Move raster reprojection error threshold to a common reproj module

doc/tutorials/raster-reprojection.md

@@ -107,7 +107,7 @@ In case you are creating a custom build of OpenLayers and do not need the reproj
 See [Custom builds](custom-builds.html#defines) tutorial on how to do this.
 
 ### Triangulation precision threshold
-The default [triangulation error threshold](#dynamic-triangulation) in pixels is given by `DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD` (0.5 pixel).
+The default [triangulation error threshold](#dynamic-triangulation) in pixels is given by `ERROR_THRESHOLD` (0.5 pixel).
 In case a different threshold needs to be defined for different sources, the `reprojectionErrorThreshold` option can be passed when constructing the tile image source.
 
 ###Limiting visibility of reprojected map by extent

src/ol/index.js

@@ -11,13 +11,6 @@ import webgl from './webgl.js';
 export var ASSUME_TOUCH = false;
 
 
-/**
- * @type {number} Default maximum allowed threshold  (in pixels) for
- *     reprojection triangulation. Default is `0.5`.
- */
-export var DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD = 0.5;
-
-
 /**
  * @type {string} Default WMS version.
  */
@@ -173,7 +166,6 @@ export default {
   inherits: inherits,
   VERSION: VERSION,
   ASSUME_TOUCH: ASSUME_TOUCH,
-  DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD: DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD,
   DEFAULT_WMS_VERSION: DEFAULT_WMS_VERSION,
   ENABLE_CANVAS: ENABLE_CANVAS,
   ENABLE_PROJ4JS: ENABLE_PROJ4JS,

src/ol/reproj/Image.js

@@ -1,7 +1,8 @@
 /**
  * @module ol/reproj/Image
  */
-import {DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD, inherits} from '../index.js';
+import {ERROR_THRESHOLD} from './common.js';
+import {inherits} from '../index.js';
 import _ol_ImageBase_ from '../ImageBase.js';
 import _ol_ImageState_ from '../ImageState.js';
 import _ol_events_ from '../events.js';
@@ -48,7 +49,7 @@ var _ol_reproj_Image_ = function(sourceProj, targetProj,
   var sourceResolution = _ol_reproj_.calculateSourceResolution(
       sourceProj, targetProj, targetCenter, targetResolution);
 
-  var errorThresholdInPixels = DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD;
+  var errorThresholdInPixels = ERROR_THRESHOLD;
 
   /**
    * @private

src/ol/reproj/Tile.js

@@ -1,7 +1,8 @@
 /**
  * @module ol/reproj/Tile
  */
-import {DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD, inherits} from '../index.js';
+import {ERROR_THRESHOLD} from './common.js';
+import {inherits} from '../index.js';
 import _ol_Tile_ from '../Tile.js';
 import _ol_TileState_ from '../TileState.js';
 import _ol_events_ from '../events.js';
@@ -136,7 +137,7 @@ var _ol_reproj_Tile_ = function(sourceProj, sourceTileGrid,
   }
 
   var errorThresholdInPixels = opt_errorThreshold !== undefined ?
-    opt_errorThreshold : DEFAULT_RASTER_REPROJECTION_ERROR_THRESHOLD;
+    opt_errorThreshold : ERROR_THRESHOLD;
 
   /**
    * @private

src/ol/reproj/common.js

@@ -0,0 +1,5 @@
+/**
+ * @type {number} Default maximum allowed threshold  (in pixels) for
+ *     reprojection triangulation.
+ */
+export var ERROR_THRESHOLD = 0.5;