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show labels in wrapped worlds

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test labels in wrapped world
This commit is contained in:
mike-000
2020-03-11 14:09:33 +00:00
parent f448d7179a
commit 4ca966bd92
2 changed files with 100 additions and 39 deletions
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91
src/ol/layer/Graticule.js
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@@ -17,6 +17,7 @@ import {
import {
applyTransform,
containsCoordinate,
containsExtent,
equals,
getCenter,
getHeight,
@@ -622,9 +623,9 @@ class Graticule extends VectorLayer {
drawLabels_(event) {
const rotation = event.frameState.viewState.rotation;
const extent = event.frameState.extent;
let rotationCenter, rotationExtent;
const rotationCenter = getCenter(extent);
let rotationExtent = extent;
if (rotation) {
rotationCenter = getCenter(extent);
const width = getWidth(extent);
const height = getHeight(extent);
const cr = Math.abs(Math.cos(rotation));
@@ -637,42 +638,60 @@ class Graticule extends VectorLayer {
];
}
const vectorContext = getVectorContext(event);
let poolIndex = this.meridians_.length + this.parallels_.length;
let feature, index, l, textPoint;
if (this.meridiansLabels_) {
for (index = 0, l = this.meridiansLabels_.length; index < l; ++index) {
const lineString = this.meridians_[index];
if (!rotation) {
textPoint = this.getMeridianPoint_(lineString, extent, index);
} else {
const clone = lineString.clone();
clone.rotate(-rotation, rotationCenter);
textPoint = this.getMeridianPoint_(clone, rotationExtent, index);
textPoint.rotate(rotation, rotationCenter);
}
feature = this.featurePool_[poolIndex++];
feature.setGeometry(textPoint);
feature.set('graticule_label', this.meridiansLabels_[index].text);
vectorContext.drawFeature(feature, this.lonLabelStyle_(feature));
}
let startWorld = 0;
let endWorld = 0;
let labelsAtStart = this.latLabelPosition_ < 0.5;
const projectionExtent = this.projection_.getExtent();
const worldWidth = getWidth(projectionExtent);
if (this.getSource().getWrapX() && this.projection_.canWrapX() && !containsExtent(projectionExtent, extent)) {
startWorld = Math.floor((extent[0] - projectionExtent[0]) / worldWidth);
endWorld = Math.ceil((extent[2] - projectionExtent[2]) / worldWidth);
const inverted = Math.abs(rotation) > Math.PI / 2;
labelsAtStart = labelsAtStart !== inverted;
}
if (this.parallelsLabels_) {
for (index = 0, l = this.parallels_.length; index < l; ++index) {
const lineString = this.parallels_[index];
if (!rotation) {
textPoint = this.getParallelPoint_(lineString, extent, index);
} else {
const clone = lineString.clone();
clone.rotate(-rotation, rotationCenter);
textPoint = this.getParallelPoint_(clone, rotationExtent, index);
textPoint.rotate(rotation, rotationCenter);
const vectorContext = getVectorContext(event);
for (let world = startWorld; world <= endWorld; ++world) {
let poolIndex = this.meridians_.length + this.parallels_.length;
let feature, index, l, textPoint;
if (this.meridiansLabels_) {
for (index = 0, l = this.meridiansLabels_.length; index < l; ++index) {
const lineString = this.meridians_[index];
if (!rotation && world === 0) {
textPoint = this.getMeridianPoint_(lineString, extent, index);
} else {
const clone = lineString.clone();
clone.translate(world * worldWidth, 0);
clone.rotate(-rotation, rotationCenter);
textPoint = this.getMeridianPoint_(clone, rotationExtent, index);
textPoint.rotate(rotation, rotationCenter);
}
feature = this.featurePool_[poolIndex++];
feature.setGeometry(textPoint);
feature.set('graticule_label', this.meridiansLabels_[index].text);
vectorContext.drawFeature(feature, this.lonLabelStyle_(feature));
}
}
if (this.parallelsLabels_) {
if (world === startWorld && labelsAtStart || world === endWorld && !labelsAtStart) {
for (index = 0, l = this.parallels_.length; index < l; ++index) {
const lineString = this.parallels_[index];
if (!rotation && world === 0) {
textPoint = this.getParallelPoint_(lineString, extent, index);
} else {
const clone = lineString.clone();
clone.translate(world * worldWidth, 0);
clone.rotate(-rotation, rotationCenter);
textPoint = this.getParallelPoint_(clone, rotationExtent, index);
textPoint.rotate(rotation, rotationCenter);
}
feature = this.featurePool_[poolIndex++];
feature.setGeometry(textPoint);
feature.set('graticule_label', this.parallelsLabels_[index].text);
vectorContext.drawFeature(feature, this.latLabelStyle_(feature));
}
}
feature = this.featurePool_[poolIndex++];
feature.setGeometry(textPoint);
feature.set('graticule_label', this.parallelsLabels_[index].text);
vectorContext.drawFeature(feature, this.latLabelStyle_(feature));
}
}
}