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Merge pull request #1560 from twpayne/hide-oriented-rings

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Hide oriented rings
This commit is contained in:
Tom Payne
2014-01-21 11:40:40 -08:00
parent 0971dad122 d39a5cec75
commit 913038a124
6 changed files with 252 additions and 83 deletions
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45
src/ol/geom/flatgeom.js
View File

@@ -546,6 +546,51 @@ ol.geom.flat.linearRingsGetInteriorPoint =
};
/**
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.
* @param {Array.<number>} ends Ends.
* @param {number} stride Stride.
* @return {boolean} `true` if all rings are correctly oriented, `false`
* otherwise.
*/
ol.geom.flat.linearRingsAreOriented =
function(flatCoordinates, offset, ends, stride) {
var i, ii;
for (i = 0, ii = ends.length; i < ii; ++i) {
var end = ends[i];
var isClockwise = ol.geom.flat.linearRingIsClockwise(
flatCoordinates, offset, end, stride);
if (i === 0 ? !isClockwise : isClockwise) {
return false;
}
offset = end;
}
return true;
};
/**
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.
* @param {Array.<Array.<number>>} endss Endss.
* @param {number} stride Stride.
* @return {boolean} `true` if all rings are correctly oriented, `false`
* otherwise.
*/
ol.geom.flat.linearRingssAreOriented =
function(flatCoordinates, offset, endss, stride) {
var i, ii;
for (i = 0, ii = endss.length; i < ii; ++i) {
if (!ol.geom.flat.linearRingsAreOriented(
flatCoordinates, offset, endss[i], stride)) {
return false;
}
}
return true;
};
/**
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.

58
src/ol/geom/multipolygon.js
View File

@@ -50,6 +50,18 @@ ol.geom.MultiPolygon = function(coordinates, opt_layout) {
*/
this.maxDeltaRevision_ = -1;
/**
* @private
* @type {number}
*/
this.orientedRevision_ = -1;
/**
* @private
* @type {Array.<number>}
*/
this.orientedFlatCoordinates_ = null;
this.setCoordinates(coordinates, opt_layout);
};
@@ -82,7 +94,7 @@ ol.geom.MultiPolygon.prototype.closestPointXY =
this.maxDeltaRevision_ = this.getRevision();
}
return ol.geom.closest.getssClosestPoint(
this.flatCoordinates, 0, this.endss_, this.stride,
this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,
this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);
};
@@ -92,7 +104,7 @@ ol.geom.MultiPolygon.prototype.closestPointXY =
*/
ol.geom.MultiPolygon.prototype.containsXY = function(x, y) {
return ol.geom.flat.linearRingssContainsXY(
this.flatCoordinates, 0, this.endss_, this.stride, x, y);
this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, x, y);
};
@@ -101,7 +113,7 @@ ol.geom.MultiPolygon.prototype.containsXY = function(x, y) {
*/
ol.geom.MultiPolygon.prototype.getArea = function() {
return ol.geom.flat.linearRingssArea(
this.flatCoordinates, 0, this.endss_, this.stride);
this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride);
};
@@ -130,13 +142,33 @@ ol.geom.MultiPolygon.prototype.getInteriorPoints = function() {
var ys = ol.geom.flat.linearRingssMidYs(
this.flatCoordinates, 0, this.endss_, this.stride);
this.interiorPoints_ = ol.geom.flat.linearRingssGetInteriorPoints(
this.flatCoordinates, 0, this.endss_, this.stride, ys);
this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, ys);
this.interiorPointsRevision_ = this.getRevision();
}
return this.interiorPoints_;
};
/**
* @return {Array.<number>} Oriented flat coordinates.
*/
ol.geom.MultiPolygon.prototype.getOrientedFlatCoordinates = function() {
if (this.orientedRevision_ != this.getRevision()) {
var flatCoordinates = this.flatCoordinates;
if (ol.geom.flat.linearRingssAreOriented(
flatCoordinates, 0, this.endss_, this.stride)) {
this.orientedFlatCoordinates_ = flatCoordinates;
} else {
this.orientedFlatCoordinates_ = flatCoordinates.slice();
this.orientedFlatCoordinates_.length = ol.geom.flat.orientLinearRingss(
this.orientedFlatCoordinates_, 0, this.endss_, this.stride);
}
this.orientedRevision_ = this.getRevision();
}
return this.orientedFlatCoordinates_;
};
/**
* @inheritDoc
*/
@@ -159,12 +191,20 @@ ol.geom.MultiPolygon.prototype.getSimplifiedGeometryInternal =
* @return {Array.<ol.geom.Polygon>} Polygons.
*/
ol.geom.MultiPolygon.prototype.getPolygons = function() {
// FIXME we should construct the polygons directly from the flat coordinates
var coordinates = this.getCoordinates();
var layout = this.layout;
var flatCoordinates = this.flatCoordinates;
var endss = this.endss_;
var polygons = [];
var offset = 0;
var i, ii;
for (i = 0, ii = coordinates.length; i < ii; ++i) {
polygons.push(new ol.geom.Polygon(coordinates[i]));
for (i = 0, ii = endss.length; i < ii; ++i) {
var ends = endss[i];
var end = ends[ends.length - 1];
var polygon = new ol.geom.Polygon(null);
polygon.setFlatCoordinates(
layout, flatCoordinates.slice(offset, end), ends.slice());
polygons.push(polygon);
offset = end;
}
return polygons;
};
@@ -196,8 +236,6 @@ ol.geom.MultiPolygon.prototype.setCoordinates =
var lastEnds = endss[endss.length - 1];
this.flatCoordinates.length = lastEnds.length === 0 ?
0 : lastEnds[lastEnds.length - 1];
ol.geom.flat.orientLinearRingss(
this.flatCoordinates, 0, this.endss_, this.stride);
this.dispatchChangeEvent();
}
};

53
src/ol/geom/polygon.js
View File

@@ -50,6 +50,18 @@ ol.geom.Polygon = function(coordinates, opt_layout) {
*/
this.maxDeltaRevision_ = -1;
/**
* @private
* @type {number}
*/
this.orientedRevision_ = -1;
/**
* @private
* @type {Array.<number>}
*/
this.orientedFlatCoordinates_ = null;
this.setCoordinates(coordinates, opt_layout);
};
@@ -92,7 +104,7 @@ ol.geom.Polygon.prototype.closestPointXY =
*/
ol.geom.Polygon.prototype.containsXY = function(x, y) {
return ol.geom.flat.linearRingsContainsXY(
this.flatCoordinates, 0, this.ends_, this.stride, x, y);
this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, x, y);
};
@@ -101,7 +113,7 @@ ol.geom.Polygon.prototype.containsXY = function(x, y) {
*/
ol.geom.Polygon.prototype.getArea = function() {
return ol.geom.flat.linearRingsArea(
this.flatCoordinates, 0, this.ends_, this.stride);
this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride);
};
@@ -130,7 +142,7 @@ ol.geom.Polygon.prototype.getInteriorPoint = function() {
var extent = this.getExtent();
var y = (extent[1] + extent[3]) / 2;
this.interiorPoint_ = ol.geom.flat.linearRingsGetInteriorPoint(
this.flatCoordinates, 0, this.ends_, this.stride, y);
this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, y);
this.interiorPointRevision_ = this.getRevision();
}
return this.interiorPoint_;
@@ -141,16 +153,43 @@ ol.geom.Polygon.prototype.getInteriorPoint = function() {
* @return {Array.<ol.geom.LinearRing>} Linear rings.
*/
ol.geom.Polygon.prototype.getLinearRings = function() {
var layout = this.layout;
var flatCoordinates = this.flatCoordinates;
var ends = this.ends_;
var linearRings = [];
var coordinates = this.getCoordinates();
var offset = 0;
var i, ii;
for (i = 0, ii = coordinates.length; i < ii; ++i) {
linearRings.push(new ol.geom.LinearRing(coordinates[i]));
for (i = 0, ii = ends.length; i < ii; ++i) {
var end = ends[i];
var linearRing = new ol.geom.LinearRing(null);
linearRing.setFlatCoordinates(layout, flatCoordinates.slice(offset, end));
linearRings.push(linearRing);
offset = end;
}
return linearRings;
};
/**
* @return {Array.<number>} Oriented flat coordinates.
*/
ol.geom.Polygon.prototype.getOrientedFlatCoordinates = function() {
if (this.orientedRevision_ != this.getRevision()) {
var flatCoordinates = this.flatCoordinates;
if (ol.geom.flat.linearRingsAreOriented(
flatCoordinates, 0, this.ends_, this.stride)) {
this.orientedFlatCoordinates_ = flatCoordinates;
} else {
this.orientedFlatCoordinates_ = flatCoordinates.slice();
this.orientedFlatCoordinates_.length = ol.geom.flat.orientLinearRings(
this.orientedFlatCoordinates_, 0, this.ends_, this.stride);
}
this.orientedRevision_ = this.getRevision();
}
return this.orientedFlatCoordinates_;
};
/**
* @inheritDoc
*/
@@ -192,8 +231,6 @@ ol.geom.Polygon.prototype.setCoordinates = function(coordinates, opt_layout) {
var ends = ol.geom.flat.deflateCoordinatess(
this.flatCoordinates, 0, coordinates, this.stride, this.ends_);
this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];
ol.geom.flat.orientLinearRings(
this.flatCoordinates, 0, this.ends_, this.stride);
this.dispatchChangeEvent();
}
};

4
src/ol/render/canvas/canvasreplay.js
View File

@@ -1096,7 +1096,7 @@ ol.render.canvas.PolygonReplay.prototype.drawPolygonGeometry =
state.miterLimit, state.lineDash]);
}
var ends = polygonGeometry.getEnds();
var flatCoordinates = polygonGeometry.getFlatCoordinates();
var flatCoordinates = polygonGeometry.getOrientedFlatCoordinates();
var stride = polygonGeometry.getStride();
this.drawFlatCoordinatess_(flatCoordinates, 0, ends, stride);
this.endGeometry(polygonGeometry, data);
@@ -1132,7 +1132,7 @@ ol.render.canvas.PolygonReplay.prototype.drawMultiPolygonGeometry =
state.miterLimit, state.lineDash]);
}
var endss = multiPolygonGeometry.getEndss();
var flatCoordinates = multiPolygonGeometry.getFlatCoordinates();
var flatCoordinates = multiPolygonGeometry.getOrientedFlatCoordinates();
var stride = multiPolygonGeometry.getStride();
var offset = 0;
var i, ii;