cpp
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JoltPhysics
зеркало из https://github.com/jrouwe/JoltPhysics.git


			
				
					
						
						
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   <div id="projectbrief">A multi core friendly Game Physics Engine</div>
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<a href="#pub-types">Public Types</a> &#124;
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  <div class="headertitle"><div class="title">SubShapeID Class Reference</div></div>
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<p>A sub shape id contains a path to an element (usually a triangle or other primitive type) of a compound shape.  
 <a href="#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="_sub_shape_i_d_8h_source.html">SubShapeID.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-types" name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a242b350b7f76646203b8f71879e260b3" id="r_a242b350b7f76646203b8f71879e260b3"><td class="memItemLeft" align="right" valign="top">using&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a> = <a class="el" href="_core_8h.html#a8f95e75e58492e87412191fabadd8ca8">uint32</a></td></tr>
<tr class="memdesc:a242b350b7f76646203b8f71879e260b3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Underlying storage type.  <br /></td></tr>
<tr class="separator:a242b350b7f76646203b8f71879e260b3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af668479f6a45736649f0881db72637a7" id="r_af668479f6a45736649f0881db72637a7"><td class="memItemLeft" align="right" valign="top">using&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#af668479f6a45736649f0881db72637a7">BiggerType</a> = <a class="el" href="_core_8h.html#a60e8696a4678cd348e991a1f172e53f7">uint64</a></td></tr>
<tr class="memdesc:af668479f6a45736649f0881db72637a7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Type that is bigger than the underlying storage type for operations that would otherwise overflow.  <br /></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:af367dd3acaba3f507a19ba0d27abd299" id="r_af367dd3acaba3f507a19ba0d27abd299"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#af367dd3acaba3f507a19ba0d27abd299">SubShapeID</a> ()=default</td></tr>
<tr class="memdesc:af367dd3acaba3f507a19ba0d27abd299"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructor.  <br /></td></tr>
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<tr class="memitem:a8f78ff809c7af2dfbd2e61ba2314ca9d" id="r_a8f78ff809c7af2dfbd2e61ba2314ca9d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a8f78ff809c7af2dfbd2e61ba2314ca9d">PopID</a> (<a class="el" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a> inBits, <a class="el" href="class_sub_shape_i_d.html">SubShapeID</a> &amp;outRemainder) const</td></tr>
<tr class="memdesc:a8f78ff809c7af2dfbd2e61ba2314ca9d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next id in the chain of ids (pops parents before children)  <br /></td></tr>
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<tr class="memitem:a93de7475867625a7b2dc053d2af57c2b" id="r_a93de7475867625a7b2dc053d2af57c2b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a93de7475867625a7b2dc053d2af57c2b">GetValue</a> () const</td></tr>
<tr class="memdesc:a93de7475867625a7b2dc053d2af57c2b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the value of the path to the sub shape ID.  <br /></td></tr>
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<tr class="memitem:a1a908b7e19b2d792793830b751a66a27" id="r_a1a908b7e19b2d792793830b751a66a27"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a1a908b7e19b2d792793830b751a66a27">SetValue</a> (<a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a> inValue)</td></tr>
<tr class="memdesc:a1a908b7e19b2d792793830b751a66a27"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set the value of the sub shape ID (use with care!)  <br /></td></tr>
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<tr class="memitem:a353cb40946046c09d50b31d73c122729" id="r_a353cb40946046c09d50b31d73c122729"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a353cb40946046c09d50b31d73c122729">IsEmpty</a> () const</td></tr>
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<tr class="memitem:a08bb5c298b21da17f8ff31502f5f90d7" id="r_a08bb5c298b21da17f8ff31502f5f90d7"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a08bb5c298b21da17f8ff31502f5f90d7">operator==</a> (const <a class="el" href="class_sub_shape_i_d.html">SubShapeID</a> &amp;inRHS) const</td></tr>
<tr class="memdesc:a08bb5c298b21da17f8ff31502f5f90d7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check equal.  <br /></td></tr>
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<tr class="memitem:a139169c43883bdc72791c61a4c40f30d" id="r_a139169c43883bdc72791c61a4c40f30d"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a139169c43883bdc72791c61a4c40f30d">operator!=</a> (const <a class="el" href="class_sub_shape_i_d.html">SubShapeID</a> &amp;inRHS) const</td></tr>
<tr class="memdesc:a139169c43883bdc72791c61a4c40f30d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check not-equal.  <br /></td></tr>
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Static Public Attributes</h2></td></tr>
<tr class="memitem:a74d6785fe41b99c0d783fb6e66c39f4d" id="r_a74d6785fe41b99c0d783fb6e66c39f4d"><td class="memItemLeft" align="right" valign="top">static constexpr <a class="el" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a74d6785fe41b99c0d783fb6e66c39f4d">MaxBits</a> = 8 * sizeof(<a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a>)</td></tr>
<tr class="memdesc:a74d6785fe41b99c0d783fb6e66c39f4d"><td class="mdescLeft">&#160;</td><td class="mdescRight">How many bits we can store in this ID.  <br /></td></tr>
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Friends</h2></td></tr>
<tr class="memitem:a2ce5af4bbd248b1e44de16419d09beee" id="r_a2ce5af4bbd248b1e44de16419d09beee"><td class="memItemLeft" align="right" valign="top">class&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a2ce5af4bbd248b1e44de16419d09beee">SubShapeIDCreator</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A sub shape id contains a path to an element (usually a triangle or other primitive type) of a compound shape. </p>
<p>Each sub shape knows how many bits it needs to encode its ID, so knows how many bits to take from the sub shape ID.</p>
<p>For example:</p><ul>
<li>We have a <a class="el" href="class_compound_shape.html" title="Base class for a compound shape.">CompoundShape</a> A with 5 child shapes (identify sub shape using 3 bits AAA)</li>
<li>One of its child shapes is <a class="el" href="class_compound_shape.html" title="Base class for a compound shape.">CompoundShape</a> B which has 3 child shapes (identify sub shape using 2 bits BB)</li>
<li>One of its child shapes is <a class="el" href="class_mesh_shape.html">MeshShape</a> C which contains enough triangles to need 7 bits to identify a triangle (identify sub shape using 7 bits CCCCCCC, note that <a class="el" href="class_mesh_shape.html">MeshShape</a> is block based and sorts triangles spatially, you can't assume that the first triangle will have bit pattern 0000000).</li>
</ul>
<p>The bit pattern of the sub shape ID to identify a triangle in <a class="el" href="class_mesh_shape.html">MeshShape</a> C will then be CCCCCCCBBAAA.</p>
<p>A sub shape ID will become invalid when the structure of the shape changes. For example, if a child shape is removed from a compound shape, the sub shape ID will no longer be valid. This can be a problem when caching sub shape IDs from one frame to the next. See comments at <a class="el" href="class_contact_listener.html#aa11e4d0107c2764e1c7e04eef72cb404">ContactListener::OnContactPersisted</a> / OnContactRemoved. </p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#af668479f6a45736649f0881db72637a7">&#9670;&#160;</a></span>BiggerType</h2>

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          <td class="memname">using <a class="el" href="#af668479f6a45736649f0881db72637a7">SubShapeID::BiggerType</a> = <a class="el" href="_core_8h.html#a60e8696a4678cd348e991a1f172e53f7">uint64</a></td>
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<p>Type that is bigger than the underlying storage type for operations that would otherwise overflow. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a242b350b7f76646203b8f71879e260b3">&#9670;&#160;</a></span>Type</h2>

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          <td class="memname">using <a class="el" href="#a242b350b7f76646203b8f71879e260b3">SubShapeID::Type</a> = <a class="el" href="_core_8h.html#a8f95e75e58492e87412191fabadd8ca8">uint32</a></td>
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<p>Underlying storage type. </p>

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<h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#af367dd3acaba3f507a19ba0d27abd299">&#9670;&#160;</a></span>SubShapeID()</h2>

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<p>Constructor. </p>

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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a93de7475867625a7b2dc053d2af57c2b">&#9670;&#160;</a></span>GetValue()</h2>

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          <td class="memname"><a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a> SubShapeID::GetValue </td>
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<p>Get the value of the path to the sub shape ID. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a353cb40946046c09d50b31d73c122729">&#9670;&#160;</a></span>IsEmpty()</h2>

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<p>Check if there is any bits of subshape ID left. Note that this is not a 100% guarantee as the subshape ID could consist of all 1 bits. Use for asserts only. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a139169c43883bdc72791c61a4c40f30d">&#9670;&#160;</a></span>operator!=()</h2>

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          <td class="paramtype">const <a class="el" href="class_sub_shape_i_d.html">SubShapeID</a> &amp;</td>          <td class="paramname"><span class="paramname"><em>inRHS</em></span></td><td>)</td>
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<p>Check not-equal. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a08bb5c298b21da17f8ff31502f5f90d7">&#9670;&#160;</a></span>operator==()</h2>

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          <td class="memname">bool SubShapeID::operator== </td>
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          <td class="paramtype">const <a class="el" href="class_sub_shape_i_d.html">SubShapeID</a> &amp;</td>          <td class="paramname"><span class="paramname"><em>inRHS</em></span></td><td>)</td>
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<p>Check equal. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a8f78ff809c7af2dfbd2e61ba2314ca9d">&#9670;&#160;</a></span>PopID()</h2>

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          <td class="memname"><a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a> SubShapeID::PopID </td>
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          <td class="paramtype"><a class="el" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a></td>          <td class="paramname"><span class="paramname"><em>inBits</em></span>, </td>
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          <td class="paramtype"><a class="el" href="class_sub_shape_i_d.html">SubShapeID</a> &amp;</td>          <td class="paramname"><span class="paramname"><em>outRemainder</em></span>&#160;) const</td>
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<p>Get the next id in the chain of ids (pops parents before children) </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a1a908b7e19b2d792793830b751a66a27">&#9670;&#160;</a></span>SetValue()</h2>

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          <td class="memname">void SubShapeID::SetValue </td>
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<p>Set the value of the sub shape ID (use with care!) </p>

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<h2 class="groupheader">Friends And Related Symbol Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a2ce5af4bbd248b1e44de16419d09beee">&#9670;&#160;</a></span>SubShapeIDCreator</h2>

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          <td class="memname">friend class <a class="el" href="class_sub_shape_i_d_creator.html">SubShapeIDCreator</a></td>
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<h2 class="groupheader">Member Data Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a74d6785fe41b99c0d783fb6e66c39f4d">&#9670;&#160;</a></span>MaxBits</h2>

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          <td class="memname"><a class="el" href="_core_8h.html#a69aa29b598b851b0640aa225a9e5d61d">uint</a> SubShapeID::MaxBits = 8 * sizeof(<a class="el" href="#a242b350b7f76646203b8f71879e260b3">Type</a>)</td>
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<p>How many bits we can store in this ID. </p>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li>Jolt/Physics/Collision/Shape/<a class="el" href="_sub_shape_i_d_8h_source.html">SubShapeID.h</a></li>
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