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Better validation to handle polar projections

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For some projections (e.g. polar) the maximum or minimum values may be at the center.
To improve the display for polar projections take validated center values into account when calculating max and min.
This commit is contained in:
mike-000
2020-02-25 13:47:02 +00:00
committed by GitHub
parent 9039e2629b
commit adcf57ef20
1 changed files with 6 additions and 6 deletions
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src/ol/layer/Graticule.js
+6 -6
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@@ -679,8 +679,8 @@ class Graticule extends VectorLayer {
]; ];
const centerLonLat = this.toLonLatTransform_(validCenter); const centerLonLat = this.toLonLatTransform_(validCenter);
let centerLon = centerLonLat[0]; let centerLon = clamp(centerLonLat[0], this.minLon_, this.maxLon_);
let centerLat = centerLonLat[1]; let centerLat = clamp(centerLonLat[1], this.minLat_, this.maxLat_);
const maxLines = this.maxLines_; const maxLines = this.maxLines_;
let cnt, idx, lat, lon; let cnt, idx, lat, lon;
@@ -693,10 +693,10 @@ class Graticule extends VectorLayer {
validExtent = applyTransform(validExtent, this.toLonLatTransform_, undefined, 8); validExtent = applyTransform(validExtent, this.toLonLatTransform_, undefined, 8);
const maxLat = Math.min(validExtent[3], this.maxLat_); const maxLat = clamp(validExtent[3], centerLat, this.maxLat_);
const maxLon = Math.min(validExtent[2], this.maxLon_); const maxLon = clamp(validExtent[2], centerLon, this.maxLon_);
const minLat = Math.max(validExtent[1], this.minLat_); const minLat = clamp(validExtent[1], this.minLat_, centerLat);
const minLon = Math.max(validExtent[0], this.minLon_); const minLon = clamp(validExtent[0], this.minLon_, centerLon);
// Create meridians // Create meridians