Transitioning the image from one point to another

I am currently working on a unique single-page website and I have been experimenting with creating dynamic background animations that change as the user scrolls. Imagine my website is divided into four different sections, each with its own distinct background.

By using jQuery, I have managed to determine the percentage of the scroll being used. As an example, let's assume each section corresponds to 25% intervals (although this may not be entirely accurate). So, from 0-25% we have backgroundA, from 25-50% we have backgroundB, from 50-75% we have backgroundC, and finally from 75-100%, we have backgroundD.

The backgrounds are similar but transition seamlessly from one to another like a ping-pong ball bouncing back and forth across the website. The icons also change accordingly; for instance, a house image might appear on the left in the first background while a magnifying glass image might be displayed on the right in the second background, both sized at 100px by 100px.

What I aim to achieve now is to create a smooth transition or "fluidity" between these backgrounds so it appears as if backgroundA gradually morphs into backgroundB.

I have come across websites showcasing this kind of behavior before, so I believe it can be done. However, I could use some guidance on how to implement it myself.

If you require any further clarification, please feel free to reach out.

Thank you! :)

javascriptjquerycss

Answer №1

By following the example provided to your original post, you can achieve the desired effect by slightly overlapping background images vertically and using a script called bg.js to trigger step functions based on the scrollTop position. These functions will animate the widths of the backgrounds, creating a fluid line that appears to move back and forth.

Update -- If you want to interact with elements on the page based on scroll position, check out this quick demo I put together for a floating top navigation element - http://jsfiddle.net/jmsessink/MyL6Y/2/

The key is in the math calculation - 

page.$window.scrollTop() / (page.bodyHeight - page.windowHeight) * (page.navWidth - page.navDivWidth);

Hopefully this helps you get started on your project.

Update #2 -- Here's some code that demonstrates how to achieve what you're looking for (just replace the background colors with angled lines) - http://jsfiddle.net/jmsessink/MyL6Y/3/

Answer №2

Implement the scroll event listener to dynamically adjust elements based on scrolling:

$(window).scroll(function(){
    var docHeight = $('body').height() - window.innerHeight;
    var scrollY = window.scrollY;
    var scrollPercentage = scrollY / docHeight;

    $('#some-element').css({'bottom': 50 + scrollPercentage * 20 + 'px'});
});

The specific functionality will vary depending on your needs, but essentially you're calculating the scroll position and using it to modify element properties.

In the example provided, the ribbon consists of four divs initially set to width = 0 that expand as the page is scrolled, with the last div expanding in height. Simply capture the

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