Move flat geom files so they are named like their provides

src/ol/geom/flat/interiorpoint.js

@@ -0,0 +1,92 @@
+goog.provide('ol.geom.flat.interiorpoint');
+
+goog.require('ol.array');
+goog.require('ol.geom.flat.contains');
+
+
+/**
+ * Calculates a point that is likely to lie in the interior of the linear rings.
+ * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.
+ * @param {Array.<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {Array.<number>} ends Ends.
+ * @param {number} stride Stride.
+ * @param {Array.<number>} flatCenters Flat centers.
+ * @param {number} flatCentersOffset Flat center offset.
+ * @param {Array.<number>=} opt_dest Destination.
+ * @return {Array.<number>} Destination.
+ */
+ol.geom.flat.interiorpoint.linearRings = function(flatCoordinates, offset,
+    ends, stride, flatCenters, flatCentersOffset, opt_dest) {
+  var i, ii, x, x1, x2, y1, y2;
+  var y = flatCenters[flatCentersOffset + 1];
+  /** @type {Array.<number>} */
+  var intersections = [];
+  // Calculate intersections with the horizontal line
+  var end = ends[0];
+  x1 = flatCoordinates[end - stride];
+  y1 = flatCoordinates[end - stride + 1];
+  for (i = offset; i < end; i += stride) {
+    x2 = flatCoordinates[i];
+    y2 = flatCoordinates[i + 1];
+    if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {
+      x = (y - y1) / (y2 - y1) * (x2 - x1) + x1;
+      intersections.push(x);
+    }
+    x1 = x2;
+    y1 = y2;
+  }
+  // Find the longest segment of the horizontal line that has its center point
+  // inside the linear ring.
+  var pointX = NaN;
+  var maxSegmentLength = -Infinity;
+  intersections.sort(ol.array.numberSafeCompareFunction);
+  x1 = intersections[0];
+  for (i = 1, ii = intersections.length; i < ii; ++i) {
+    x2 = intersections[i];
+    var segmentLength = Math.abs(x2 - x1);
+    if (segmentLength > maxSegmentLength) {
+      x = (x1 + x2) / 2;
+      if (ol.geom.flat.contains.linearRingsContainsXY(
+          flatCoordinates, offset, ends, stride, x, y)) {
+        pointX = x;
+        maxSegmentLength = segmentLength;
+      }
+    }
+    x1 = x2;
+  }
+  if (isNaN(pointX)) {
+    // There is no horizontal line that has its center point inside the linear
+    // ring.  Use the center of the the linear ring's extent.
+    pointX = flatCenters[flatCentersOffset];
+  }
+  if (opt_dest) {
+    opt_dest.push(pointX, y);
+    return opt_dest;
+  } else {
+    return [pointX, y];
+  }
+};
+
+
+/**
+ * @param {Array.<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {Array.<Array.<number>>} endss Endss.
+ * @param {number} stride Stride.
+ * @param {Array.<number>} flatCenters Flat centers.
+ * @return {Array.<number>} Interior points.
+ */
+ol.geom.flat.interiorpoint.linearRingss = function(flatCoordinates, offset, endss, stride, flatCenters) {
+  goog.DEBUG && console.assert(2 * endss.length == flatCenters.length,
+      'endss.length times 2 should be flatCenters.length');
+  var interiorPoints = [];
+  var i, ii;
+  for (i = 0, ii = endss.length; i < ii; ++i) {
+    var ends = endss[i];
+    interiorPoints = ol.geom.flat.interiorpoint.linearRings(flatCoordinates,
+        offset, ends, stride, flatCenters, 2 * i, interiorPoints);
+    offset = ends[ends.length - 1];
+  }
+  return interiorPoints;
+};