Building a Board Game

[Devin Asay]

Roger,

Rather than moving an object, think about using button icons.  This is the basic process:

- on mouseDown: check the icon of the target, set the icon of a hidden, moving button to the same icon, set the icon of the target to 0, set a flag—isDragging--to true, show the hidden button

- on mouseMove: if isDragging is true, set the loc of the moving button to the mouseLoc

- on mouseUp: figure out which square you’re over, set the icon of that button to the icon of the moving button, hide moving button, set isDragging to false.

I made a rudimentary chess game that uses this technique, check it out here:

http://dight310.byu.edu/lesson_materials/07-arrays/chessGame-final-key.livecode

Click the Clear Board and Setup Game buttons first to set up the game board array. Game state handlers are in the card script; game piece moving handlers are in the game board group script.

Hope this helps.

Devin


On Apr 7, 2020, at 1:24 PM, Roger Guay via use-livecode <use-livecode at lists.runrev.com<mailto:use-livecode at lists.runrev.com>> wrote:

Hi all,

I know there must be a simple way to do this but it is escaping me at the moment. How can I move an object (grab me on mouseDown) and have it snap to a grid (square on a board game) on mouseUp?

Thanks much,

Roger
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Devin Asay
Director
Office of Digital Humanities
Brigham Young University