【fix】优化ol矢量瓦片沿线标注中文显示

Author: songyumeng

src/openlayers/overlay/vectortile/MapboxStyles.js

@@ -16,7 +16,7 @@ import Text from 'ol/style/Text';
  * <div style="padding: 20px;border: 1px solid #eee;border-left-width: 5px;border-radius: 3px;border-left-color: #ce4844;">
  *      <p style="color: #ce4844">Notice</p>
  *      <p style="font-size: 13px">该功能依赖 <a href='https://github.com/boundlessgeo/ol-mapbox-style'>ol-mapbox-style</a> 插件，请确认引入该插件。</p>
- *      `<script type="text/javascript" src="https://rawgit.com/boundlessgeo/ol-mapbox-style/v2.11.2/dist/olms.js"></script>`
+ *      `<script type="text/javascript" src="https://rawgit.com/boundlessgeo/ol-mapbox-style/v2.11.2-1/dist/olms.js"></script>`
  * </div>
  * @category  Visualization VectorTile
  * @param {Object} options - 初始化参数。

src/openlayers/overlay/vectortile/olExtends.js

@@ -141,6 +141,7 @@ export var olExtends = function(targetMap) {
             maxAngle
         ) {
             var result = [];
+            const originStartM = startM;
 
             // Keep text upright
             var anglereverse = Math.atan2(
@@ -264,7 +265,7 @@ export var olExtends = function(targetMap) {
                 } else {
                     chunk = char;
                     chunkLength = charLength;
-                    data = [x, y, charLength / 2, angle, chunk];
+                    data = [x, y, charLength * originStartM, angle, chunk];
                     if (reverse) {
                         result.unshift(data);
                     } else {