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Factor out ol.geom.flat.simplify

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This commit is contained in:
Tom Payne
2014-03-12 11:21:55 +01:00
parent 2b6845244c
commit c8165a8168
8 changed files with 81 additions and 80 deletions
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46
src/ol/geom/simplifygeom.js → src/ol/geom/flat/simplifyflatgeom.js
View File

@@ -24,7 +24,7 @@
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
goog.provide('ol.geom.simplify');
goog.provide('ol.geom.flat.simplify');
goog.require('ol.geom.flat');
@@ -40,19 +40,19 @@ goog.require('ol.geom.flat');
* coordinates.
* @return {Array.<number>} Simplified line string.
*/
ol.geom.simplify.lineString = function(flatCoordinates, offset, end, stride,
squaredTolerance, highQuality, opt_simplifiedFlatCoordinates) {
ol.geom.flat.simplify.lineString = function(flatCoordinates, offset, end,
stride, squaredTolerance, highQuality, opt_simplifiedFlatCoordinates) {
var simplifiedFlatCoordinates = goog.isDef(opt_simplifiedFlatCoordinates) ?
opt_simplifiedFlatCoordinates : [];
if (!highQuality) {
end = ol.geom.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.simplify.douglasPeucker(
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeucker(
flatCoordinates, offset, end, stride, squaredTolerance,
simplifiedFlatCoordinates, 0);
return simplifiedFlatCoordinates;
@@ -70,7 +70,7 @@ ol.geom.simplify.lineString = function(flatCoordinates, offset, end, stride,
* @param {number} simplifiedOffset Simplified offset.
* @return {number} Simplified offset.
*/
ol.geom.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) {
@@ -142,13 +142,13 @@ ol.geom.simplify.douglasPeucker = function(flatCoordinates, offset, end,
* @param {Array.<number>} simplifiedEnds Simplified ends.
* @return {number} Simplified offset.
*/
ol.geom.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.simplify.douglasPeucker(
simplifiedOffset = ol.geom.flat.simplify.douglasPeucker(
flatCoordinates, offset, end, stride, squaredTolerance,
simplifiedFlatCoordinates, simplifiedOffset);
simplifiedEnds.push(simplifiedOffset);
@@ -170,14 +170,14 @@ ol.geom.simplify.douglasPeuckers = function(flatCoordinates, offset,
* @param {Array.<Array.<number>>} simplifiedEndss Simplified endss.
* @return {number} Simplified offset.
*/
ol.geom.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.simplify.douglasPeuckers(
simplifiedOffset = ol.geom.flat.simplify.douglasPeuckers(
flatCoordinates, offset, ends, stride, squaredTolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);
simplifiedEndss.push(simplifiedEnds);
@@ -198,7 +198,7 @@ ol.geom.simplify.douglasPeuckerss = function(
* @param {number} simplifiedOffset Simplified offset.
* @return {number} Simplified offset.
*/
ol.geom.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
@@ -241,7 +241,7 @@ ol.geom.simplify.radialDistance = function(flatCoordinates, offset, end,
* @param {number} tolerance Squared tolerance.
* @return {number} Rounded value.
*/
ol.geom.simplify.snap = function(value, tolerance) {
ol.geom.flat.simplify.snap = function(value, tolerance) {
return tolerance * Math.round(value / tolerance);
};
@@ -265,15 +265,15 @@ ol.geom.simplify.snap = function(value, tolerance) {
* @param {number} simplifiedOffset Simplified offset.
* @return {number} Simplified offset.
*/
ol.geom.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.simplify.snap(flatCoordinates[offset], tolerance);
var y1 = ol.geom.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 +282,8 @@ ol.geom.simplify.quantize = function(flatCoordinates, offset, end, stride,
// coordinate (P2)
var x2, y2;
do {
x2 = ol.geom.simplify.snap(flatCoordinates[offset], tolerance);
y2 = ol.geom.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 +298,8 @@ ol.geom.simplify.quantize = function(flatCoordinates, offset, end, stride,
while (offset < end) {
var x3, y3;
// snap the next coordinate (P3)
x3 = ol.geom.simplify.snap(flatCoordinates[offset], tolerance);
y3 = ol.geom.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 +351,14 @@ ol.geom.simplify.quantize = function(flatCoordinates, offset, end, stride,
* @param {Array.<number>} simplifiedEnds Simplified ends.
* @return {number} Simplified offset.
*/
ol.geom.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.simplify.quantize(
simplifiedOffset = ol.geom.flat.simplify.quantize(
flatCoordinates, offset, end, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset);
@@ -381,7 +381,7 @@ ol.geom.simplify.quantizes = function(
* @param {Array.<Array.<number>>} simplifiedEndss Simplified endss.
* @return {number} Simplified offset.
*/
ol.geom.simplify.quantizess = function(
ol.geom.flat.simplify.quantizess = function(
flatCoordinates, offset, endss, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {
@@ -389,7 +389,7 @@ ol.geom.simplify.quantizess = function(
for (i = 0, ii = endss.length; i < ii; ++i) {
var ends = endss[i];
var simplifiedEnds = [];
simplifiedOffset = ol.geom.simplify.quantizes(
simplifiedOffset = ol.geom.flat.simplify.quantizes(
flatCoordinates, offset, ends, stride,
tolerance,
simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);

4
src/ol/geom/linearring.js
View File

@@ -5,7 +5,7 @@ goog.require('ol.geom.GeometryType');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat.simplify');
@@ -94,7 +94,7 @@ ol.geom.LinearRing.prototype.getCoordinates = function() {
ol.geom.LinearRing.prototype.getSimplifiedGeometryInternal =
function(squaredTolerance) {
var simplifiedFlatCoordinates = [];
simplifiedFlatCoordinates.length = ol.geom.simplify.douglasPeucker(
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeucker(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
squaredTolerance, simplifiedFlatCoordinates, 0);
var simplifiedLinearRing = new ol.geom.LinearRing(null);

4
src/ol/geom/linestring.js
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@@ -7,7 +7,7 @@ goog.require('ol.geom.GeometryType');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat.simplify');
@@ -160,7 +160,7 @@ ol.geom.LineString.prototype.getFlatMidpoint = function() {
ol.geom.LineString.prototype.getSimplifiedGeometryInternal =
function(squaredTolerance) {
var simplifiedFlatCoordinates = [];
simplifiedFlatCoordinates.length = ol.geom.simplify.douglasPeucker(
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeucker(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
squaredTolerance, simplifiedFlatCoordinates, 0);
var simplifiedLineString = new ol.geom.LineString(null);

4
src/ol/geom/multilinestring.js
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@@ -8,7 +8,7 @@ goog.require('ol.geom.LineString');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat.simplify');
@@ -214,7 +214,7 @@ ol.geom.MultiLineString.prototype.getSimplifiedGeometryInternal =
function(squaredTolerance) {
var simplifiedFlatCoordinates = [];
var simplifiedEnds = [];
simplifiedFlatCoordinates.length = ol.geom.simplify.douglasPeuckers(
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeuckers(
this.flatCoordinates, 0, this.ends_, this.stride, squaredTolerance,
simplifiedFlatCoordinates, 0, simplifiedEnds);
var simplifiedMultiLineString = new ol.geom.MultiLineString(null);

4
src/ol/geom/multipolygon.js
View File

@@ -9,7 +9,7 @@ goog.require('ol.geom.Polygon');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat.simplify');
@@ -219,7 +219,7 @@ ol.geom.MultiPolygon.prototype.getSimplifiedGeometryInternal =
function(squaredTolerance) {
var simplifiedFlatCoordinates = [];
var simplifiedEndss = [];
simplifiedFlatCoordinates.length = ol.geom.simplify.quantizess(
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.quantizess(
this.flatCoordinates, 0, this.endss_, this.stride,
Math.sqrt(squaredTolerance),
simplifiedFlatCoordinates, 0, simplifiedEndss);

4
src/ol/geom/polygon.js
View File

@@ -9,7 +9,7 @@ goog.require('ol.geom.Point');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat.simplify');
@@ -243,7 +243,7 @@ ol.geom.Polygon.prototype.getSimplifiedGeometryInternal =
function(squaredTolerance) {
var simplifiedFlatCoordinates = [];
var simplifiedEnds = [];
simplifiedFlatCoordinates.length = ol.geom.simplify.quantizes(
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.quantizes(
this.flatCoordinates, 0, this.ends_, this.stride,
Math.sqrt(squaredTolerance),
simplifiedFlatCoordinates, 0, simplifiedEnds);

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

@@ -17,7 +17,7 @@ goog.require('ol.color');
goog.require('ol.extent');
goog.require('ol.extent.Relationship');
goog.require('ol.geom.flat');
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat.simplify');
goog.require('ol.render.IReplayGroup');
goog.require('ol.render.IVectorContext');
goog.require('ol.render.canvas');
@@ -1310,7 +1310,7 @@ ol.render.canvas.PolygonReplay.prototype.finish = function() {
var coordinates = this.coordinates;
var i, ii;
for (i = 0, ii = coordinates.length; i < ii; ++i) {
coordinates[i] = ol.geom.simplify.snap(coordinates[i], tolerance);
coordinates[i] = ol.geom.flat.simplify.snap(coordinates[i], tolerance);
}
}
};

91
test/spec/ol/geom/simplifygeom.test.js → test/spec/ol/geom/flat/simplifyflatgeom.test.js
View File

@@ -1,7 +1,7 @@
goog.provide('ol.test.geom.simplify');
describe('ol.geom.simplify', function() {
describe('ol.geom.flat.simplify', function() {
var flatCoordinates = [
224.55, 250.15, 226.91, 244.19, 233.31, 241.45, 234.98, 236.06,
@@ -81,31 +81,31 @@ describe('ol.geom.simplify', function() {
866.36, 480.77
];
describe('ol.geom.simplify.lineString', function() {
describe('ol.geom.flat.simplify.lineString', function() {
it('works with empty line strings', function() {
expect(ol.geom.simplify.lineString([], 0, 0, 2, 1, true)).to.
expect(ol.geom.flat.simplify.lineString([], 0, 0, 2, 1, true)).to.
eql([]);
expect(ol.geom.simplify.lineString([], 0, 0, 2, 1, false)).to.
expect(ol.geom.flat.simplify.lineString([], 0, 0, 2, 1, false)).to.
eql([]);
});
it('works with a line string with a single point', function() {
expect(ol.geom.simplify.lineString([1, 2], 0, 2, 2, 1, true)).to.
expect(ol.geom.flat.simplify.lineString([1, 2], 0, 2, 2, 1, true)).to.
eql([1, 2]);
expect(ol.geom.simplify.lineString([1, 2], 0, 2, 2, 1, false)).to.
expect(ol.geom.flat.simplify.lineString([1, 2], 0, 2, 2, 1, false)).to.
eql([1, 2]);
});
it('returns the expected result with low quality', function() {
var result = ol.geom.simplify.lineString(
var result = ol.geom.flat.simplify.lineString(
flatCoordinates, 0, flatCoordinates.length, 2, 25, false);
expect(result.length).to.be(simplifiedFlatCoordinates.length);
expect(result).to.eql(simplifiedFlatCoordinates);
});
it('returns the expected result with high quality', function() {
var result = ol.geom.simplify.lineString(
var result = ol.geom.flat.simplify.lineString(
flatCoordinates, 0, flatCoordinates.length, 2, 25, true);
expect(result.length).to.be(simplifiedHighQualityFlatCoordinates.length);
expect(result).to.eql(simplifiedHighQualityFlatCoordinates);
@@ -113,7 +113,7 @@ describe('ol.geom.simplify', function() {
});
describe('ol.geom.simplify.radialDistance', function() {
describe('ol.geom.flat.simplify.radialDistance', function() {
var dest;
beforeEach(function() {
@@ -121,63 +121,63 @@ describe('ol.geom.simplify', function() {
});
it('works with empty line strings', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[], 0, 0, 2, 1, dest, 0)).to.be(0);
expect(dest).to.eql([]);
});
it('works with a line string with a single point', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[1, 2], 0, 2, 2, 1, dest, 0)).to.be(2);
expect(dest).to.eql([1, 2]);
});
it('works with a line string with two points', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[1, 2, 3, 4], 0, 4, 2, 1, dest, 0)).to.be(4);
expect(dest).to.eql([1, 2, 3, 4]);
});
it('works when the points are widely spaced', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[0, 0, 1, 0, 2, 0, 3, 0], 0, 8, 2, 0.5, dest, 0)).to.be(8);
expect(dest).to.eql([0, 0, 1, 0, 2, 0, 3, 0]);
});
it('works when the spacing matches the tolerance', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[0, 0, 1, 0, 2, 0, 3, 0], 0, 8, 2, 1, dest, 0)).to.be(6);
expect(dest).to.eql([0, 0, 2, 0, 3, 0]);
});
it('works when the points are closely spaced', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[0, 0, 1, 0, 2, 0, 3, 0], 0, 8, 2, 1.5, dest, 0)).to.be(6);
expect(dest).to.eql([0, 0, 2, 0, 3, 0]);
});
it('works when the line oscillates with widely spaced points', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1], 0, 12, 2, 1, dest, 0)).
to.be(12);
expect(dest).to.eql([0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1]);
});
it('works when the line oscillates with closely spaced points', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1], 0, 12, 2, 2, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 1, 1]);
});
it('works when the line oscillates within the tolerance', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0], 0, 14, 2, 2, dest, 0)).
to.be(2);
expect(dest).to.eql([0, 0]);
});
it('works with real data', function() {
expect(ol.geom.simplify.radialDistance(
expect(ol.geom.flat.simplify.radialDistance(
flatCoordinates, 0, flatCoordinates.length, 2, 25, dest, 0)).
to.be(simplifiedRadiallyFlatCoordinates.length);
expect(dest).to.eql(simplifiedRadiallyFlatCoordinates);
@@ -185,7 +185,7 @@ describe('ol.geom.simplify', function() {
});
describe('ol.geom.simplify.douglasPeucker', function() {
describe('ol.geom.flat.simplify.douglasPeucker', function() {
var dest;
beforeEach(function() {
@@ -193,93 +193,93 @@ describe('ol.geom.simplify', function() {
});
it('works with empty line strings', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[], 0, 0, 2, 1, dest, 0)).to.be(0);
expect(dest).to.eql([]);
});
it('works with a line string with a single point', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[1, 2], 0, 2, 2, 1, dest, 0)).to.be(2);
expect(dest).to.eql([1, 2]);
});
it('works with a line string with two points', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[1, 2, 3, 4], 0, 4, 2, 1, dest, 0)).to.be(4);
expect(dest).to.eql([1, 2, 3, 4]);
});
it('works when the points are widely spaced', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 0, 2, 0, 3, 0], 0, 8, 2, 0.5, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 3, 0]);
});
it('works when the spacing matches the tolerance', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 0, 2, 0, 3, 0], 0, 8, 2, 1, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 3, 0]);
});
it('works when the points are closely spaced', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 0, 2, 0, 3, 0], 0, 8, 2, 1.5, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 3, 0]);
});
it('does not elimnate points outside the tolerance', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 2, 0], 0, 6, 2, 0.5, dest, 0)).to.be(6);
expect(dest).to.eql([0, 0, 1, 1, 2, 0]);
});
it('does eliminate points within the tolerance', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 2, 0], 0, 6, 2, 2, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 2, 0]);
});
it('does not eliminate multiple points outside the tolerance', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 1, -1, 2, 0], 0, 8, 2, 0.5, dest, 0)).to.be(8);
expect(dest).to.eql([0, 0, 1, 1, 1, -1, 2, 0]);
});
it('does eliminate multiple points within the tolerance', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 1, -1, 2, 0], 0, 8, 2, 2, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 2, 0]);
});
it('works when the line oscillates with widely spaced points', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1], 0, 12, 2, 1, dest, 0)).to.be(4);
expect(dest).to.eql([0, 0, 1, 1]);
});
it('works when the line oscillates with closely spaced points', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1], 0, 12, 2, 2, dest, 0)).
to.be(4);
expect(dest).to.eql([0, 0, 1, 1]);
});
it('works when the line oscillates within the tolerance', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0], 0, 14, 2, 2, dest, 0)).
to.be(4);
expect(dest).to.eql([0, 0, 0, 0]);
});
it('works on small triangles', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
[3, 0, 4, 1, 5, 2, 5, 0], 0, 8, 2, 1, dest, 0)).to.be(6);
expect(dest).to.eql([3, 0, 5, 2, 5, 0]);
});
it('is the same as high quality simplification', function() {
expect(ol.geom.simplify.douglasPeucker(
expect(ol.geom.flat.simplify.douglasPeucker(
flatCoordinates, 0, flatCoordinates.length, 2, 25, dest, 0)).
to.be(simplifiedHighQualityFlatCoordinates.length);
expect(dest).to.eql(simplifiedHighQualityFlatCoordinates);
@@ -287,32 +287,32 @@ describe('ol.geom.simplify', function() {
});
describe('ol.geom.simplify.quantize', function() {
describe('ol.geom.flat.simplify.quantize', function() {
it('handles empty coordinates', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[], 0, 0, 2, 2, simplifiedFlatCoordinates, 0)).to.be(0);
expect(simplifiedFlatCoordinates).to.be.empty();
});
it('expands points to a zero-length line', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0, 0, 0, 0], 0, 4, 2, 2, simplifiedFlatCoordinates, 0)).to.be(4);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 0, 0]);
});
it('snaps near-by points to the same value', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0.1, 0, 0, 0.1], 0, 4, 2, 2, simplifiedFlatCoordinates, 0)).to.be(4);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 0, 0]);
});
it('eliminates duplicate snapped points', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0.1, 0, 2, 0, 2.1, 0, 2, 0.1, 1.9, 0, 2, -0.1], 0, 12, 2, 2,
simplifiedFlatCoordinates, 0)).to.be(4);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 2, 0]);
@@ -320,7 +320,7 @@ describe('ol.geom.simplify', function() {
it('eliminates horizontal colinear points', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0, 0, 2, 0, 4, 0, 6, 0], 0, 8, 2, 2,
simplifiedFlatCoordinates, 0)).to.be(4);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 6, 0]);
@@ -328,7 +328,7 @@ describe('ol.geom.simplify', function() {
it('eliminates vertical colinear points', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0, 0, 0, -2, 0, -4, 0, -6], 0, 8, 2, 2,
simplifiedFlatCoordinates, 0)).to.be(4);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 0, -6]);
@@ -336,7 +336,7 @@ describe('ol.geom.simplify', function() {
it('eliminates diagonal colinear points', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0, 0, 2, -2, 4, -4, 6, -6], 0, 8, 2, 2,
simplifiedFlatCoordinates, 0)).to.be(4);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 6, -6]);
@@ -344,7 +344,7 @@ describe('ol.geom.simplify', function() {
it('handles switchbacks', function() {
var simplifiedFlatCoordinates = [];
expect(ol.geom.simplify.quantize(
expect(ol.geom.flat.simplify.quantize(
[0, 0, 2, 0, 0, 0, 4, 0], 0, 8, 2, 2,
simplifiedFlatCoordinates, 0)).to.be(8);
expect(simplifiedFlatCoordinates).to.eql([0, 0, 2, 0, 0, 0, 4, 0]);
@@ -355,4 +355,5 @@ describe('ol.geom.simplify', function() {
});
goog.require('ol.geom.simplify');
goog.require('ol.geom.flat');
goog.require('ol.geom.flat.simplify');