AI - Move directly toward player when nothing blocking

General
#1

I would like the AI to head straight for the player if no blocking objects in the nav mesh. I have got line casting working but am having problems setting the path. I tried the following from previous comments on another thread. SeachPath() in AIBase has been modified like so:

RecastGraph navmesh = (RecastGraph)AstarPath.active.data.FindGraphOfType(typeof(RecastGraph));
if (navmesh.Linecast(start, end))
{
seeker.StartPath(start, end);
}
else
{
//Fake a straight path to the target
straightLinePath = ABPath.Construct(start, end, null);
straightLinePath.vectorPath.Add(start);
straightLinePath.vectorPath.Add(end);
straightLinePath.CompleteState = PathCompleteState.Complete;
OnPathComplete(straightLinePath);
}

The AI simply stops when the path is not blocked. I have also tried adding the line: seeker.StartPath(straighLinePath) at the end. I then get errors about “path already processed” or “parameter index out of range”.

#2

Hi

Which movement script are you using? AIPath or RichAI?
Could you show me the whole modified method?

#3

I am using RichAI. I have tested the linecast functionality and that works fine. Just a few lines added to your method in AIBase:

public virtual void SearchPath()
{
if (float.IsPositiveInfinity(destination.x)) return;
if (onSearchPath != null) onSearchPath();

        lastRepath = Time.time;
        waitingForPathCalculation = true;

        seeker.CancelCurrentPathRequest();

        Vector3 start, end;
        CalculatePathRequestEndpoints(out start, out end);

        // Alternative way of requesting the path
        //ABPath p = ABPath.Construct(start, end, null);
        //seeker.StartPath(p);

        // This is where we should search to
        // Request a path to be calculated from our current position to the destination

        RecastGraph navmesh = (RecastGraph)AstarPath.active.data.FindGraphOfType(typeof(RecastGraph));
        if (navmesh != null)
        {
            if (navmesh.Linecast(start, end))
            {
                seeker.StartPath(start, end);
            }
            else
            {
                ////Fake a straight path to the target
                straightLinePath = ABPath.Construct(start, end, null);
                straightLinePath.vectorPath.Add(start);
                straightLinePath.vectorPath.Add(end);
                straightLinePath.CompleteState = PathCompleteState.Complete;
                OnPathComplete(straightLinePath);
                seeker.StartPath(straightLinePath);
            }
        }
        else
        {
            seeker.StartPath(start, end);
        }
    }