Snap-to-grid using the Math remainder block

[Scott Ferguson]

> YouTube video <

This formula uses the Math remainder block to do snap-to-grid.

It may be a bit more efficient than the previous one which used the Math quotient block.

I also find that it is easier to understand how it works.

As the checker piece moves between the 40-pixel-wide grid squares the remainder of currentX / 40 will vary from 0 to 39.

Subtracting that from the currentX will give the snap-to-grid location for the checker piece x value.

The process is repeated for the checker piece y value

For example, given that:

- a particular square starts at x = 80

- and each square on the checkerboard is 40 pixels wide

- checker piece currentX = 85

then:

x = currentX - remainder(currentX / 40) 

x = 85 - remainder(85 / 40)

x = 85 - 5

x = 80