user interface design by applying theories of aesthetics - Theseus

45
function enterframe(event:Event):void
{
if (targetX < leftBound)
{
threshold = (leftBound - targetX)/100;
leftOfBG = background.x - (background.width/2);
if (leftOfBG < leftEdgeOfStage)
{
background.x +=
threshold*bgSpeed;
}
}
if (targetX > rightBound)
{
threshold = Math.abs((rightBound - targetX)/100);
rightOfBG = background.x +
(background.width/2);
if (rightOfBG > rightEdgeOfStage)
{
background.x -= threshold*bgSpeed;
}
}
Figure 20: Source code of moving background