-
Notifications
You must be signed in to change notification settings - Fork 0
/
3BApproximate.html
512 lines (459 loc) · 15.2 KB
/
3BApproximate.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<title>Draw smooth curve </title>
<link rel="stylesheet" href="http://localhost/arcgis_js_v416_sdk/arcgis_js_api/library/4.16/esri/css/main.css" />
<script src="http://localhost/arcgis_js_v416_sdk/arcgis_js_api/library/4.16/init.js"></script>
<style>
html,
body,
#viewDiv {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
</style>
<script>
require([
"esri/Map",
"esri/views/SceneView",
"esri/layers/GraphicsLayer",
"esri/widgets/Sketch/SketchViewModel",
"esri/symbols/WebStyleSymbol",
'esri/layers/SceneLayer',
"esri/tasks/support/Query",
"esri/tasks/QueryTask",
"esri/Graphic"
], function (
Map,
SceneView,
GraphicsLayer,
SketchViewModel,
WebStyleSymbol,
SceneLayer,
EsriQuery,
QueryTask,
Graphic
) {
let urls = [
'需要添加的服务URL',
// 场地：
];
let PathList = [];
var myMap = new Map({
basemap: '',
});
var view = new SceneView({
container: "viewDiv",
map: myMap,
extent: {
xmin: -9177811,
ymin: 4247000,
xmax: -9176791,
ymax: 4247784,
spatialReference: 102100,
}
});
view.spatialReference = {
wkid: 4549
}
var graphicsLayer = new GraphicsLayer({
elevationInfo: {
mode: "relative-to-ground" //相对于地面的高程或综合网格层。
}
});
//添加底图
addmap(urls);
//添加GraphicsLayer
myMap.add(graphicsLayer);
//闭合曲线
pointsTest1 = [{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332482,
y: 340822
},
{
x: 332481,
y: 340820
},
{
x: 332242,
y: 340723
},
]
//非闭合曲线
pointsTest2 = [{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332482,
y: 340822
},
{
x: 332481,
y: 340820
},
]
//直角
pointsTest3 = [{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332361,
y: 340810
},
{
x: 332361,
y: 340808
},
]
//两个转角
pointsTest4 = [{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332361,
y: 340810
},
{
x: 332381,
y: 340808
},
]
//两个转角 之间距离较大
pointsTest5 = [{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332361,
y: 340810
},
{
x: 332391,
y: 340838
},
]
//首尾转角
pointsTest6 = [{
x: 332235,
y: 340723
},
{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332361,
y: 340810
},
{
x: 332391,
y: 340838
},
]
//首尾转角2
pointsTest7 = [{
x: 332225,
y: 340723
},
{
x: 332235,
y: 340723
},
{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332361,
y: 340810
},
{
x: 332391,
y: 340838
},
]
pointsTest8 = [{
x: 332235,
y: 340723
},
{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332362,
y: 340823
},
{
x: 332365,
y: 340828
},
]
pointsTest9 = [{
x: 332220,
y: 340723
},
{
x: 332242,
y: 340723
},
{
x: 332361,
y: 340822
},
{
x: 332362,
y: 340823
},
{
x: 332365,
y: 340828
},
]
// let resultPoints = getCtrlPoint(points);
// console.log(resultPoints)
let resultPoints = smoothLineApproximate(pointsTest9);
console.log(resultPoints)
setDataFormat(resultPoints);
//闭合曲线
let PathListTest1 = [
[332242, 340723, 10],
[332361, 340822, 10],
[332482, 340822, 10],
[332481, 340820, 10],
[332242, 340723, 10],
]
//非闭合曲线
let PathListTest2 = [
[332242, 340723, 10],
[332361, 340822, 10],
[332482, 340822, 10],
[332481, 340820, 10],
]
//直角
let PathListTest3 = [
[332242, 340723, 10],
[332361, 340822, 10],
[332361, 340810, 10],
[332361, 340808, 10],
]
//两个转角
let PathListTest4 = [
[332242, 340723, 10],
[332361, 340822, 10],
[332361, 340810, 10],
[332381, 340808, 10],
]
//两个转角直角 距离较大
let PathListTest5 = [
[332242, 340723, 10],
[332361, 340822, 10],
[332361, 340810, 10],
[332391, 340838, 10],
]
//首尾转角
let PathListTest6 = [
[332235, 340723, 10],
[332242, 340723, 10],
[332361, 340822, 10],
[332361, 340810, 10],
[332391, 340838, 10],
]
//首尾转角2
let PathListTest7 = [
[332225, 340723, 10],
[332235, 340723, 10],
[332242, 340723, 10],
[332361, 340822, 10],
[332361, 340810, 10],
[332391, 340838, 10],
]
//转角较大
let PathListTest8 = [
[332235, 340723, 10],
[332242, 340723, 10],
[332361, 340822, 10],
[332362, 340823, 10],
[332365, 340828, 10],
]
//转角较大 距离较大
let PathListTest9 = [
[332220, 340723, 10],
[332242, 340723, 10],
[332361, 340822, 10],
[332362, 340823, 10],
[332365, 340828, 10],
]
addRedLine();
//加载地图服务
function addmap(urls) {
let SceneLayerNew;
for (let i = 0; i < urls.length; i++) {
SceneLayerNew = new SceneLayer({
url: urls[i]
});
myMap.add(SceneLayerNew)
}
}
//添加红线
function addRedLine() {
console.log(PathList)
var polylineShape = {
type: "polyline", // autocasts as new Polyline()
spatialReference: view.spatialReference, //需要设置多边形的空间参考
paths: PathListTest9,
hasZ: true,
};
lineSymbolShape = {
type: "simple-line", // autocasts as SimpleLineSymbol()
color: [255, 0, 0],
width: 4
};
var polylineGraphicShape = new Graphic({
geometry: polylineShape,
symbol: lineSymbolShape
});
graphicsLayer.add(polylineGraphicShape);
var polylineSmooth = {
type: "polyline", // autocasts as new Polyline()
spatialReference: view.spatialReference, //需要设置多边形的空间参考
paths: PathList,
hasZ: true,
};
lineSymbolSmooth = {
type: "simple-line", // autocasts as SimpleLineSymbol()
color: [0, 255, 0],
width: 4
};
var polylineGraphicSmooth = new Graphic({
geometry: polylineSmooth,
symbol: lineSymbolSmooth
});
graphicsLayer.add(polylineGraphicSmooth);
}
//三次B样条曲线方程 非闭合曲线 P(t)=∑i=0nPiFi,k(t) 近似拟合
function smoothLineApproximate(points) {
line = []
let newPnts = []
let pntLen = points.length;
newPnts.push({
x: points[0].x,
y: points[0].y
});
for (var n = 0; n < pntLen; n++) {
if (n <= pntLen - 4) { //因为是三次B样条 阶乘时需要用到式子的三次方，所以必须大于等于四个点
for (var t = 0.0; t <= 1.0; t += 0.1) {
var a1 = Math.pow((1 - t), 3) / 6;
var a2 = (3 * Math.pow(t, 3) - 6 * Math.pow(t, 2) + 4) / 6;
var a3 = (-3 * Math.pow(t, 3) + 3 * Math.pow(t, 2) + 3 * t + 1) / 6;
var a4 = Math.pow(t, 3) / 6;
var x = a1 * points[n].x + a2 * points[n + 1].x + a3 * points[n + 2].x + a4 *
points[n +
3].x;
var y = a1 * points[n].y + a2 * points[n + 1].y + a3 * points[n + 2].y + a4 *
points[n +
3].y;
newPnts.push({
x: x,
y: y
});
}
}
}
newPnts.push({
x: points[pntLen - 1].x,
y: points[pntLen - 1].y
});
console.log(newPnts)
return newPnts;
}
//三次B样条曲线插值拟合 插值拟合，平滑后的曲线过原始特征点
function getCtrlPoint(pointsArr, index, scaleA, scaleB) {
if (!scaleA || !scaleB) {
scaleA = 0.15;
scaleB = 0.15;
}
// 处理两种极端情形
if (index < 1) {
var pAx = pointsArr[0].x + (pointsArr[1].x - pointsArr[0].x) * scaleA;
var pAy = pointsArr[0].y + (pointsArr[1].y - pointsArr[0].y) * scaleA;
} else {
var pAx = pointsArr[index].x + (pointsArr[index + 1].x - pointsArr[index - 1].x) * scaleA;
var pAy = pointsArr[index].y + (pointsArr[index + 1].y - pointsArr[index - 1].y) * scaleA;
}
if (index > pointsArr.length - 3) {
var last = pointsArr.length - 1
var pBx = pointsArr[last].x - (pointsArr[last].x - pointsArr[last - 1].x) * scaleB;
var pBy = pointsArr[last].y - (pointsArr[last].y - pointsArr[last - 1].y) * scaleB;
} else {
var pBx = pointsArr[index + 1].x - (pointsArr[index + 2].x - pointsArr[index].x) * scaleB;
var pBy = pointsArr[index + 1].y - (pointsArr[index + 2].y - pointsArr[index].y) * scaleB;
}
return {
pA: {
x: pAx,
y: pAy
},
pB: {
x: pBx,
y: pBy
}
}
}
function setDataFormat(pointList) {
for (let i = 0; i < pointList.length; i++) {
PathList[i] = [pointList[i].x, pointList[i].y, 10]
}
}
// }
});
</script>
</head>
<body>
<div id="viewDiv">
</div>
</body>
</html>