It first converts the sprite's direction from degrees to radians using the gToRad method. If the sprite is touching an edge, the code calculates the direction in which the sprite should bounce off. If the minimum distance (minDist) is greater than zero, it means the sprite is not touching any edge, so the function returns without performing any further action. If a smaller distance is found, it updates minDist and sets nearestEdge to the corresponding edge label ('left', ‘top’, ‘right’, or ‘bottom’). The code then compares each distance with the current minimum distance (minDist). The variable nearestEdge is initially an empty string, and minDist is set to positive infinity. It initializes the variables nearestEdge and minDist. Next, the code determines the nearest edge by comparing the distances calculated in the previous step. These distances are clamped to zero if the sprite is beyond the stage (i.e., the distances are negative). The distances are calculated for the left, top, right, and bottom edges and stored in variables distLeft, distTop, distRight, and distBottom, respectively. The distances are calculated based on the position of the sprite's bounding box relative to the stage edges. It retrieves the stage width and height from the object, which represents the Scratch runtime environment. The code then proceeds to calculate the distances between the sprite and the stage edges.

If the bounding box is not available, the function returns, as there is nothing to bounce off. The function starts by retrieving the bounding box (bounds) of the sprite using the getBounds method provided by util.target. util is an object that provides various utility methods and properties related to the execution environment. args is an object that may contain additional arguments passed to the function, although it is not used in this particular code.

Let's go through the code and understand its functionality step by step: The ifOnEdgeBounce function takes two parameters: args and util. IfOnEdgeBounce ( args, util ) Here is an explanation by ChatGPT because I'm too lazy to explain this to you.ĬhatGPT wrote: The provided JavaScript code represents the implementation of the “if on edge, bounce” behavior in Scratch.

Scratch bounce if touching edge