I've tried to ask this question before, but I failed completely there. After useful input, I decided to leave that one, and to try again.
I'm looking to create a web-based application where users can draw images built from a set of pre-defined icons. There is a need to be able to save the final image (encoded jpg/png), and also save a "current setup" that can be re-loaded later for further editing (a "settings" file?).
My question : What would be the best approach for this matter? Flash+AS3? HTML5+JS? Something else?
For better understanding of what I want to create, here are 2 screenshots that illustrate in what direction I'm thinking:
The drawing application (made in Flash): http://imgur.com/U4GNKJF
The final created picture: http://imgur.com/aCtxwo1
Thanks in advance, and I really hope I've made my question more clear this time.
Since you need advice...
Draw your icons in some art software (even online) and save as transparent PNG's
Look-up HTML5 Drag & drop tutorials that involve "Canvas". You'll want to meaure the positions of objects dragged (mouse position on Canvas) and their order. The drag function could update a JSON String (this hold entries of items, type, position, etc)
Look-up How to save JSON as text file, also how to parse text file as JSON. This becomes the "settings file".
To save images best use PHP language code. PHP must be installed on the server (most have, or is installable or else get a better host). There are tutorials on how to save an image with content from "snapshot of Canvas"
flash is unsupported on IOS and android mobile browsers and google is giving a lower index to websites using it.
I would use javascript with HTML5 canvas with PIXI.JS ,CreateJS or PANDA.JS.
These libraries make it easier to create the canvas elements you need (draggable objects, buttons ) from sprites and adding event listeners to them.
And drawing graphics on the canvas (lines, shapes).
Since you have a lot of sprites you can pack them in a spritesheet with TexturePacker for faster loading ( and PIXI works great with spritesheets).
You can package this web page to android/ios with phonegap,ionic,crosswalk, cocoonjs etc ( i recommend ionic + crosswalk webview it gives great performance)
for saving i would also use a json file to save the setting . You can use PHP to load and save it.
Related
I'm looking to implement a video editing feature like that of featured here https://clideo.com/video-editor.
I'm planning to use Vue 3 with a Laravel backend, but is there an ideal framework to use for a web application like this, or should I just try to reverse engineer/hack my way to a working implementation?
Sorry if this is the wrong place to ask, I just haven't been able to find an answer.
Thanks
Video editor consist of two important parts
1)A Timeline that represents sequence.
2)A Output window to show output of timeline.
-Clideo uses div and html elements positioning to generate timeline but a better alternative is to use Canvas and draw a timeline on it just like in veed.io
-For video output again you have to use canvas and webGL to draw each and every frame one by one.
you wont be able to edit video on backend and send edited multimedia for each change user makes you need to find a way to do in on client using webcodec.
For the choice of framework if you are having canvas and webGL do all the rendering of timeline and output then it dosent matters you will spend more time with drawing functions.
Almost every video editor has a timeline. But only in some of it (https://wave.video/tools/video-marketing/promo-video-maker) is divided into several ranges. An additional advantage will be the grid on the line. You can also easily manage layers and frames.
I am currently creating a web app that will allow users to upload their highlights / clips from Overwatch and I wanted to use JavaScript to detect what character they were playing as.
I currently have it taking a still from the video that they upload, but wanted to use JavaScript to detect the image at the bottom left of the screen and get a result for which character it is:
I am unaware of any libraries that can do this while not over complicating my needs. Furthermore if I was to use an AI library such as tensor (which im not even sure if it would work), would I be able to use the training data if I bundled it as an app for the app store?
If the image in the bottom left is the same, you can accomplish this using canvas.
You would need to chop the whole image down to just the avatar, and then compare the avatar to ones on file.
The comparison would require the base64 of the image, and compare those bases. If they are the same, voila!
I need to display a runtime-generated image (mostly consisting of nice-looking boxes, lines and text) on a webpage. We're currently using ASP.NET MVC3.
The problem is, I haven't really done web development before, and I have no idea how to go about drawing an arbitary diagram on a webpage. Do I use some sort of javascript? How, and what do I use? Do I generate the image on the server somehow and simply display it? Something else?
I have no idea where to even start, let alone solve the actual problem...
It depends on the target browser.
If you target the most modern browsers, you can use an HTML5 Canvas and draw on it using JavaScript (see http://www.williammalone.com/articles/create-html5-canvas-javascript-drawing-app/).
If you're targeting other browsers (as well), the easiest is probably to generate an image on the server side (GIF/JPG/PNG). Your HTML page then contains an IMG tag with the SRC parameter set to the page that generates and returns the image. You can find an example at this page: http://www.sitepoint.com/generating-asp-net-images-fly/ (this uses ASP.NET to generate the image).
Roy Dictus fairly well described the overall approach you'll want to take. If you decide to target modern browsers and use javascript, I'd suggest you look at Processing.js. It's a javascript port of a popular Java library, and the web page has some code samples to show how you can create both static drawings and animations with some simple code.
I want to create not complex interactive web application. It has some pinboard and user can create many simple objects on this pinboard (e.g. many small circles). After this user can:
move these objects
delete some of them or create new ones
make multiple selection and move/rotate elements of selected group
place members of the selected group in some special order (grid, line, circle, etc)
Zoom in/out pinboard
I think that I can use Flash/Flex or JavaScript/SVG/VML for this purpose. Disadvantage of Flash is that user must have plugin. Minus of JS/SVG/VML is that there aren't such powerfull developing tools as in Flash case, but if we use some library (like http://raphaeljs.com/) application won't require flash plug-in.
I'm finding right tool for this aim. So give me some recommendations, please. Thanks in advance.
I believe that you can achieve your goals without Flash using HTML(5), JavaScript and not the least the Canvas element present in HTML5.
Bottomline is, unless you today require your application to animate a lot of objects with framerates approaching three digits, the above should suffice fine and will also pair you with a prospective Web development platform. I am often sceptical of the new stuff, but HTML5 and Canvas are fairly standardized, patent-free and are being actively adopted.
The only benefit of going with Flash that I can think of is being backed by a rich API that does 2D as well as 3D, and the fact that you can later port your ActionScript code to say, JavaScript when you finally decide to go with HTML+JavaScript instead. Aside from having to perhaps rewrite part of your drawing stack, your ActionScript code will require minimal (syntactic mostly) changes.
I would still advise you to go with my first suggestion, unless you need live (camera) video publishing, 3D, sound editing and few features not available easily outside Flash Player. Which I don't think you will need.
You might want to have a look at existing similar projects, such as SVG Edit (MIT license).
I am looking for a Flash based image uploader with resize and possibly rotate function.
I have checked many possibilities, and the very best in simplicity and unser experience I found is Kroppr at a very affordable €29/license.
The downside is, it comes with encrypted PHP code to bind the product to a subdomain. That is understandable, but while I'm perfectly happy to pay money for a tool as great as that, and ready to sign all sorts of legal agreements to protect the license, I am not ready to use encrypted PHP code, especially not from an outlet that doesn't even have a postal address on its web site.
Does anybody know an Open Source or commercial solution that comes close to Kroppr and ships with source, or allow for full customization and free definition of the server-side backend?
The features in detail:
Rectangular selection to crop image, slider or similar to zoom
Optionally: Rotating
"Accept" and "Reset" buttons, "accept" triggers a call to the server and submits the image
Full visual customizability (at least background and text colours)
Possibility to rename all controls
The server side technology would preferably be PHP.
http://deepliquid.com/content/Jcrop.html i love this one, every easy to use and tons of features. i know your searching a flash cropper but this question is tagged with js too so....
I found these three image utilities during my search:
Flex Image Cropping Component
HOW TO CROP AND RESIZE AN IMAGE USED AS BACKGROUND FOR CANVAS
Building an image-viewing widget with ActionScript 3.0
The first one is an open source flex component using an MIT license. The second one is a how to,with full source available. It doesn't have a sizable box, but it seems ok otherwise. The last one is also a how to article from adobe.com with source available.
Here is a list of good javascript based croppers:
Yahoo! UI ImageCropper
Jcrop
MooCrop
UvumiTools
PHP & jQuery Image Upload and Crop
Here is a list of action script based croppers:
Flex Image Cropping Component
Image Crop
http://www.adylevy.com/index.php/2009/07/22/multiple-files-uploader-with-preview-on-client-side/
OR
http://www.resize-before-upload.com/
...took a bit of searching =)
I would take a look at the free pixlr editor and their developers API : http://pixlr.com/wiki/developer
I've used RadActive's I-Load component before, with great success. The UI customisation options are a little limited, but as far as functionality goes, I'm pretty sure it meets all your requirements.
EDIT: You don't specify what server-side technology you're using (if any). I'm pretty sure I-Load is designed for ASP.NET - this may or may not be an issue for you.
This is also a nice once and its only $10.
http://www.shift8creative.com/projects/agile-uploader/index.html
Still doesn't have image rotation/cropping. I most definitely do plan to add that, but after checking out all the things I could find I still wasn't happy. I researched out all the particulars and just ended up building my own. You're welcome to use it if you like and haven't found something else by now. Keep checking the link, I'll update it to include the rotation and crop feature along with multiple image uploads.
Something like this?
http://matrixoft.infunity.com/agents/calvin/tmp/forPekka.html
I'm perfectly happy to pay money for a tool as great as that
To carry out the responsibility of posting the answer for stackoverflow users, here is part of the crop image code:
var tNewImage:BitmapData=new BitmapData(mouseX-vCropX,mouseY-vCropY,true,0);
iImg.getChildAt(0).x = vSize/2 -vCropX;
iImg.getChildAt(0).y = vSize/2 -vCropY;
tNewImage.draw(iImg);
Where iImg is the movieclip containing the image with the image center positioned at (0,0) , vSize is the image dimension, vCropX and vCropY is the top left cropping coordinate. The tNewImage BitmapData is used for constructing the new Cropped Bitmap image