Rotate, Skew, Resize For DHTML Game
Jul 23, 2005
Are there methods for manipulating images in JavaScript that would allow me
to write functions to rotate, skew, mask and resize images (bitmaps)?
The functions need to be fast enough for use in a top-down scrolling game.
Or would I be better off preprocessing all of the images with something
server side such as PHP and then preloading them into my JavaScript already
manipulated?
The only thing I don't like about the idea of preprocessing the images is
that I will have to preload a very large number of images, ie all of the
sprites rotated at different angles, resized at different sizes etc.
I am considering using Flash but because it would involve learning
ActionScript I would prefer to do it with a combination of JavaScript and
PHP. The other alternative that I was considering was using SVG, but not
many people have an SVG capable browser or have downloaded the SVG plugin.
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Sep 30, 2010
My ultimate goal is to generate a puzzle, and allow the user to solve it. When the user makes a guess, I will check their guess to make sure they did not make a mistake. If they did make a mistake the cell/textbox should turn red until they fix the problem. Once the board is filled, I will make one last check to make sure they have everything correct.So far I have a game board with text areas, and that is about it. I have ideas about how to do the rest, but I have a few hang ups. My idea was to have a matrix that represents the game board. I have already given all of the text boxes names that correspond to their positions in the matrix. I need help writing some kind of loop to go through the whole game board, and if a value is found store that value into the matrix in it's proper place. I also need help doing the reverse, taking values from the matrix and print them into the text boxes.
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Oct 28, 2010
Im using the cycle plugin trying to make a banner slide tha is 100% the width of the window, my problem is that when i resize de window the banner does not align center, it stays somo what left align. So is there a way to keep the slides align center after you resize the window usingthe cycle plugin? or is there another plugin that i can do that? I attached a image to ilustrate, the white banner with the cat should align center when i resize the windows but it stays left align.
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May 31, 2011
I'm trying to develop a function to resize a control upon window resize. In regular javascript I would make a global array of control names and append code to the event that cycles through and resizes each control.For example
var proportionalizedImages=new Array();
proportionalizedImages.push(document.getElementById(ctrl));
if (window.addEventListener)[code]....
I'm wondering if there's a more elegant way to do this in jQuery. I've played around with it a bit, but i'm unsure how to get the control object to the resize function triggered by window resize without a global variable.
jQuery.fn.resize = function(max_size) {
$(window).bind('resize', $(this), resizeTriggered);
}[code]....
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May 15, 2011
I'm looking for a resize function that will resize a window around content, in my case a div.
I've googled away but not come up with anything as yet so would like to ask if anyone knows a plug in that can do this simple task.
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Nov 19, 2011
I'm trying to scale the text with the size of the window (I've also got all the layout sizes in ems, so this should keep the aspect ratio of everything the same as the window is resized). The code that I've got at the moment doesn't do anything -
$(window).resize(function() {
var $width = $window.width() / 10;
$("body").css("font-size", $width);
});
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Apr 10, 2011
Is there anyway to make a custom resize function that resizes one of my div elements on the webpage the same amount of pixels as the browser window gets resized?
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May 26, 2011
I am looking to resize my entire webpage down to specific smaller resolution and add it to an iframe. I do not need it to "auto-resize" depending on viewpoint, just shrink it to a smaller size.How can I use javascript to resize the entire page to my dimensions?
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Jan 20, 2011
I am working on a site and essentially what I need to do is to autopost a blog entry that rotates based on each day. code...
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Mar 15, 2006
Is it possible to rotate pictures 45°CW for each click using javascript?
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Aug 22, 2007
I would like to be able to have my "page" online be at a 45degree angle, rather than 90degrees... does that make sense?
As in if something is square, use photoshop ctrl-t to rotate the square object to 45degrees rather than 90. Can I do this in a browser window?
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Jul 27, 2010
I'm trying to rotate a div by 180 degrees on its Y-axis using javascript. It's triggered by a click event listener and needs to keep rotating the same way, 180 degrees, forever.
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Mar 11, 2009
I'm working on a small scrolling popup window that mimicks an instant message window. I've currently got it all set up and working however I would like a way to have multiple var html_code options that can be picked at random. For example, each option would have a different image and text in the box.
Here's the header code...
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Mar 31, 2010
Rotate and zoom image as in link below.
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Oct 10, 2011
I know very little about javascript, but was wondering if something like this can be done?
Would it be possible (with mootools or jquery) to have homepage that will rotate its home page content forwards and backwards based on either triangle or square? ie, you can rotate through 3, 4, etch home pages?
Sort of like a slider, but it rotates off a center axis of the triangle or square?
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Dec 20, 2011
I want to be able to rotate Adsense ads. 3/4 of the time, it will be someone else's. 1/4 of the time, it will be mine (my code is displayed already). However, the code I tried doesn't work.
<script language="JavaScript">
images = new Array(4);
//the following string is really all on one line
images[0] = '<script type="text/javascript">google_ad_client = "ca-pub-4811954214954647";google_ad_slot = "2713945203";google_ad_width = 728;google_ad_height = 90;</script><script type="text/javascript"src="http:
//pagead2.googlesyndication.com/pagead/show_ads.js"
></script>';
[Code]....
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Jun 7, 2009
Is there any way to rotate an image by specified angle
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May 7, 2010
Is it possible to rotate an object by n degrees where n=0 to 360?
I've seen a few bits about rotating by 90 degrees and inverting etc, but am having trouble finding information on smaller increment rotations.
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Oct 3, 2003
Have a look at this maths game I made. It tests you on adding, subtracting, multiplying and dividing and has three different levels.
Note-you must save the code below as mathsgamefinal.htm for the reset button to work.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta http-equiv="Content-Language" content="en-gb">
<title></title>
</head>
<body bgcolor="#FF0000">
<script type="text/javascript">
function next1(){
var outof=document.getElementById('outof').value;
if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="a"){document.getElementById('next').value='Enter' add(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="m"){document.getElementById('next').value='Enter' times(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="t"){document.getElementById('next').value='Enter' minus(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="d"){document.getElementById('next').value='Enter' divide(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Enter" && document.getElementById('answer').value==(cr)){ document.getElementById('question').value='Correct' document.getElementById('next').value='Next' document.getElementById('outof').value=parseInt(document.getElementById('outof').value)+1; document.getElementById('score').value=parseInt(document.getElementById('score').value)+1; pc();}
else{ document.getElementById('question').value='Wrong. Answer= '+cr; document.getElementById('next').value='Next' document.getElementById('outof').value=parseInt(document.getElementById('outof').value)+1; pc();}
document.getElementById('answer').select();
}
function add(){
ea1=(Math.floor(Math.random() * (1 - 10)) + 10);
ea2=(Math.floor(Math.random() * (1 - 10)) + 10);
ma1=(Math.floor(Math.random() * (21 - 49)) + 49);
ma2=(Math.floor(Math.random() * (21 - 49)) + 49);
ha1=(Math.floor(Math.random() * (111 - 299)) + 299);
ha2=(Math.floor(Math.random() * (111 - 299)) + 299);
if(document.getElementById('level').value=="e"){document.getElementById('question').value=ea1+' plus '+ea2; cr=ea1+ea2}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=ma1+' plus '+ma2; cr=ma1+ma2}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=ha1+' plus '+ha2; cr=ha1+ha2}
}
function times(){
em1=(Math.floor(Math.random() * (2 - 10)) + 10);
em2=(Math.floor(Math.random() * (2 - 10)) + 10);
mm1=(Math.floor(Math.random() * (11 - 19)) + 19);
mm2=(Math.floor(Math.random() * (6 - 12)) + 12);
hm1=(Math.floor(Math.random() * (21 - 29)) + 29);
hm2=(Math.floor(Math.random() * (21 - 29)) + 29);
if(document.getElementById('level').value=="e"){document.getElementById('question').value=em1+' times '+em2; cr=em1*em2}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=mm1+' times '+mm2; cr=mm1*mm2}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=hm1+' times '+hm2; cr=hm1*hm2}
}
function minus(){
et1=(Math.floor(Math.random() * (10 - 20)) + 20);
et2=(Math.floor(Math.random() * (1 - 10)) + 10);
mt1=(Math.floor(Math.random() * (50 - 99)) + 99);
mt2=(Math.floor(Math.random() * (20 - 50)) + 50);
ht1=(Math.floor(Math.random() * (350 - 1000)) + 1000);
ht2=(Math.floor(Math.random() * (350 - 1000)) + 1000);
if(document.getElementById('level').value=="e"){document.getElementById('question').value=et1+' minus '+et2; cr=et1-et2}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=mt1+' minus '+mt2; cr=mt1-mt2}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=ht1+' minus '+ht2; cr=ht1-ht2}
}
function divide(){
ed1=(Math.floor(Math.random() * (2 - 10)) + 10);
ed2=(Math.floor(Math.random() * (2 - 10)) + 10);
md1=(Math.floor(Math.random() * (11 - 19)) + 19);
md2=(Math.floor(Math.random() * (11 - 19)) + 19);
hd1=(Math.floor(Math.random() * (21 - 29)) + 29);
hd2=(Math.floor(Math.random() * (21 - 29)) + 29);
ed3=ed1*ed2;
md3=md1*md2;
hd3=hd1*hd2;
if(document.getElementById('level').value=="e"){document.getElementById('question').value=ed3+' divided by '+ed2; cr=ed1}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=md3+' divided by '+md2; cr=md1}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=hd3+' divided by '+hd2; cr=hd1}
}
function answerreset(){
if(document.getElementById('answer').value=="answer"){document.getElementById('answer').value=''}
}
function pc(){
document.getElementById('scorepercent').value=document.getElementById('score').value/document.getElementById('outof').value*100;
document.getElementById('scorepercent').value=Math.round(document.getElementById('scorepercent').val ue);
}
</script>
<table border="0" width="198" height="180" bordercolor="#000000" style="background-color: #FFFF00; border-style: solid">
<tr>
<td height="33" width="99" colspan="2">
<p align="center">
<select size="1" name="type" id='type'>
<option value="a" selected>Add</option>
<option value="t">Take away</option>
<option value="m">Multiply</option>
<option value="d">Divide</option>
</select></p>
</td>
<td height="36" width="99" colspan="2">
<p align="center">
<select size="1" name="level" id=level>
<option value="e" selected>Easy</option>
<option value="m">Medium</option>
<option value="h">Hard</option>
</select></p>
</td>
</tr>
<tr>
<td height="36" width="198" colspan="4">
<p align="left">
<input type="button" name="T1" id='question' value="Click next to begin" style="background-color: #FFFF00; border: 0 solid #FFFF00">
</p>
</td>
</tr>
<tr>
<td height="33" width="66">
<p align="center"><input type="text" name="answer" size="6" id='answer' onclick=answerreset()></td>
<td height="36" width="66" colspan="2">
<p align="center"><button onclick='next1()' id='next'>Next</button></td>
<td height="33" width="66">
<p align="center"><button onclick='window.location="mathsgamefinal.htm"'>Reset</button></td>
</tr>
<tr>
<td height="36" width="66">
<p align="center">Score %:</td>
<td height="33" width="66" colspan="2">
<p align="center">Score Marks:</td>
<td height="33" width="66">
<p align="center">Out of:</td>
</tr>
<tr>
<td height="33" width="66">
<p align="center"><input type="button" name="T1" size="3" id=scorepercent value="0"></td>
<td height="33" width="66" colspan="2">
<p align="center"><input type="button" name="score" size="3" id=score value="0"></td>
<td height="36" width="66">
<p align="center"><input type="button" name="outof" size="3" id=outof value="0"></td>
</tr>
</table>
</body>
</html>
Any feedback would be much apprieciated...
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Sep 25, 2006
I have been making a game in javascript. The game works now but I would like to know if the user has completed the game. Hope some one have an idea on how to find out if the user has completed the game. Code:
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Feb 14, 2003
I am trying to get a line of text that a user types into a textfield to appear somewhere else on the screen. AT teh moment when the user presses submit it refreshes the page and does write the text line to the screen but it is a brand new page and I lose all my content.
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Sep 29, 2009
I am looking for the best way to rotate the displayed text . Text should also fade in and out. I have tried the innerfade plugin but was wondering what else might be available.
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Sep 15, 2011
I've been searching for a way to rotate an image a div say 90 degrees when a link is clicked, but can not seem to get it to at all. Here is some code I'm trying at the moment amongst many others, using thejQuery Rotateplugin.
$('#canvas a').click(function() {
$('#circle').rotateLeft([angle=90]);
return false;
});
Edit: I can get it to kind of work with css3, although it doesn't animate, and it only rotates once. I would like to keep rotating each time a link is clicked.
$(document).ready(function(){
$('#canvas a').click(function(){
$('#circle img').css({"-webkit-transform" : "rotate(+45deg)"})
});
});
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Jan 4, 2010
I am building a site to replicate an existing site for a non-profit.[URL] want to have a rotating image on their home page, and I have it working using the following jQuery Code:
<script type="text/javascript">
$(function() {
// create the image rotator
setInterval("rotateImages()", 4000);
[code]....
The problem is that I can't figure out how to clear the previous slide's decription (in the <p> tag of each Div). At present the descriptions do rotate, but they are all visible since they are within the stacked Div's. How can I get the descriptions to show and hide in sync with the images?
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Mar 30, 2010
I am trying to rotate a subtree of images at
but so far i have not been able to make it continuous...
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May 13, 2009
I need to write text in the HTML page but I need it to appear vertically rotated not horizentally.
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