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‎.editorconfig

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# Editor configuration, see http://editorconfig.org
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root = true
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[*]
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charset = utf-8
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indent_style = space
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indent_size = 2
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insert_final_newline = true
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trim_trailing_whitespace = true
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max_line_length = 80
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[*.sh]
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end_of_line = lf
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[*.java]
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indent_size = 4
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max_line_length = 120

‎.gitignore

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target

‎.vscode/settings.json

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{
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"java.configuration.updateBuildConfiguration": "automatic",
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"yaml.schemas": {
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"https://json.schemastore.org/bukkit-plugin.json": "file:///c%3A/Users/alexa/Desktop/spigotplugin/demo/demo/src/main/resources/plugin.yml"
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}
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}

‎TODO

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Fix Lingering potions giving the effect no matter what
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Maybe find a way to prevent potion particles

‎pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>xyz.combot</groupId>
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<artifactId>Bounceable</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<junit.version>5.6.0</junit.version>
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<maven-enforcer-plugin.version>3.0.0-M3</maven-enforcer-plugin.version>
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<maven-surefire-plugin.version>3.0.0-M5</maven-surefire-plugin.version>
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<maven-javadoc-plugin.version>3.0.0</maven-javadoc-plugin.version>
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</properties>
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<repositories>
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<repository>
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<id>spigot-repo</id>
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<url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
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</repository>
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</repositories>
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<dependencies>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-api</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.spigotmc</groupId>
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<artifactId>spigot-api</artifactId>
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<version>1.18.2-R0.1-SNAPSHOT</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-enforcer-plugin</artifactId>
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<version>${maven-enforcer-plugin.version}</version>
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<executions>
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<execution>
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<goals>
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<goal>enforce</goal>
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</goals>
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<configuration>
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<rules>
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<requireMavenVersion>
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<version>3.6.3</version>
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</requireMavenVersion>
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</rules>
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<fail>true</fail>
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</configuration>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>${maven-surefire-plugin.version}</version>
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</plugin>
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</plugins>
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</build>
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<reporting>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-javadoc-plugin</artifactId>
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<version>${maven-javadoc-plugin.version}</version>
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</plugin>
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</plugins>
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</reporting>
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</project>

‎src/main/java/xyz/combot/App.java

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package xyz.combot;
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import org.bukkit.plugin.java.JavaPlugin;
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import xyz.combot.events.ThrowableHitSurface;
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public class App extends JavaPlugin {
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public static String PluginName = "Bounceable";
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@Override
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public void onEnable() {
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getServer().getPluginManager().registerEvents(new ThrowableHitSurface(), this);
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saveDefaultConfig();
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}
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}

‎src/main/java/xyz/combot/events/ThrowableHitSurface.java

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package xyz.combot.events;
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import java.util.List;
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import org.bukkit.Bukkit;
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import org.bukkit.block.BlockFace;
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import org.bukkit.configuration.file.FileConfiguration;
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import org.bukkit.entity.Arrow;
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import org.bukkit.entity.Egg;
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import org.bukkit.entity.EnderPearl;
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import org.bukkit.entity.Fireball;
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import org.bukkit.entity.Firework;
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import org.bukkit.entity.Projectile;
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import org.bukkit.entity.Snowball;
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import org.bukkit.entity.ThrownExpBottle;
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import org.bukkit.entity.ThrownPotion;
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import org.bukkit.entity.Trident;
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import org.bukkit.event.EventHandler;
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import org.bukkit.event.Listener;
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import org.bukkit.event.entity.ExpBottleEvent;
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import org.bukkit.event.entity.PotionSplashEvent;
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import org.bukkit.event.entity.ProjectileHitEvent;
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import org.bukkit.event.player.PlayerEggThrowEvent;
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import org.bukkit.metadata.FixedMetadataValue;
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import org.bukkit.metadata.MetadataValue;
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import org.bukkit.util.Vector;
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import xyz.combot.App;
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public class ThrowableHitSurface implements Listener {
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FileConfiguration config = Bukkit.getPluginManager().getPlugin(App.PluginName).getConfig();
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int maxBounceCount = config.getInt("maxBounceCount");
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boolean bouncesOffFloor = config.getBoolean("bouncesOffFloor");
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boolean bouncesOffWalls = config.getBoolean("bouncesOffWalls");
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boolean bouncesOffCeiling = config.getBoolean("bouncesOffCeiling");
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boolean chickenInEgg = config.getBoolean("chickenInEgg");
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List<String> bounceable = config.getStringList("bounceables");
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public int getBounceCount(Projectile projectile) {
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List<MetadataValue> metadata = projectile.getMetadata("bounceCount");
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if (metadata.size() == 0)
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return 0;
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return (int) metadata.get(0).value();
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}
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public void setBounceCount(Projectile projectile, int bounceCount) {
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projectile.setMetadata("bounceCount",
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new FixedMetadataValue(Bukkit.getPluginManager().getPlugin(App.PluginName), bounceCount));
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}
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public boolean getCanSplash(Projectile projectile) {
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List<MetadataValue> metadata = projectile.getMetadata("canSplash");
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if (metadata.size() == 0)
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return true;
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return (boolean) metadata.get(0).value();
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}
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public void setCanSplash(Projectile projectile, Boolean canSplash) {
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if (projectile instanceof ThrownPotion || projectile instanceof ThrownExpBottle || projectile instanceof Egg)
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projectile.setMetadata("canSplash",
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new FixedMetadataValue(Bukkit.getPluginManager().getPlugin(App.PluginName), canSplash));
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}
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@EventHandler(priority = org.bukkit.event.EventPriority.LOW)
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public void onExpBottleEvent(ExpBottleEvent event) {
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ThrownExpBottle potion = (ThrownExpBottle) event.getEntity();
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if (!getCanSplash(potion)) {
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event.setCancelled(true);
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event.setExperience(0);
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}
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}
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@EventHandler(priority = org.bukkit.event.EventPriority.LOW)
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public void onPotionSplashEvent(PotionSplashEvent event) {
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ThrownPotion potion = (ThrownPotion) event.getEntity();
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if (!getCanSplash(potion)) {
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event.setCancelled(true);
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event.getAffectedEntities().forEach(entity -> event.setIntensity(entity, 0));
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}
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}
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public Vector makeResultingVector(BlockFace hitBlockFace, Vector initVector) {
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Vector resulting = initVector.clone();
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if (hitBlockFace.getModX() != 0) // Hit Wall
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resulting.setX(initVector.getX() * -1);
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if (hitBlockFace.getModY() != 0) // Hit Floor/Ceiling
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resulting.setY(initVector.getY() * -1);
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if (hitBlockFace.getModZ() != 0) // Hit Wall
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resulting.setZ(initVector.getZ() * -1);
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return resulting.normalize();
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}
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public Projectile cloneProjectile(Projectile projectile) {
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Projectile newProjectile = (Projectile) projectile.getWorld().spawnEntity(projectile.getLocation(),
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projectile.getType());
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newProjectile.setShooter(projectile.getShooter());
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projectile.getPassengers().forEach(newProjectile::addPassenger);
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projectile.getScoreboardTags().forEach(newProjectile::addScoreboardTag);
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newProjectile.setBounce(projectile.doesBounce());
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newProjectile.setCustomName(projectile.getCustomName());
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newProjectile.setCustomNameVisible(projectile.isCustomNameVisible());
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newProjectile.setFireTicks(projectile.getFireTicks());
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newProjectile.setGlowing(projectile.isGlowing());
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newProjectile.setGravity(projectile.hasGravity());
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newProjectile.setTicksLived(projectile.getTicksLived());
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setBounceCount(newProjectile, getBounceCount(projectile));
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if (projectile instanceof ThrownPotion) {
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ThrownPotion potion = (ThrownPotion) projectile;
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ThrownPotion newPotion = (ThrownPotion) newProjectile;
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newPotion.setItem(potion.getItem());
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}
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if (projectile instanceof ThrownExpBottle) {
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ThrownExpBottle potion = (ThrownExpBottle) projectile;
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ThrownExpBottle newPotion = (ThrownExpBottle) newProjectile;
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newPotion.setItem(potion.getItem());
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}
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setCanSplash(newProjectile, getCanSplash(projectile));
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return newProjectile;
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}
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@EventHandler(priority = org.bukkit.event.EventPriority.LOW)
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public void onPlayerEggThrow(PlayerEggThrowEvent event) {
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boolean canSplash = getCanSplash(event.getEgg());
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event.setHatching(chickenInEgg && canSplash);
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}
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@EventHandler(priority = org.bukkit.event.EventPriority.HIGHEST)
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public void onThrowableHitSurface(ProjectileHitEvent event) {
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Projectile projectile = (Projectile) event.getEntity();
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if (event.getHitEntity() != null) {
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setCanSplash(projectile, true);
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return;
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}
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if (projectile instanceof Snowball && !bounceable.contains("snowball"))
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return;
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else if (projectile instanceof Egg && !bounceable.contains("egg")) {
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setCanSplash(projectile, true);
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return;
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} else if (projectile instanceof ThrownPotion && !bounceable.contains("potion")) {
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setCanSplash(projectile, true);
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return;
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} else if (projectile instanceof ThrownExpBottle && !bounceable.contains("xp_bottle")) {
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setCanSplash(projectile, true);
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return;
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} else if (projectile instanceof Arrow && !bounceable.contains("arrow"))
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return;
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else if (projectile instanceof EnderPearl && !bounceable.contains("endereye"))
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return;
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else if (projectile instanceof Firework && !bounceable.contains("firework"))
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return;
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else if (projectile instanceof Trident && !bounceable.contains("trident"))
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return;
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else if (projectile instanceof Fireball && !bounceable.contains("fireball"))
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return;
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BlockFace hitBlockFace = event.getHitBlockFace();
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if (hitBlockFace.getModY() > 0 && !bouncesOffFloor) { // Can't Bounce Floor
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setCanSplash(projectile, true);
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return;
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}
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if ((hitBlockFace.getModZ() != 0 || hitBlockFace.getModX() != 0) && !bouncesOffWalls) { // Can't Bounce Walls
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setCanSplash(projectile, true);
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return;
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}
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if (hitBlockFace.getModY() < 0 && !bouncesOffCeiling) { // Can't Bounce Ceiling
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setCanSplash(projectile, true);
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return;
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}
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int bounceCount = getBounceCount(projectile);
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if (bounceCount < maxBounceCount) {
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Projectile newentity = cloneProjectile(projectile);
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setCanSplash(projectile, false);
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setCanSplash(newentity, false);
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projectile.remove();
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setBounceCount(newentity, bounceCount + 1);
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newentity.setVelocity(makeResultingVector(hitBlockFace, projectile.getVelocity()));
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} else {
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setCanSplash(projectile, true);
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}
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}
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}

‎src/main/resources/config.yml

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# The maximum amount of times a throwable can bounce
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maxBounceCount: 3
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# If throwables should bounce off the floor
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bouncesOffFloor: true
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# If throwables should bounce off the walls
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bouncesOffWalls: true
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# If throwables should bounce off the ceiling
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bouncesOffCeiling: true
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# If eggs should hatch chickens
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# false: eggs will never hatch chickens when a player throws the egg
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# true: eggs might hatch a chicken when a player throws the egg
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# This does not affect eggs thrown by dispensers
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chickenInEgg: false
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# The items that should bounce
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# Options are
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# - snowball
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# - egg
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# - xp_bottle
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# - potion
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# - arrow
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# - endereye
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# - firework
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# - trident
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# - fireball
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bounceables:
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- snowball
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- egg
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- xp_bottle
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- potion
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- arrow
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- endereye
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- firework
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- trident
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- fireball

‎src/main/resources/plugin.yml

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main: xyz.combot.App
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name: Bounceable
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version: '0.1'

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