Html5 Canvas Game Drawing?
Mar 21, 2010
I am trying to create an Asteroids type game using JavaScript along with html5's canvas element for drawing. I have searched around and have looked at examples but I can't figure out what is wrong with my rendering that I do in the game loop that is run every frame. The problem appears to be only that the canvas is not cleared at the beginning of each frame but I feel there might be something wrong also. The code used and shown below only works in Firefox but not Google Chrome or Safari.
[Code]...
View 2 Replies
ADVERTISEMENT
Oct 21, 2009
I'm having a problem with the <CANVAS> element in JavaScript. here's what i'm trying to do: I need 3 different canvas elements for writing a signature to. they must all 3 be visible at the same time
My problem that i'm having is that i can't seem to get the code to work which will write to more than one canvas.
[Code]...
View 2 Replies
View Related
Dec 27, 2010
This is a question concerning the SVG plug in,Here is the code
<html>
<head>
<script language="javascript" type="text/javascript" src="jquery.js"></script>[code].....
1.SVG isn't drawing the circle
2. var svg is undefined keeps popping up.
View 2 Replies
View Related
Oct 21, 2011
I've coded in Java before but I'm still having some trouble. I am trying to draw a ribbon type shape on an <canvas> element and for some reason, when I turned it into a function, it seemed not to work. Here is what I have for drawing the ribbon with a function:
function drawRibbon(height,width,Canvas){
var c=document.getElementById(Canvas);
var cxt=c.getContext("2d");
cxt.fillStyle="#bb0044";
cxt.beginPath();
cxt.moveTo(0,0);
cxt.lineTo(0,height-50);
cxt.lineTo((width-20)/2,height-100);
cxt.lineTo((width-20),height-50);
cxt.lineTo(width-20,0);
cxt.shadowOffsetX = 5;
cxt.shadowOffsetY = 10;
cxt.shadowBlur=10;
cxt.shadowColor = "black";
cxt.fill();
cxt.shadowOffsetX = 0;
cxt.shadowOffsetY = 0;
cxt.shadowBlur=0;
cxt.closePath();
cxt.beginPath();
cxt.strokeStyle = "#ffcc22";
for (i=5;i <= 135; i=i+15){
cxt.moveTo(5,i);
cxt.lineTo(5,i+5);
cxt.stroke();
}}
drawRibbon(200,120,navCanvas);
I feel like it has something either to do with the function definition, or the call. Before this script is executed, i create a canvas in the following way:
<canvas id="navCanvas" height="200" width="120">
Why it is not displaying.
View 3 Replies
View Related
Nov 1, 2011
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:
[Code]...
View 1 Replies
View Related
Jun 30, 2011
I'm trying to figure out how to add images to a canvas element. I found a good site, but for some reason my images turn out bigger than expected.
Here's what I use (It's from different functions in different places, but essentially that is the relevant code). Assume there is a gameObject which has all the functions that I use. I tried replacing the functions with constant values but that made no difference:
PHP Code:
Somehow the image shows up much bigger than 69 pixels width and height. When I make the canvas smaller the image scales down with the canvas. So when I make the canvas twice as small, the image becomes twice as small as well. Seems like it is not using pixels as units.
View 1 Replies
View Related
May 27, 2011
Picture:
Doing in html5 canvas, so JavaScript (was not sure where to post, but here I go...). Above is a link to picture that I need to do. It is clock-like. I will have to draw a circle, and two lines, from centre to according points on circle. That is not a problem, the thing I can not do is to fill upper and lower parts of circle that those two lines divide, so upper part of a circle should be e.g. red, and lower blue. (Plus, it would have to bi gradient, to look more appealing).
View 1 Replies
View Related
Nov 22, 2010
I am trying to get a function to draw 5 randomly sized and colored rectangles nested within each other. Meaning each rectangle should not go outside the boundaries of the rectangle it is in. The color thing I've got down in a randomColor() function. It's the nesting rectangles inside rectangles that is confusing me (hense me being up for the past 4 hours trying to understand it) I started out with very simple code just making 5 rectangles of reducing sizes nested in each other, then added the Math.random to randomize all the sizes. Now I'm at this point and have lost my way. I added a bunch of comments in my code so maybe you'll understand what I'm trying to do.
[Code]....
View 3 Replies
View Related
Oct 27, 2011
I have the following html file
[Code]...
Now this code works on ios safari 4.2 and later but i can't get it to work on ios safari 4.1. On 4.1 it displays the canvas but will not draw the image. The debug console shows no errors. Is there anyway to get it to work, or is 4.2 the cut off point for even the most basic canvas operations?
View 1 Replies
View Related
Jul 17, 2010
Is it possible to trigger mouse events with shapes drawn in an HTML5 canvas? I want to create a page with drawn elements that you can mouseover and pop up a dialogue box. I also want the shapes to react with some type of feedback. I'm hoping I can do this with javascript instead of Flash but haven't found a way to do it that's simple enough to make it worth it.
View 1 Replies
View Related
Jul 12, 2011
I want to delete some lines on the canvas that i have created in HTML5 (with the <canvas> tag). I know one solution and that is using clearRect() (give this function the HEIGHT and WIDTH of the canvas and you clears the whole canvas.).But i don't want to clear the whole canvas, i only want to delete a few lines made by the function lineTo().
View 1 Replies
View Related
Mar 16, 2009
I have a menu in which is applied typeface script. Typeface 0.11 version doesn't support hover on links. There is an experimental version but doesn't work very well for me, so i tried to implement hover by myself.
Problem is: hover works pretty well changing canvas context property fillColor and then calling fill(), but the stroke on hovered voice remains on another color. Difficult to explain, so i put some test code online: TEST CODE As you can see, passing with mouse on the menu voices triggers the hover and the element change, but remains bordered in red.
[Code]...
View 5 Replies
View Related
Aug 9, 2006
I heard or read that the next version of HTML will provide long-overdue drawing commands.
Which version of Firefox, Opera or IE supports such new fancy stuff?
View 7 Replies
View Related
Jul 23, 2005
I need to use javascript's graphics API to draw the letters of
the alphabet. If necessary, I can map out all 26 letters myself
and use drawline() to draw them, but I am hoping someone out
there might have a better suggestion. The user will click a spot
on the canvas, and the script will draw one of the letters at
that spot.
View 2 Replies
View Related
Jul 23, 2005
Is there a small graphics library that I can use? All I need to do is
draw a line of a nominated thickness and colour between two specified
points and to, at some later time, "delete" the line?
I've found a few offerings but either they weren't multi-browser
compatible or they were too big for me to consider (20K instead of 2 or 3K).
View 8 Replies
View Related
Jul 31, 2002
An interesting way of drawing a line interactively without the need for any plug-ins....
View 6 Replies
View Related
Oct 6, 2009
i want to let the user draw image or drawings on web page using html canvas element like stuff and then provide them to save that image or drawing on server so that next time they can get it as it was before to edit further.
View 1 Replies
View Related
Nov 19, 2011
We currently have a website that uses the .beforeAfter plugin to switch between two images. In addition we would like to add the possibility to draw a line and/or box using a boxer like option. All our attempts have been unsuccessful so far.
Could anyone tell us if and how it is possible to combine the .beforeAfter option with a drawing line/box one?
For curious users, here is the website we are currently working on:
[URL]
View 3 Replies
View Related
Dec 8, 2010
I want to create a drawing board in an html page were i can draw anything by dragging the mouse. and when i have done the drawing, i want to create an image of that drawing,
i found some examples doing this but so far all were using html 5, my requirement is to support most of the available browsers.
does anyone knows how i can do it.
i found one link which had what i required, [code]...
but in this the only problem is that if i drag my mouse faster, the draw line is discontinuous. i want it to be continuous free flowing colored pixels.
View 1 Replies
View Related
Oct 27, 2009
I'm trying to complete an application drawing of graphs or bar charts
I'm attempting to write a script that reads five numbers between 1 and 30.
For each number read, output XHTML text that displays a line containing that number of adjacent asterisks.
This is code I've come up with so far.
<?xml version = "1.0"encoding = "utf-8"?>
<!DOCTYPE html PUBLIC "-w3cDTD XHTML 1.0 StrictEN"
"http:www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns = "http:www.w3.org/1999/xhtml">
[Code].....
View 1 Replies
View Related
Sep 30, 2009
I am working on an application where the user is able to draw using square images placed using absolute positions. The user can draw any shape but it must always be connected. I now need to work out the outline of the shape they created. The only information I have is the x y of the pictures that were placed. Its driving me crazy... I tried to work out a system of looping through all the pictures and seeing if there were any images touching.
My most recent idea was to make the javascript select the images and see if I could get the coordinates of the shape from there... In simple I need a way of merging the images into a shape rather than separate entities.
View 2 Replies
View Related
Jun 15, 2011
I want to draw growing circles like a darts board and like attached picture using jQuery (I prefer) or another javascript library.
View 7 Replies
View Related
Jul 2, 2009
I adapted Bresenham line drawing algorithm to draw a dashed line. I want to count the number of dashes. The dashes extend from one city on a map to another city. I don't want the dashes to obscure the city marker which is a small black dot, so I added some logic to skip dashes at the start of the line and at the end of the line. But this logic is confounding my attempt to count the dashes and I haven't been able to figure out why. The function should return the number of dashes as 'count'.
View 3 Replies
View Related
Jul 22, 2009
I am trying to design a system that allows users to draw on a whiteboard with different colors, save their drawing into hidden input boxes in the form on the page, then they can click Save Logo to save it to process it through PHP. I have the whiteboard that allows them to draw, but I am lost as to how to get the thing to populate the hidden input boxes.
So, I have the following code:
<HEAD>
</HEAD>
<BODY>
[code]....
What I am trying to do is use the function mousedown(e) to include an event to update a hidden input box with the value of the TD's background color that the hidden input field is attached to, so that it can be tracked when the user hits Save Logo at the bottom of the page. When they hit Save Logo, I want the form to post to itself, go through each of the input hidden fields and capture the color for each table cell, then generate an image based on the generated array, save it to a file on the server with the user's $_SESSION['userid'] as the filename + .jpg.
The problem is, though, that I do not know how to tell JavaScript to do this in the function mousedown(e) code. Also, look in the function table_create and see if I am naming the hidden input boxes correctly; not sure if it will generate the wanted result.
Just a note: I can handle all the PHP handling of the form, I just need help with the Javascript.
Edit: I attached the entire script/page to this post because so many functions rely on each other to operate, and I'm not exactly sure which function will need to be modified to get the desired result. Also, you can copy the code to a .php file to see what it looks like (as that may assist in demonstrating exactly what I'm trying to do, visually).
Edit 2: I suppose what I need to find is how to get the JavaScript to assign a value to the hidden input field that has the same id as the TD field that it needs to be linked to.
View 3 Replies
View Related
Aug 6, 2009
do you know if it is possible to use selectors for a video tag?For example:
$(this).find('div.misc').find('ul').addClass('thumb-fila').find
('li').find('video').each(function(){
});
View 5 Replies
View Related
Jun 30, 2011
I'm trying to write a site a hosts some of my own videos. I want to have a list of videos, each as a link, and when I click on one I want it to load on that same page by graying out everything else but the video. I'm using html 5 and css and I can get the video to come up, but the problem is that when I go to that page, all of the videos load. If I play a video from the pop up window and then close the window, the video will keep playing.
View 5 Replies
View Related
