Cannot set obstacles/unwalkable path using grid.setWalkableAt

[hardyanto]

Hi, I am trying to set some obstacles on the grid by using grid.setWalkableAt. And I use raphaeljs to draw the path from the start to end point. However, it does not work and I don't receive any error. Can someone please tell me what is wrong with my code? Any help will be appreciated. Here is the zip file of my path finding project. hardy.zip

[mfandl]

you are first searching for the path on gridBackup, then setting non-walkable cells on grid. you need to set the non walkable cells in the first place and search for the path afterwards.

like this:

window.onload = function() {
  grid.setWalkableAt(3, 0, false);
  grid.setWalkableAt(5, 3, false);
  grid.setWalkableAt(5, 6, false);
  path = finder.findPath(0, 0, 10,0, grid);
  executeTask();
};

[Simus100]

hi, exactly at what point in time you can add non-walkable items in the code?.

[brean]

Hi @simus100 , the non-walkable is checked when the path-finding algorithm of your choice checks the neighbors of the node it is currently visiting (see here ). After creating the grid before you run the path-finding algorithm should be safe and the preferred method but also during the iteration over the grid is possible if you squeeze your code in the beginning of the getNeighbors-function.