//creates a layer from the data passed in and adds it to the list
public void AddLayer(Texture2D picture, float depth, float moveRate)
{
BackgroundLayer layer = new BackgroundLayer();
layer.Image = picture;
//depth of 0 is closest, depth of 1 is furthest away
layer.Depth = depth;
//if moveRate is positive, it will move right or down
//if its negative, it will move left or up
layer.MoveRate = moveRate;
layer.ImageSize = new Vector2(picture.Width, picture.Height);
layerList.Add(layer);
}
//used to sort layers in Draw method
public int CompareDepth(BackgroundLayer layer1, BackgroundLayer layer2)
{
//depth of 0 is closest, depth of 1 is furthest away
if (layer1.Depth < layer2.Depth)
{
return(1);
}
if (layer1.Depth > layer2.Depth)
{
return(-1);
}
if (layer1.Depth == layer2.Depth)
{
return(0);
}
return(0);
}
