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    <title>Mojang Studios Jira</title>
    <link>https://bugs.mojang.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en</language>    <build-info>
        <version>9.12.2</version>
        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
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<item>
            <title>[MC-3248] Getting damage reduces TNT knockback</title>
                <link>https://bugs.mojang.com/browse/MC-3248</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;h3&gt;&lt;a name=&quot;Thebug&quot;&gt;&lt;/a&gt;The bug&lt;/h3&gt;
&lt;p&gt;Like how random falling damage seemed when it first debuted in 1.3, I&apos;m not sure if this is a bug or a deliberate change to gameplay mechanics, so...&lt;/p&gt;

&lt;p&gt;Player launchers are a popular Minecraft invention. Basically, they involve wiring a ring of TNT so it detonates around the player and propels him/her skyward. However, they only work properly in Creative or Peaceful mode. When you switch to Survival on Easy, Normal, or Hard mode, their launching power receives a seemingly arbitrary nerf. A Player Launcher charged with 32 TNT blocks can send you over 300 blocks high in Creative/Peaceful, but on any other difficulty, the height caps out at about 66 blocks for seemingly no reason.&lt;/p&gt;

&lt;p&gt;Here&apos;s a brand new video showcasing the issue: &lt;a href=&quot;http://youtu.be/XihAFVogAQ8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://youtu.be/XihAFVogAQ8&lt;/a&gt;&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;Codeanalysis&quot;&gt;&lt;/a&gt;Code analysis&lt;/h3&gt;
&lt;p&gt;Code analysis by &lt;a href=&quot;https://bugs.mojang.com/secure/ViewProfile.jspa?name=marcono1234&quot; class=&quot;user-hover&quot; rel=&quot;marcono1234&quot;&gt;marcono1234&lt;/a&gt; can be found in &lt;a href=&quot;https://bugs.mojang.com/browse/MC-3248?focusedCommentId=295320&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-295320&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;this comment&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="15225">MC-3248</key>
            <summary>Getting damage reduces TNT knockback</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="4" iconUrl="https://bugs.mojang.com/images/icons/statuses/reopened.png" description="This issue was once resolved, but the resolution was deemed incorrect. From here issues are either marked assigned or resolved.">Reopened</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="conem">Conem</reporter>
                        <labels>
                    </labels>
                <created>Sat, 17 Nov 2012 07:10:56 +0100</created>
                <updated>Sun, 4 Feb 2024 19:53:01 +0100</updated>
                                            <version>Minecraft 1.4.4</version>
                    <version>Minecraft 1.4.7</version>
                    <version>Snapshot 13w05b</version>
                    <version>Minecraft 1.5.2</version>
                    <version>Minecraft 1.6.1</version>
                    <version>Minecraft 1.6.2</version>
                    <version>Minecraft 14w30c</version>
                    <version>Minecraft 14w32a</version>
                    <version>Minecraft 14w34c</version>
                    <version>Minecraft 1.9</version>
                    <version>Minecraft 1.10.2</version>
                    <version>Minecraft 1.11</version>
                    <version>Minecraft 1.12.2</version>
                    <version>Minecraft 18w20c</version>
                    <version>Minecraft 1.13.1</version>
                    <version>1.16 Pre-release 2</version>
                    <version>1.16 Pre-release 4</version>
                    <version>1.16 Pre-release 5</version>
                    <version>1.16 Pre-release 7</version>
                    <version>1.16.4</version>
                    <version>20w46a</version>
                    <version>20w51a</version>
                    <version>21w03a</version>
                    <version>21w05b</version>
                    <version>1.20.4</version>
                    <version>24w05b</version>
                                                                        <votes>38</votes>
                                    <watches>17</watches>
                                                                            <comments>
                            <comment id="917168" author="farogaming" created="Tue, 9 Feb 2021 15:02:51 +0100"  >&lt;p&gt;Those are not valid on the bug tracker. If you find bugs while playing with Optifine, always verify that they also occur in Vanilla.&lt;/p&gt;</comment>
                            <comment id="916896" author="JIRAUSER606864" created="Tue, 9 Feb 2021 09:24:46 +0100"  >&lt;p&gt;Can confirm in 1.16.5-Optifine_HD_U_G6&lt;/p&gt;</comment>
                            <comment id="914302" author="JIRAUSER566325" created="Fri, 5 Feb 2021 21:02:38 +0100"  >&lt;p&gt;Can confirm in 21w05b.&lt;/p&gt;</comment>
                            <comment id="907976" author="JIRAUSER566325" created="Fri, 29 Jan 2021 17:40:40 +0100"  >&lt;p&gt;Can confirm in 21w03a.&lt;/p&gt;</comment>
                            <comment id="891858" author="JIRAUSER566325" created="Fri, 8 Jan 2021 15:23:27 +0100"  >&lt;p&gt;Can confirm in 20w51a.&lt;/p&gt;</comment>
                            <comment id="732889" author="JIRAUSER499978" created="Wed, 17 Jun 2020 11:53:15 +0200"  >&lt;p&gt;Confirmed in 1.16-pre7.&lt;/p&gt;</comment>
                            <comment id="728827" author="JIRAUSER499978" created="Fri, 12 Jun 2020 23:57:06 +0200"  >&lt;p&gt;Confirmed in 1.16-pre5.&lt;/p&gt;</comment>
                            <comment id="728217" author="JIRAUSER499978" created="Fri, 12 Jun 2020 16:31:42 +0200"  >&lt;p&gt;Confirmed in 1.16-pre4.&lt;/p&gt;</comment>
                            <comment id="722154" author="JIRAUSER499978" created="Sun, 7 Jun 2020 20:35:06 +0200"  >&lt;p&gt;Confirmed in 1.16 Pre-release 2.&lt;/p&gt;</comment>
                            <comment id="485864" author="kraif" created="Wed, 29 Aug 2018 17:46:53 +0200"  >&lt;p&gt;Confirmed for 1.13.1. Please, if you don&apos;t mind, I&apos;d like to be the reporter of this issue, I&apos;ll update it accordingly.&lt;/p&gt;</comment>
                            <comment id="346037" author="fm22" created="Sat, 26 Nov 2016 12:36:18 +0100"  >&lt;p&gt;Can confirm for 1.11&lt;/p&gt;</comment>
                            <comment id="321081" author="farogaming" created="Sat, 16 Jul 2016 18:09:28 +0200"  >&lt;p&gt;I always tested it with resistance 5, because the title is misleading. Changed it now and can confirm it, too.&lt;/p&gt;</comment>
                            <comment id="318308" author="ikgawinne" created="Wed, 29 Jun 2016 17:44:00 +0200"  >&lt;p&gt;Unfortunately, i have just tested this in 1.10.2, and i still have the problem. I use a dispenser tnt launcher with 12 tnt&apos;s per blast. With survival difficulty &amp;gt;0, i gain ~60 blocks height, whilst survival difficulty 0 gives me around ~190 blocks of altitude.&lt;/p&gt;

&lt;p&gt;The setup i use is as follows:&lt;br/&gt;
I am standing on a fence surrounded by 8 water blocks in a square. Facing these water blocks are 12 dispensers filled with tnt which will instantly activate when a button is pressed.&lt;/p&gt;

&lt;p&gt;Edit:&lt;br/&gt;
I&apos;ve just redone your (Fabian&apos;s, see comments) test (as i understood it), and for me it gives the following results:&lt;/p&gt;

&lt;p&gt;Survival, difficulty 0:&lt;br/&gt;
86 blocks &lt;br/&gt;
Survival, difficulty &amp;gt;0&lt;br/&gt;
60 blocks&lt;br/&gt;
Creative, any difficulty&lt;br/&gt;
86 blocks&lt;/p&gt;

&lt;p&gt;Fabian, can you respecify your test? It&apos;s a bit strange that we get different results while attempting the same experiment.&lt;/p&gt;

&lt;p&gt;Again, i&apos;m fairly certain this is a result of the damage calculation. The damage dealt to the player knocks the player and thus slows it down. I believe this should not happen since acceleration happens regardless of how pleasant this is for any entity, and therefore i suggest that all situations should result in the same (86 blocks) result.&lt;/p&gt;</comment>
                            <comment id="318298" author="farogaming" created="Wed, 29 Jun 2016 16:52:03 +0200"  >&lt;p&gt;I just tested in 1.10.2: I made five command blocks summon an instantly exploding TNT exactly on me. Tested in Creative and Survival, each difficulty 0 and 1. All tests launched me about 60 blocks up. Is there something wrong with my setup or is this bug fixed?&lt;/p&gt;</comment>
                            <comment id="295320" author="marcono1234" created="Fri, 18 Mar 2016 14:41:06 +0100"  >&lt;p&gt;Please link to this comment in the description&lt;/p&gt;

&lt;p&gt;The following is based on decompiled version of Minecraft 1.9 using MCP 9.24 beta. All method and class names are the names used in the decompiled version.&lt;/p&gt;

&lt;p&gt;The reason why this happens is very likely because the damage the player takes counteracts the motion caused by the explosion. This is because a &lt;tt&gt;net.minecraft.network.play.server.SPacketEntityVelocity&lt;/tt&gt; packet is sent and maybe due to the delay between sending and receiving the packet the motion is not correct, but that is only an assumption.&lt;/p&gt;</comment>
                            <comment id="293171" author="jw-mink@hotmail.com" created="Mon, 7 Mar 2016 15:20:37 +0100"  >&lt;p&gt;I also found this bug in 1.9! Hope it can be fixed as soon as possible.&lt;/p&gt;</comment>
                            <comment id="292236" author="ikgawinne" created="Fri, 4 Mar 2016 00:35:37 +0100"  >&lt;p&gt;It&apos;s still a concern in 1.9, why does it show &quot;resolved&quot;?&lt;/p&gt;</comment>
                            <comment id="205038" author="galaxy_2alex" created="Fri, 24 Oct 2014 22:33:31 +0200"  >&lt;p&gt;Is this still a concern in the &lt;em&gt;current Minecraft version&lt;/em&gt; &lt;b&gt;1.8.1 Prerelease 3&lt;/b&gt; / Launcher version &lt;b&gt;1.5.3&lt;/b&gt; or later? If so, please &lt;em&gt;update the affected versions&lt;/em&gt; in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="180487" author="ck20xx" created="Sun, 27 Jul 2014 05:30:52 +0200"  >&lt;p&gt;It sure is! I made a new video about it too. &lt;a href=&quot;https://www.youtube.com/watch?v=uyXdu7z1-E0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.youtube.com/watch?v=uyXdu7z1-E0&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;It may be more of an unintentional feature than a glitch. It probably has to do with how you take no damage from TNT in creative or peaceful, while in a normal survival situation, simultaneous blasts of TNT can end up canceling each other out a bit and give you less vertical thrust. It&apos;s still inconvenient though cause it means a machine like a player launcher functions differently in a creative testing world, so you can&apos;t properly gauge how well it will work if rebuilt in survival.&lt;/p&gt;</comment>
                            <comment id="180277" author="ezekielelin" created="Sat, 26 Jul 2014 20:55:45 +0200"  >&lt;p&gt;Is this still a concern in the latest Minecraft version &lt;b&gt;14w30c&lt;/b&gt;? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="133354" author="galaxy_2alex" created="Tue, 21 Jan 2014 23:11:27 +0100"  >&lt;p&gt;Is this still a concern in the &lt;em&gt;current Minecraft version&lt;/em&gt; &lt;b&gt;1.7.4&lt;/b&gt; / Launcher version &lt;b&gt;1.3.8&lt;/b&gt; or later? If so, please &lt;em&gt;update the affected versions&lt;/em&gt; in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="98962" author="tamtam18_2" created="Thu, 15 Aug 2013 16:26:11 +0200"  >&lt;p&gt;Yes this is still a problem. And I have attached a world save file (TNT Cannon) from the current version (1.6.2) to prove it.&lt;/p&gt;

&lt;p&gt;This was from my own issue report, but it describes how the players are being affected more clearly:&lt;/p&gt;

&lt;p&gt;&quot;When on Peaceful mode TNT has the capability of launching the player past sky limit. But on easy, normal, and hard modes TNT isn&apos;t able to do much; It can&apos;t even send players 50 blocks in one direction.&lt;br/&gt;
Regardless of survival and creative, this still happens in both game modes. I have attached the following a world compromised of a TNT cannon setup to prove this bug exists. I&apos;ve tested TNT multiple times with this cannon and the results are the same no matter how the cannon is configured, even in survival and creative. Peaceful is more powerful than the other 3 modes.&quot;&lt;/p&gt;

&lt;p&gt;And also I can support that no matter how much TNT, even three TNT will only launch you a short amount rather than peaceful mode.&lt;/p&gt;</comment>
                            <comment id="53629" author="bljat" created="Fri, 15 Mar 2013 19:20:33 +0100"  >&lt;p&gt;Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="43919" author="ck20xx" created="Wed, 6 Feb 2013 03:11:19 +0100"  >&lt;p&gt;Yep! This time I recorded a video about the issue as well. Just follow the new link in the description.&lt;/p&gt;</comment>
                            <comment id="43747" author="bljat" created="Tue, 5 Feb 2013 17:11:15 +0100"  >&lt;p&gt;Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="49300">MC-28859</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="39519" name="TNT Cannon.rar" size="318732" author="tamtam18_2" created="Thu, 15 Aug 2013 16:26:11 +0200"/>
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