org.destinationsol.game.ship.KnockBack.java Source code

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Here is the source code for org.destinationsol.game.ship.KnockBack.java

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/*
 * Copyright 2015 MovingBlocks
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.destinationsol.game.ship;

import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.utils.JsonValue;
import org.destinationsol.common.SolMath;
import org.destinationsol.game.AbilityCommonConfig;
import org.destinationsol.game.SolGame;
import org.destinationsol.game.SolObject;
import org.destinationsol.game.dra.DraLevel;
import org.destinationsol.game.item.ItemManager;
import org.destinationsol.game.item.SolItem;
import org.destinationsol.game.particle.ParticleSrc;

public class KnockBack implements ShipAbility {
    public static final int MAX_RADIUS = 8;
    private final Config myConfig;

    public KnockBack(Config config) {
        myConfig = config;
    }

    @Override
    public AbilityConfig getConfig() {
        return myConfig;
    }

    @Override
    public AbilityCommonConfig getCommonConfig() {
        return myConfig.cc;
    }

    @Override
    public float getRadius() {
        return MAX_RADIUS;
    }

    @Override
    public boolean update(SolGame game, SolShip owner, boolean tryToUse) {
        if (!tryToUse)
            return false;
        Vector2 ownerPos = owner.getPosition();
        for (SolObject o : game.getObjMan().getObjs()) {
            if (o == owner || !o.receivesGravity())
                continue;
            Vector2 oPos = o.getPosition();
            float dst = oPos.dst(ownerPos);
            if (dst == 0)
                continue; // O__o
            float perc = getPerc(dst, MAX_RADIUS);
            if (perc <= 0)
                continue;
            Vector2 toO = SolMath.distVec(ownerPos, oPos);
            float accLen = myConfig.force * perc;
            toO.scl(accLen / dst);
            o.receiveForce(toO, game, false);
            SolMath.free(toO);
        }
        ParticleSrc src = new ParticleSrc(myConfig.cc.effect, MAX_RADIUS, DraLevel.PART_BG_0, new Vector2(), true,
                game, ownerPos, Vector2.Zero, 0);
        game.getPartMan().finish(game, src, ownerPos);
        return true;
    }

    public static float getPerc(float dst, float radius) {
        if (radius < dst)
            return 0;
        float rHalf = radius / 2;
        if (dst < rHalf)
            return 1;
        return 1 - (dst - rHalf) / rHalf;
    }

    public static class Config implements AbilityConfig {
        public final float rechargeTime;
        private final SolItem chargeExample;
        public final float force;
        public final AbilityCommonConfig cc;

        public Config(float rechargeTime, SolItem chargeExample, float force, AbilityCommonConfig cc) {
            this.rechargeTime = rechargeTime;
            this.chargeExample = chargeExample;
            this.force = force;
            this.cc = cc;
        }

        @Override
        public ShipAbility build() {
            return new KnockBack(this);
        }

        @Override
        public SolItem getChargeExample() {
            return chargeExample;
        }

        @Override
        public float getRechargeTime() {
            return rechargeTime;
        }

        @Override
        public void appendDesc(StringBuilder sb) {
            sb.append("?\n");
        }

        public static AbilityConfig load(JsonValue abNode, ItemManager itemManager, AbilityCommonConfig cc) {
            float rechargeTime = abNode.getFloat("rechargeTime");
            float force = abNode.getFloat("force");
            SolItem chargeExample = itemManager.getExample("knockBackCharge");
            return new Config(rechargeTime, chargeExample, force, cc);
        }
    }
}