Pathfinding and Cost

General Grid graph
#1

Hi,
I am using GraphGrid on terrain. I would add a cost into pathfinding related to terrain height… is it possibile out of box ?

#2

Hi

Yes that is possible in the pro version.
Take a look at Grid Graph Settings -> Advanced -> Penalty Modifications -> Position Penalty.
You can also apply penalty based on a texture.

#3

Excellent … I am gonna by the pro version …
One more question … can I create my grid from runtime … I mean without have it in a object in edit. I see that you can update in runtime, but for some specific need I have even to create
Thanks

#4

I’m not quite sure what you mean, but for grid graphs anything that can be done in the editor can be done during runtime as well.

#5

Ok… so it shoudl work.
I mean declare and instanciate the class from C#, without having the object in edit mode into inspector

#6

Yes, you can create graphs from scripts.
You can do something like this

     var graph = AstarPath.active.astarData.AddGraph(typeof(GridGraph)) as GridGraph;
     graph.width = 10;
     graph.depth = 10;
     graph.center = Vector3.zero;
     graph.UpdateSizeFromWidthDepth();
     AstarPath.active.Scan();
#7

yes… thanks a lot for your prompt reply

#8

It works really smoothly …and perfomance are nice …
How can I activate “Show Graph” … I want to show the grid in the scene during the game ( only for my debug )

#9

Hi

Nice!
‘Show Graphs’ is implemented using Unity gizmos (https://docs.unity3d.com/ScriptReference/Gizmos.html) you can enable it in the game view by clicking the ‘Gizmos’ button in the top right corner of the view, however note that this will not show up in a standalone build, it will only show up in the editor.

#10

Yes … I know that … but my problem is that when I create the grid from the scrip ( var graph = AstarPath.active.astarData.AddGraph(typeof(GridGraph)) as GridGraph; ) I cannot get how enable “ShowGraph”
I figure out other parameters to setup the grid, but not that one :flushed:

#11

Ah. You can use

AstarPath.showNavGraphs = true;
#12

Ok … thanks…
one more question …
I have in my requirement the capabilty to calculate the path between two points and show the result
from edit mode. I mean without playing, usign a custom inspector

How can I call the pathfidning in edit mode ? Is there any example ?

#13

Hi

Sorry, pathfinding is currently not possible in edit mode.
Is it not possible to do this in play mode instead?

#14

Hi,
that’s requirement is really on the top of list.
I am opent to work on that, if you think that is something doable changing or creating new class.
Thanks

Antonio

#15

Hi

You can try to call

var as = GetComponent<AstarPath>();
as.Awake();
// Run pathfinding calls here

but I cannot guarantee that it will work well. You might have to remove some if(Application.isPlaying) checks inside that method to get it to work.

#16

Hi Aron,
grid creation by code and scan works from edit. I followed your input ( even few Application.isPaying() to comment )
Now I cannot get any result from pathfinding. I am following the example with the class WaypointPath. But I am not getting any path.

#17

You might have to call AstarPath.Update (potentially several times) or you might have to use AstarPath.WaitForPath to force the paths to be calculated immediately.