refactor(Extent): move calculation of Extent intersection to static E…

…xtent.intersectsExtent(ExtentA,ExtentB)

src/Converter/Feature2Texture.js

@@ -24,7 +24,7 @@ function _drawPolygon(ctx, vertices, indices, style, size, extent, invCtxScale,
     // build contour
     ctx.beginPath();
     for (const indice of indices) {
-        if (indice.extent && indice.extent.intersectsExtent(extent)) {
+        if (indice.extent && Extent.intersectsExtent(indice.extent, extent)) {
             const offset = indice.offset * size;
             const count = offset + indice.count * size;
             ctx.moveTo(vertices[offset], vertices[offset + 1]);
@@ -108,7 +108,7 @@ function drawFeature(ctx, feature, extent, style, invCtxScale) {
     const globals = { zoom: extent.zoom };
 
     for (const geometry of feature.geometries) {
-        if (geometry.extent.intersectsExtent(extent)) {
+        if (Extent.intersectsExtent(geometry.extent, extent)) {
             const context = { globals, properties: () => geometry.properties };
             const contextStyle = (geometry.properties.style || style).drawingStylefromContext(context);
 

src/Core/Geographic/Extent.js

@@ -424,12 +424,16 @@ class Extent {
      * @returns {Boolean}
      */
     intersectsExtent(extent) {
+        return Extent.intersectsExtent(this, extent);
+    }
+
+    static intersectsExtent(extentA, extentB) {
         // TODO don't work when is on limit
-        const other = extent.crs == this.crs ? extent : extent.as(this.crs, _extent);
-        return !(this.west >= other.east ||
-                 this.east <= other.west ||
-                 this.south >= other.north ||
-                 this.north <= other.south);
+        const other = extentB.crs == extentA.crs ? extentB : extentB.as(extentA.crs, _extent);
+        return !(extentA.west >= other.east ||
+            extentA.east <= other.west ||
+            extentA.south >= other.north ||
+            extentA.north <= other.south);
     }
 
     /**