Drag sprite around a snap grid

 

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Useful for some game type scripts, this behaviour allows you to drap a sprite around the screen, but constrains it to a grid. Unlike a normal drag and snap using the standard behaviours, this behaviour only moves the sprite from grid location to grid location. There are some extras which allow you to specify which grid locations can be dropped onto or not. Also I'm using a 32pix by 32 pix grid but that can be changed. Any suggestions would be most appreciated - btw I know that the allowable gid locations don't work properly, if you can think of an idea that works, let me know.

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property drag property currmouse property spritenum property allowedx property allowedy property allowed property lastokx property lastoky property allowedxok property allowedyok on beginsprite      -- set up a default ok location, this can be changed as required   lastokx=sprite(spritenum).loch-sprite(spritenum).width/2   lastoky=sprite(spritenum).locv-sprite(spritenum).height/2      -- x and y grid positions which are dropable onto - doesn't work properly as at present can't identify specific grid locations, just areas.   set allowedx=[0,1,2,4]   set allowedy=[1,2] end on mouseup   if allowed=true then     drag=false     lastokx=sprite(spritenum).loch     lastoky=sprite(spritenum).locv   else     drag=false     sprite(spriteNum).loch=lastokx     sprite(spriteNum).locv=lastoky   end if end on mousedown   drag=true    end on exitframe      allowedxok=false   allowedyok=false   if drag=true then     put drag     set currmouse= the mouseloc          -- does the hard work. change the x and y multipliers as required for your grid, also change x and y to fit in with your stage size              repeat with x=0 to 19       repeat with y=0 to 19                      if inside(currmouse,rect(x*32,y*32,((x+1)*32),((y+1)*32))) then           repeat with s in allowedx             if x=s then               allowedxok=true             end if                        end repeat           repeat with s in allowedy             if y=s then               allowedyok=true             end if           end repeat           if allowedxok=true and allowedyok=true then             sprite(spriteNum).member = member(1)             allowed=true           else             sprite(spriteNum).member = member(2)             allowed=false           end if                      sprite(spriteNum).loch = x*32+sprite(spritenum).width/2           sprite(spriteNum).locv= y*32+sprite(spritenum).height/2                      updateStage         end if                end repeat            end repeat   end if      go the frame    end