/**
* Get the layer referenced by the supplied layer ID.
*
* @param layerID the id of the layer to retrieve.
* @return the requested layer, or null if requested layer does not exist.
*/
public Layer getLayer(String layerID) {
for (Layer layer : layers) {
if (layer.getLayerID().equals(layerID)) {
return layer;
}
}
return null;
}
/**
* Add a component to the layer referred by the supplied ID parameter. Ideally a single component
* should only be associated with a single layer.
*
* @param layerID the ID of the layer to add the component to.
* @param entity the component to add to the supplied layer.
*/
public void addToLayer(String layerID, GameEntity entity) {
Layer layer = getLayer(layerID);
if (layer == null) {
layer = new Layer(layerID, layers.size());
layers.add(layer);
}
layer.addEntity(entity);
}
/**
* Render all components on a layer by layer basis.
*
* @param delta the time delta since the last render operation.
*/
public void render(Camera camera, float delta) {
spriteBatch.setProjectionMatrix(camera.combined);
Gdx.gl.glClearColor(1f, 1f, 1.0f, 1.0f);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
for (Layer layer : layers) {
layer.sortLayers();
spriteBatch.begin();
for (GameEntity entity : layer.getEntities()) {
entity.render(spriteBatch, delta);
}
spriteBatch.end();
}
}