Crowd members can break ranks and wander off outside the navmesh when the filter used doesn't have a proper exclude flag when clicking on another flagged geometry.

For example, a filter with include walk and exclude none.

Clicking on swim flagged pond will send them off onto their own paths.

Filter include walk and exclude swim will stop this behavior since it excludes the swim flag.

Need to try and figure out how to use these two methods.

RecastArea.java#L243-L377

I have successfully been able to mark triangles with the markBoxArea which uses AABB bounding box but the area type is removed once the navmesh is built.

This is the Recast version of these two methods.
Recast.h#L972-L993

This is where markConvexPolyArea is used in solo mesh builds.
RecastSoloMeshTest.java#L155

This is the loop to use:

// (Optional) Mark areas.
List<ConvexVolume> vols = geomProvider.getConvexVolumes(); 
for (ConvexVolume convexVolume: vols) { 
    RecastArea.markConvexPolyArea(m_ctx, convexVolume.verts, convexVolume.hmin, convexVolume.hmax, convexVolume.areaMod, m_chf);
}

I could only get markBoxArea to work if I used it prior to RecastArea.erodeWalkableArea at this point.
RecastSoloMeshTest.java#L151

One problem faced was that Piotr does not have ConvexVolumes working for SimpleInputGeomProvider.

SimpleInputGeomProvider.java#L83

To overcome this I just created my own convexVolumes list.

To use markBoxArea I created a custom object to hold the variables,

private class BoxArea {
    public float[] bmin; 
    public float[] bmax; 
    public AreaModification areaMod;

    public BoxArea(float[] bmin, float[] bmax, AreaModification areaMod) {
        this.bmin = bmin;
        this.bmax = bmax;
        this.areaMod = areaMod;
    }
        
}

used depthFirstTraversal on the geometry going into GeometryProviderBuilder and set the bmin, bmax, and areaMod.

For ConvexVolumes I used a similar technique except with ConvexVolume objects and used verts from the triangles returned in the TriMesh loop. I based the triangles lengths from each geometry gathered by the depthFirstTraversal triangle lengths.

RecastSoloMeshTest.java#L113

Add setting of area types to solo build for path filtering.

Descript says it all.

Need to add door connections to geometry in recast level through blender.

Either by adding a material or separating the transition into a separate object and adding user data.

java.lang.NullPointerException
	at org.recast4j.detour.DetourCommon.vCopy(DetourCommon.java:101)
	at org.recast4j.detour.crowd.Crowd.checkPathValidity(Crowd.java:826)
	at org.recast4j.detour.crowd.Crowd.update(Crowd.java:875)
	at com.jme3.recast4j.Detour.Crowd.Crowd.update(Crowd.java:84)
	at com.jme3.recast4j.Detour.Crowd.CrowdManager.lambda$update$0(CrowdManager.java:78)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
	at com.jme3.recast4j.Detour.Crowd.CrowdManager.update(CrowdManager.java:78)
	at com.jme3.recast4j.Detour.Crowd.Impl.CrowdManagerAppstate.update(CrowdManagerAppstate.java:48)
	at com.jme3.app.state.AppStateManager.update(AppStateManager.java:303)
	at com.jme3.app.SimpleApplication.update(SimpleApplication.java:253)
	at com.jme3.system.lwjgl.LwjglAbstractDisplay.runLoop(LwjglAbstractDisplay.java:151)
	at com.jme3.system.lwjgl.LwjglDisplay.runLoop(LwjglDisplay.java:197)
	at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:232)
	at java.lang.Thread.run(Thread.java:748)

is thrown when the fish try to swim outside of the pond

Edit: So this is something probably relevant to recast4j as the Crowd should try to fall back when a target is invalid. We could try to prevent illegal requestMoveToTargets on our side, but I'm not sure whether we can apply filters on our own. (targetPoly != 0 isn't enough here)

Maybe we could work around it by selecting the right filters here: https://github.com/MeFisto94/jme3-recast4j-demo/blob/master/src/main/java/com/jme3/recast4j/demo/states/tutorial/CrowdState.java#L383

On the other hand Crowd should now it's query filters, right?
Edit2: So I checked it, it has to be done in https://github.com/MeFisto94/jme3-recast4j/blob/master/src/main/java/com/jme3/recast4j/Detour/Crowd/Crowd.java#L243
But which of the n filters to pick? If I got that right I can have multiple filters at the same time? but which one is active?

Sooo one can use getFilter(i) from 0 to DT_CROWD_MAX_QUERY_FILTER_TYPE = 16, but I guess one can only use one filter at a time, so maybe there is an index which is the active filter.

Edit3: Crowd Uses m_filters[ag.params.queryFilterType]

Explain the differences for where and when to store agent parameters vs calculated parameters when building and saving mesh data.

Add path filtering.

As said in the title the End Waypoint Box is placed immediately usually, placed at the clicked target spot.
But it has to be placed where the last waypoint is or maybe we need yet another color for that, so that when Detour is falsely pícking another polygon which is connected, one sees where Jaime is navigating to instead of just having a line leading into nothing

Add offmesh connections to wiki.

Picking fails when inside the pond. Jaime will sometimes just continue until he walks off the edge. Most times he will just get stuck. Waypoint boxes fail to be placed for endpoint.

Might be due to picking not accounting for height and pond is below grade.

Add programmatically setting of off mesh connections.

Add tile building to setting of area types.

Add models that will demonstrate path filtering better. I have the models and am working on rigging and animating.

Add tile caching.

Add code to force path replan for all crowd/characters outside a predetermined radius when a door is closed to stop paths that are over a predetermined distance left to travel through the target door.

In situations where there is a hud/minimap the user could click a room a great distance away, generate a path to the room through a door and then someone else could close a door. Path needs to be replaned under those circumstances.

Add movement routines that will move the character to predetermined distance before triggering door open/close.

Complete the todo for path filtering once finished with adding.

If your agent gets set to

 CrowdAgentState       [DT_CROWDAGENT_STATE_INVALID]

which happens when there are no polygons under the agent, like when you set a filter to exclude WALK, and they are on WALK surface, there is no way to reset their CrowdAgentState except by adding to the crowd again....

Add code to move characters between offmesh connection targets.

Add animation triggering to offmesh connections.

What about adding a startup panel so we can switch more easily between navmesh builds, areas and filters. Seems to be needed at this point.

Add offmesh links to solo build methods after technique finalized.

Crowd fails to stop moving and form when reaching target in physics crowd.