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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-1677] Retracting piston shows ghost hitbox of technical block</title>
                <link>https://bugs.mojang.com/browse/MC-1677</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;The hitbox of a retracting piston is postitioned incorrectly. See attached screenshot.&lt;/p&gt;

&lt;p&gt;Just look at the piston while it is retracting and aim at the back part so the hitbox is visible.&lt;/p&gt;

&lt;p&gt;Ideally you connect it to a redstone clock or something similar so you don&apos;t have to flip levers.&lt;/p&gt;</description>
                <environment>Windows 7</environment>
        <key id="13035">MC-1677</key>
            <summary>Retracting piston shows ghost hitbox of technical block</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="5" iconUrl="https://bugs.mojang.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="1">Fixed</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="jonathanhaas">Jonathan Haas</reporter>
                        <labels>
                            <label>hitbox</label>
                            <label>piston</label>
                            <label>visual</label>
                    </labels>
                <created>Thu, 1 Nov 2012 19:22:23 +0100</created>
                <updated>Thu, 24 Nov 2016 00:58:49 +0100</updated>
                            <resolved>Thu, 17 Jul 2014 21:30:22 +0200</resolved>
                                    <version>Minecraft 1.4.1</version>
                    <version>Minecraft 1.4.2</version>
                    <version>Minecraft 1.4.3</version>
                    <version>Minecraft 1.4.6</version>
                    <version>Minecraft 1.4.7</version>
                    <version>Snapshot 13w01a</version>
                    <version>Snapshot 13w01b</version>
                    <version>Snapshot 13w02a</version>
                    <version>Snapshot 13w03a</version>
                    <version>Snapshot 13w04a</version>
                    <version>Snapshot 13w05b</version>
                    <version>Snapshot 13w06a</version>
                    <version>Minecraft 1.5</version>
                    <version>Minecraft 1.5.1</version>
                    <version>Minecraft 1.5.2</version>
                    <version>Snapshot 13w17a</version>
                    <version>Snapshot 13w18a</version>
                    <version>Snapshot 13w18b</version>
                    <version>Snapshot 13w18c</version>
                    <version>Snapshot 13w19a</version>
                    <version>Minecraft 1.6.1</version>
                    <version>Minecraft 1.6.2</version>
                    <version>Minecraft 13w38c</version>
                    <version>Minecraft 1.7.4</version>
                    <version>Minecraft 14w04b</version>
                    <version>Minecraft 14w05b</version>
                    <version>Minecraft 14w06a</version>
                    <version>Minecraft 14w06b</version>
                    <version>Minecraft 14w07a</version>
                    <version>Minecraft 14w08a</version>
                    <version>Minecraft 1.7.5</version>
                    <version>Minecraft 14w10c</version>
                    <version>Minecraft 1.7.9</version>
                    <version>Minecraft 14w17a</version>
                    <version>Minecraft 14w18b</version>
                    <version>Minecraft 14w19a</version>
                    <version>Minecraft 14w20a</version>
                    <version>Minecraft 14w20b</version>
                    <version>Minecraft 14w21a</version>
                    <version>Minecraft 14w21b</version>
                    <version>Minecraft 14w25b</version>
                                    <fixVersion>Minecraft 14w29b</fixVersion>
                                                        <votes>12</votes>
                                    <watches>7</watches>
                                                                            <comments>
                            <comment id="176713" author="kumasasa" created="Thu, 17 Jul 2014 21:30:22 +0200"  >&lt;p&gt;Fixed in 14w29b&lt;/p&gt;</comment>
                            <comment id="166324" author="garyclosse" created="Sat, 21 Jun 2014 17:37:17 +0200"  >&lt;p&gt;Confirmed for 14w25b.&lt;/p&gt;</comment>
                            <comment id="160711" author="garyclosse" created="Thu, 29 May 2014 12:27:17 +0200"  >&lt;p&gt;Confirmed for 14w21b.&lt;/p&gt;</comment>
                            <comment id="157774" author="garyclosse" created="Thu, 15 May 2014 18:34:49 +0200"  >&lt;p&gt;Confirmed for 14w20a and b.&lt;/p&gt;</comment>
                            <comment id="156479" author="garyclosse" created="Thu, 8 May 2014 17:16:19 +0200"  >&lt;p&gt;Confirmed for 14w19a.&lt;/p&gt;</comment>
                            <comment id="155362" author="garyclosse" created="Sun, 4 May 2014 16:23:28 +0200"  >&lt;p&gt;You&apos;re certainly right. Maybe should you rewrite the title?&lt;/p&gt;</comment>
                            <comment id="155361" author="jonathanhaas" created="Sun, 4 May 2014 16:21:10 +0200"  >&lt;p&gt;Gary, that&apos;s possible, but I&apos;m pretty sure there is no real need or reason to display the hitbox of an otherwise invisible technical box to the player. The engine is certainly capable of removing or changing the hitbox for certain blocks. So I still think this is b bug and should be fixed.&lt;/p&gt;</comment>
                            <comment id="155099" author="garyclosse" created="Sat, 3 May 2014 14:29:32 +0200"  >&lt;p&gt;I begin to think that it works as intended because when a piston retracts itself, &lt;b&gt;you don&apos;t see its own hitbox, but the &quot;piston_extension&quot; hitbox&lt;/b&gt;. This technical block is necessary for the proper functioning of the piston, and I doubt that its hitbox can be removed. Here&apos;s a picture which illustrates my point.&lt;/p&gt;</comment>
                            <comment id="154879" author="dsohler" created="Fri, 2 May 2014 21:37:51 +0200"  >&lt;p&gt;Confirmed in 14w18b (plus: the connection part of the front and the piston body sticks through the piston body if you create a Redstone block and piston clock)&lt;/p&gt;</comment>
                            <comment id="146102" author="garyclosse" created="Mon, 10 Mar 2014 17:57:00 +0100"  >&lt;p&gt;Confirmed for 1.7.5 and 14w10c&lt;/p&gt;</comment>
                            <comment id="142550" author="garyclosse" created="Sat, 22 Feb 2014 23:32:42 +0100"  >&lt;p&gt;Confirmed for 08a&lt;/p&gt;</comment>
                            <comment id="140146" author="garyclosse" created="Fri, 14 Feb 2014 15:42:59 +0100"  >&lt;p&gt;Also affects 07a&lt;/p&gt;</comment>
                            <comment id="139395" author="garyclosse" created="Sun, 9 Feb 2014 18:14:52 +0100"  >&lt;p&gt;Still affects 1.8 snapshots and 1.7.4&lt;/p&gt;</comment>
                            <comment id="133815" author="kuubaku" created="Thu, 23 Jan 2014 05:22:24 +0100"  >&lt;p&gt;The piston hitbox can now sometimes be seen partially in front of it, offset by the width of piston head. Piston head hitbox can appear offset likewise, and it also may appear behind the piston.&lt;/p&gt;</comment>
                            <comment id="133572" author="ezekielelin" created="Wed, 22 Jan 2014 17:01:53 +0100"  >&lt;p&gt;Is this still a concern in the latest Minecraft version &lt;b&gt;14w03b&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="47213" author="matojeje" created="Sat, 23 Feb 2013 16:02:03 +0100"  >&lt;p&gt;OK, thanks&lt;/p&gt;</comment>
                            <comment id="47111" author="jonathanhaas" created="Fri, 22 Feb 2013 20:22:14 +0100"  >&lt;p&gt;Official name? Hitbox is explained here: &lt;a href=&quot;http://en.wikipedia.org/wiki/Hitbox&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://en.wikipedia.org/wiki/Hitbox&lt;/a&gt;&lt;br/&gt;
Basically for Minecraft it&apos;s the shape that affects collision and it&apos;s also visible if you move the mouse on a block. However for some blocks the visible hitbox is different to the collision hitbox (compare for example fences).&lt;/p&gt;</comment>
                            <comment id="47110" author="kumasasa" created="Fri, 22 Feb 2013 20:19:52 +0100"  >&lt;p&gt;&quot;Paul&quot; ? &lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://en.wikipedia.org/wiki/Hitbox&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://en.wikipedia.org/wiki/Hitbox&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="47109" author="matojeje" created="Fri, 22 Feb 2013 20:18:12 +0100"  >&lt;p&gt;I attach my own.&lt;/p&gt;</comment>
                            <comment id="47102" author="matojeje" created="Fri, 22 Feb 2013 19:37:01 +0100"  >&lt;p&gt;May I ask, what&apos;s the official name of &quot;hitbox&quot;?&lt;/p&gt;</comment>
                            <comment id="40474" author="kumasasa" created="Sun, 27 Jan 2013 21:11:42 +0100"  >&lt;p&gt;Confirmed.&lt;/p&gt;</comment>
                            <comment id="33514" author="tom_mai78101" created="Sun, 6 Jan 2013 07:33:54 +0100"  >&lt;p&gt;You should&apos;ve added that portion to this issue&apos;s description. &lt;/p&gt;</comment>
                            <comment id="19208" author="jonathanhaas" created="Wed, 7 Nov 2012 18:53:30 +0100"  >&lt;p&gt;Just by looking at the piston while it is retracting and aiming at the back part so the hitbox is visible. &lt;/p&gt;

&lt;p&gt;Ideally you connect it to a redstone clock or something similar so you don&apos;t have to flip levers or something.&lt;/p&gt;

&lt;p&gt;Apart from the visually incorrect hitbox, I assume some bugs like falling through pistons while they are retracting are caused by this.&lt;/p&gt;</comment>
                            <comment id="19201" author="tom_mai78101" created="Wed, 7 Nov 2012 18:37:06 +0100"  >&lt;p&gt;How do you reproduce it?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="31010">MC-15303</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="31441">MC-15678</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="42492">MC-23305</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="47016">MC-27200</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="50969">MC-29872</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="74099">MC-48391</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="81302">MC-54936</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="11719" name="2012-11-01_17.14.11.png" size="354050" author="jonathanhaas" created="Thu, 1 Nov 2012 19:22:23 +0100"/>
                            <attachment id="22244" name="2013-02-22_09.10.23.png" size="312771" author="matojeje" created="Fri, 22 Feb 2013 20:18:12 +0100"/>
                            <attachment id="22245" name="2013-02-22_09.10.26.png" size="309429" author="matojeje" created="Fri, 22 Feb 2013 20:18:12 +0100"/>
                            <attachment id="62667" name="2014-05-03_14.12.16.png" size="103997" author="garyclosse" created="Sat, 3 May 2014 14:29:32 +0200"/>
                            <attachment id="62576" name="shot0001.jpg" size="128473" author="dsohler" created="Fri, 2 May 2014 21:37:51 +0200"/>
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