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Does anyone have a simple solution to extract frames from a gif using javascript?
I know some online tools like Ezgif and Gif-explode, but I'm wondering if this is also possible using just javascript?
For a client-side solution I'd recommend to have a look at libgif-js.
It allows to step to a specific frame in the GIF and you could then use the Canvas API to capture a single frame by drawing the image to the canvas and then getting the Data URL.
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Im working on a project where I need to visualize the G-force on a spaceship. I want to accomplish this with creating an accelometer (something like a seismogram see picture for an example)
Is is possible to create this using CSS/JavaScript?
The accelometer needs to run infinite creating random data for the G-force on the spaceship.
It sure is possible with CSS and JS.
The question is wether you want to do it that way.
If I were you I'd choose to use the HTMLCanvasElement to display the data generated by either JavaScript on the client side or the server side language of your choice on the server.
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I wasn't sure if this question has already been asked before but I was wondering how you produce the interactive dotted text and the running tiger animation you see in the middle of the run4tiger website?
http://run4tiger.com/
Any information would be appreciated.
They are using canvas elements to achieve this.
The canvas will catch the mouse over events and then react accordingly.
The loading tiger screen was drawn using SVG.
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Lets say I have an ecommerce site with 15,000 image elements to insert into the html, whats the most efficient method using javascript to increase efficiency and user experience?
Load the images only when they are in the view port.
This question tells you how:
How do you make images load only when they are in the viewport?
Preload the images and use the cdn to host your images.
You can use something like https://github.com/thinkpixellab/PxLoader to preload the images.
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I know its not an acutal problem but I found this demo http://cssdeck.com/labs/interactive-particle-logo
Can someone explain how draw png images on canvas with other objects?
In that example they are using a library called particle slider which takes an image and draws it in particles.
See http://particleslider.com/ for more details.
The exact method you want is here http://particleslider.com/documentation/api#ParticleSlider.getPixelFromImageData
Going into how to write the library from scratch is probably a bit to advanced for a stackoverflow question :)
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I want to put a sprite image in my website, and use javascript to crop it to many separate images, then put these images into an image array.
Is this possible? Thanks.
Take a look at jCrop, if you're using jQuery or JavaScript Image Cropper UI if you're using prototype.
What server-side language are you using? If you just want a straight crop w/o the graphical interface it might be better to do it server side.
If you're using PHP, check out this tutorial on nettuts
If you're using Ruby on Rails, check out Paperclip