RiftBeamEffect.java

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package com.fs.starfarer.api.impl.combat;
 
import java.util.Iterator;
import java.util.List;
 
import org.lwjgl.util.vector.Vector2f;
 
import com.fs.starfarer.api.Global;
import com.fs.starfarer.api.combat.BeamAPI;
import com.fs.starfarer.api.combat.CombatEngineAPI;
import com.fs.starfarer.api.combat.CombatEntityAPI;
import com.fs.starfarer.api.combat.EveryFrameWeaponEffectPlugin;
import com.fs.starfarer.api.combat.MissileAPI;
import com.fs.starfarer.api.combat.ShipAPI;
import com.fs.starfarer.api.combat.WeaponAPI;
import com.fs.starfarer.api.combat.WeaponAPI.WeaponType;
import com.fs.starfarer.api.util.IntervalUtil;
import com.fs.starfarer.api.util.Misc;
import com.fs.starfarer.api.util.WeightedRandomPicker;
 
public class RiftBeamEffect implements EveryFrameWeaponEffectPlugin {
 
    public static float TARGET_RANGE = 100f;
    public static float RIFT_RANGE = 50f;
    
    protected IntervalUtil interval = new IntervalUtil(0.8f, 1.2f);
    
    public RiftBeamEffect() {
        interval.setElapsed((float) Math.random() * interval.getIntervalDuration());
    }
    
    //public void advance(float amount, CombatEngineAPI engine, BeamAPI beam) {
    public void advance(float amount, CombatEngineAPI engine, WeaponAPI weapon) {
        List<BeamAPI> beams = weapon.getBeams();
        if (beams.isEmpty()) return;
        BeamAPI beam = beams.get(0);
        if (beam.getBrightness() < 1f) return;
    
        interval.advance(amount * 2f);
        if (interval.intervalElapsed()) {
            if (beam.getLengthPrevFrame() < 10) return;
            
            Vector2f loc;
            CombatEntityAPI target = findTarget(beam, beam.getWeapon(), engine);
            if (target == null) {
                loc = pickNoTargetDest(beam, beam.getWeapon(), engine);
            } else {
                loc = target.getLocation();
            }
            
            Vector2f from = Misc.closestPointOnSegmentToPoint(beam.getFrom(), beam.getRayEndPrevFrame(), loc);
            Vector2f to = Misc.getUnitVectorAtDegreeAngle(Misc.getAngleInDegrees(from, loc));
            //to.scale(Math.max(RIFT_RANGE * 0.5f, Math.min(Misc.getDistance(from, loc), RIFT_RANGE)));
            to.scale(Math.min(Misc.getDistance(from, loc), RIFT_RANGE));
            Vector2f.add(from, to, to);
            
            spawnMine(beam.getSource(), to);
//          float thickness = beam.getWidth();
//          EmpArcEntityAPI arc = engine.spawnEmpArcVisual(from, null, to, null, thickness, beam.getFringeColor(), Color.white);
//          arc.setCoreWidthOverride(Math.max(20f, thickness * 0.67f));
            //Global.getSoundPlayer().playSound("tachyon_lance_emp_impact", 1f, 1f, arc.getLocation(), arc.getVelocity());
        }
    }
    
    public void spawnMine(ShipAPI source, Vector2f mineLoc) {
        CombatEngineAPI engine = Global.getCombatEngine();
        
        
        //Vector2f currLoc = mineLoc;
        MissileAPI mine = (MissileAPI) engine.spawnProjectile(source, null, 
                                                              "riftbeam_minelayer", 
                                                              mineLoc, 
                                                              (float) Math.random() * 360f, null);
        if (source != null) {
            Global.getCombatEngine().applyDamageModifiersToSpawnedProjectileWithNullWeapon(
                                            source, WeaponType.ENERGY, false, mine.getDamage());
        }
        
        
        float fadeInTime = 0.05f;
        mine.getVelocity().scale(0);
        mine.fadeOutThenIn(fadeInTime);
        
        float liveTime = 0f;
        //liveTime = 0.01f;
        mine.setFlightTime(mine.getMaxFlightTime() - liveTime);
        mine.addDamagedAlready(source);
        mine.setNoMineFFConcerns(true);
    }
 
    public Vector2f pickNoTargetDest(BeamAPI beam, WeaponAPI weapon, CombatEngineAPI engine) {
        Vector2f from = beam.getFrom();
        Vector2f to = beam.getRayEndPrevFrame();
        float length = beam.getLengthPrevFrame();
        
        float f = 0.25f + (float) Math.random() * 0.75f;
        Vector2f loc = Misc.getUnitVectorAtDegreeAngle(Misc.getAngleInDegrees(from, to));
        loc.scale(length * f);
        Vector2f.add(from, loc, loc);
        
        return Misc.getPointWithinRadius(loc, RIFT_RANGE);
    }
    
    public CombatEntityAPI findTarget(BeamAPI beam, WeaponAPI weapon, CombatEngineAPI engine) {
        Vector2f to = beam.getRayEndPrevFrame();
        
        Iterator<Object> iter = Global.getCombatEngine().getAllObjectGrid().getCheckIterator(to,
                                                                            RIFT_RANGE * 2f, RIFT_RANGE * 2f);
        int owner = weapon.getShip().getOwner();
        WeightedRandomPicker<CombatEntityAPI> picker = new WeightedRandomPicker<CombatEntityAPI>();
        while (iter.hasNext()) {
            Object o = iter.next();
            if (!(o instanceof MissileAPI) &&
                    !(o instanceof ShipAPI)) continue;
            CombatEntityAPI other = (CombatEntityAPI) o;
            if (other.getOwner() == owner) continue;
            if (other instanceof ShipAPI) {
                ShipAPI ship = (ShipAPI) other;
                if (!ship.isFighter() && !ship.isDrone()) continue;
            }
            
            float radius = Misc.getTargetingRadius(to, other, false);
            Vector2f p = Misc.closestPointOnSegmentToPoint(beam.getFrom(), beam.getRayEndPrevFrame(), other.getLocation());
            float dist = Misc.getDistance(p, other.getLocation()) - radius;
            if (dist > TARGET_RANGE) continue;
            
            picker.add(other);
            
        }
        return picker.pick();
    }
 
}