June 17, 2013

The Bond, James Bond effect

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007 effect

tl;dr? James Bond Effect and look at the github repo

Hi again, catching title right? After seeing the @ebidel Google I/O 13 talk about the awesome web coming, I really liked a 007's effect he did on stage and I wanted to give it a try and add a little of spice to it. Lets see:

The effect has 2 parts, the "aim" which is done with the clip css property, and for part 2 of the post, the shot effect, with canvas.

First the setup, in my case hbp5. I removed jQuery because I didn't need it. Then I found a nice 007 image of the famous gun barrel scene to apply the effect.

AIM

As I said, the aim effect is done with the clip css property. I used ebidel gist with the effect, I copy the adaptation of the script here:

(function() {
    "use strict";

    var background = document.getElementById("background"),
        titleHeight = 40; //h1#title height

    var radius = 120; // px

    function move(x, y) {
        // CSS clip path - http://dvcs.w3.org/hg/FXTF/raw-file/tip/masking/index.html#the-clip-path
        background.style.webkitClipPath = 'circle('+x+'px, '+y+'px, '+radius+'px)';
        background.style.mozClipPath = 'circle('+x+'px, '+y+'px, '+radius+'px)';
        background.style.msClipPath = 'circle('+x+'px, '+y+'px, '+radius+'px)';
        background.style.oClipPath = 'circle('+x+'px, '+y+'px, '+radius+'px)';
        background.style.clipPath = 'circle('+x+'px, '+y+'px, '+radius+'px)';
    }

    window.addEventListener('mousemove', function(e) {
        move(e.pageX, e.pageY - titleHeight); // - titleHeight because the listener is the window and we want the coordinates relative to the backgound which is 40px down.
    });

    // Holding down SHIFT and scrolling grows/shrinks the circle.
    window.addEventListener('mousewheel', function(e) {
        if (!e.shiftKey) {
            return;
        }

        e.preventDefault(); // Prevent scrolling.

        var deltaY = e.wheelDeltaY;
        radius += -deltaY;
        if (deltaY > 0) { // up / shrink
            radius = Math.max(90, radius);
        } else {
            radius = Math.min(radius, window.innerHeight / 2);
        }
        move(e.pageX, e.pageY);
    });
})();

SHOOT

The shoot animation I will leave it to the 2nd part of the post, because I don't know how to do it yet :p

Any suggestions? Please comment!
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