It's pretty simple to use the Parallax, first we shall create an object from its class.

Parallax p = new Parallax();

After that, the “backgrounds” will be added.

p.add(“fundo4.png”);
p.add(“fundo3.png”);
p.add(“fundo2.png”);
p.add(“fundo.png”);

Note: The first "backgrounds" to be inserted will be the last layers of the plan.

1 - Adjusting Speed

There are three methods in this class in charge of adjusting the speed of the plans: setVelAllLayers, setVelAllLayersStandard e setVelLayer.

setVelAllLayers(double velMainLayerX, double velMainLayerY)
// Adjusts the speed of all layers from the main layer.
// It divides the speed of the following layers by 2.
setVelAllLayersStandard()
// Adjusts the speed of all layers from the main layer

setVelLayer(double velX, double velY,ParallaxLayers bg)
// Assigns velX and VelY to the layer passed as parameter

2 - Other methods

drawLayers()
//Draw all the layers.

repeatLayers(int windowWidth,int windowHeigth, boolean axisX)
// Makes the whole layer return to its initial position as soon as it reached its final position. If Boolean
// axisX is true, the layers from the X axis are repeated, otherwise, the layers from the Y axis are repeated.

moveLayersStandardX(boolean left)
// moves all the layers to the left if true, otherwise moves them to the right.

moveLayersStandardY(boolean up)
// move all the layers up to the true case, otherwise moves them down.

setMainLayer(ParallaxLayers layer)
// sets the main layer

getMainLayer()
// returns the main layer

setVelMainLayer(double x,double y)
// assings the speed the main layer, velX and velY.

setVelLayerX(double velX,ParallaxLayers bg )
// sets the speed of the layer in the X axis

setVelLayerY(double velY,ParallaxLayers bg )
// sets the speed of the layer in the Y axis

public void setVelAllLayers()
// Assigns the value of the speed for all the layers.
// Note: If you use this method, the method setVelMainLayer (double x, double y) must be called before,
// otherwise all the layers will have 0 as value.