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HTML - Need A Little Help To Get Started With Canvas And Alpha Png's
My excuses for bothering you with this but I need a little push in the right direction to get started. I'm a 3d (technical) artist, but my HTML knowledge is minimal.
What I have is: - A PNG image without alpha to be used as the background. - One or more PNG's with alpha to be composited on top of this background using the embedded alpha channels. I want to do this using the Canvas element and what I learned from searching the web is they often composite everything offscreen and then draw it to the Canvas. So if anyone could provide me with small example I would be eternally grateful. It's mainly the syntax that stumps me right now. Thanks in advance. Similar TutorialsOk, so I just got Dreamweaver, how do get started in designing webpages? I heard that it makes webdesigning a lot easier. I know it's important to understand codes but at the same time I wanted to learn Dreamweaver because I know I'll be using it soon. Any help is greatly appreciated. What up Everyone! Its me the Newb!...haha OK, I need to start building the Navigation part of the website. I dont have One Dang clue how to start!... Man this web design stuff hurts my head & fustrating I have many ideas dont know how to Implement them!!!!.... It took my 3days to figure out how to do an Internal Link with a button...so yea...LoL How do I go about after clicking a Button on the homepage called "sales" then it goes to that page how do I make that a working page etc??? Do I need to add Javascript? IF so I have no idea how to integrate that into HTML still.... I wish I had a go to person...I am looking into taking some Free classes for HTML...I missed the Spring Semester sign up...D'oh!!! Ok...sorry if I confused anyone...And thanks in advance if anyone can give some pointers! First of all, I have only just started this site, and it's only ever going to be a very basic HTML site. It's going to be a ground guide for Non-League football. Here is one of the completed ground pages so far. Most of the links don't actually take you to anything in perticular, so don't shout! I'd just like a couple of ideas on how to improve the general look of the site. Thanks! Code: http://79.170.43.200/adp-design-demos.com/nlgg/wadham_lodge.html Don't worry about the ugly domain, it's only going to be like that during testing i have to draw ball on canvas in html 5 depending on the input given by user in a textbox. ex: if a user enter 5 in a textfield, 5 ball should draw on canvas. Hey guys, I'm having trouble typing in Canvas. I tried combining the jquery keyboard (http://net.tutsplus.com/tutorials/ja...ss-and-jquery/) with the canvas in order to directly type on the canvas, but I'm having trouble doing so. Does anyone have any suggestions? I really appreciate any help you can give me! Below is pasted the code I have tried so far... <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Online Keyboard</title> <link rel="stylesheet" type="text/css" href="css/style.css" /> <style> body { margin: 0px; padding: 0px; } #myCanvas { border: 1px solid #9C9898; } </style> <script> window.onload = function(){ var canvas = document.getElementById("myCanvas"); var context = canvas.getContext("2d"); var x = 50; var y = 50; context.font = "12pt Calibri"; //context.fillStyle = "orange"; // text color context.fillText($(function(){ var $write = $('#write'), shift = false, capslock = false; $('#keyboard li').click(function(){ var $this = $(this), character = $this.html(); // If it's a lowercase letter, nothing happens to this variable // Shift keys if ($this.hasClass('left-shift') || $this.hasClass('right-shift')) { $('.letter').toggleClass('uppercase'); $('.symbol span').toggle(); shift = (shift === true) ? false : true; capslock = false; return false; } // Caps lock if ($this.hasClass('capslock')) { $('.letter').toggleClass('uppercase'); capslock = true; return false; } // Delete if ($this.hasClass('delete')) { var html = $write.html(); $write.html(html.substr(0, html.length - 1)); return false; } // Special characters if ($this.hasClass('symbol')) character = $('span:visible', $this).html(); if ($this.hasClass('space')) character = ' '; if ($this.hasClass('tab')) character = "\t"; if ($this.hasClass('return')) character = "\n"; // Uppercase letter if ($this.hasClass('uppercase')) character = character.toUpperCase(); // Remove shift once a key is clicked. if (shift === true) { $('.symbol span').toggle(); if (capslock === false) $('.letter').toggleClass('uppercase'); shift = false; } // Add the character $write.html($write.html() + character); }); }); , x, y); }; </script> </head> <body> <body onmousedown="return false;"> <canvas id="myCanvas" width="578" height="200"> </canvas> <div id="container"> <textarea id="write" rows="6" cols="60"></textarea> <ul id="keyboard"> <li class="symbol"><span class="off">`</span><span class="on">~</span></li> <li class="symbol"><span class="off">1</span><span class="on">!</span></li> <li class="symbol"><span class="off">2</span><span class="on">@</span></li> <li class="symbol"><span class="off">3</span><span class="on">#</span></li> <li class="symbol"><span class="off">4</span><span class="on">$</span></li> <li class="symbol"><span class="off">5</span><span class="on">%</span></li> <li class="symbol"><span class="off">6</span><span class="on">^</span></li> <li class="symbol"><span class="off">7</span><span class="on">&</span></li> <li class="symbol"><span class="off">8</span><span class="on">*</span></li> <li class="symbol"><span class="off">9</span><span class="on">(</span></li> <li class="symbol"><span class="off">0</span><span class="on">)</span></li> <li class="symbol"><span class="off">-</span><span class="on">_</span></li> <li class="symbol"><span class="off">=</span><span class="on">+</span></li> <li class="delete lastitem">delete</li> <li class="tab">tab</li> <li class="letter">q</li> <li class="letter">w</li> <li class="letter">e</li> <li class="letter">r</li> <li class="letter">t</li> <li class="letter">y</li> <li class="letter">u</li> <li class="letter">i</li> <li class="letter">o</li> <li class="letter">p</li> <li class="symbol"><span class="off">[</span><span class="on">{</span></li> <li class="symbol"><span class="off">]</span><span class="on">}</span></li> <li class="symbol lastitem"><span class="off">\</span><span class="on">|</span></li> <li class="capslock">caps lock</li> <li class="letter">a</li> <li class="letter">s</li> <li class="letter">d</li> <li class="letter">f</li> <li class="letter">g</li> <li class="letter">h</li> <li class="letter">j</li> <li class="letter">k</li> <li class="letter">l</li> <li class="symbol"><span class="off">;</span><span class="on">:</span></li> <li class="symbol"><span class="off">'</span><span class="on">"</span></li> <li class="return lastitem">return</li> <li class="left-shift">shift</li> <li class="letter">z</li> <li class="letter">x</li> <li class="letter">c</li> <li class="letter">v</li> <li class="letter">b</li> <li class="letter">n</li> <li class="letter">m</li> <li class="symbol"><span class="off">,</span><span class="on"><</span></li> <li class="symbol"><span class="off">.</span><span class="on">></span></li> <li class="symbol"><span class="off">/</span><span class="on">?</span></li> <li class="right-shift lastitem">shift</li> <li class="space lastitem"> </li> </ul> </div> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> <script type="text/javascript" src="js/keyboard.js"></script> </body> </html> I'm drawing text on the screen (mouse coordinates) in this example: http://www.hindbrain.net/ex5.php In order to not have new text overlay old text and become unreadable, I have to clear a background rectangle and then draw the new text. Is there a way to clear the background rectangle so that it is not white or any solid color? Ie, is there a way to just clear it so that the original blue background is still there? thanks, William I'm an intermediate PS user/css coder/etc but I haven't had to design many sites from the ground up. With that said, I now have to design a web site that will work for the 800x600 crowd. What canvas size do I use in Photoshop to work with? Also, what would be the canvas size to use designing for 1024x768 screen resolutions? Thanks. Alright, well I'm needing to resize an image. Not a scaled version, but a 'cropped' version. Like it's called canvas resize in photoshop ect. I hope someone knows what I'm talking about lol Hello, hopefully i can find help here I want to save my canvas-content to a single image-file. There are an approach using todataurl(), which works fine. But not if i draw an image-file (e.g. car.jpg or house.png) to the canvas additionally. It does not return the whole image? Here I have my simple example-code: <head> <script> window.onload = function() { var canvas = document.getElementById("theCanvas"); var context = canvas.getContext("2d"); context.fillStyle = "navy"; context.fillRect(0,0,20,20); var imagefile = new Image(); imagefile.onload = function () { context.drawImage(imagefile, 22, 0,60,60); } imagefile.src = "http://www.sign-arts.de/joomla/images/stories/print_proj/mediclin/icon1.gif"; window.open(canvas.toDataURL('image/png')); }; </script> </head> <body id="bodi"> <canvas id="theCanvas" width="500" height="200" > </canvas> </body> Only the HTML5-methods like fillRect() are rendered to the new window, why this is so? What im doing wrong? Thanx in advance for help bilinok Hello all, I am trying to replicate a style I have seen on the site listed below, where they appear to be using the CANVAS command to create a gradient top and bottom margin. I can seem to find anything online about how to do this but obviously they have figured it out. http://www.xtrememac.com/ Any ideas or pointing me in the right direction are greatly appreciated. Thanks! Is this possible? I'd like to draw a screen using the canvas methods and then overlay html hyperlinks on this (fullscreen) canvas. I have experimented with capturing the mouse click event and know where I clicked on the canvas, but now I'd just like to be able to hyperlink to places right from the canvas. It would be convenient if you could somehow embed hrefs there. thanks, William I have found what seems to be a rather big problem in the HTML canvas When drawing circles, and I presume all shapes, the size of the circle is different based on whether one is filling it, or sketching it. If we have a circle of radius 10 and line width k, and we decide to fill it, that line width will be evenly dispersed about the perimeter of the circle such that half the line width is inside the circle, and half is outside the circle. If, however, the same circle is sketched, the line width will still be the same, but it will now be dispersed entirely on the outside of the circle, thus making it larger. If I am wrong, and this is how figures are supposed to be drawn, or if I am simply not using the right settings, please let me know =) I need to go to the experts here , what I need to do is the following. I have an Adobe Edge animation, I need to take that animation along with a JQuery dropdown menu and put both on one html page. I have basic html knowledge to the point where the edge animation is saved as an html page ( edge automatically does this which includes all the Javascript files separately) So far I'm able to take the edge <div> and ad it to any html page as long as I copy the scripts to the head of that page. The trouble I'm having is adding the JQuery dropdown. It would be impossible for anyone reading this to know EXACTLY wht I mean without seeing the code, I do not want to add abunch of it or add a link to the files until someone replies and can actually look. any help? RD |
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