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Factor out ol.geom.flat.center

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This commit is contained in:
Tom Payne
2014-03-12 13:22:19 +01:00
parent ca44c6328c
commit 48af6ecd1c
3 changed files with 28 additions and 26 deletions
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26
src/ol/geom/flat/centerflatgeom.js Normal file
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@@ -0,0 +1,26 @@
goog.provide('ol.geom.flat.center');
goog.require('ol.extent');
/**
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.
* @param {Array.<Array.<number>>} endss Endss.
* @param {number} stride Stride.
* @return {Array.<number>} Flat centers.
*/
ol.geom.flat.center.linearRingss =
function(flatCoordinates, offset, endss, stride) {
var flatCenters = [];
var i, ii;
var extent = ol.extent.createEmpty();
for (i = 0, ii = endss.length; i < ii; ++i) {
var ends = endss[i];
extent = ol.extent.createOrUpdateFromFlatCoordinates(
flatCoordinates, offset, ends[0], stride);
flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);
offset = ends[ends.length - 1];
}
return flatCenters;
};

25
src/ol/geom/flatgeom.js
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@@ -1,26 +1 @@
goog.provide('ol.geom.flat');
goog.require('ol.extent');
/**
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.
* @param {Array.<Array.<number>>} endss Endss.
* @param {number} stride Stride.
* @return {Array.<number>} Flat centers.
*/
ol.geom.flat.linearRingssGetFlatCenters =
function(flatCoordinates, offset, endss, stride) {
var flatCenters = [];
var i, ii;
var extent = ol.extent.createEmpty();
for (i = 0, ii = endss.length; i < ii; ++i) {
var ends = endss[i];
extent = ol.extent.createOrUpdateFromFlatCoordinates(
flatCoordinates, offset, ends[0], stride);
flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);
offset = ends[ends.length - 1];
}
return flatCenters;
};

3
src/ol/geom/multipolygon.js
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@@ -9,6 +9,7 @@ goog.require('ol.geom.Polygon');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.area');
goog.require('ol.geom.flat.center');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.flat.contains');
goog.require('ol.geom.flat.deflate');
@@ -176,7 +177,7 @@ ol.geom.MultiPolygon.prototype.getEndss = function() {
*/
ol.geom.MultiPolygon.prototype.getFlatInteriorPoints = function() {
if (this.flatInteriorPointsRevision_ != this.getRevision()) {
var flatCenters = ol.geom.flat.linearRingssGetFlatCenters(
var flatCenters = ol.geom.flat.center.linearRingss(
this.flatCoordinates, 0, this.endss_, this.stride);
this.flatInteriorPoints_ = ol.geom.flat.interiorpoint.linearRingss(
this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,