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frontend/node_modules/echarts/lib/chart/helper/EffectPolyline.js

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+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+import { __extends } from "tslib";
+import Polyline from './Polyline.js';
+import EffectLine from './EffectLine.js';
+import * as vec2 from 'zrender/lib/core/vector.js';
+var EffectPolyline = /** @class */function (_super) {
+  __extends(EffectPolyline, _super);
+  function EffectPolyline() {
+    var _this = _super !== null && _super.apply(this, arguments) || this;
+    _this._lastFrame = 0;
+    _this._lastFramePercent = 0;
+    return _this;
+  }
+  // Override
+  EffectPolyline.prototype.createLine = function (lineData, idx, seriesScope) {
+    return new Polyline(lineData, idx, seriesScope);
+  };
+  ;
+  // Override
+  EffectPolyline.prototype._updateAnimationPoints = function (symbol, points) {
+    this._points = points;
+    var accLenArr = [0];
+    var len = 0;
+    for (var i = 1; i < points.length; i++) {
+      var p1 = points[i - 1];
+      var p2 = points[i];
+      len += vec2.dist(p1, p2);
+      accLenArr.push(len);
+    }
+    if (len === 0) {
+      this._length = 0;
+      return;
+    }
+    for (var i = 0; i < accLenArr.length; i++) {
+      accLenArr[i] /= len;
+    }
+    this._offsets = accLenArr;
+    this._length = len;
+  };
+  ;
+  // Override
+  EffectPolyline.prototype._getLineLength = function () {
+    return this._length;
+  };
+  ;
+  // Override
+  EffectPolyline.prototype._updateSymbolPosition = function (symbol) {
+    var t = symbol.__t < 1 ? symbol.__t : 2 - symbol.__t;
+    var points = this._points;
+    var offsets = this._offsets;
+    var len = points.length;
+    if (!offsets) {
+      // Has length 0
+      return;
+    }
+    var lastFrame = this._lastFrame;
+    var frame;
+    if (t < this._lastFramePercent) {
+      // Start from the next frame
+      // PENDING start from lastFrame ?
+      var start = Math.min(lastFrame + 1, len - 1);
+      for (frame = start; frame >= 0; frame--) {
+        if (offsets[frame] <= t) {
+          break;
+        }
+      }
+      // PENDING really need to do this ?
+      frame = Math.min(frame, len - 2);
+    } else {
+      for (frame = lastFrame; frame < len; frame++) {
+        if (offsets[frame] > t) {
+          break;
+        }
+      }
+      frame = Math.min(frame - 1, len - 2);
+    }
+    var p = (t - offsets[frame]) / (offsets[frame + 1] - offsets[frame]);
+    var p0 = points[frame];
+    var p1 = points[frame + 1];
+    symbol.x = p0[0] * (1 - p) + p * p1[0];
+    symbol.y = p0[1] * (1 - p) + p * p1[1];
+    var tx = symbol.__t < 1 ? p1[0] - p0[0] : p0[0] - p1[0];
+    var ty = symbol.__t < 1 ? p1[1] - p0[1] : p0[1] - p1[1];
+    symbol.rotation = -Math.atan2(ty, tx) - Math.PI / 2;
+    this._lastFrame = frame;
+    this._lastFramePercent = t;
+    symbol.ignore = false;
+  };
+  ;
+  return EffectPolyline;
+}(EffectLine);
+export default EffectPolyline;