This function can be used to set the scale along the y-axis of a background element. You give the background element ID (which you get when you create a background element using layer_background_create() or when you use the function layer_background_get_id()), and then set the scale value. The scale value you give is a multiplier that will be used to change the way the background element is displayed, where a value of 0.5 would display the element at half scale, and a value of 2 would display at double scale. Note that negative values are valid, and will "flip" the element around the (0,0) position, so an x scale of -1 would show the image reversed.
layer_background_yscale(background_element_id, yscale);
| Argument | Type | Description |
|---|---|---|
| background_element_id | Background Element ID | The unique ID value of the background element to change |
| yscale | Real | The speed multiplier/value to use for the element |
N/A
var lay_id = layer_get_id("Background_water");
var back_id = layer_background_get_id(lay_id);
layer_background_yscale(back_id, -1);
The above code will get the layer ID for the layer named "Background_water" and then use that to get the ID of the background element on that layer. This ID is then used to change the element yscale.