DisintegratorEffect.java

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package com.fs.starfarer.api.impl.combat;
 
import java.awt.Color;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.List;
 
import org.lwjgl.opengl.GL14;
import org.lwjgl.util.vector.Vector2f;
 
import com.fs.starfarer.api.Global;
import com.fs.starfarer.api.combat.ArmorGridAPI;
import com.fs.starfarer.api.combat.BaseCombatLayeredRenderingPlugin;
import com.fs.starfarer.api.combat.CombatEngineAPI;
import com.fs.starfarer.api.combat.CombatEngineLayers;
import com.fs.starfarer.api.combat.CombatEntityAPI;
import com.fs.starfarer.api.combat.DamagingProjectileAPI;
import com.fs.starfarer.api.combat.OnHitEffectPlugin;
import com.fs.starfarer.api.combat.ShipAPI;
import com.fs.starfarer.api.combat.ViewportAPI;
import com.fs.starfarer.api.combat.listeners.ApplyDamageResultAPI;
import com.fs.starfarer.api.graphics.SpriteAPI;
import com.fs.starfarer.api.util.FaderUtil;
import com.fs.starfarer.api.util.IntervalUtil;
import com.fs.starfarer.api.util.Misc;
 
public class DisintegratorEffect extends BaseCombatLayeredRenderingPlugin implements OnHitEffectPlugin {
 
    // each tick is on average .9 seconds
    // ticks can't be longer than a second or floating damage numbers separate
    public static int NUM_TICKS = 22;
    public static float TOTAL_DAMAGE = 500;
    
    public DisintegratorEffect() {
    }
    
    public void onHit(DamagingProjectileAPI projectile, CombatEntityAPI target, Vector2f point, boolean shieldHit, ApplyDamageResultAPI damageResult, CombatEngineAPI engine) {
        if (shieldHit) return;
        if (projectile.isFading()) return;
        if (!(target instanceof ShipAPI)) return;
        
        Vector2f offset = Vector2f.sub(point, target.getLocation(), new Vector2f());
        offset = Misc.rotateAroundOrigin(offset, -target.getFacing());
        
        DisintegratorEffect effect = new DisintegratorEffect(projectile, (ShipAPI) target, offset);
        CombatEntityAPI e = engine.addLayeredRenderingPlugin(effect);
        e.getLocation().set(projectile.getLocation());
    }
    
    public static class ParticleData {
        public SpriteAPI sprite;
        public Vector2f offset = new Vector2f();
        public Vector2f vel = new Vector2f();
        public float scale = 1f;
        public float scaleIncreaseRate = 1f;
        public float turnDir = 1f;
        public float angle = 1f;
        
        public float maxDur;
        public FaderUtil fader;
        public float elapsed = 0f;
        public float baseSize;
        
        public ParticleData(float baseSize, float maxDur, float endSizeMult) {
            sprite = Global.getSettings().getSprite("misc", "nebula_particles");
            //sprite = Global.getSettings().getSprite("misc", "dust_particles");
            float i = Misc.random.nextInt(4);
            float j = Misc.random.nextInt(4);
            sprite.setTexWidth(0.25f);
            sprite.setTexHeight(0.25f);
            sprite.setTexX(i * 0.25f);
            sprite.setTexY(j * 0.25f);
            sprite.setAdditiveBlend();
            
            angle = (float) Math.random() * 360f;
            
            this.maxDur = maxDur;
            scaleIncreaseRate = endSizeMult / maxDur;
            if (endSizeMult < 1f) {
                scaleIncreaseRate = -1f * endSizeMult;
            }
            scale = 1f;
            
            this.baseSize = baseSize;
            turnDir = Math.signum((float) Math.random() - 0.5f) * 20f * (float) Math.random();
            //turnDir = 0f;
            
            float driftDir = (float) Math.random() * 360f;
            vel = Misc.getUnitVectorAtDegreeAngle(driftDir);
            //vel.scale(proj.getProjectileSpec().getLength() / maxDur * (0f + (float) Math.random() * 3f));
            vel.scale(0.25f * baseSize / maxDur * (1f + (float) Math.random() * 1f));
            
            fader = new FaderUtil(0f, 0.5f, 0.5f);
            fader.forceOut();
            fader.fadeIn();
        }
        
        public void advance(float amount) {
            scale += scaleIncreaseRate * amount;
            
            offset.x += vel.x * amount;
            offset.y += vel.y * amount;
                
            angle += turnDir * amount;
            
            elapsed += amount;
            if (maxDur - elapsed <= fader.getDurationOut() + 0.1f) {
                fader.fadeOut();
            }
            fader.advance(amount);
        }
    }
    
    protected List<ParticleData> particles = new ArrayList<ParticleData>();
    protected DamagingProjectileAPI proj;
    protected ShipAPI target;
    protected Vector2f offset;
    protected int ticks = 0;
    protected IntervalUtil interval; 
    protected FaderUtil fader = new FaderUtil(1f, 0.5f, 0.5f); 
 
    public DisintegratorEffect(DamagingProjectileAPI proj, ShipAPI target, Vector2f offset) {
        this.proj = proj;
        this.target = target;
        this.offset = offset;
        
        interval = new IntervalUtil(0.8f, 1f);
        interval.forceIntervalElapsed();
    }
    
    public float getRenderRadius() {
        return 500f;
    }
    
    
    protected EnumSet<CombatEngineLayers> layers = EnumSet.of(CombatEngineLayers.BELOW_INDICATORS_LAYER);
    @Override
    public EnumSet<CombatEngineLayers> getActiveLayers() {
        return layers;
    }
 
    public void init(CombatEntityAPI entity) {
        super.init(entity);
    }
    
    public void advance(float amount) {
        if (Global.getCombatEngine().isPaused()) return;
        
        Vector2f loc = new Vector2f(offset);
        loc = Misc.rotateAroundOrigin(loc, target.getFacing());
        Vector2f.add(target.getLocation(), loc, loc);
        entity.getLocation().set(loc);
        
        List<ParticleData> remove = new ArrayList<ParticleData>();
        for (ParticleData p : particles) {
            p.advance(amount);
            if (p.elapsed >= p.maxDur) {
                remove.add(p);
            }
        }
        particles.removeAll(remove);
        
        float volume = 1f;
        if (ticks >= NUM_TICKS || !target.isAlive() || !Global.getCombatEngine().isEntityInPlay(target)) {
            fader.fadeOut();
            fader.advance(amount);
            volume = fader.getBrightness();
        }
        Global.getSoundPlayer().playLoop("disintegrator_loop", target, 1f, volume, loc, target.getVelocity());
        
        
        interval.advance(amount);
        if (interval.intervalElapsed() && ticks < NUM_TICKS) {
            dealDamage();
            ticks++;
        }
    }
 
 
    protected void dealDamage() {
        CombatEngineAPI engine = Global.getCombatEngine();
        
        int num = 3;
        for (int i = 0; i < num; i++) {
            ParticleData p = new ParticleData(30f, 3f + (float) Math.random() * 2f, 2f);
            particles.add(p);
            p.offset = Misc.getPointWithinRadius(p.offset, 20f);
        }
        
        
        Vector2f point = new Vector2f(entity.getLocation());
        
        // maximum armor in a cell is 1/15th of the ship's stated armor rating
 
        ArmorGridAPI grid = target.getArmorGrid();
        int[] cell = grid.getCellAtLocation(point);
        if (cell == null) return;
        
        int gridWidth = grid.getGrid().length;
        int gridHeight = grid.getGrid()[0].length;
        
        float damageTypeMult = getDamageTypeMult(proj.getSource(), target);
        
        float damagePerTick = (float) TOTAL_DAMAGE / (float) NUM_TICKS;
        float damageDealt = 0f;
        for (int i = -2; i <= 2; i++) {
            for (int j = -2; j <= 2; j++) {
                if ((i == 2 || i == -2) && (j == 2 || j == -2)) continue; // skip corners
                
                int cx = cell[0] + i;
                int cy = cell[1] + j;
                
                if (cx < 0 || cx >= gridWidth || cy < 0 || cy >= gridHeight) continue;
                
                float damMult = 1/30f;
                if (i == 0 && j == 0) {
                    damMult = 1/15f;
                } else if (i <= 1 && i >= -1 && j <= 1 && j >= -1) { // S hits
                    damMult = 1/15f;
                } else { // T hits
                    damMult = 1/30f;
                }
                
                float armorInCell = grid.getArmorValue(cx, cy);
                float damage = damagePerTick * damMult * damageTypeMult;
                damage = Math.min(damage, armorInCell);
                if (damage <= 0) continue;
                
                target.getArmorGrid().setArmorValue(cx, cy, Math.max(0, armorInCell - damage));
                damageDealt += damage;
            }
        }
        
        if (damageDealt > 0) {
            if (Misc.shouldShowDamageFloaty(proj.getSource(), target)) {
                engine.addFloatingDamageText(point, damageDealt, Misc.FLOATY_ARMOR_DAMAGE_COLOR, target, proj.getSource());
            }
            target.syncWithArmorGridState();
        }
        
    }
 
    public boolean isExpired() {
        return particles.isEmpty() && 
                    (ticks >= NUM_TICKS || !target.isAlive() || !Global.getCombatEngine().isEntityInPlay(target));
    }
 
    public void render(CombatEngineLayers layer, ViewportAPI viewport) {
        float x = entity.getLocation().x;
        float y = entity.getLocation().y;
        
        Color color = new Color(100,150,255,35);
        float b = viewport.getAlphaMult();
 
        GL14.glBlendEquation(GL14.GL_FUNC_REVERSE_SUBTRACT);
        
        for (ParticleData p : particles) {
            //float size = proj.getProjectileSpec().getWidth() * 0.6f;
            float size = p.baseSize * p.scale;
            
            Vector2f loc = new Vector2f(x + p.offset.x, y + p.offset.y);
            
            float alphaMult = 1f;
            
            p.sprite.setAngle(p.angle);
            p.sprite.setSize(size, size);
            p.sprite.setAlphaMult(b * alphaMult * p.fader.getBrightness());
            p.sprite.setColor(color);
            p.sprite.renderAtCenter(loc.x, loc.y);
        }
        
        GL14.glBlendEquation(GL14.GL_FUNC_ADD);
    }
    
    
    public static float getDamageTypeMult(ShipAPI source, ShipAPI target) {
        if (source == null || target == null) return 1f;
        
        float damageTypeMult = target.getMutableStats().getArmorDamageTakenMult().getModifiedValue();
        switch (target.getHullSize()) {
        case CAPITAL_SHIP:
            damageTypeMult *= source.getMutableStats().getDamageToCapital().getModifiedValue();
            break;
        case CRUISER:
            damageTypeMult *= source.getMutableStats().getDamageToCruisers().getModifiedValue();
            break;
        case DESTROYER:
            damageTypeMult *= source.getMutableStats().getDamageToDestroyers().getModifiedValue();
            break;
        case FRIGATE:
            damageTypeMult *= source.getMutableStats().getDamageToFrigates().getModifiedValue();
            break;
        case FIGHTER:
            damageTypeMult *= source.getMutableStats().getDamageToFighters().getModifiedValue();
            break;
        }
        return damageTypeMult;
    }
 
}