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<p>Hi Alexandre</p>
<p><br>
</p>
<p>This seems to be a bug caused by some floating point error or
some mis handling of the coordinates.</p>
<p><br>
</p>
<p>In 3D the intersects function just wrapps ST_3DDistance and
checks if it returns 0.</p>
<p>So when trying with the same geometries with ST_3DDistance
instead it returns 3.638977870632214e-12</p>
<br>
<p>I will take a look at it.</p>
<p><br>
</p>
<p>Could you please file a ticket?</p>
<p><br>
</p>
<p>ATB</p>
<p><br>
</p>
<p>Nicklas Avén<br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/12/20 2:46 AM, Alexandre Neto
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CA+H0G_GT+B605kK_0t+6ZWg4FJ9G8=OTVVjOxdMNjY54zD9gjg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi,
<div><br>
</div>
<div>I am having a strange issue with st_3dintersects. I have
two linestring that share the same end vertex. Nevertheless,
using ST_3dintersects returns false.<br>
</div>
<div><br>
</div>
<div> SELECT
ST_3dintersects(st_geometryfromtext('LINESTRING Z (-27922.1593
-110233.7616 147.2259,-27928.084 -110230.8462
147.3629,-27930.6374 -110229.9248 147.3629,-27931.6207
-110229.587 147.3094,-27932.3841 -110229.275
147.3676,-27933.1861 -110228.9467 147.4365,-27937.0309
-110227.3638 147.7729,-27937.7892 -110227.0474
147.8412,-27938.6259 -110226.6885 147.9075,-27939.4617
-110226.3287 147.9663,-27943.6905 -110224.5169
148.2353,-27944.5442 -110224.1538 148.2687,-27945.6634
-110223.6871 148.2849,-27946.7835 -110223.2224
148.2982,-27952.3498 -110220.9011 148.3594,-27953.4568
-110220.4353 148.3756,-27966.8502 -110214.6482
148.7361,-27969.516 -110213.4996 148.7961,-27972.1805
-110212.3494 148.8566,-27974.1264 -110211.5032 148.9768,<font
color="#0000ff">-27975.4229 -110210.9441 149.0093</font>)'),<br>
st_geometryfromtext('LINESTRING Z (-28001.1829
-110201.8973 149.4396,-28000.3665 -110199.7073
149.3765,-27995.4183 -110201.8041 149.3354,<font
color="#0000ff">-27975.4229 -110210.9441 149.0093</font>)'))<br>
</div>
<div><br>
</div>
<div>Any idea what could be happening in here?</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Alexandre Neto</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
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