21 lines
729 B
JavaScript
21 lines
729 B
JavaScript
goog.provide('ol.geom.flat.topology');
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goog.require('ol.geom.flat.area');
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/**
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* Check if the linestring is a boundary.
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* @param {Array.<number>} flatCoordinates Flat coordinates.
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* @param {number} offset Offset.
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* @param {number} end End.
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* @param {number} stride Stride.
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* @return {boolean} The linestring is a boundary.
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*/
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ol.geom.flat.topology.lineStringIsClosed = function(flatCoordinates, offset, end, stride) {
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var lastCoord = end - stride;
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if (flatCoordinates[offset] === flatCoordinates[lastCoord] &&
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flatCoordinates[offset + 1] === flatCoordinates[lastCoord + 1] && (end - offset) / stride > 3) {
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return !!ol.geom.flat.area.linearRing(flatCoordinates, offset, end, stride);
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}
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return false;
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};
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