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<div class="subTitle">healpix.essentials</div>
<h2 title="Class HealpixBase" class="title">Class HealpixBase</h2>
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<li><a href="../../healpix/essentials/HealpixTables.html" title="class in healpix.essentials">healpix.essentials.HealpixTables</a></li>
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<li>healpix.essentials.HealpixBase</li>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../healpix/essentials/HealpixMapDouble.html" title="class in healpix.essentials">HealpixMapDouble</a>, <a href="../../healpix/essentials/HealpixMapFloat.html" title="class in healpix.essentials">HealpixMapFloat</a>, <a href="../../healpix/essentials/HealpixProc.html" title="class in healpix.essentials">HealpixProc</a></dd>
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<pre>public class <span class="typeNameLabel">HealpixBase</span>
extends <a href="../../healpix/essentials/HealpixTables.html" title="class in healpix.essentials">HealpixTables</a></pre>
<div class="block">Basic opersations related to the HEALPix pixelisation.
This class is conceptually very similar the the Healpix_Base class
of Healpix_cxx. It supports the NESTED scheme for nside parameters which are
powers of 2, and the RING scheme for arbitrary positive nside parameters.
The maximum supported nside parameter is 2^29.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../serialized-form.html#healpix.essentials.HealpixBase">Serialized Form</a></dd>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
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<td class="colFirst"><code>protected class </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a></span></code> </td>
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<td class="colFirst"><code>protected double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#fact1">fact1</a></span></code> </td>
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<tr class="rowColor">
<td class="colFirst"><code>protected double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#fact2">fact2</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ncap">ncap</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nl2">nl2</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nl3">nl3</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nl4">nl4</a></span></code> </td>
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<tr class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#npface">npface</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#npix">npix</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ns_max">ns_max</a></span></code>
<div class="block">Maximum Nside parameter; equivalent to 2^<code>order_max</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nside">nside</a></span></code>
<div class="block">The Nside parameter.</div>
</td>
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<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#order">order</a></span></code>
<div class="block">The order of the map; -1 when <code>nside</code> is not a power of 2.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#order_max">order_max</a></span></code>
<div class="block">Maximum order parameter</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#scheme">scheme</a></span></code>
<div class="block">The ordering scheme.</div>
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<h3>Fields inherited from class healpix.essentials.<a href="../../healpix/essentials/HealpixTables.html" title="class in healpix.essentials">HealpixTables</a></h3>
<code><a href="../../healpix/essentials/HealpixTables.html#ctab">ctab</a>, <a href="../../healpix/essentials/HealpixTables.html#facearray">facearray</a>, <a href="../../healpix/essentials/HealpixTables.html#jpll">jpll</a>, <a href="../../healpix/essentials/HealpixTables.html#jrll">jrll</a>, <a href="../../healpix/essentials/HealpixTables.html#swap_cycle">swap_cycle</a>, <a href="../../healpix/essentials/HealpixTables.html#swaparray">swaparray</a>, <a href="../../healpix/essentials/HealpixTables.html#utab">utab</a>, <a href="../../healpix/essentials/HealpixTables.html#xoffset">xoffset</a>, <a href="../../healpix/essentials/HealpixTables.html#yoffset">yoffset</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#HealpixBase--">HealpixBase</a></span>()</code>
<div class="block">Initializes the object to Nside=1 and scheme=NESTED.</div>
</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#HealpixBase-long-healpix.essentials.Scheme-">HealpixBase</a></span>(long nside_in,
<a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme_in)</code>
<div class="block">Initializes the object to a user-supplied Nside and ordering scheme.</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ang2pix-healpix.essentials.Pointing-">ang2pix</a></span>(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> ptg)</code>
<div class="block">Returns the pixel which contains the supplied Pointing.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials">Vec3</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#boundaries-long-int-">boundaries</a></span>(long pix,
int step)</code>
<div class="block">Returns a set of points along the boundary of the given pixel.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#getNpix--">getNpix</a></span>()</code>
<div class="block">Returns the total number of pixels in the pixelisation.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#getNside--">getNside</a></span>()</code>
<div class="block">Returns the current Nside parameter.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#getOrder--">getOrder</a></span>()</code>
<div class="block">Returns the current order parameter.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#getScheme--">getScheme</a></span>()</code>
<div class="block">Returns the current ordering scheme.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#loc2pix-healpix.essentials.Hploc-">loc2pix</a></span>(healpix.essentials.Hploc loc)</code> </td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#maxPixrad--">maxPixrad</a></span>()</code>
<div class="block">Returns the maximum angular distance between a pixel center and its
corners.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>long[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#neighbours-long-">neighbours</a></span>(long ipix)</code>
<div class="block">Returns the neighboring pixels of ipix.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nest2ring-long-">nest2ring</a></span>(long ipnest)</code>
<div class="block">Returns ring pixel number for the supplied nested pixel number.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#npix2Nside-long-">npix2Nside</a></span>(long npix)</code>
<div class="block">Calculates the Nside parameter from the number of pixels.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nside2Npix-long-">nside2Npix</a></span>(long nside)</code>
<div class="block">Calculates the number of pixels from the Nside parameter.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#nside2order-long-">nside2order</a></span>(long nside)</code>
<div class="block">Calculates the map order from its Nside parameter.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#order2Npix-int-">order2Npix</a></span>(int order)</code>
<div class="block">Calculates the number of pixels from the order parameter.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#pix2ang-long-">pix2ang</a></span>(long pix)</code>
<div class="block">Returns the Pointing corresponding to the center of the supplied pixel.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>protected healpix.essentials.Hploc</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#pix2loc-long-">pix2loc</a></span>(long pix)</code> </td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#pix2ring-long-">pix2ring</a></span>(long pix)</code>
<div class="block">Compute ring index from pixel number.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code><a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials">Vec3</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#pix2vec-long-">pix2vec</a></span>(long pix)</code>
<div class="block">Returns the normalized 3-vector corresponding to the center of the
supplied pixel.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>protected <a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#pix2xyf-long-">pix2xyf</a></span>(long pix)</code> </td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code><a href="../../healpix/essentials/Zphi.html" title="class in healpix.essentials">Zphi</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#pix2zphi-long-">pix2zphi</a></span>(long pix)</code>
<div class="block">Returns the Zphi corresponding to the center of the supplied pixel.</div>
</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code><a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#queryDisc-healpix.essentials.Pointing-double-">queryDisc</a></span>(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> ptg,
double radius)</code>
<div class="block">Returns a range set of pixels whose centers lie within a given disk.</div>
</td>
</tr>
<tr id="i21" class="rowColor">
<td class="colFirst"><code><a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#queryDiscInclusive-healpix.essentials.Pointing-double-int-">queryDiscInclusive</a></span>(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> ptg,
double radius,
int fact)</code>
<div class="block">Returns a range set of pixels which overlap with a given disk.</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code><a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#queryPolygon-healpix.essentials.Pointing:A-">queryPolygon</a></span>(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a>[] vertex)</code>
<div class="block">Returns a range set of pixels whose centers lie within the convex
polygon defined by the <code>vertex</code> array.</div>
</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code><a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#queryPolygonInclusive-healpix.essentials.Pointing:A-int-">queryPolygonInclusive</a></span>(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a>[] vertex,
int fact)</code>
<div class="block">Returns a range set of pixels that overlap with the convex
polygon defined by the <code>vertex</code> array.</div>
</td>
</tr>
<tr id="i24" class="altColor">
<td class="colFirst"><code><a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#queryStrip-double-double-boolean-">queryStrip</a></span>(double theta1,
double theta2,
boolean inclusive)</code>
<div class="block">Returns a range set of pixels whose centers lie within a given latitude
range (if <code>inclusive==false</code>), or which overlap with this range
(if <code>inclusive==true</code>).</div>
</td>
</tr>
<tr id="i25" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ring2nest-long-">ring2nest</a></span>(long ipring)</code>
<div class="block">Returns nested pixel number for the supplied ring pixel number.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ring2theta-long-">ring2theta</a></span>(long ring)</code>
<div class="block">Returns the colatitude for the requested ring.</div>
</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>protected <a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ring2xyf-long-">ring2xyf</a></span>(long pix)</code> </td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#ring2z-long-">ring2z</a></span>(long ring)</code>
<div class="block">Returns the z-coordinate (equivalent to the cosine of the colatitude)
for the requested ring.</div>
</td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#setNside-long-">setNside</a></span>(long nside_in)</code>
<div class="block">Adjusts the object to nside_in.</div>
</td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#setNsideAndScheme-long-healpix.essentials.Scheme-">setNsideAndScheme</a></span>(long nside_in,
<a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme_in)</code>
<div class="block">Adjusts the object to nside_in and scheme_in.</div>
</td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#setScheme-healpix.essentials.Scheme-">setScheme</a></span>(<a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme_in)</code>
<div class="block">Adjusts the object to scheme.</div>
</td>
</tr>
<tr id="i32" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#vec2pix-healpix.essentials.Vec3-">vec2pix</a></span>(<a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials">Vec3</a> vec)</code>
<div class="block">Returns the pixel which contains the supplied Vec3.</div>
</td>
</tr>
<tr id="i33" class="rowColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#xyf2pix-healpix.essentials.HealpixBase.Xyf-">xyf2pix</a></span>(<a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a> xyf)</code> </td>
</tr>
<tr id="i34" class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#xyf2pix-int-int-int-">xyf2pix</a></span>(int ix,
int iy,
int face_num)</code> </td>
</tr>
<tr id="i35" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../healpix/essentials/HealpixBase.html#zphi2pix-healpix.essentials.Zphi-">zphi2pix</a></span>(<a href="../../healpix/essentials/Zphi.html" title="class in healpix.essentials">Zphi</a> zphi)</code>
<div class="block">Returns the pixel which contains the supplied Zphi.</div>
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<code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>public static final int order_max</pre>
<div class="block">Maximum order parameter</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../constant-values.html#healpix.essentials.HealpixBase.order_max">Constant Field Values</a></dd>
</dl>
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<pre>public static final long ns_max</pre>
<div class="block">Maximum Nside parameter; equivalent to 2^<code>order_max</code>.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../constant-values.html#healpix.essentials.HealpixBase.ns_max">Constant Field Values</a></dd>
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<h4>order</h4>
<pre>protected int order</pre>
<div class="block">The order of the map; -1 when <code>nside</code> is not a power of 2.</div>
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<pre>protected long nside</pre>
<div class="block">The Nside parameter.</div>
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<pre>protected long nl2</pre>
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<pre>protected long nl3</pre>
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<pre>protected long nl4</pre>
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<pre>protected long npface</pre>
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<pre>protected long npix</pre>
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<pre>protected long ncap</pre>
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<pre>protected double fact1</pre>
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<pre>protected double fact2</pre>
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<pre>protected <a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme</pre>
<div class="block">The ordering scheme.</div>
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<pre>public HealpixBase()</pre>
<div class="block">Initializes the object to Nside=1 and scheme=NESTED.</div>
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<pre>public HealpixBase(long nside_in,
<a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme_in)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Initializes the object to a user-supplied Nside and ordering scheme.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nside_in</code> - the Nside parameter</dd>
<dd><code>scheme_in</code> - the ordering scheme</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>protected <a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a> ring2xyf(long pix)</pre>
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<pre>protected <a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a> pix2xyf(long pix)</pre>
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<pre>protected long xyf2pix(int ix,
int iy,
int face_num)</pre>
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<pre>protected long xyf2pix(<a href="../../healpix/essentials/HealpixBase.Xyf.html" title="class in healpix.essentials">HealpixBase.Xyf</a> xyf)</pre>
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<pre>public static int nside2order(long nside)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Calculates the map order from its Nside parameter.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nside</code> - the Nside parameter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the map order corresponding to <code>nside</code>; -1 if
<code>nside</code> is not a power of 2.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public static long npix2Nside(long npix)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Calculates the Nside parameter from the number of pixels.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>npix</code> - the number of pixels</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the computed Nside parameter</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public static long nside2Npix(long nside)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Calculates the number of pixels from the Nside parameter.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nside</code> - the Nside parameter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the computed number of pixels</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public static long order2Npix(int order)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Calculates the number of pixels from the order parameter.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>order</code> - the order parameter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the computed number of pixels</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public void setNside(long nside_in)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Adjusts the object to nside_in.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nside_in</code> - the new Nside parameter</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public void setNsideAndScheme(long nside_in,
<a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme_in)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Adjusts the object to nside_in and scheme_in.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>nside_in</code> - the new Nside parameter</dd>
<dd><code>scheme_in</code> - the new ordering scheme</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public <a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> getScheme()</pre>
<div class="block">Returns the current ordering scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the current ordering scheme</dd>
</dl>
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<pre>public int getNside()</pre>
<div class="block">Returns the current Nside parameter.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the current Nside parameter</dd>
</dl>
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<pre>public long getNpix()</pre>
<div class="block">Returns the total number of pixels in the pixelisation.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the current total number of pixels</dd>
</dl>
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<pre>public void setScheme(<a href="../../healpix/essentials/Scheme.html" title="enum in healpix.essentials">Scheme</a> scheme_in)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Adjusts the object to scheme.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>scheme_in</code> - the new ordering scheme</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public int getOrder()</pre>
<div class="block">Returns the current order parameter.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the current map order parameter.</dd>
</dl>
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<pre>public long ang2pix(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> ptg)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns the pixel which contains the supplied Pointing.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ptg</code> - the requested location on the sphere.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the pixel number containing the location.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public <a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> pix2ang(long pix)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns the Pointing corresponding to the center of the supplied pixel.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pix</code> - the requested pixel number.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the pixel's center coordinates.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public long vec2pix(<a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials">Vec3</a> vec)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns the pixel which contains the supplied Vec3.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>vec</code> - the requested location on the sphere (need not be normalized).</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the pixel number containing the location.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public <a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials">Vec3</a> pix2vec(long pix)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns the normalized 3-vector corresponding to the center of the
supplied pixel.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pix</code> - the requested pixel number.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the pixel's center coordinates.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public long ring2nest(long ipring)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns nested pixel number for the supplied ring pixel number.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ipring</code> - the requested pixel number in RING scheme.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the corresponding pixel number in NESTED scheme.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public long nest2ring(long ipnest)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns ring pixel number for the supplied nested pixel number.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ipnest</code> - the requested pixel number in NESTED scheme.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the corresponding pixel number in RING scheme.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>protected long loc2pix(healpix.essentials.Hploc loc)</pre>
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<pre>public long zphi2pix(<a href="../../healpix/essentials/Zphi.html" title="class in healpix.essentials">Zphi</a> zphi)</pre>
<div class="block">Returns the pixel which contains the supplied Zphi.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>zphi</code> - the requested location on the sphere.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the pixel number containing the location.</dd>
</dl>
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<pre>protected healpix.essentials.Hploc pix2loc(long pix)</pre>
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<pre>public <a href="../../healpix/essentials/Zphi.html" title="class in healpix.essentials">Zphi</a> pix2zphi(long pix)</pre>
<div class="block">Returns the Zphi corresponding to the center of the supplied pixel.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pix</code> - the requested pixel number.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the pixel's center coordinates.</dd>
</dl>
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<pre>public long[] neighbours(long ipix)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns the neighboring pixels of ipix.
This method works in both RING and NEST schemes, but is
considerably faster in the NEST scheme.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ipix</code> - the requested pixel number.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>array with indices of the neighboring pixels.
The returned array contains (in this order)
the pixel numbers of the SW, W, NW, N, NE, E, SE and S neighbor
of ipix. If a neighbor does not exist (this can only happen
for the W, N, E and S neighbors), its entry is set to -1.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>public double maxPixrad()</pre>
<div class="block">Returns the maximum angular distance between a pixel center and its
corners.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>maximum angular distance between a pixel center and its
corners.</dd>
</dl>
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<pre>public double ring2z(long ring)</pre>
<div class="block">Returns the z-coordinate (equivalent to the cosine of the colatitude)
for the requested ring.
This method also accepts the not-really-existing ring indices 0 and
4*Nside, which correspond to North and South Poles, respectively.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ring</code> - ring index: the northernmost ring in the map has index 1;
ring indices are increasing towards the South pole.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>z-coordinate of the ring.</dd>
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<pre>public double ring2theta(long ring)</pre>
<div class="block">Returns the colatitude for the requested ring.
This method also accepts the not-really-existing ring indices 0 and
4*Nside, which correspond to North and South Poles, respectively.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ring</code> - ring index: the northernmost ring in the map has index 1;
ring indices are increasing towards the South pole.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>z-coordinate of the ring.</dd>
</dl>
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<pre>public <a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a> queryStrip(double theta1,
double theta2,
boolean inclusive)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns a range set of pixels whose centers lie within a given latitude
range (if <code>inclusive==false</code>), or which overlap with this range
(if <code>inclusive==true</code>).<p>
The latitude range is defined as follows:
<ul>
<li>if <code>theta1<theta2</code>, it is the range between <code>theta1</code>
and <code>theta2</code></li>
<li>otherwise it is the range between 0 and <code>theta2</code>, and between
<code>theta1</code> and pi.</li>
</ul>
This method currently only works in the RING scheme.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
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<pre>public <a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a> queryDisc(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> ptg,
double radius)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns a range set of pixels whose centers lie within a given disk. <p>
This method is more efficient in the RING scheme.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ptg</code> - the angular coordinates of the disk center</dd>
<dd><code>radius</code> - the radius (in radians) of the disk</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the requested set of pixel number ranges</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
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<pre>public <a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a> queryDiscInclusive(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a> ptg,
double radius,
int fact)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns a range set of pixels which overlap with a given disk. <p>
This method is more efficient in the RING scheme. <p>
This method may return some pixels which don't overlap with
the polygon at all. The higher <code>fact</code> is chosen, the fewer false
positives are returned, at the cost of increased run time.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ptg</code> - the angular coordinates of the disk center</dd>
<dd><code>radius</code> - the radius (in radians) of the disk</dd>
<dd><code>fact</code> - The overlapping test will be done at the resolution
<code>fact*nside</code>. For NESTED ordering, <code>fact</code> must be a power
of 2, else it can be any positive integer. A typical choice would be 4.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the requested set of pixel number ranges</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
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<pre>public <a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a> queryPolygon(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a>[] vertex)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns a range set of pixels whose centers lie within the convex
polygon defined by the <code>vertex</code> array. <p>
This method is more efficient in the RING scheme.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>vertex</code> - an array containing the vertices of the requested convex
polygon.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the requested set of pixel number ranges</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
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<pre>public <a href="../../healpix/essentials/RangeSet.html" title="class in healpix.essentials">RangeSet</a> queryPolygonInclusive(<a href="../../healpix/essentials/Pointing.html" title="class in healpix.essentials">Pointing</a>[] vertex,
int fact)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns a range set of pixels that overlap with the convex
polygon defined by the <code>vertex</code> array. <p>
This method is more efficient in the RING scheme.<p>
This method may return some pixels which don't overlap with
the polygon at all. The higher <code>fact</code> is chosen, the fewer false
positives are returned, at the cost of increased run time.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>vertex</code> - an array containing the vertices of the requested convex
polygon.</dd>
<dd><code>fact</code> - The overlapping test will be done at the resolution
<code>fact*nside</code>. For NESTED ordering, <code>fact</code> must be a power
of 2, else it can be any positive integer. A typical choice would be 4.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the requested set of pixel number ranges</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
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<pre>public long pix2ring(long pix)</pre>
<div class="block">Compute ring index from pixel number.
Works in both RING and NESTED schemes</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pix</code> - pixel number</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>ring index (1 to 4Nside-1)</dd>
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<pre>public <a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials">Vec3</a>[] boundaries(long pix,
int step)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns a set of points along the boundary of the given pixel.
Step 1 gives 4 points on the corners. The first point corresponds
to the northernmost corner, the subsequent points follow the pixel
boundary through west, south and east corners.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pix</code> - pixel index number</dd>
<dd><code>step</code> - the number of returned points is 4*step</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><a href="../../healpix/essentials/Vec3.html" title="class in healpix.essentials"><code>Vec3</code></a> for each point</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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