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    3D Curtain Template

    3D Curtain Template

    Creating the structure

    The HTML structure is quite basic: for each block of content we created an element containing a div.cd-block and 2 div.cd-half-block. The first .cd-half-block is always empty and is used to set the background image, while the second contains the text paragraph.

    Website preview with three columns, one with an image, two with text

    Here’s the structure code:

    Colorful code over black background

    Adding style

    On small devices, we didn’t implement the curtain effect so you’ll see a basic layout with the list of all the sections (you can have a look at the source code for more details).

    On desktop devices (viewport width more than 1170px), we assigned the position: fixed and a top: 0 to the .cd-block elements in order to place them on top of the screen (this way they are one on top of the other). Since their containers – .cd-section – have a height: 100vh (and position: static), they still occupy their own space (that way we can scroll the page).

    Besides, we assigned a translateX to each .cd-half-block element (translateX(-100%) and translateX(100%) alternatively to :first-of-type and :nth-of-type(2)) so that they are moved outside the viewport.

    @media only screen and (min-width: 1170px) {
      .cd-section {
        height: 100vh;
      }
      .cd-block {
        position: fixed;
        top: 0;
        left: 0;
      }
      .cd-half-block {
        height: 100vh;
        width: 50%;
        position: absolute;
        top: 0;
      }
      .cd-section:nth-of-type(even) .cd-half-block:first-of-type, 
      .cd-section:nth-of-type(odd) .cd-half-block:nth-of-type(2) {
        left: 0;
        transform: translateX(-100%);
      }
      .cd-section:nth-of-type(odd) .cd-half-block:first-of-type, 
      .cd-section:nth-of-type(even) .cd-half-block:nth-of-type(2) {
        right: 0;
        transform: translateX(100%);
      }
    }
    
    Website preview with three columns of different color

    Events Handling

    Each section animation is basically made up of two phases: in the first one, the 2 .cd-half-block elements are moved back in the viewport (the translateX value varies from 100%/-100% to 0); in the second one the .cd-block is scaled down and its opacity is reduced (to simulate a 3D movement).

    To do so, we attached the triggerAnimation() function to the window scroll event. When the user scrolls, for each .cd-section element we evaluate – using the animateSection() function – the translateX and scale value according to the window scrollTop (and the section offset().top).

    $(window).on('scroll', function(){
    	triggerAnimation();
    });
     
    function triggerAnimation(){
    	if(MQ == 'desktop') {
    		//if on desktop screen - animate sections
    		window.requestAnimationFrame(animateSection);
    	} // .....
    }
     
    function animateSection () {
    	$('.cd-section').each(function(){
    		var actualBlock = $(this),
    			scale,
    			translate,
    			opacity;
     
    		//evaluate scale/translate values
    		//...
     
    		scaleBlock(actualBlock.find('.cd-block'), scale, opacity);
    		translateBlock(actualBlock.find('.cd-half-block').eq(0), '-'+translate);
    		translateBlock(actualBlock.find('.cd-half-block').eq(1), translate);	
    	});
    }
     
    function translateBlock(elem, value) {
    	elem.css({
    	 	//...
    		'transform': 'translateX(' + value + ')',
    	});
    }
     
    function scaleBlock(elem, value, opac) {
    	elem.css({
    	    //...
    		'transform': 'scale(' + value + ')',
    		'opacity': opac
    	});
    }
    Website preview with a car speed meter  and text on the right

    http://codyhouse.co/demo/3d-curtain-template

    Download

    Website preview with a small part of an image, black text on white background and two buttons with arrows
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