GBLeadPlayerTo.java

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package com.fs.starfarer.api.impl.campaign.ghosts;
 
import org.lwjgl.util.vector.Vector2f;
 
import com.fs.starfarer.api.Global;
import com.fs.starfarer.api.campaign.CampaignFleetAPI;
import com.fs.starfarer.api.campaign.SectorEntityToken;
import com.fs.starfarer.api.util.Misc;
 
 
public class GBLeadPlayerTo extends BaseGhostBehavior {
    
    protected SectorEntityToken to;
    protected int maxBurn;
    protected float maxDistAhead;
    protected boolean returningToPlayer = false;
    
    public GBLeadPlayerTo(float duration, SectorEntityToken to, float maxDistAhead, int maxBurn) {
        super(duration);
        this.to = to;
        this.maxDistAhead = maxDistAhead;
        this.maxBurn = maxBurn;
    }
 
 
 
    @Override
    public void advance(float amount, SensorGhost ghost) {
        CampaignFleetAPI pf = Global.getSector().getPlayerFleet();
        if (pf.getContainingLocation() != ghost.getEntity().getContainingLocation() || !pf.isAlive()) {
            end();
            return;
        }
        super.advance(amount, ghost);
        
        
        float goBackThreshold = maxDistAhead * 2f;
        if (returningToPlayer) {
            goBackThreshold = maxDistAhead * 1.5f;
        }
        Vector2f dir = Misc.getUnitVector(pf.getLocation(), to.getLocation());
        Vector2f diff = Vector2f.sub(ghost.getEntity().getLocation(), pf.getLocation(), new Vector2f());
        
        float distAheadOfPlayer = Vector2f.dot(dir, diff);
        float distFromPlayer = Misc.getDistance(pf, ghost.getEntity());
        if (distFromPlayer >= goBackThreshold) {
            ghost.moveTo(pf.getLocation(), pf.getVelocity(), maxBurn);
            returningToPlayer = true;
        } else if (distAheadOfPlayer > maxDistAhead) {
            int burn = (int) (maxBurn * maxDistAhead / distAheadOfPlayer * 0.5f);
            ghost.moveTo(to.getLocation(), new Vector2f(), burn);
            returningToPlayer = false;
        } else {
            ghost.moveTo(to.getLocation(), new Vector2f(), maxBurn);
            returningToPlayer = false;
        }
        
        
        
        float dist = Misc.getDistance(ghost.getEntity(), to);
        if (dist < ghost.getEntity().getRadius() + to.getRadius()) {
            end();
            return;
        }
        
    }
    
    
    
}