54 lines
3.2 KiB
Diff
54 lines
3.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Lucavon <lucavonlp@gmail.com>
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Date: Tue, 23 Jul 2019 20:29:20 -0500
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Subject: [PATCH] Configurable projectile relative velocity
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This patch adds an option "disable relative projectile velocity", which, when
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nabled, will cause projectiles to ignore the shooter's current velocity,
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like they did in Minecraft 1.8 and prior.
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If a player is falling, for example, their shooting range will be drastically
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reduced, as a downwards velocity is applied to the projectile. This prevents
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players from saving themselves from falling off floating islands, for example,
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as a thrown ender pearl will not make it back to the island, while it would
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have in 1.8.
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While this could easily be done with plugins, too, there are multiple problems:
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P1) If multiple plugins cancel the velocity by subtracting the shooter's velocity
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from the projectile's velocity, the projectile's velocity would be different.
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As there's no way to detect whether the projectile's velocity has already been
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adjusted to ignore the player's velocity, plugins can't not do it if it's not
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necessary.
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P2) I've noticed some inconsistencies, e.g. weird velocity when shooting while
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using an elytra. Checking for those inconsistencies is possible, but not as
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efficient as just not applying the velocity in the first place.
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P3) Solutions for 1) and especially 2) might not be future-proof, while this
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server-internal fix makes this change future-proof.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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index 16727e92f591725c8f8cefb250b7ab8c64a19472..a6e68b2ab8890d9d2a842ca0a6b565a1831fed6b 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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@@ -509,4 +509,9 @@ public class PaperWorldConfig {
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}
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log("Anti-Xray: " + (antiXray ? "enabled" : "disabled") + " / Engine Mode: " + engineMode.getDescription() + " / Up to " + ((maxChunkSectionIndex + 1) * 16) + " blocks / Update Radius: " + updateRadius);
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}
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+
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+ public boolean disableRelativeProjectileVelocity;
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+ private void disableRelativeProjectileVelocity() {
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+ disableRelativeProjectileVelocity = getBoolean("game-mechanics.disable-relative-projectile-velocity", false);
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+ }
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}
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diff --git a/src/main/java/net/minecraft/server/IProjectile.java b/src/main/java/net/minecraft/server/IProjectile.java
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index ceecb0520a63d2eff5f4cadf45fa49f56eaea8dd..ecdc717b3013749ed2384a143d6b6eef07f6f642 100644
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--- a/src/main/java/net/minecraft/server/IProjectile.java
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+++ b/src/main/java/net/minecraft/server/IProjectile.java
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@@ -114,7 +114,7 @@ public abstract class IProjectile extends Entity {
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this.shoot((double) f5, (double) f6, (double) f7, f3, f4);
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Vec3D vec3d = entity.getMot();
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- this.setMot(this.getMot().add(vec3d.x, entity.isOnGround() ? 0.0D : vec3d.y, vec3d.z));
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+ if (!entity.world.paperConfig.disableRelativeProjectileVelocity) this.setMot(this.getMot().add(vec3d.x, entity.isOnGround() ? 0.0D : vec3d.y, vec3d.z)); // Paper - allow disabling relative velocity
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}
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protected void a(MovingObjectPosition movingobjectposition) {
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