ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Transformed

Browse Source
This commit is contained in:
Tim Schaub
2017-12-11 16:29:33 -07:00
parent 1cdb6a66f0
commit 7f47883c48
737 changed files with 22216 additions and 21609 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/ol/geom/flat/simplify.js
+29 -26
View File
@@ -1,3 +1,6 @@
/**
* @module ol/geom/flat/simplify
*/
// Based on simplify-js https://github.com/mourner/simplify-js
// Copyright (c) 2012, Vladimir Agafonkin
// All rights reserved.
@@ -24,9 +27,8 @@
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
goog.provide('ol.geom.flat.simplify');
goog.require('ol.math');
import _ol_math_ from '../../math.js';
var _ol_geom_flat_simplify_ = {};
/**
@@ -40,19 +42,19 @@ goog.require('ol.math');
* coordinates.
* @return {Array.<number>} Simplified line string.
*/
ol.geom.flat.simplify.lineString = function(flatCoordinates, offset, end,
_ol_geom_flat_simplify_.lineString = function(flatCoordinates, offset, end,
stride, squaredTolerance, highQuality, opt_simplifiedFlatCoordinates) {
var simplifiedFlatCoordinates = opt_simplifiedFlatCoordinates !== undefined ?
opt_simplifiedFlatCoordinates : [];
if (!highQuality) {
end = ol.geom.flat.simplify.radialDistance(flatCoordinates, offset, end,
end = _ol_geom_flat_simplify_.radialDistance(flatCoordinates, offset, end,
stride, squaredTolerance,
simplifiedFlatCoordinates, 0);
flatCoordinates = simplifiedFlatCoordinates;
offset = 0;
stride = 2;
}
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeucker(
simplifiedFlatCoordinates.length = _ol_geom_flat_simplify_.douglasPeucker(
flatCoordinates, offset, end, stride, squaredTolerance,
simplifiedFlatCoordinates, 0);
return simplifiedFlatCoordinates;
@@ -70,7 +72,7 @@ ol.geom.flat.simplify.lineString = function(flatCoordinates, offset, end,
* @param {number} simplifiedOffset Simplified offset.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.douglasPeucker = function(flatCoordinates, offset, end,
_ol_geom_flat_simplify_.douglasPeucker = function(flatCoordinates, offset, end,
stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {
var n = (end - offset) / stride;
if (n < 3) {
@@ -101,7 +103,7 @@ ol.geom.flat.simplify.douglasPeucker = function(flatCoordinates, offset, end,
for (i = first + stride; i < last; i += stride) {
var x = flatCoordinates[i];
var y = flatCoordinates[i + 1];
var squaredDistance = ol.math.squaredSegmentDistance(
var squaredDistance = _ol_math_.squaredSegmentDistance(
x, y, x1, y1, x2, y2);
if (squaredDistance > maxSquaredDistance) {
index = i;
@@ -142,13 +144,13 @@ ol.geom.flat.simplify.douglasPeucker = function(flatCoordinates, offset, end,
* @param {Array.<number>} simplifiedEnds Simplified ends.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.douglasPeuckers = function(flatCoordinates, offset,
_ol_geom_flat_simplify_.douglasPeuckers = function(flatCoordinates, offset,
ends, stride, squaredTolerance, simplifiedFlatCoordinates,
simplifiedOffset, simplifiedEnds) {
var i, ii;
for (i = 0, ii = ends.length; i < ii; ++i) {
var end = ends[i];
simplifiedOffset = ol.geom.flat.simplify.douglasPeucker(
simplifiedOffset = _ol_geom_flat_simplify_.douglasPeucker(
flatCoordinates, offset, end, stride, squaredTolerance,
simplifiedFlatCoordinates, simplifiedOffset);
simplifiedEnds.push(simplifiedOffset);
@@ -170,14 +172,14 @@ ol.geom.flat.simplify.douglasPeuckers = function(flatCoordinates, offset,
* @param {Array.<Array.<number>>} simplifiedEndss Simplified endss.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.douglasPeuckerss = function(
_ol_geom_flat_simplify_.douglasPeuckerss = function(
flatCoordinates, offset, endss, stride, squaredTolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {
var i, ii;
for (i = 0, ii = endss.length; i < ii; ++i) {
var ends = endss[i];
var simplifiedEnds = [];
simplifiedOffset = ol.geom.flat.simplify.douglasPeuckers(
simplifiedOffset = _ol_geom_flat_simplify_.douglasPeuckers(
flatCoordinates, offset, ends, stride, squaredTolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);
simplifiedEndss.push(simplifiedEnds);
@@ -198,7 +200,7 @@ ol.geom.flat.simplify.douglasPeuckerss = function(
* @param {number} simplifiedOffset Simplified offset.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.radialDistance = function(flatCoordinates, offset, end,
_ol_geom_flat_simplify_.radialDistance = function(flatCoordinates, offset, end,
stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {
if (end <= offset + stride) {
// zero or one point, no simplification possible, so copy and return
@@ -219,7 +221,7 @@ ol.geom.flat.simplify.radialDistance = function(flatCoordinates, offset, end,
for (offset += stride; offset < end; offset += stride) {
x2 = flatCoordinates[offset];
y2 = flatCoordinates[offset + 1];
if (ol.math.squaredDistance(x1, y1, x2, y2) > squaredTolerance) {
if (_ol_math_.squaredDistance(x1, y1, x2, y2) > squaredTolerance) {
// copy point at offset
simplifiedFlatCoordinates[simplifiedOffset++] = x2;
simplifiedFlatCoordinates[simplifiedOffset++] = y2;
@@ -241,7 +243,7 @@ ol.geom.flat.simplify.radialDistance = function(flatCoordinates, offset, end,
* @param {number} tolerance Tolerance.
* @return {number} Rounded value.
*/
ol.geom.flat.simplify.snap = function(value, tolerance) {
_ol_geom_flat_simplify_.snap = function(value, tolerance) {
return tolerance * Math.round(value / tolerance);
};
@@ -265,15 +267,15 @@ ol.geom.flat.simplify.snap = function(value, tolerance) {
* @param {number} simplifiedOffset Simplified offset.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.quantize = function(flatCoordinates, offset, end, stride,
_ol_geom_flat_simplify_.quantize = function(flatCoordinates, offset, end, stride,
tolerance, simplifiedFlatCoordinates, simplifiedOffset) {
// do nothing if the line is empty
if (offset == end) {
return simplifiedOffset;
}
// snap the first coordinate (P1)
var x1 = ol.geom.flat.simplify.snap(flatCoordinates[offset], tolerance);
var y1 = ol.geom.flat.simplify.snap(flatCoordinates[offset + 1], tolerance);
var x1 = _ol_geom_flat_simplify_.snap(flatCoordinates[offset], tolerance);
var y1 = _ol_geom_flat_simplify_.snap(flatCoordinates[offset + 1], tolerance);
offset += stride;
// add the first coordinate to the output
simplifiedFlatCoordinates[simplifiedOffset++] = x1;
@@ -282,8 +284,8 @@ ol.geom.flat.simplify.quantize = function(flatCoordinates, offset, end, stride,
// coordinate (P2)
var x2, y2;
do {
x2 = ol.geom.flat.simplify.snap(flatCoordinates[offset], tolerance);
y2 = ol.geom.flat.simplify.snap(flatCoordinates[offset + 1], tolerance);
x2 = _ol_geom_flat_simplify_.snap(flatCoordinates[offset], tolerance);
y2 = _ol_geom_flat_simplify_.snap(flatCoordinates[offset + 1], tolerance);
offset += stride;
if (offset == end) {
// all coordinates snap to the same value, the line collapses to a point
@@ -298,8 +300,8 @@ ol.geom.flat.simplify.quantize = function(flatCoordinates, offset, end, stride,
while (offset < end) {
var x3, y3;
// snap the next coordinate (P3)
x3 = ol.geom.flat.simplify.snap(flatCoordinates[offset], tolerance);
y3 = ol.geom.flat.simplify.snap(flatCoordinates[offset + 1], tolerance);
x3 = _ol_geom_flat_simplify_.snap(flatCoordinates[offset], tolerance);
y3 = _ol_geom_flat_simplify_.snap(flatCoordinates[offset + 1], tolerance);
offset += stride;
// skip P3 if it is equal to P2
if (x3 == x2 && y3 == y2) {
@@ -351,14 +353,14 @@ ol.geom.flat.simplify.quantize = function(flatCoordinates, offset, end, stride,
* @param {Array.<number>} simplifiedEnds Simplified ends.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.quantizes = function(
_ol_geom_flat_simplify_.quantizes = function(
flatCoordinates, offset, ends, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds) {
var i, ii;
for (i = 0, ii = ends.length; i < ii; ++i) {
var end = ends[i];
simplifiedOffset = ol.geom.flat.simplify.quantize(
simplifiedOffset = _ol_geom_flat_simplify_.quantize(
flatCoordinates, offset, end, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset);
@@ -381,7 +383,7 @@ ol.geom.flat.simplify.quantizes = function(
* @param {Array.<Array.<number>>} simplifiedEndss Simplified endss.
* @return {number} Simplified offset.
*/
ol.geom.flat.simplify.quantizess = function(
_ol_geom_flat_simplify_.quantizess = function(
flatCoordinates, offset, endss, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {
@@ -389,7 +391,7 @@ ol.geom.flat.simplify.quantizess = function(
for (i = 0, ii = endss.length; i < ii; ++i) {
var ends = endss[i];
var simplifiedEnds = [];
simplifiedOffset = ol.geom.flat.simplify.quantizes(
simplifiedOffset = _ol_geom_flat_simplify_.quantizes(
flatCoordinates, offset, ends, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);
@@ -398,3 +400,4 @@ ol.geom.flat.simplify.quantizess = function(
}
return simplifiedOffset;
};
export default _ol_geom_flat_simplify_;