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41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
/* Copyright (c) 2015 Jean-Marc VIGLINO,
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released under the CeCILL-B license (French BSD license)
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(http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt).
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*/
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/** Ordering function for ol.layer.Vector renderOrder parameter
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* ol.ordering.fn (options)
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* @param {object}
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* @return ordering function (f0,f1)
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*/
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ol.ordering = {}
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/** y-Ordering
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* @return ordering function (f0,f1)
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*/
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ol.ordering.yOrdering = function(options)
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{ return function(f0,f1)
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{ return f0.getGeometry().getExtent()[1] < f1.getGeometry().getExtent()[1] ;
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};
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}
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/** Order with a feature attribute
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* @param option
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* attribute: ordering attribute, default zIndex
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* equalFn: ordering function for equal values
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* @return ordering function (f0,f1)
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*/
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ol.ordering.zIndex = function(options)
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{ if (!options) options = {};
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var attr = options.attribute || 'zIndex';
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if (option.equalFn)
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{ return function(f0,f1)
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{ if (f0.get(attr) == f1.get(attr)) return option.equalFn(f0,f1);
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return f0.get(attr) < f1.get(attr);
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};
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}
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else
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{ return function(f0,f1)
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{ return f0.get(attr) < f1.get(attr);
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};
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}
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} |