC application and I'm making use of DotLess. I have the HttpHandler hooked up for it in the web.config. Of course there's some additional info on the page, but (in theory) it shouldn't be causing this issue. I've run the CSS and the HTML through the W3C validators and both have come back as completely valid. I'm trying the arduous task of removing/re-adding elements until it displays, but any insight into what could cause this would help. EDIT: it appears to be something related to the DotLess stylesheet. The resulting CSS is valid according to the W3C CSS validator. EDIT 2: Digging further, and making use of IE's Developer Tools to control the styles, it appears that IE is reading a single statement twice even though it only occurs once in the output. Here's the output of the Less file: a, abbr, acronym, address, applet, b, big, caption, center, cite, code, dd, dfn, div, dl, dt, em, fieldset, font, form, html, i, iframe, img, kbd, label, legend, li, object, pre, s, samp, small, span, strike, strong, sub, sup, tbody, td, tfoot, th, thead, tr, tt, u, var { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; } blockquote, q { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; quotes: none; } body { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; line-height: 1; width: 100%; background: #efebde; min-width: 600px; } del { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; text-decoration: line-through; } h1 { border: 0; outline: 0; vertical-align: baseline; background: transparent; font-size: 2em; margin: .8em 0 .2em 0; padding: 0; } h2 { border: 0; outline: 0; vertical-align: baseline; background: transparent; font-size: 1.8em; margin: .8em 0 .2em 0; padding: 0; } h3 { border: 0; outline: 0; vertical-align: baseline; background: transparent; font-size: 1.6em; margin: .8em 0 .2em 0; padding: 0; } h4 { margin: 0; padding: 0; border: 0; outline: 0; vertical-align: baseline; background: transparent; font-size: 1.4em; } h5 { margin: 0; padding: 0; border: 0; outline: 0; vertical-align: baseline; background: transparent; font-size: 1.2em; } h6 { margin: 0; padding: 0; border: 0; outline: 0; vertical-align: baseline; background: transparent; font-size: 1em; } ins { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; text-decoration: none; } ol, ul { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; list-style: none; } p { border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; margin: .4em 0 .8em 0; padding: 0; } table { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; border-collapse: collapse; border-spacing: 0; } blockquote:before, blockquote:after, q:before, q:after { content: none; } :focus { outline: 0; } .bold { font-weight: bold; } .systemFont { font-family: Arial; } .labelled { font-style: italic; } .groovedBorder { border-color: #adaa9c; border-style: groove; border-width: medium; } #header, #footer { clear: both; float: left; width: 100%; } #header p, #header h1, #header h2 { padding: .4em 15px 0 15px; margin: 0; } #header ul { clear: left; float: left; width: 100%; list-style: none; margin: 10px 0 0 0; padding: 0; } #header ul li { display: inline; list-style: none; margin: 0; padding: 0; } #header ul li a { background: #eeeeee; display: block; float: left; left: 15px; line-height: 1.3em; margin: 0 0 0 1px; padding: 3px 10px; position: relative; text-align: center; text-decoration: none; } #header ul li a span { display: block; } #header ul li a:hover { background: #336699; } #header ul li a.active, #header ul li a.active:hover { background: black; font-weight: bold; } #header #logindisplay { float: right; padding-top: .5em; padding-bottom: .5em; padding-right: 1em; padding-left: 1em; } #title h1 { font-family: Arial; font-style: italic; font-size: 175%; text-align: center; margin-top: 1%; } .col1 { font-family: Arial; border-color: #adaa9c; border-style: groove; border-width: medium; min-height: 350px; float: left; overflow: hidden; position: relative; padding-top: 0; padding-bottom: 1em; padding-left: 0; padding-right: 0; } .col1 div.logo { text-align: center; } .col3 { font-family: Arial; border-color: #adaa9c; border-style: groove; border-width: medium; float: left; overflow: hidden; position: relative; } #layoutdims { clear: both; background: #eeeeee; margin: 0; padding: 6px 15px !important; text-align: right; } #company { padding-left: 10px; padding-top: 10px; margin: 0; } #company span { display: block; padding-left: 1em; } #version { padding-right: 1em; padding-top: 1em; text-align: center; } #menu li { padding: 6px; border-color: #adaa9c; border-style: groove; border-width: medium; min-width: 108px; } #menu li a.ciApp { text-decoration: none; font-size: 112.5%; font-weight: bold; font-family: Arial; color: black; } #menu li a.ciApp span { vertical-align: top; } .welcomemessage { font-size: 60.95%; } .newFeatures { overflow-y: scroll; max-height: 300px; } #newsfeed div .newsLabel { color: red; font-size: 60.95%; font-style: italic; } /************************************************************************************** This statement appears twice in Developer Tools. Disabling one disables both. Disabling it also causes the page to render. Turning it on and the page disappears again **************************************************************************************/ #newsfeed div .newFeatures { margin-left: 1em; margin-right: 1em; font-size: 60.95%; } /************************************************************************************** **************************************************************************************/ .colmask { clear: both; float: left; position: relative; overflow: hidden; width: 100%; } .colright, .colmid, .colleft { float: left; position: relative; width: 100%; } .col2 { float: left; overflow: hidden; position: relative; padding-top: 0; padding-bottom: 1em; padding-left: 0; padding-right: 0; } .threecol .colmid { right: 33%; } .threecol .colleft { right: 34%; } .threecol .col1 { width: 33%; left: 100%; } .threecol .col2 { width: 32%; left: 34%; } .threecol .col3 { width: 32%; left: 68.5%; } Notice the #newsfeed div .newFeatures identifier near the end. I don't know what's causing that as it's only appearing once in the output stream. Here's an image of it too: EDIT 3: It appears that even though it duplicates that particular selector, if I change the font-size to a whole number like 61% instead of the current 60.95% (that specific to defaultly match the existing desktop app as closely as possible) it works fine. So something specific to IE duplicating that selector block and the font-size being a percentage specific to two decimal places appears to kill IE8 Standards mode completely.

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  • Convert TIFF with Alpha Channel to PNG?

    - by Michael Stum
    I have a TIFF File that has a blue background and an Alpha Channel. I would like to save a PNG File which has the blue background transparent, using the Alpha Channel (because some pixels are not fully transparent) I use Photoshop CS5 Standard, but I haven't found an option there. I don't want to use the Magic Wand because it struggles with half-transparent pixels and because I do have a perfect Alpha Channel. Any ideas how this can be done?

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  • TDE Tablespace Encryption 11.2.0.1 Certified with EBS 12

    - by Steven Chan
    Oracle Advanced Security is an optional licenced Oracle 11g Database add-on.  Oracle Advanced Security Transparent Data Encryption (TDE) offers two different features:  column encryption and tablespace encryption.  11.2.0.1 TDE Column encryption was certified with E-Business Suite 12 as part of our overall 11.2.0.1 database certification.  As of today, 11.2.0.1 TDE Tablespace encryption is now certified with Oracle E-Business Suite Release 12. What is Transparent Data Encryption (TDE) ? Oracle Advanced Security Transparent Data Encryption (TDE) allows you to protect data at rest. TDE helps address privacy and PCI requirements by encrypting personally identifiable information (PII) such as Social Security numbers and credit card numbers. TDE is completely transparent to existing applications with no triggers, views or other application changes required. Data is transparently encrypted when written to disk and transparently decrypted after an application user has successfully authenticated and passed all authorization checks. Authorization checks include verifying the user has the necessary select and update privileges on the application table and checking Database Vault, Label Security and Virtual Private Database enforcement policies.

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  • How to get tilemap transparency color working with TiledLib's Demo implementation?

    - by Adam LaBranche
    So the problem I'm having is that when using Nick Gravelyn's tiledlib pipeline for reading and drawing tmx maps in XNA, the transparency color I set in Tiled's editor will work in the editor, but when I draw it the color that's supposed to become transparent still draws. The closest things to a solution that I've found are - 1) Change my sprite batch's BlendState to NonPremultiplied (found this in a buried Tweet). 2) Get the pixels that are supposed to be transparent at some point then Set them all to transparent. Solution 1 didn't work for me, and solution 2 seems hacky and not a very good way to approach this particular problem, especially since it looks like the custom pipeline processor reads in the transparent color and sets it to the color key for transparency according to the code, just something is going wrong somewhere. At least that's what it looks like the code is doing. TileSetContent.cs if (imageNode.Attributes["trans"] != null) { string color = imageNode.Attributes["trans"].Value; string r = color.Substring(0, 2); string g = color.Substring(2, 2); string b = color.Substring(4, 2); this.ColorKey = new Color((byte)Convert.ToInt32(r, 16), (byte)Convert.ToInt32(g, 16), (byte)Convert.ToInt32(b, 16)); } ... TiledHelpers.cs // build the asset as an external reference OpaqueDataDictionary data = new OpaqueDataDictionary(); data.Add("GenerateMipMaps", false); data.Add("ResizetoPowerOfTwo", false); data.Add("TextureFormat", TextureProcessorOutputFormat.Color); data.Add("ColorKeyEnabled", tileSet.ColorKey.HasValue); data.Add("ColorKeyColor", tileSet.ColorKey.HasValue ? tileSet.ColorKey.Value : Microsoft.Xna.Framework.Color.Magenta); tileSet.Texture = context.BuildAsset<Texture2DContent, Texture2DContent>( new ExternalReference<Texture2DContent>(path), null, data, null, asset); ... I can share more code as well if it helps to understand my problem. Thank you.

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  • Performance issues with visibility detection and object transparency

    - by maul
    I'm working on a 3d game that has a view similar to classic isometric games (diablo, etc.). One of the things I'm trying to implement is the effect of turning walls transparent when the player walks behind them. By itself this is not a huge issue, but I'm having trouble determining which walls should be transparent exactly. I can't use a circle or square mask. There are a lot of cases where the wall piece at the same (relative) position has different visibility depending on the surrounding area. With the help of a friend I came up with this algorithm: Create a grid around the player that contains a lot of "visibility points" (my game is semi tile-based so I create one point for every tile on the grid) - the size of the square's side is close to the radius where I make objects transparent. I found 6x6 to be a good value, so that's 36 visibility points total. For every visibility point on the grid, check if that point is in the player's line of sight. For every visibility point that is in the LOS, cast a ray from the camera to that point and mark all objects the ray hits as transparent. This algorithm works - not perfectly, but only requires some tuning - however this is very slow. As you can see, it requries 36 ray casts minimum, but most of the time 60-70 depending on the position. That's simply too much for the CPU. Is there a better way to do this? I'm using Unity 3D but I'm not looking for an engine-specific solution.

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  • How to hide the mouse cursor

    - by MvG
    I'm building a kiosk using Ubuntu Precise on a touch screen. Now I'm looking for the appropriate way to make the mouse cursor disappear. As people know where they are pointing, displaying an arrow under their finger is useless, and having an error where they last pointed even more so. My best bet would be some kind of cursor theme consisting only of transparent cursors. I'm a bit surprised to find no UI to switch and maybe install cursor themes the default Unity UI, but as I won't be using Unity, that's not much of a problem. It appears that the alternatives listed in update-alternatives --list x-cursor-theme all refer to .theme files, so I searched the package list for those. The resulting list does not list any likely candidates, i.e. no packages containing “invisible” or “transparent” in their name. So far, some googled result yielding a readme for “XCursor Transparent Theme” is my best bet. That would mean compiling those sources myself, perhaps putting them into my PPA. I'm also a bit sceptical about that result as said readme is dated from 2003. And I'm not sure that I'm not making things overly complicated. After all, there is quite some support in Precise for touch devices, so I don't believe I'm the first one who wants to get rid of his mouse cursor. Is there another way which doesn't involve user-compiled binary code? Is there a theme package for transparent cursors which I've overlooked? Is there some other mechanism to make the cursor disappear without changing the cursor theme? I'll be using Matchbox WM, Firefox and Java applets, so I'll be happy with any solution working under such a setup. I'm not interested in any solutions twiddling with Gnome or Compiz, as I'll not be running either.

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  • Collision detection with non-rectangular images

    - by Adam Smith
    I'm creating a game and I need to detect collisions between a character and some parts of the environment. Since my character's frames are taken from a sprite sheet with a transparent background, I'm wondering how I should go about detecting collisions between a wall and my character only if the colliding parts are non-transparent in both images. I thought about checking only if part of the rectangle the character is in touches the rectangle a tile is in and comparing the alpha channels, but then I have another choice to make... Either I test every single pixel against every single pixel in the other image and if one is true, I detect a collision. That would be terribly ineficient. The other option would be to keep a x,y position of the leftmost, rightmost, etc. non-transparent pixel of each image and compare those instead. The problem with this one might be that, for instance, the character's hand could be above a tile (so it would be in a transparent zone of the tile) but a pixel that is not the rightmost could touch part of the tile without being detected. Another problem would be that in different frames, the rightmost, leftmost, etc. pixels might not be at the same position. Should I not bother with that and just check the collisions on the rectangles? It would be simpler, but I'm afraid people.will feel that there are collisions sometimes that shouldn't happen.

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  • Alpha blend 3D png texture in XNA

    - by ProgrammerAtWork
    I'm trying to draw a partly transparent texture a plane, but the problem is that it's incorrectly displaying what is behind that texture. Pseudo code: vertices1 basiceffect1 // The vertices of vertices1 are located BEHIND vertices2 vertices2 basiceffect2 // The vertices of vertices2 are located IN FRONT vertices1 GraphicsDevice.Clear(Blue); PrimitiveBatch.Begin(); //if I draw like this: PrimitiveBatch.Draw(vertices1, trianglestrip, basiceffect1) PrimitiveBatch.Draw(vertices2, trianglestrip, basiceffect2) //Everything gets draw correctly, I can see the texture of vertices2 trough //the transparent parts of vertices1 //but if I draw like this: PrimitiveBatch.Draw(vertices2, trianglestrip, basiceffect2) PrimitiveBatch.Draw(vertices1, trianglestrip, basiceffect1) //I cannot see the texture of vertices1 in behind the texture of vertices2 //Instead, the texture vertices2 gets drawn, and the transparent parts are blue //The clear color PrimitiveBatch.Draw(vertice PrimitiveBatch.End(); My question is, Why does the order in which I call draw matter?

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  • OpenGL ES Basic Fragment Shader help with transparency

    - by Chris
    I have just spent my first half hour playing with the shader language. I have modified the basic program I have which renders the texture, to allow me to colour the texture. varying vec2 texCoord; uniform sampler2D texSampler; /* Given the texture coordinates, our pixel shader grabs the corresponding * color from the texture. */ void main() { //gl_FragColor = texture2D(texSampler, texCoord); gl_FragColor = vec4(0,1,0,1)*vec4(texture2D(texSampler,texCoord).xyz,1); } I have noticed how this affects my transparent textures, and I believe I am loosing the alpha channel which would explain why previously transparent area's appear totally black. If I use the following line instead, I am shown the transparent area's gl_FragColor = vec4(0,1,0,1)*vec4(texture2D(texSampler,texCoord).aaa,1); How can I retain the transparency after this modification to the colour? I have seen various things about a .w property, and also luminous, but my tweaks with those and the .aaa property are not working XD

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  • 2D metaball liquid effect - how to feed output of one rendering pass as input to another shader

    - by Guye Incognito
    I'm attempting to make a shader for unity3d web project. I want to implement something like in the great answer by DMGregory in this question. in order to achieve a final look something like this.. Its metaballs with specular and shading. The steps to make this shader are. 1. Convert the feathered blobs into a heightmap. 2. Generate a normalmap from the heightmap 3. Feed the normal map and height map into a standard unity shader, for instance transparent parallax specular. I pretty much have all the pieces I need assembled but I am new to shaders and need help putting them together I can generate a heightmap from the blobs using some fragment shader code I wrote (I'm just using the red channel here cus i dont know if you can access the brightness) half4 frag (v2f i) : COLOR{ half4 texcol,finalColor; texcol = tex2D (_MainTex, i.uv); finalColor=_MyColor; if(texcol.r<_botmcut) { finalColor.r= 0; } else if((texcol.r>_topcut)) { finalColor.r= 0; } else { float r = _topcut-_botmcut; float xpos = _topcut - texcol.r; finalColor.r= (_botmcut + sqrt((xpos*xpos)-(r*r)))/_constant; } return finalColor; } turns these blobs.. into this heightmap Also I've found some CG code that generates a normal map from a height map. The bit of code that makes the normal map from finite differences is here void surf (Input IN, inout SurfaceOutput o) { o.Albedo = fixed3(0.5); float3 normal = UnpackNormal(tex2D(_BumpMap, IN.uv_MainTex)); float me = tex2D(_HeightMap,IN.uv_MainTex).x; float n = tex2D(_HeightMap,float2(IN.uv_MainTex.x,IN.uv_MainTex.y+1.0/_HeightmapDimY)).x; float s = tex2D(_HeightMap,float2(IN.uv_MainTex.x,IN.uv_MainTex.y-1.0/_HeightmapDimY)).x; float e = tex2D(_HeightMap,float2(IN.uv_MainTex.x-1.0/_HeightmapDimX,IN.uv_MainTex.y)).x; float w = tex2D(_HeightMap,float2(IN.uv_MainTex.x+1.0/_HeightmapDimX,IN.uv_MainTex.y)).x; float3 norm = normal; float3 temp = norm; //a temporary vector that is not parallel to norm if(norm.x==1) temp.y+=0.5; else temp.x+=0.5; //form a basis with norm being one of the axes: float3 perp1 = normalize(cross(norm,temp)); float3 perp2 = normalize(cross(norm,perp1)); //use the basis to move the normal in its own space by the offset float3 normalOffset = -_HeightmapStrength * ( ( (n-me) - (s-me) ) * perp1 + ( ( e - me ) - ( w - me ) ) * perp2 ); norm += normalOffset; norm = normalize(norm); o.Normal = norm; } Also here is the built-in transparent parallax specular shader for unity. Shader "Transparent/Parallax Specular" { Properties { _Color ("Main Color", Color) = (1,1,1,1) _SpecColor ("Specular Color", Color) = (0.5, 0.5, 0.5, 0) _Shininess ("Shininess", Range (0.01, 1)) = 0.078125 _Parallax ("Height", Range (0.005, 0.08)) = 0.02 _MainTex ("Base (RGB) TransGloss (A)", 2D) = "white" {} _BumpMap ("Normalmap", 2D) = "bump" {} _ParallaxMap ("Heightmap (A)", 2D) = "black" {} } SubShader { Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"} LOD 600 CGPROGRAM #pragma surface surf BlinnPhong alpha #pragma exclude_renderers flash sampler2D _MainTex; sampler2D _BumpMap; sampler2D _ParallaxMap; fixed4 _Color; half _Shininess; float _Parallax; struct Input { float2 uv_MainTex; float2 uv_BumpMap; float3 viewDir; }; void surf (Input IN, inout SurfaceOutput o) { half h = tex2D (_ParallaxMap, IN.uv_BumpMap).w; float2 offset = ParallaxOffset (h, _Parallax, IN.viewDir); IN.uv_MainTex += offset; IN.uv_BumpMap += offset; fixed4 tex = tex2D(_MainTex, IN.uv_MainTex); o.Albedo = tex.rgb * _Color.rgb; o.Gloss = tex.a; o.Alpha = tex.a * _Color.a; o.Specular = _Shininess; o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap)); } ENDCG } FallBack "Transparent/Bumped Specular" }

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