coolaj86/s2-geometry.js
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use correct starting square for face #6 #8 #9

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This commit is contained in:
AJ ONeal 2016-08-03 00:04:26 -06:00
parent e04b0b0ecd
commit 68274eb677
2 changed files with 70 additions and 39 deletions
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26
src/s2geometry.js
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@ -186,7 +186,7 @@ S2.IJToST = function(ij,order,offsets) {
// note: rather then calculating the final integer hilbert position, we just return the list of quads // note: rather then calculating the final integer hilbert position, we just return the list of quads
// this ensures no precision issues whth large orders (S3 cell IDs use up to 30), and is more // this ensures no precision issues whth large orders (S3 cell IDs use up to 30), and is more
// convenient for pulling out the individual bits as needed later // convenient for pulling out the individual bits as needed later
var pointToHilbertQuadList = function(x,y,order) { var pointToHilbertQuadList = function(x,y,order,sq) {
var hilbertMap = { var hilbertMap = {
'a': [ [0,'d'], [1,'a'], [3,'b'], [2,'a'] ], 'a': [ [0,'d'], [1,'a'], [3,'b'], [2,'a'] ],
'b': [ [2,'b'], [1,'b'], [3,'a'], [0,'c'] ], 'b': [ [2,'b'], [1,'b'], [3,'a'], [0,'c'] ],
@ -194,7 +194,7 @@ var pointToHilbertQuadList = function(x,y,order) {
'd': [ [0,'a'], [3,'c'], [1,'d'], [2,'d'] ] 'd': [ [0,'a'], [3,'c'], [1,'d'], [2,'d'] ]
}; };
var currentSquare='a'; var currentSquare=sq||'a';
var positions = []; var positions = [];
for (var i=order-1; i>=0; i--) { for (var i=order-1; i>=0; i--) {
@ -286,7 +286,27 @@ S2.S2Cell.prototype.getCornerLatLngs = function() {
S2.S2Cell.prototype.getFaceAndQuads = function () { S2.S2Cell.prototype.getFaceAndQuads = function () {
var quads = pointToHilbertQuadList(this.ij[0], this.ij[1], this.level); var sq;
switch(this.face) {
case 0:
/* fallthru */
case 2:
/* fallthru */
case 4:
sq = 'a';
break;
case 1:
/* fallthru */
case 3:
/* fallthru */
case 5:
sq = 'd';
break;
}
var quads = pointToHilbertQuadList(this.ij[0], this.ij[1], this.level, sq);
return [this.face,quads]; return [this.face,quads];
}; };

83
tests/debug.js
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@ -8,43 +8,54 @@ var lat = -43.525166;
var lng = 172.655096; var lng = 172.655096;
//var id = '8678661352471920640'; //var id = '8678661352471920640';
console.log(''); var tests = [
console.log('Lat/Lng'); [ -13.846153846153854, -41.53846153846155 ] // face 0
console.log('=', lat + ',' + lng); , [ -13.846153846153854, 96.92307692307692 ] // face 1
, [ 41.53846153846153, -124.61538461538463 ] // face 2
, [ -152.30769230769232, 41.53846153846153 ] // face 3
, [ -152.30769230769232, 69.23076923076923 ] // face 4
, [ -124.61538461538463, -69.23076923076924 ] // face 5
];
// tests.forEach(function (pair, i) {
// Lat / Lng to XYZ var lat = pair[0];
// var lng = pair[1];
var nS2LatLng = new nS2.S2LatLng(lat, lng).toPoint();
var nXyz = [ nS2LatLng.x(), nS2LatLng.y(), nS2LatLng.z() ]; console.log('');
//var oXyz = oS2.LatLngToXYZ({ lat: lat, lng: lng }); console.log('');
var jXyz = jS2.LatLngToXYZ({ lat: lat, lng: lng }); console.log('FACE', i);
console.log('');
console.log('XYZ'); console.log('');
console.log('=', nXyz); console.log('Lat/Lng');
//console.log('o', oXyz); console.log('=', lat + ',' + lng);
console.log('j', jXyz);
//
// Lat / Lng to XYZ
//
var nS2LatLng = new nS2.S2LatLng(lat, lng).toPoint();
//var nXyz = [ nS2LatLng.x(), nS2LatLng.y(), nS2LatLng.z() ];
//var jXyz = jS2.LatLngToXYZ({ lat: lat, lng: lng });
/*
console.log('');
console.log('XYZ');
console.log('=', nXyz);
console.log('j', jXyz);
*/
var nCell = new nS2.S2CellId(nS2LatLng).parent(15); var nCell = new nS2.S2CellId(nS2LatLng).parent(15);
//var oCell = oS2.S2Cell.FromLatLng({ lat: lat, lng: lng }, 15); var jCell = jS2.S2Cell.FromLatLng({ lat: lat, lng: lng }, 15);
var jCell = jS2.S2Cell.FromLatLng({ lat: lat, lng: lng }, 15); /*
console.log(''); console.log('');
console.log('F,IJ,L'); console.log('F,IJ,L');
//console.log('=', cellN); console.log('j', jCell.toString());
//console.log('o', oCell.toString()); */
console.log('j', jCell.toString());
var nKey = nCell.toString(); var nKey = nCell.toString();
//var oQuad = oCell.getFaceAndQuads(); var jQuad = jCell.getFaceAndQuads();
//var oKey = oQuad[0] + '/' + oQuad[1].join(''); var jKey = jQuad[0] + '/' + jQuad[1].join('');
var jQuad = jCell.getFaceAndQuads(); console.log('');
var jKey = jQuad[0] + '/' + jQuad[1].join(''); console.log('Quadkey');
console.log(''); console.log('=', nKey);
console.log('Quadkey'); console.log('j', jKey);
console.log('=', nKey); });
//console.log('o', oKey);
console.log('j', jKey);
//var nCellId = new nS2.S2CellId(id);
//console.log(nCellId.toLatLng().toString());