I'm working on creating a javascript version of the website that currently uses flash.
So far, I have completed the basic layout, which consists of a simple horizontal container with divs. You can view the code here http://pastebin.com/U3z2aJve
I am considering adding an event handler for mousemove, but I am unsure about how to calculate the container's left position in relation to the mouse's x position for the scrolling effect.
Can anyone provide guidance on the mathematical aspect of this?
To determine how far the mouse has moved across the screen in percentage, you will need to calculate the same percentage of the container's width and move the container accordingly.
For instance, if the screen is 100px wide and the container is 300px wide, every pixel the mouse moves from the left edge of the screen corresponds to moving the container 3 pixels to the left.
As a result, the container may end up completely off the left side of the screen, so adjustments need to made for the screen's width. The following pseudocode illustrates this concept:
var range = containerWidth - screenWidth; // 200px
// assuming the mouse is located 10px from the left
var dx = mousePercentageFromLeftEdgeOfScreen(); // dx = 0.1;
var movement = range * dx; // movement = 200 * 0.1 = 20px
// move the container to the left (negative value indicates leftward movement)
setContainerPosition(-movement);
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