This function can be used to add a given value (real or string) to all the values of the cells found within the defined disk area of a grid. The value to be added must be of the same type as that held within the grid cells, ie: you cannot add a string to a real or vice-versa, and for strings this corresponds to concatenation.
ds_grid_add_disk(index, xm, ym, r, val);
|index||The index of the grid.|
|xm||The x position of the disk on the grid.|
|ym||The y position of the disk on the grid.|
|r||The radius of the disk on the grid.|
|val||The value to add to the cells within the disk.|
ds_grid_add_disk(grid, 7, 6, 5, 2)
This would add 2 to all the values held in the cells within the defined disk area of the ds_grid referenced by the variable "grid".