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Get simplified transformed geometry and load features in user projection

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This commit is contained in:
Tim Schaub
2019-09-24 13:32:47 +02:00
parent 3c38a38570
commit 30cbbfea9d
9 changed files with 214 additions and 24 deletions
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22
src/ol/geom/Geometry.js
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@@ -5,10 +5,10 @@ import {abstract} from '../util.js';
import BaseObject from '../Object.js';
import {createEmpty, getHeight, returnOrUpdate} from '../extent.js';
import {transform2D} from './flat/transform.js';
import {get as getProjection, getTransform} from '../proj.js';
import {get as getProjection, getTransform, getTransformFromProjections} from '../proj.js';
import Units from '../proj/Units.js';
import {create as createTransform, compose as composeTransform} from '../transform.js';
import {memoizeOne} from '../functions.js';
/**
* @type {import("../transform.js").Transform}
@@ -63,6 +63,24 @@ class Geometry extends BaseObject {
*/
this.simplifiedGeometryRevision = 0;
/**
* Get a transformed and simplified version of the geometry.
* @abstract
* @param {number} squaredTolerance Squared tolerance.
* @param {import("../proj/Projection.js").default} sourceProjection The source projection.
* @param {import("../proj/Projection.js").default} destProjection The destination projection.
* @return {Geometry} Simplified geometry.
*/
this.simplifyTransformed = memoizeOne(function(squaredTolerance, sourceProjection, destProjection) {
if (!sourceProjection || !destProjection) {
return this.getSimplifiedGeometry(squaredTolerance);
}
const transform = getTransformFromProjections(sourceProjection, destProjection);
const clone = this.clone();
clone.applyTransform(transform);
return clone.getSimplifiedGeometry(squaredTolerance);
});
}
/**