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• Free Markdown JS viewer

  - by maaartinus

  I'd like to use Markdown for documents to be exchanged with a colleague of mine. The ideal workflow would be IMHO editing the source in any plaintext editor while simultaneously viewing it in a browser. The client viewer should be able to redraw the text after each save automatically, and ideally even always switch to the most recent source file (so I don't need to navigate there manually). It'd be nice if I could (was allowed) modify the viewer a bit, things like using trailing spaces for line breaks are really terrible (I don't see them, my editor strips them, git complains about them, etc.). I'm interested in a software capable of this and easy to modify, and also in your opinions on the described workflow.

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• Ubuntu 9.10 Karmic, nVidea Quadro NVS 280 PCi, Eizo S1921 Dual Screen (Twin View) Slow Window Draws

  - by Spasm

  I have been following this Tutorial to get dual monitors working on my box http://www.dwasifar.com/?p=862&cpage=1#comment-5727 It works! However, when ever I move a window, the redraw of that window takes 3-8 seconds. Even moving the window takes the same amount of time Is this being done in software rather than the nVidea hardware? The windows themselves do not respond. I have seen a few old threads but no relevant fixes - If anyone could suggest a fix I would very much appreciate it. I have tried: sudo nvidea-xconfig sudo nvidia-settings Then configure TwinView go to save the config... and the error unable to parse xorg.conf file and the error in the console VALIDATION ERROR: Data incomplete in file /etc/X11/xorg.conf. Undefined Device "null" referenced by Screen "Configured Screen Device" Segmentation fault

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• Jump and run HTML5 Game Framework

  - by user1818924

  We're developing a jump and run game with HTML5 and JavaScript and have to build an own game framework for this. Here we have some difficulties and would like to ask you for some advice: we have a "Stage" object, which represents the root of our game and is a global div-wrapper. The stage can contain multiple "Scenes", which are also div-elements. We would implement a Scene for the playing task, for pause, etc. and switch between them. Each scene can therefore contain multiple "Layers", representing a canvas. These Layer contain "ObjectEntities", which represent images or other shapes like rectangles, etc. Each Objectentity has its own temporaryCanvas, to be able to draw images for one entity, whereas another contains a rectangle. We set an activeScene in our Stage, so when the game is played, just the active scene is drawn. Calling activeScene.draw(), calls all sublayers to draw, which draw their entities (calling drawImage(entity.canvas)). But is this some kind of good practive? Having multiple canvas to draw? Each gameloop every layer-context is cleared and drawn again. E.g. we just have a still Background-Layer, … wouldn't it be more useful to draw this once and not to clear it everytime and redraw it? Or should we use a global canvas for example in the Stage and just use this canvas to draw? But we thought this would be to expensive... Other question: Do you have any advice how we could dive into implementing an own framework? Most stuff we find online relies on existing frameworks or they just implement their game without building a framework.

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• Flash AS3 sidescrolling tiles optimization

  - by Galvanize

  I'm trying to make a sidescrolling game in Flash that will run on a low performance laptop. While studying the subject from Tonypa I saw that he builds a Bitmap by making copys of the BitmapData of each tile from the Tile Sheet and placing it on the bigger Bitmat with the size of the screen. But when I came to think on how to scroll my map I ran into some optimization doubts. I came up with two choices: Create a MovieClip, place a Bitmap instance for each tile that is shown on the screen + 1 row in it, then move them all. Then when the tile ran off the screen I would move it to end of the MovieClip and replace their BitmapData for the next row in my map. Use a Bitmap with copys of each tile in it (as shown in Tonypa's tutorial) but 1 extra row, move the whole Bitmap, and when it comes the time to replace rows, redraw the whole Bitmap and move it back to the origin position. The first idea is how a co-worker of mine suggested, the second one is my own, but none of us has enough technical knowledge to be sure on a technique that would be optimal in performance, can anyone help?

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• Flex 4: Traversing the Stage More Easily

  - by Steve

  The following is a MXML Module I am producing in Flex 4: <?xml version="1.0" encoding="utf-8"?> <mx:Module xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="init()" layout="absolute" width="100%" height="100%"> <fx:Declarations> <!-- Place non-visual elements (e.g., services, value objects) here --> </fx:Declarations> <fx:Style source="BMChartModule.css" /> <s:Panel id="panel" title="Benchmark Results" height="100%" width="100%" dropShadowVisible="false"> <mx:TabNavigator id="tn" height="100%" width="100%" /> </s:Panel> <fx:Script> <![CDATA[ import flash.events.Event; import mx.charts.ColumnChart; import mx.charts.effects.SeriesInterpolate; import mx.controls.Alert; import spark.components.BorderContainer; import spark.components.Button; import spark.components.Label; import spark.components.NavigatorContent; import spark.components.RadioButton; import spark.components.TextInput; import spark.layouts.*; private var xml:XML; private function init():void { var seriesInterpolate:SeriesInterpolate = new SeriesInterpolate(); seriesInterpolate.duration = 1000; xml = parentApplication.model.xml; var sectorList:XMLList = xml.SECTOR; for each(var i:XML in sectorList) { var ncLayout:HorizontalLayout = new HorizontalLayout(); var nc:NavigatorContent = new NavigatorContent(); nc.label = i.@NAME; nc.name = "NC_" + nc.label; nc.layout = ncLayout; tn.addElement(nc); var cC:ColumnChart = new ColumnChart(); cC.percentWidth = 70; cC.name = "CC"; nc.addElement(cC); var bClayout:VerticalLayout = new VerticalLayout(); var bC:BorderContainer = new BorderContainer(); bC.percentWidth = 30; bC.layout = bClayout; nc.addElement(bC); var bClabel:Label = new Label(); bClabel.percentWidth = 100; bClabel.text = "Select a graph to view it in the column chart:"; var dpList:XMLList = sectorList.(@NAME == i.@NAME).DATAPOINT; for each(var j:XML in dpList) { var rB:RadioButton = new RadioButton(); rB.groupName = "dp"; rB.label = j.@NAME; rB.addEventListener(MouseEvent.CLICK, rBclick); bC.addElement(rB); } } } private function rBclick(e:MouseEvent):void { var selectedTab:NavigatorContent = this.tn.selectedChild as NavigatorContent; var colChart:ColumnChart = selectedTab.getChildByName("CC") as ColumnChart; trace(selectedTab.getChildAt(0)); } ]]> </fx:Script> </mx:Module> I'm writing this function rBclick to redraw the column chart when a radio button is clicked. In order to do this I need to find the column chart on the stage using actionscript. I've currently got 3 lines of code in here to do this: var selectedTab:NavigatorContent = this.tn.selectedChild as NavigatorContent; var colChart:ColumnChart = selectedTab.getChildByName("CC") as ColumnChart; trace(selectedTab.getChildAt(0)); Getting to the active tab in the tabnavigator is easy enough, but then selectedTab.getChildAt(0) - which I was expecting to be the chart - is a "spark.skin.spark.SkinnableContainerSkin"...anyway, I can continue to traverse the tree using this somewhat annoying code, but I'm hoping there is an easier way. So in short, at run time I want to, with as little code as possible, identify the column chart in the active tab so I can redraw it. Any advice would be greatly appreciated.

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• Meaning of offset in pygame Mask.overlap methods

  - by Alan

  I have a situation in which two rectangles collide, and I have to detect how much did they collide so so I can redraw the objects in a way that they are only touching each others edges. It's a situation in which a moving ball should hit a completely unmovable wall and instantly stop moving. Since the ball sometimes moves multiple pixels per screen refresh, it it possible that it enters the wall with more that half its surface when the collision is detected, in which case i want to shift it position back to the point where it only touches the edges of the wall. Here is the conceptual image it: I decided to implement this with masks, and thought that i could supply the masks of both objects (wall and ball) and get the surface (as a square) of their intersection. However, there is also the offset parameter which i don't understand. Here are the docs for the method: Mask.overlap Returns the point of intersection if the masks overlap with the given offset - or None if it does not overlap. Mask.overlap(othermask, offset) -> x,y The overlap tests uses the following offsets (which may be negative): +----+----------.. |A | yoffset | +-+----------.. +--|B |xoffset | | : :

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• Screen problems on 11.10 using VGA compatible controller 2nd Generation Core Processor Family Integrated Graphics Controller

  - by MorrisseyJ

  I am having problems with my display. The problem manifests as lots of screen artefacts, which seem to be worse in Unity than in Gnome 3, are worse after i have used suspend and are intolerable if i set myself up on a dual monitor. Specific issues include: icons disappearing, lines occurring all over the screen, the backgrounds of certain windows going another colour and window borders disappearing or being filled with text from other parts of the screen. The most annoying problem is lines of text disappearing from a host of word processing programmes (libreoffice, gedit, bluefish etc), as i type. In most circumstances the screen problem can be temporarily fixed (so that i can see the screen clearly) by either scrolling the text off the screen and then scrolling it back onto the screen, or highlighting the offending area of the desktop, by clicking and dragging. Errors on parts of the screen that don't seem to redraw (window borders (off the universal menu) or the screen area outside of a LO document, in print layout view, for example) can't seem to be fixed in a session. I am running 11.10, 64 bit on my Thinkpad x121e Display information is: description: VGA compatible controller product: 2nd Generation Core Processor Family Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:42 memory:d0000000-d03fffff memory:c0000000-cfffffff ioport:4000(size=64) There appear to be a few problems with the Intel graphics and Ubuntu but i am not sure if they are all the same. If anyone knows if this is a known bug it'd be great to know, otherwise i'll file a report. Should anyone know of a fix i would greatly appreciate hearing about it. Let me know if you need any more information. Thanks

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• nVidia Settings: Overriding anti-aliasing causes delay

  - by Kalle Elmér

  I'm using Google Sketchup on ubuntu 12.04 with Wine 1.4. It works flawlessly out of the box, but anti-aliasing is causing some problems. I can override anti-aliasing settings using the nVidia X Server Settings utility, which results in a great-looking image. However, the view doesn't seem to update properly. It's a bit hard to explain, but if I do something (e.g. zooming) the changes won't appear in the view until I take another action. in other words, there seems to be a delay of one "action". Take this example. The mouse wheel is moved one notch to zoom in one step. Nothing happens. An object is selected by clicking. The new zoom is rendered but the selection box doesn't appear. An empty area is clicked. The selection box appears. Is there something that I can do to solve the problem? Could I force the GPU to redraw that view with a certain interval, or is there some other solution? I really like anti-aliasing, but it's hard to use when drawing stuff.

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• Is using multiple canvas objects a good practice?

  - by user1818924

  We're developing a jump and run game with HTML5 and JavaScript and have to build an own game framework for this. Here we have some difficulties and would like to ask you for some advice: We have a "Stage" object, which represents the root of our game and is a global div-wrapper. The stage can contain multiple "Scenes", which are also div-elements. We would implement a Scene for the playing task, for pause, etc. and switch between them. Each scene can therefore contain multiple "Layers", representing a canvas. These Layer contain "ObjectEntities", which represent images or other shapes like rectangles, etc. Each Objectentity has its own temporaryCanvas, to be able to draw images for one entity, whereas another contains a rectangle. We set an activeScene in our Stage, so when the game is played, just the active scene is drawn. Calling activeScene.draw(), calls all sublayers to draw, which draw their entities (calling drawImage(entity.canvas)). But is this some kind of good practice? Having multiple canvas to draw? Each game loop every layer-context is cleared and drawn again. E.g. we just have a still Background-Layer, … wouldn't it be more useful to draw this once and not to clear it every time and redraw it? Or should we use a global canvas for example in the Stage and just use this canvas to draw? But we thought this would be to expensive...

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• Fixed timestep with interpolation in AS3

  - by Jim Sreven

  I'm trying to implement Glenn Fiedler's popular fixed timestep system as documented here: http://gafferongames.com/game-physics/fix-your-timestep/ In Flash. I'm fairly sure that I've got it set up correctly, along with state interpolation. The result is that if my character is supposed to move at 6 pixels per frame, 35 frames per second = 210 pixels a second, it does exactly that, even if the framerate climbs or falls. The problem is it looks awful. The movement is very stuttery and just doesn't look good. I find that the amount of time in between ENTER_FRAME events, which I'm adding on to my accumulator, averages out to 28.5ms (1000/35) just as it should, but individual frame times vary wildly, sometimes an ENTER_FRAME event will come 16ms after the last, sometimes 42ms. This means that at each graphical redraw the character graphic moves by a different amount, because a different amount of time has passed since the last draw. In theory it should look smooth, but it doesn't at all. In contrast, if I just use the ultra simple system of moving the character 6px every frame, it looks completely smooth, even with these large variances in frame times. How can this be possible? I'm using getTimer() to measure these time differences, are they even reliable?

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• When to draw/layout child controls in UserControl

  - by Ted Elliott

  I have a list-type UserControl (like a ListBox). The items inside the control are another complex UserControl containing a few other controls (ComboBox, TextBox, etc). I'm wondering what the preferred or best method would be to override to draw/layout the child controls. I basically want to trigger this method any time the list changes. I originally had a RedrawItems method that I just called whenever I needed to redraw which added or removed Controls from the Controls collection. But it was getting triggered too early in the lifecycle of the code from some of the designer code. Now I've switched to overriding OnLayout and doing my stuff there. I call PerformLayout when I want to trigger a redraw, such as when the DataSource property changes or when it fires a changed event. Is OnLayout the best place for this? Here is the code: [ComplexBindingProperties("DataSource")] public partial class CustomList : UserControl { private object _dataSource; private CustomListItem _newRow; public CustomList() { InitializeComponent(); } protected override void OnCreateControl() { base.OnCreateControl(); _newRow = new CustomListItem(); Controls.Add(_newRow); } public object DataSource { get { return _dataSource; } set { bool register = _dataSource != value; if (_dataSource != null && _dataSource != value) { UnregisterDataSource(_dataSource); } _dataSource = value; if (_dataSource != null) RegisterDataSource(_dataSource); PerformLayout(); } } public CustomListItem ItemTemplate { get { return _newRow; } } protected override void OnLayout(LayoutEventArgs e) { base.OnLayout(e); int ctrlCount = this.Controls.AsEnumerable().OfType<CustomListItem>().Count(); ctrlCount--; // subtract 1 for the add row var ds = this.DataSource as System.Collections.IList; int itemCount = ds == null? 0 : ds.Count; int maxCount = Math.Max(ctrlCount,itemCount); if (maxCount == 0) return; this.SuspendLayout(); // temporarily remove the template Controls.RemoveAt(Controls.Count-1); for (int i = 0; i < maxCount; i++) { CustomListItem item; if (i >= itemCount) { Controls.RemoveAt(i); } else { if (i >= ctrlCount) { item = ItemTemplate.Copy(); this.Controls.Add(item); item.Location = new Point(0, item.Height * i); item.TabIndex = i + 1; item.ViewMode = true; } else { item = (CustomListItem) Controls[i]; } item.Data = ds[i]; } } this.Controls.Add(ItemTemplate); ItemTemplate.Location = new Point(0, ItemTemplate.Height * maxCount); ItemTemplate.TabIndex = maxCount + 1; this.ResumeLayout(true); } private void RegisterDataSource(object dataSource) { IBindingList ds = dataSource as IBindingList; if (ds != null) { ds.ListChanged += new ListChangedEventHandler(DataSource_ListChanged); } } void DataSource_ListChanged(object sender, ListChangedEventArgs e) { switch (e.ListChangedType) { case ListChangedType.ItemAdded: PerformLayout(); break; case ListChangedType.ItemChanged: break; case ListChangedType.ItemDeleted: PerformLayout(); break; case ListChangedType.ItemMoved: PerformLayout(); break; case ListChangedType.Reset: PerformLayout(); break; default: break; } } private void UnregisterDataSource(object dataSource) { IBindingList ds = dataSource as IBindingList; if (ds != null) { ds.ListChanged -= new ListChangedEventHandler(DataSource_ListChanged); } } }

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• canvas tile grid, hover effects, single tilesheet, etc

  - by user121730

  I'm currently in the process of building both the client and server side of an html5, canvas, and WebSocket game. This is what I have thus far for the client: http://jsfiddle.net/dDmTf/7/ Current obstacles The hover effect has no idea what to put back after the mouse leaves. Currently it's just drawing a "void" tile, but I can't figure out how to redraw a single tile without redrawing the whole map. How would I go about storing multiple layers within the map variable? I was considering just using a multi-dimensional array for each layer (similar to what you see as the current array), and just iterating through it, but is that really an efficient way of doing it? Side note The tile sheet being used for the jsfiddle display is only for development. I'll be replacing it as things progress in the engine. I hope you can help! Hopefully you guys can help me, I've been struggling to get through things, since I'm learning how things kind of stuff works as I go. If you guys have any pointers for my JavaScript, feel free. As I'm more or less learning advanced usage as I go, I'm sure I'm doing plenty of things wrong. Note: I will continue to update this post as the engine improves, but updating the jsfiddle link and updating the obstacles list by striking things that have been solved, or adding additions. Thanks!

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• Need a good quality bitmap rotation algorithm for Android

  - by Lumis

  I am creating a kaleidoscopic effect on an android tablet. I am using the code below to rotate a slice of an image, but as you can see in the image when rotating a bitmap 60 degrees it distorts it quite a lot (red rectangles) – it is smudging the image! I have set dither and anti-alias flags but it does not help much. I think it is just not a very sophisticated bitmap rotation algorithm. canvas.save(); canvas.rotate(angle, screenW/2, screenH/2); canvas.drawBitmap(picSlice, screenW/2, screenH/2, pOutput); canvas.restore(); So I wonder if you can help me find a better way to rotate a bitmap. It does not have to be fast, because I intend to use a high quality rotation only when I want to save the screen to the SD card - I would redraw the screen in memory before saving. Do you know any comprehensible or replicable algorithm for bitmap rotation that I could programme or use as a library? Or any other suggestion? EDIT: The answers below made me think if Android OS had bilinear or bicubic interpolation option and after some search I found that it does have its own version of it called FilterBitmap. After applying it to my paint pOutput.setFilterBitmap(true); I get much better result

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• Games without a(n explicit) game loop

  - by Davy8

  Most game development happens with a main game loop. Are there any good articles/blog posts/discussions about games without a game loop? I imagine they'd mostly be web games, but I'd be interested in hearing otherwise. (As a side note, I think it's really interesting that the concept is almost exclusively used in gaming as far as I'm aware, perhaps that may be another question.) Edit: I realize there's probably a redraw loop somewhere. I guess what I really mean is a loop that is hidden to you. Frames are something you as the developer are not concerned with as you're working on a higher level of abstraction. E.g. someLootItem.moveTo(inventory, someAnimatationType) and that will move from the loot box to your inventory using the specified animation type without the game developer having to worry about the implementation details of that animation. Maybe that's how "real" games end up working, but from reading most tutorials they seem to imply a much more granular level of control is used, but that might just be an artifact of being a tutorial.

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• DisplayObject not being displayed in AS3

  - by MarkSteve

  I have this class: public class IskwabolText extends Sprite { private var _tf:TextField; private var _tfmt:TextFormat; private var _size:Number; private var _text:String; public function IskwabolText(params:Object) { var defaultParams:Object = { color: 0x000000, background: false, backgroundColor: 0xFFFFFF, width: 0, height: 0, multiline: false, wordWrap: false }; // textfield _tf = new TextField(); _tf.antiAliasType = 'advanced'; _tf.embedFonts = true; _tf.type = 'dynamic'; _tf.selectable = false; // textformat _tfmt = new TextFormat(); set(defaultParams); set(params); } public function get(param:String):Object { switch (param) { case 'size': return _tfmt.size; case 'text': return _tf.text; case 'font': return _tfmt.font; case 'color': return _tfmt.color; case 'background': return _tf.background; case 'backgroundColor': return _tf.backgroundColor; case 'width': return _tf.width; case 'height': return _tf.height; case 'multiline': return _tf.multiline; case 'wordWrap': return _tf.multiline; default: return this[param]; } return null; } public function set(params:Object):Object { for (var i:String in params) { setParam(i, params[i]); } redraw(); return this; } private function setParam(param:String, value:Object):Object { switch (param) { case 'size': _tfmt.size = new String(value); break; case 'text': _tf.text = new String(value); break; case 'font': _tfmt.font = new String(value); break; case 'color': _tfmt.color = new uint(value); break; case 'background': _tf.background = new Boolean(value); break; case 'backgroundColor': _tf.backgroundColor = new uint(value); break; case 'width': _tf.width = new Number(value); break; case 'height': _tf.height = new Number(value); break; case 'multiline': _tf.multiline = new Boolean(value); break; case 'wordWrap': _tf.multiline = new Boolean(value); break; default: this[param] = value; break; } return this; } private function redraw():void { _tf.setTextFormat(_tfmt); if (contains(_tf)) removeChild(_tf); if (_tf.width == 0) _tf.width= _tf.textWidth+5; _tf.height = _tf.textHeight; addChild(_tf); } } But when I do this: public class Main extends Sprite { public function Main() { addChild(new IskwabolText({ size: 100, text: 'iskwabol', font: 'Default', // this is properly embedded color: 0x000000, x: stage.stageWidth / 2 - this.width / 2, y: 140 })); } } The child IskwabolText doesn't get displayed. What happening?

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• How do I prevent flickering on CListCtrl?

  - by Sorin Sbarnea

  I'm using a CListCtrl/CListView report view (LVS_REPORT) in virtual mode (LVS_OWNERDATA) with LVS_EX_DOUBLEBUFFER enabled and I encounter ugly flickering. Double buffer have a real effect but it doesn't stop all flickering (without it very slow). I'm not looking for switching to other controls that would require a high amount of rework (like ObjectListView) How does the flickering behaves: * on column resize - the background is first clean using lightgray and after this is displayed the text (background is white) * on mouse scroll (animated) - for a very short time there is lightgray-bar displayed in the area where new lines are to be displayed. It looks like it does clean the background using the default window background color (lightgray) for the area where it has to redraw. How do I solve the flickering problem?

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• QT's QGraphicsview clickable icon on screen

  - by goodwince

  I'm working on a project with QT and am trying to draw icons from a database. I have auxiliary information in the table that I would like to display if the user chooses to see it (i.e. the x,y of the icon and some other options from database). I am debating on would it be better to go through and just redraw all the icons with this information added, or do some sort of looping through the icons and setting some value to true to display the information. Thanks in advance.

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• auto-scaling size with anchors - overlapping controls

  - by Shane.C

  I'm having some trouble with resizing and scaling of controls in a windows form. I've set anchors up so that the controls stay in ratio with the form, which works great. However, perhaps i was expecting too much when i thought that the control origin points would also scale and change with the form scaling, but this is not the case and i'm finding my controls overlapping. here's some screenshots; anyone know of an approach i can take to solve this problem? perhaps i need to set control origins to dynamic drawing points that scale, but then do these redraw on scaling the form, or only on creation?

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• iPhone: Changing CGImageAlphaInfo of CGImage

  - by TechZen

  I have a PNG image that has an unsupported bitmap graphics context pixel format. Whenever I attempt to resize the image, CGBitmapContextCreate() chokes on the unsupported format (Error formatted for easy reading): CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 32 bits/pixel; 3-component colorspace; kCGImageAlphaLast; 1344 bytes/row. The list of supported pixel formats definitely does not support this combination. It appears I need to redraw the image and move the alpha channel information to kCGImageAlphaPremultipliedFirst or kCGImageAlphaPremultipliedLast. I have no idea how to go about doing this. There is nothing unusual about the PNG file and it isn't corrupted. It works in all other context just fine. I encountered this error just by chance but obviously my users might have similarly formatted files so I will have to check my app's imported images and correct for this problem.

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• Android TranslateAnimation after scrollTo() = undrawn view

  - by user293354

  This might be a "duh" question but I'm going to go ahead and ask it anyway. I have an oversized (bigger than the screen) RelativeLayout, and I'm using swipes to start a TranslateAnimation from viewing one part of the layout to another. Say for instance the layout is two screen wide and two screens tall. After the nice animation to shift the screen, I was using View.scrollTo() to set the new position. This works fine going from the first screen (top left at 0,0) to one of the others. When I swipe to animate back to the first screen though, because the View.scrollTo() invalidated that part of the layout (I assume), that part of the layout is all black as I animate through it. I tried a couple things to get it to redraw itself after the scrollTo() but haven't had any luck, so I figured I'd ask here. thanks! joe d

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• Repeated Scene Trees (Java3d / OpenGL)

  - by Jim

  Hello, I want to make a 3d scene that loops around on its self. That is to say, if you keep going in any direction, you will loop back to the other side. My current implementation is so bad, it's embarrassing to admit to it. I redraw the each change twenty-seven times, to make a 3x3x3 scene cube. When the user reaches the end of the middle cube, I jump them over to the other side. Maintaining consistency (let alone performance) is a nightmare. Total Disaster. This doesn't seem like it would be an unusual request, so I'm wondering if anyone knows of a more legit solution. Thanks!

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• My C#.NET application is running slower when the exe is located on the network

  - by leo

  Hi, My C#.NET application is running much slower when the exe is located on the network. And I'm talking about everything, even the graphical dispay is slower. For example: when a form is already loaded, if I unplug my network cable and minimize and maximize the window, it takes a very long time to redraw itself. I'm using framework .NET 3.5 SP1. Any idea on the cause? My hypothesis so far: I'm missing some options when building the app? my corporate antivirus checks more stuff because the exe is on the network the cache of Windows XP SP3 doesn't work the same way when the exe is on the network the server is a Novell server: maybe this does change something ? Thanks for your help! Leo

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• Creating an independent draw thread using pthreads (C++)

  - by sagekilla

  Hi all, I'm working on a graphical application which looks something like this: while (Simulator.simulating) { Simulator.update(); InputManager.processInput(); VideoManager.draw(); } I do this several times a second, and in the vast majority of cases my computation will be taking up 90 - 99% of my processing time. What I would like to do is take out the processInput and draw functions and have each one run independently. That way, I can have the input thread always checking for input (at a reasonable rate), and the draw thread attempting to redraw at a given frame rate. My issue is I'm not sure how I can properly do this. How would I properly initialize my pthread_t and associated pthread_attr_t so that the thread runs without blocking what I'm doing? Any help or even a link is appreciated, thanks!

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• Resetting or refreshing a database connection

  - by cdonner

  This Android application on Google uses the following method to refresh the database after replacing the database file with a backup: public void resetDbConnection() { this.cleanup(); this.db = SQLiteDatabase.openDatabase( "/data/data/com.totsp.bookworm/databases/bookworm.db", null, SQLiteDatabase.OPEN_READWRITE); } I did not build this app, and I am not sure what happens. I am trying to make this idea work in my own application, but the data appears to be cached by the views, and the app continues to show data from the database that was replaced, even after I call cleanup() and reopen the database. I have to terminate and restart the activity in order to see the new data. I tried to call invalidate on my TabHost view, which pretty much contains everything. I thought that the views would redraw and refresh their underlying data, but this did also not have the expected result. I ended up restarting the activity programmatically, which works, but this seems to be a drastic measure. Is there a better way?

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• ProgressBar not updating on change to Maximum through binding

  - by Tom

  <ProgressBar Foreground="Red" Background="Transparent" Value="{Binding NumFailed, Mode=OneWay}" Minimum="0" Maximum="{Binding NumTubes, Mode=OneWay, Converter={x:Static wpftools:DebuggingConverter.Instance}, ConverterParameter=Failedprogressbar}" FlowDirection="RightToLeft" Style="{DynamicResource {x:Static wpftools:CustomResources.StyleProgressBarVistaKey}}" /> This is what my progressbar looks like at the moment. The style came from http://mattserbinski.com/blog/look-and-feel-progressbar and the DebuggingConverter is a no-op converter that prints the value, type and parameter to the Console. I have verified that the converter for the Maximum is being called when my NumTubes property is changed. Basically, the ProgressBar won't redraw until the Value changes. So, if I have 2 tubes and 1 is failed, even if I add 20 more tubes, the bar is still half filled until the NumFailed changes, then the proportion is updated. I've tried adding spurious notifications of the NumFailed property, but that apparently doesn't work since the value didn't change. Ideas?

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