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• HTML5 article tag application for the iPad/iPhone

  - by dspencer

  I've used article tags on websites. My understanding and practice is to use the article tag for publication content. I always use HTML/HTML5 tags as their intended purposes and not at will. Recently, I've seen an HTML template that uses the article tag for the non-publication page content such as the content of an About Us page or any other generic page. I asked the why it was used this way and the (vague) explanation was that it had to do with the way the iPad read the tag. Is this true?

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• Career growth in Adobe Flex or HTML5? [closed]

  - by Raj

  I have been working as a java/j2ee developer in a mnc from past 2 years. I have worked on javascript,jsp,struts,html,css on the 1st project. Now I am working on javascript/xsl/Adobe Flex in current project for 6 months. I am getting calls for java/flex developer from jobsites. Recently got a call for a Javascript/HTML5 developer. Is it a good option compared to Adobe Flex in current project? Please guide me among these technologies which will take my career in right direction and good growth which keeps in demand.

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• Manually updating HTML5 local storage?

  - by hustlerinc

  I'm just starting out HTML5 game developement (and game dev in general) and watching all the videos and tutorials available something has crossed my mind. Everyone keep saying I should set the cookie's (or cached files) to be expired after a certain amount of time. So that when it reaches that time the browser automatically downloads all assets again, even if it's the same asset's. Wouldn't it be possible to manually define the version of the game? For example the user has downloaded all the files for 1.01 of the game, when updating I change a simple variable to 1.02. When the user logs in it would compare his version to the current and if they are not equal only then it downloads the files? This could even be improved to download only specific files depending on what needs to be updated? Would this be possible or am I just dreaming? What are the possible downsides of this approach?

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• HTML5 - check if font has loaded

  - by espais

  At present I load my font for my game in with @font-face For instance: @font-face { font-family: 'Orbitron'; src: url('res/orbitron-medium.ttf'); } and then reference it throughout my JS implementation as such: ctx.font = "12pt Orbitron"; where ctx is my 2d context from the canvas. However, I notice a certain lag time while the font is downloaded to the user. Is there a way I can use a default font until it is loaded in? Edit - I'll expand the question, because I hadn't taken the first comment into account. What would the proper method of handling this be in the case that a user has disabled custom fonts?

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• Adding multiplayer to an HTML5 game

  - by espais

  I am interested in making a game that I currently have a co-op experience, however I'm curious as to the best method of implementing this in HTML5. I have made games before using straight C sockets, and also with the Net library for SDL. What are some of my best options for doing this in a canvas-based environment? At present, all I can come up with are either AJAX/database solutions (with a high refresh rate), or somehow implementing a PHP server that would funnel the data through sockets. The overall gameplay would be a 2.5D platformer-ish type of game, so both clients would need to be continually updated with player positions, enemy positions, projectiles, environmental data, etc.

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• HTML5 article tag application for the iPad

  - by dspencer

  I've used article tags on websites. My understanding and practice is to use the article tag for publication content. I always use HTML/HTML5 tags as their intended purposes and not at will. Recently, I've seen an HTML template that uses the article tag for the non-publication page content such as the content of an About Us page or any other generic page. I asked the why it was used this way and the (vague) explanation was that it had to do with the way the iPad read the tag. Is this true?

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• HTML5 / Native / C# & Mono [closed]

  - by iainjames88

  My apologies for the subjective nature of this question but I'm unsure as to which path to follow. I would like to do a bit of indie game development for the iPhone (nothing serious, just something I've wanted to pursue). At my university we aren't taught Java or Objective-C but C#/.NET and HTML5/JavaScript. Is it worth taking what I already know and try to accomplish my goal using, for example, C# and Mono or should I invest the time and learn Objective-C? I don't have a problem learning something new alongside my course (I love learning new stuff) and time isn't a factor. I'm slightly in favor of learning Objective-C for as it would be another string to my bow in the workplace, but it would be nice to stay with C# because it is what I'm used to.

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• HTML5, PHP, JAVA or asp?

  - by user67418

  I am building a new website for a friend of mine. Its all plain html, and a server side include. The problem is to build static pages for 500 products would not be fun to create, or maintain. So i am forced to at least put dynamic information on these pages based off a spreadsheet, or dynamic pages all together. What i want to do is have a spreadsheet that can be used to keep track of in stock quantity, sku numbers, ecc.. that way i dont have to update hundreds of pages every night. He can just edit the spreadsheet and the pages will automatically adjust. I am a busy man, and i am not asking anyone to just give me the answer. But to save some time what is more worth learning to get this done fastest. HTML5, PHP, JAVA asp, or is there somehthing else better suited?

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• HTML5 Development for Dummies

  - by Geertjan

  What's HTML5 all about and what does it actually mean, concretely, to develop HTML5 applications? NetBeans IDE 7.3 provides something called "Project Easel", which is a bundling of HTML5-related tools into a coherent toolset. Within a matter of hours, you'll know everything you need to know about what all this is about if you follow the steps below.  Get A Solid Overview. Start by viewing this screencast from JavaOne 2012 (click the media link on the right side once you've clicked the link below, a downloadable MP4 file is also available there):https://oracleus.activeevents.com/connect/sessionDetail.ww?SESSION_ID=4038That is an awesome way to get you in the right mindframe for what HTML5 is and how it fits into the programming world, together with a very cool and entertaining demo, presented by JB Brock. He starts with about three slides and then does a super awesome demo that puts you into the picture very quickly. Understand How HTML5 Relates To Java EE. Now here's a very cool follow up to the above, again demo-driven (click the media links on the right side once you've clicked the link below):https://oracleus.activeevents.com/connect/sessionDetail.ww?SESSION_ID=4737David Konecny takes the Affable Bean project created via the NetBeans E-commerce Tutorial and creates an HTML5 front end for it! I.e., you are shown how HTML5 can provide a different front end, as an alternative to JSF. Why would you do that? Well, that's explained in David's session, as well as in JB Brock's session, i.e., choose the right technology for the right situation. Sometimes HTML5 might make sense, other times JSF might make sense. Follow The NetBeans Screencasts. To revise and firm up everything you've learned from the above two JavaOne sessions, watch two screencasts by Ken Ganfield, part 1, Getting Started with HTML5 and part 2, Working with JavaScript in HTML5 Applications. In particular, you'll learn how NetBeans IDE provides tools to thoroughly cover the needs of HTML5 developers. Having taken the above three steps, you now have a thorough background, together with an understanding of the tools and procedures needed for creating your own HTML5 applications.

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• When using ItemsControl ItemsControl.ItemsPanel is set to Canvas, ContenPresenter comes in and break

  - by code-zoop

  I am using an ItemsControl where the ItemsPanel is set to Canvas (see this question for more background information). The ItemsControl is performing as I want, and it works like a charm when adding a child element manually by putting it into ItemsControl.Items: <ItemsControl> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Canvas IsItemsHost="True" /> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.Items> <Button Canvas.Left="500" Content="Button Text" /> </ItemsControl.Items> </ItemsControl> Note the Canvas.Left property on the Button. This works like a charm, and the Button is placed 500 pixels from the left of the ItemsControl left side. Great! However, When I am defining a ItemsSource binding to a List, the Canvas.left doesn't have any effect: <ItemsControl ItemsSource="{Binding Elements}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Canvas IsItemsHost="True" /> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <Button Canvas.Left="500" Content="Button Text" /> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> By inspecting the application during run time, I see one difference. The container ContentPresenter has been added between the Canvas and the button.. How can I set the Canvas.Left property on the ContentPresenter itself? Or is there another way to solve this problem? Thanks to all!

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• HTML5 offline video caching in mobile safari

  - by jj

  Sorry if this gets posted twice, but Safari crashed while posting the first version, and I don't see it in my profile. Anyway I can't seem to get Safari on the iPhone or iPad to offline cache videos. Everything else gets cached just fine when I go offline. The video file is obviously in the manifest, but I just get the broken arrow. Works fine in Safari desktop. Any clues? I've tried both object embed and the video tags.

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• HTML5 Semantics - H1 or H2 for ARTICLE titles in a SECTION

  - by Matt

  It's my understanding (based from this chapter of Dive into HTML5: http://goo.gl/9zliD) that it can be considered semantically appropriate to use H1 tags in multiple areas of the page, as a method of setting the most important title for that particular content. If I'm using this methodology, and I have a SECTION which I've assigned an H1 of 'Articles', should I use H1 or H2 to define the titles for ARTICLEs in that SECTION? This is a bit confusing to me as the article titles are the most important heading for their ARTICLE, but are also 'children' of the SECTION's title. Example code: <section class="article-list"> <header> <h1>Articles</h1> </header> <article> <header> <h2>Article Title</h2> <time datetime="201-02-01">Today</time> </header> <p>Article text...</p> </article> <article> <header> <h2>Article Title</h2> <time datetime="2011-01-31">Yesterday</time> </header> <p>Article text...</p> </article> <article> <header> <h2>Article Title</h2> <time datetime="2011-01-30">The Day Before Yesterday</time> </header> <p>Article text...</p> </article> </section>

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• HTML5 game engine for a 2D or 2.5D RPG style "map walk"

  - by stargazer

  please help me to choose a HTML5 game engine or Javascript libraries I want to do the following in the game: when the game starts a part the huge map (full size of the map: about 7 screens) is shown. The map itself is completely designed in the editor mapeditor.org (or in some comparable editor - if you know a good alternative to mapeditor.org - let me know) and loaded at runtime or at design time. The game engine should support loading of isometric maps (well, in worst case only orthogonal maps will be sufficient) both "tile layer" and "object layer" from mapeditor.org should be supported. Scrolling/performance of this map should be fast enough. The map and the game should be either in 2D (orthogonal map) or in 2.5D (isometric map) The game engine should support movement of sprites with animation. Let say I have a sprite for "human" with animation sequences showing "walking" in 8 directions - it should be imported into game engine and should "walk" on the map without writing a lot of Javascript code. Automatic scrolling of the map the "human" nears the screen border. Collision detection, "solid" objects. The mapeditor.org supports properies on tiles. Let say I assign a "solid" property to some tiles in editor. It should be easy to check this "solid" property in the game engine and implement kind of "solid" behavior, so the animanted sprites do not walk through the walls. Collision detection - it should be easy to implement some custom functionality like "when sprite A is close to sprite B - call this function" Showing "dialogs" or popup windows on top of the map - should be easy to implement. Cross-browser audio support - (it is implemented quite well in construct 2 from scirra, so I'm looking for the comparable audio quality) The game itself is a king of RPG but without fighting scenes and without huge "inventory". The main character just walking on the map, discovers some things, there are dialogs and sounds. The functionality of this example from sprite.js http://batiste.dosimple.ch/sprite.js/tests/mapeditor/map_reader.html is very close to what I'm developing. But I'm not a Javascript guru (and a very lazy guy) and would like to write even less Javascript code as in the example...

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• 3d cube using canvas. Need a little improvement

  - by TimeManx

  I made this 3d cube using the following code Matrix mMatrix = canvas.getMatrix(); canvas.save(); camera.save(); camera.rotateY(-angle); camera.getMatrix(mMatrix); mMatrix.preTranslate(-width, 0); mMatrix.postTranslate(width, 0); canvas.concat(mMatrix); canvas.drawBitmap(bmp1, 0, 0, null); camera.restore(); canvas.restore(); camera.rotateY(90 - angle); camera.getMatrix(mMatrix); mMatrix.preTranslate(-width, 0); mMatrix.postTranslate(width2, 0); canvas.concat(mMatrix); canvas.drawBitmap(bmp2, width, 0, null); This is what it gives But what I need is It's because when Camera rotates the images, some part of the image gets hidden. Like this But I think this can be done.

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• efficient collision detection - tile based html5/javascript game

  - by Tom Burman

  Im building a basic rpg game and onto collisions/pickups etc now. Its tile based and im using html5 and javascript. i use a 2d array to create my tilemap. Im currently using a switch statement for whatever key has been pressed to move the player, inside the switch statement. I have if statements to stop the player going off the edge of the map and viewport and also if they player is about to land on a tile with tileID 3 then the player stops. Here is the statement: canvas.addEventListener('keydown', function(e) { console.log(e); var key = null; switch (e.which) { case 37: // Left if (playerX > 0) { playerX--; } if(board[playerX][playerY] == 3){ playerX++; } break; case 38: // Up if (playerY > 0) playerY--; if(board[playerX][playerY] == 3){ playerY++; } break; case 39: // Right if (playerX < worldWidth) { playerX++; } if(board[playerX][playerY] == 3){ playerX--; } break; case 40: // Down if (playerY < worldHeight) playerY++; if(board[playerX][playerY] == 3){ playerY--; } break; } viewX = playerX - Math.floor(0.5 * viewWidth); if (viewX < 0) viewX = 0; if (viewX+viewWidth > worldWidth) viewX = worldWidth - viewWidth; viewY = playerY - Math.floor(0.5 * viewHeight); if (viewY < 0) viewY = 0; if (viewY+viewHeight > worldHeight) viewY = worldHeight - viewHeight; }, false); My question is, is there a more efficient way of handling collisions, then loads of if statements for each key? The reason i ask is because i plan on having many items that the player will need to be able to pickup or not walk through like walls cliffs etc. Thanks for your time and help Tom

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• Safari won't request video or audio from HTML 5 media elements?

  - by thure

  So far what I've been developing has worked in Chrome and, using fallbacks, IE8. What I don't get is this: Safari just won't start loading <video> or <audio> content. Safari 6 won't load, and neither will iOS 5's Safari: My code calls .load() on the elements at the appropriate time (at least for Chrome), so what gives? Here is the video declaration: <video width="800" height="600" class="faces" id="facesVideo"> <source src="video/grid.mp4" type="video/mp4" /> <source src="video/grid.ogv" type="video/ogg" /> </video> The audio is declared dynamically, but has the same problem. Do I need to wait for some DOM event that Chrome doesn't need before calling .load()? What does it take to get Safari to start buffering until the elements can fire canplaythrough?

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• Zoom in on a point (using scale and translate)

  - by csiz

  I want to be able to zoom in on the point under the mouse in canvas with the mouse whell, like when zooming on maps.google. I'd like straight code as I've been working on this for 5h+ Something to start with: <canvas id="canvas" width="800" height="600"></canvas> <script type="text/javascript"> var canvas = document.getElementById("canvas"); var context = canvas.getContext("2d"); var scale = 1; var originx = 0; var originy = 0; function draw(){ context.fillStyle = "white"; context.fillRect(originx,originy,800/scale,600/scale); context.fillStyle = "black"; context.fillRect(50,50,100,100); } setInterval(draw,100); canvas.onmousewheel = function (event){ var mousex = event.clientX - canvas.offsetLeft; var mousey = event.clientY - canvas.offsetTop; var wheel = event.wheelDelta/120;//n or -n var zoom = 1 + wheel/2; scale *= zoom; originx += 0;//??? originy += 0;//??? context.scale(zoom,zoom); context.translate(0,0);//??? } </script>

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• WPF Constrain the resize of a canvas' child object to the dimensions of the canvas

  - by Scott

  Given the following XAML: <Window x:Class="AdornerTesting.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="500" Width="500" Loaded="Window_Loaded"> <Grid Name="grid"> <Canvas Name="canvas" Width="400" Height="400" Background="LightGoldenrodYellow"> <RichTextBox Name="richTextBox" Canvas.Top="10" Canvas.Left="10" BorderBrush="Black" BorderThickness="2" Width="200" Height="200" MaxWidth="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Canvas}},Path=ActualWidth}" MaxHeight="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Canvas}},Path=ActualHeight}"/> </Canvas> </Grid> </Window> and a set of adorners being added to the RichTextBox in the Loaded event like so: AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(richTextBox); adornerLayer.Add(new ResizeAdorner(richTextBox)); How do I keep from being able to resize the RichTextBox beyond the visble bounds of the Canvas? The ResizeAdorner is essentially the same code that can be found in the MSDN adorner example and it works just fine. Should I be doing something with the bindings of MaxWidth and MaxHeight in the code-behind to calculate how the RichTextBox can be resized? Or is there a way to do this in XAML?

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• Which browsers on pc have supported html5 so far?

  - by libnet

  I know that most browsers already support html5 on handphones, what's the status with pc browsers, especially for html5 video?

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• Jump handling and gravity

  - by sprawl

  I'm new to game development and am looking for some help on improving my jump handling for a simple side scrolling game I've made. I would like to make the jump last longer if the key is held down for the full length of the jump, otherwise if the key is tapped, make the jump not as long. Currently, how I'm handling the jumping is the following: Player.prototype.jump = function () { // Player pressed jump key if (this.isJumping === true) { // Set sprite to jump state this.settings.slice = 250; if (this.isFalling === true) { // Player let go of jump key, increase rate of fall this.settings.y -= this.velocity; this.velocity -= this.settings.gravity * 2; } else { // Player is holding down jump key this.settings.y -= this.velocity; this.velocity -= this.settings.gravity; } } if (this.settings.y >= 240) { // Player is on the ground this.isJumping = false; this.isFalling = false; this.velocity = this.settings.maxVelocity; this.settings.y = 240; } } I'm setting isJumping on keydown and isFalling on keyup. While it works okay for simple use, I'm looking for a better way handle jumping and gravity. It's a bit buggy if the gravity is increased (which is why I had to put the last y setting in the last if condition in there) on keyup, so I'd like to know a better way to do it. Where are some resources I could look at that would help me better understand how to handle jumping and gravity? What's a better approach to handling this? Like I said, I'm new to game development so I could be doing it completely wrong. Any help would be appreciated.

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• How to scroll hex tiles?

  - by Chris Evans

  I don't seem to be able to find an answer to this one. I have a map of hex tiles. I wish to implement scrolling. Code at present: drawTilemap = function() { actualX = Math.floor(viewportX / hexWidth); actualY = Math.floor(viewportY / hexHeight); offsetX = -(viewportX - (actualX * hexWidth)); offsetY = -(viewportY - (actualY * hexHeight)); for(i = 0; i < (10); i++) { for(j = 0; j < 10; j++) { if(i % 2 == 0) { x = (hexOffsetX * i) + offsetX; y = j * sourceHeight; } else { x = (hexOffsetX * i) + offsetX; y = hexOffsetY + (j * sourceHeight); } var tileselected = mapone[actualX + i][j]; drawTile(x, y, tileselected); } } } The code I've written so far only handles X movement. It doesn't yet work the way it should do. If you look at my example on jsfiddle.net below you will see that when moving to the right, when you get to the next hex tile along, there is a problem with the X position and calculations that have taken place. It seems it is a simple bit of maths that is missing. Unfortunately I've been unable to find an example that includes scrolling yet. http://jsfiddle.net/hd87E/1/ Make sure there is no horizontal scroll bar then trying moving right using the - right arrow on the keyboard. You will see the problem as you reach the end of the first tile. Apologies for the horrid code, I'm learning! Cheers

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• How should I sort images in an isometric game so that they appear in the correct order?

  - by Andrew

  Hi! This seems like a rather simple problem but I am having a lot of difficulty with it. What should I do to properly sort images in an isometric game? In a normal 2d top-down game one could use the screen y axis to sort the images. In this example the trees are properly sorted but the isometric walls are not. Example image: sorted by screen y Wall2 is one pixel below wall1 therefore it is drawn after wall1. If I sort by the isometric y axis the walls appear in the correct order but the trees do not. Example image: sorted by isometric y

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• How should I sort images in an isometric game so that they appear in the correct order?

  - by Andrew

  This seems like a rather simple problem but I am having a lot of difficulty with it. What should I do to properly sort images in an isometric game? In a normal 2d top-down game one could use the screen y axis to sort the images. In this example the trees are properly sorted but the isometric walls are not. Example image: sorted by screen y Wall2 is one pixel below wall1 therefore it is drawn after wall1. If I sort by the isometric y axis the walls appear in the correct order but the trees do not. Example image: sorted by isometric y

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• how embed a video on EaselJS [on hold]

  - by user3697195

  i try to make a videoplayer with EaselJS and the console dont says about it this is my HTML http://pastebin.com/djY4cpyX this is my Javascript function init() { var stage = new createjs.Stage('gameCanvas');; video = document.createElement('video'); video.setAttribute('webkit-playsinline'); video.src = 'js/bitmap/trailer.mp4'; var Video = new createjs.Bitmap(video); stage.addChild(Video); createjs.Ticker.addEventListener(stage); createjs.Ticker.setFPS(24); stage.update(); }

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• Free movement in a tile-based isometric game

  - by xtr486

  Is there a reasonable easy way to implement free movement in a tile-based isometric game? Meaning that the player wouldn't just instantly jump from one tile to another or not be "snapped" to the grid (for example, if the movement between tiles were animated but you'd be locked from doing anything before the animation finishes). I'm a really beginner with anything related to game programming, but with the help of this site and some other resources it was quite easy to do the basic stuff, but I haven't been able to find any useful resources for this particular problem. Currently I've improvised something close to this: http://jsfiddle.net/KwW5b/4/ (WASD movement). The idea for the movement was to use the mouse map to detect when the player has moved to a different tile and then flip the offsets, and for the most part it works correctly (each corner makes the player move to wrong location: see http://www.youtube.com/watch?v=0xr15IaOhrI, which is probably because I couldn't get the full mouse map work properly), but I have no illusions that it is even close to a good/sane solution. And anyway, it's mostly just to demonstrate what kind of a thing I'd like to implement.

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