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| <div class="subTitle">org.apache.commons.math3.geometry.partitioning</div> |
| <h2 title="Interface BSPTree.LeafMerger" class="title">Interface BSPTree.LeafMerger<S extends <a href="../../../../../../org/apache/commons/math3/geometry/Space.html" title="interface in org.apache.commons.math3.geometry">Space</a>></h2> |
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| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>S</code> - Type of the space.</dd></dl> |
| <dl> |
| <dt>Enclosing class:</dt> |
| <dd><a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="type parameter in BSPTree">S</a> extends <a href="../../../../../../org/apache/commons/math3/geometry/Space.html" title="interface in org.apache.commons.math3.geometry">Space</a>></dd> |
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| <pre>public static interface <span class="strong">BSPTree.LeafMerger<S extends <a href="../../../../../../org/apache/commons/math3/geometry/Space.html" title="interface in org.apache.commons.math3.geometry">Space</a>></span></pre> |
| <div class="block">This interface gather the merging operations between a BSP tree |
| leaf and another BSP tree. |
| <p>As explained in Bruce Naylor, John Amanatides and William |
| Thibault paper <a |
| href="http://www.cs.yorku.ca/~amana/research/bsptSetOp.pdf">Merging |
| BSP Trees Yields Polyhedral Set Operations</a>, |
| the operations on <a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning"><code>BSP trees</code></a> can be expressed as a |
| generic recursive merging operation where only the final part, |
| when one of the operand is a leaf, is specific to the real |
| operation semantics. For example, a tree representing a region |
| using a boolean attribute to identify inside cells and outside |
| cells would use four different objects to implement the final |
| merging phase of the four set operations union, intersection, |
| difference and symmetric difference (exclusive or).</p></div> |
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| <th class="colLast" scope="col">Method and Description</th> |
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| <td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html#merge(org.apache.commons.math3.geometry.partitioning.BSPTree, org.apache.commons.math3.geometry.partitioning.BSPTree, org.apache.commons.math3.geometry.partitioning.BSPTree, boolean, boolean)">merge</a></strong>(<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> leaf, |
| <a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> tree, |
| <a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> parentTree, |
| boolean isPlusChild, |
| boolean leafFromInstance)</code> |
| <div class="block">Merge a leaf node and a tree node.</div> |
| </td> |
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| <a name="merge(org.apache.commons.math3.geometry.partitioning.BSPTree, org.apache.commons.math3.geometry.partitioning.BSPTree, org.apache.commons.math3.geometry.partitioning.BSPTree, boolean, boolean)"> |
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| <h4>merge</h4> |
| <pre><a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> merge(<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> leaf, |
| <a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> tree, |
| <a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html" title="class in org.apache.commons.math3.geometry.partitioning">BSPTree</a><<a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.LeafMerger.html" title="type parameter in BSPTree.LeafMerger">S</a>> parentTree, |
| boolean isPlusChild, |
| boolean leafFromInstance)</pre> |
| <div class="block">Merge a leaf node and a tree node. |
| <p>This method is called at the end of a recursive merging |
| resulting from a <code>tree1.merge(tree2, leafMerger)</code> |
| call, when one of the sub-trees involved is a leaf (i.e. when |
| its cut-hyperplane is null). This is the only place where the |
| precise semantics of the operation are required. For all upper |
| level nodes in the tree, the merging operation is only a |
| generic partitioning algorithm.</p> |
| <p>Since the final operation may be non-commutative, it is |
| important to know if the leaf node comes from the instance tree |
| (<code>tree1</code>) or the argument tree |
| (<code>tree2</code>). The third argument of the method is |
| devoted to this. It can be ignored for commutative |
| operations.</p> |
| <p>The <a href="../../../../../../org/apache/commons/math3/geometry/partitioning/BSPTree.html#insertInTree(org.apache.commons.math3.geometry.partitioning.BSPTree, boolean)"><code>BSPTree.insertInTree</code></a> method |
| may be useful to implement this method.</p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>leaf</code> - leaf node (its cut hyperplane is guaranteed to be |
| null)</dd><dd><code>tree</code> - tree node (its cut hyperplane may be null or not)</dd><dd><code>parentTree</code> - parent tree to connect to (may be null)</dd><dd><code>isPlusChild</code> - if true and if parentTree is not null, the |
| resulting tree should be the plus child of its parent, ignored if |
| parentTree is null</dd><dd><code>leafFromInstance</code> - if true, the leaf node comes from the |
| instance tree (<code>tree1</code>) and the tree node comes from |
| the argument tree (<code>tree2</code>)</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the BSP tree resulting from the merging (may be one of |
| the arguments)</dd></dl> |
| </li> |
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