LSST Applications 27.0.0,g0265f82a02+469cd937ee,g02d81e74bb+21ad69e7e1,g1470d8bcf6+cbe83ee85a,g2079a07aa2+e67c6346a6,g212a7c68fe+04a9158687,g2305ad1205+94392ce272,g295015adf3+81dd352a9d,g2bbee38e9b+469cd937ee,g337abbeb29+469cd937ee,g3939d97d7f+72a9f7b576,g487adcacf7+71499e7cba,g50ff169b8f+5929b3527e,g52b1c1532d+a6fc98d2e7,g591dd9f2cf+df404f777f,g5a732f18d5+be83d3ecdb,g64a986408d+21ad69e7e1,g858d7b2824+21ad69e7e1,g8a8a8dda67+a6fc98d2e7,g99cad8db69+f62e5b0af5,g9ddcbc5298+d4bad12328,ga1e77700b3+9c366c4306,ga8c6da7877+71e4819109,gb0e22166c9+25ba2f69a1,gb6a65358fc+469cd937ee,gbb8dafda3b+69d3c0e320,gc07e1c2157+a98bf949bb,gc120e1dc64+615ec43309,gc28159a63d+469cd937ee,gcf0d15dbbd+72a9f7b576,gdaeeff99f8+a38ce5ea23,ge6526c86ff+3a7c1ac5f1,ge79ae78c31+469cd937ee,gee10cc3b42+a6fc98d2e7,gf1cff7945b+21ad69e7e1,gfbcc870c63+9a11dc8c8f
LSST Data Management Base Package
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Public Member Functions | |
__init__ (self) | |
xy2hash (self, x, y) | |
ij2hash (self, i, j) | |
i02hash (self, i) | |
hash2ij (self, h) | |
hash2i0 (self, _hash) | |
ij2i (self, ij) | |
ij2j (self, ij) | |
Static Public Attributes | |
LUPT_TO_HASH | |
LUPT_TO_IJ_INT | |
Z-Order 2D curve for 32-bit integer values. Code is ported from AladinSrc.jar version 11.024, ZOrderCurve2DImpls.java. AladinSrc.jar is licensed with GPLv3, see http://aladin.u-strasbg.fr/COPYING From the original documentation: "Z-Order Curve (ZOC) implementation in which the vertical coordinate carry the most significant bit (VMSB). This implementation is based on a lookup table (LOOKUP). We assume that each discritized coordinates is coded on maximum 32 bits (INT)."
Definition at line 217 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.__init__ | ( | self | ) |
Definition at line 303 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.hash2i0 | ( | self, | |
_hash ) |
Special case of hash2ij in which the discretized coordinate along the vertical axis is zero. Parameters ---------- _hash : `int` Space-filling hash value. Returns ------- ij : `np.int64` Single value from which 2d coordinates can be extracted.
Definition at line 412 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.hash2ij | ( | self, | |
h ) |
Transforms the given space-filling hash value into a single value from which the 2d coordinates can be extracted using ij2i and ij2j. Parameters ---------- h : `int` Space-filling hash value Returns ------- ij : `np.int64` Single value from which 2d coordinates can be extracted.
Definition at line 371 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.i02hash | ( | self, | |
i ) |
Special case of ij2hash in which the discretized coordinate along the vertical axis equals zero. Parameters ---------- i : `int` i discretized coordinate along the horizontal axis. Must fit within the 32-bit integer range. Returns ------- hash : `numpy.int64` The space-filling hash value associated with the given coordinate.
Definition at line 348 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.ij2hash | ( | self, | |
i, | |||
j ) |
Compute the hash value from discretized i, j. Parameters ---------- i : `int` i discretized coordinate along the horizontal axis. Must fit within the 32-bit integer range. j : `int` j discretized coordinate along the vertical axis. Must fit within the 32-bit integer range. Returns ------- hash : `numpy.int64` The space-filling hash value associated with the given coordinates.
Definition at line 327 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.ij2i | ( | self, | |
ij ) |
Extract the discretized horizontal coordinate from hash2ij. Parameters ---------- ij : `int` The ij result of hash2ij. Returns ------- i : `np.int32` Discretized horizontal coordinate stored in ij.
Definition at line 430 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.ij2j | ( | self, | |
ij ) |
Extract the discretized vertical coordinate from hash2ij. Parameters ---------- ij : `int` The ij result of hash2ij. Returns ------- j : `np.int32` Discretized vertical coordinate stored in ij.
Definition at line 446 of file _hpxUtils.py.
lsst.afw.geom._hpxUtils._ZOrderCurve2DInt.xy2hash | ( | self, | |
x, | |||
y ) |
Compute the hash value from x/y. Parameters ---------- x : `float` x coordinate along the horizontal axis. Must fit within the 32-bit integer range. y : `float` y coordinate along the vertical axis. Must fit within the 32-bit integer range. Returns ------- hash : `numpy.int64` The space-filling hash value associated with the given coordinates.
Definition at line 306 of file _hpxUtils.py.
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static |
Definition at line 232 of file _hpxUtils.py.
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static |
Definition at line 258 of file _hpxUtils.py.