Skip to content

GitLab

Switch branch/tag
Find file Normal viewHistoryPermalink
Terrain Clipping Planes.html 12.9 KB
Newer Older
Schaaf's avatar
Initial commit  
Schaaf committed
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 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
    />
    <meta
      name="description"
      content="User-defined clipping planes applied to terrain."
    />
    <meta name="cesium-sandcastle-labels" content="Showcases" />
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script
      type="text/javascript"
      src="../../../Build/CesiumUnminified/Cesium.js"
      nomodule
    ></script>
    <script type="module" src="../load-cesium-es6.js"></script>
  </head>
  <body
    class="sandcastle-loading"
    data-sandcastle-bucket="bucket-requirejs.html"
  >
    <style>
      @import url(../templates/bucket.css);
      #toolbar {
        background: rgba(42, 42, 42, 0.8);
        padding: 4px;
        border-radius: 4px;
      }
      #toolbar input {
        vertical-align: middle;
        padding-top: 2px;
        padding-bottom: 2px;
      }
    </style>
    <div id="cesiumContainer" class="fullSize"></div>
    <div id="loadingOverlay"><h1>Loading...</h1></div>
    <div id="toolbar">
      <select
        data-bind="options: exampleTypes, value: currentExampleType"
      ></select>
      <input
        type="checkbox"
        value="false"
        data-bind="checked: clippingPlanesEnabled, valueUpdate: 'input'"
      />
      Globe clipping planes enabled
      <input
        type="checkbox"
        value="false"
        data-bind="checked: edgeStylingEnabled, valueUpdate: 'input'"
      />
      Edge styling enabled
    </div>
    <script id="cesium_sandcastle_script">
      function startup(Cesium) {
        "use strict";
        //Sandcastle_Begin
        // Use clipping planes to selectively hide parts of the globe surface.

        var viewer = new Cesium.Viewer("cesiumContainer", {
          skyAtmosphere: false,
          shouldAnimate: true,
          terrainProvider: Cesium.createWorldTerrain(),
          scene3DOnly: true,
        });
        var globe = viewer.scene.globe;

        var exampleTypes = [
          "Cesium Man",
          "St. Helens",
          "Grand Canyon Isolated",
        ];
        var viewModel = {
          exampleTypes: exampleTypes,
          currentExampleType: exampleTypes[0],
          clippingPlanesEnabled: true,
          edgeStylingEnabled: true,
        };
        var toolbar = document.getElementById("toolbar");
        Cesium.knockout.track(viewModel);
        Cesium.knockout.applyBindings(viewModel, toolbar);

        // For tracking state when switching exampleTypes
        var clippingPlanesEnabled = true;
        var edgeStylingEnabled = true;

        var tileset;

        loadCesiumMan();

        function reset() {
          viewer.entities.removeAll();
          viewer.scene.primitives.remove(tileset);
        }

        function loadCesiumMan() {
          var position = Cesium.Cartesian3.fromRadians(
            -2.0862979473351286,
            0.6586620013036164,
            1400.0
          );

          var entity = viewer.entities.add({
            position: position,
            box: {
              dimensions: new Cesium.Cartesian3(1400.0, 1400.0, 2800.0),
              material: Cesium.Color.WHITE.withAlpha(0.3),
              outline: true,
              outlineColor: Cesium.Color.WHITE,
            },
          });

          viewer.entities.add({
            position: position,
            model: {
              uri: "../../SampleData/models/CesiumMan/Cesium_Man.glb",
              minimumPixelSize: 128,
              maximumScale: 800,
            },
          });

          globe.depthTestAgainstTerrain = true;
          globe.clippingPlanes = new Cesium.ClippingPlaneCollection({
            modelMatrix: entity.computeModelMatrix(Cesium.JulianDate.now()),
            planes: [
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(1.0, 0.0, 0.0),
                -700.0
              ),
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(-1.0, 0.0, 0.0),
                -700.0
              ),
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(0.0, 1.0, 0.0),
                -700.0
              ),
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(0.0, -1.0, 0.0),
                -700.0
              ),
            ],
            edgeWidth: edgeStylingEnabled ? 1.0 : 0.0,
            edgeColor: Cesium.Color.WHITE,
            enabled: clippingPlanesEnabled,
          });
          globe.backFaceCulling = true;
          globe.showSkirts = true;

          viewer.trackedEntity = entity;
        }

        function loadStHelens() {
          // Create clipping planes for polygon around area to be clipped.
          var points = [
            new Cesium.Cartesian3(
              -2358434.3501556474,
              -3743554.5012105294,
              4581080.771684084
            ),
            new Cesium.Cartesian3(
              -2357886.4482675144,
              -3744467.562778789,
              4581020.9199767085
            ),
            new Cesium.Cartesian3(
              -2357299.84353055,
              -3744954.0879047974,
              4581080.992360969
            ),
            new Cesium.Cartesian3(
              -2356412.05169956,
              -3745385.3013702347,
              4580893.4737207815
            ),
            new Cesium.Cartesian3(
              -2355472.889436636,
              -3745256.5725702164,
              4581252.3128526565
            ),
            new Cesium.Cartesian3(
              -2354385.7458722834,
              -3744319.3823686405,
              4582372.770031389
            ),
            new Cesium.Cartesian3(
              -2353758.788158616,
              -3743051.0128084184,
              4583356.453176038
            ),
            new Cesium.Cartesian3(
              -2353663.8128999653,
              -3741847.9126874236,
              4584079.428665509
            ),
            new Cesium.Cartesian3(
              -2354213.667592133,
              -3740784.50946316,
              4584502.428203525
            ),
            new Cesium.Cartesian3(
              -2355596.239450013,
              -3739901.0226732804,
              4584515.9652557485
            ),
            new Cesium.Cartesian3(
              -2356942.4170108805,
              -3740342.454698685,
              4583686.690694482
            ),
            new Cesium.Cartesian3(
              -2357529.554838029,
              -3740766.995076834,
              4583145.055348843
            ),
            new Cesium.Cartesian3(
              -2358106.017822064,
              -3741439.438418052,
              4582452.293605261
            ),
            new Cesium.Cartesian3(
              -2358539.5426236596,
              -3742680.720902901,
              4581692.0260975715
            ),
          ];

          var pointsLength = points.length;

          // Create center points for each clipping plane
          var clippingPlanes = [];
          for (var i = 0; i < pointsLength; ++i) {
            var nextIndex = (i + 1) % pointsLength;
            var midpoint = Cesium.Cartesian3.add(
              points[i],
              points[nextIndex],
              new Cesium.Cartesian3()
            );
            midpoint = Cesium.Cartesian3.multiplyByScalar(
              midpoint,
              0.5,
              midpoint
            );

            var up = Cesium.Cartesian3.normalize(
              midpoint,
              new Cesium.Cartesian3()
            );
            var right = Cesium.Cartesian3.subtract(
              points[nextIndex],
              midpoint,
              new Cesium.Cartesian3()
            );
            right = Cesium.Cartesian3.normalize(right, right);

            var normal = Cesium.Cartesian3.cross(
              right,
              up,
              new Cesium.Cartesian3()
            );
            normal = Cesium.Cartesian3.normalize(normal, normal);

            // Compute distance by pretending the plane is at the origin
            var originCenteredPlane = new Cesium.Plane(normal, 0.0);
            var distance = Cesium.Plane.getPointDistance(
              originCenteredPlane,
              midpoint
            );

            clippingPlanes.push(new Cesium.ClippingPlane(normal, distance));
          }
          globe.clippingPlanes = new Cesium.ClippingPlaneCollection({
            planes: clippingPlanes,
            edgeWidth: edgeStylingEnabled ? 1.0 : 0.0,
            edgeColor: Cesium.Color.WHITE,
            enabled: clippingPlanesEnabled,
          });
          globe.backFaceCulling = true;
          globe.showSkirts = true;

          // Load tileset
          tileset = new Cesium.Cesium3DTileset({
            url: Cesium.IonResource.fromAssetId(5713),
          });
          return tileset.readyPromise
            .then(function () {
              tileset.pointCloudShading.attenuation = true;

              // Adjust height so tileset is in terrain
              var cartographic = Cesium.Cartographic.fromCartesian(
                tileset.boundingSphere.center
              );
              var surface = Cesium.Cartesian3.fromRadians(
                cartographic.longitude,
                cartographic.latitude,
                0.0
              );
              var offset = Cesium.Cartesian3.fromRadians(
                cartographic.longitude,
                cartographic.latitude,
                -20.0
              );
              var translation = Cesium.Cartesian3.subtract(
                offset,
                surface,
                new Cesium.Cartesian3()
              );
              tileset.modelMatrix = Cesium.Matrix4.fromTranslation(translation);

              tileset.style = new Cesium.Cesium3DTileStyle({
                color: "rgb(207, 255, 207)",
              });

              viewer.scene.primitives.add(tileset);

              var boundingSphere = tileset.boundingSphere;

              var radius = boundingSphere.radius;
              viewer.camera.viewBoundingSphere(
                boundingSphere,
                new Cesium.HeadingPitchRange(0.5, -0.2, radius * 4.0)
              );
              viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
            })
            .otherwise(function (error) {
              throw error;
            });
        }

        function loadGrandCanyon() {
          // Pick a position at the Grand Canyon
          var position = Cesium.Cartographic.toCartesian(
            new Cesium.Cartographic.fromDegrees(-113.2665534, 36.0939345, 100)
          );
          var distance = 3000.0;
          var boundingSphere = new Cesium.BoundingSphere(position, distance);

          globe.clippingPlanes = new Cesium.ClippingPlaneCollection({
            modelMatrix: Cesium.Transforms.eastNorthUpToFixedFrame(position),
            planes: [
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(1.0, 0.0, 0.0),
                distance
              ),
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(-1.0, 0.0, 0.0),
                distance
              ),
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(0.0, 1.0, 0.0),
                distance
              ),
              new Cesium.ClippingPlane(
                new Cesium.Cartesian3(0.0, -1.0, 0.0),
                distance
              ),
            ],
            unionClippingRegions: true,
          });
          globe.backFaceCulling = false;
          globe.showSkirts = false;

          viewer.camera.viewBoundingSphere(
            boundingSphere,
            new Cesium.HeadingPitchRange(0.5, -0.5, boundingSphere.radius * 5.0)
          );
          viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
        }

        Cesium.knockout
          .getObservable(viewModel, "clippingPlanesEnabled")
          .subscribe(function (value) {
            globe.clippingPlanes.enabled = value;
            clippingPlanesEnabled = value;
          });

        Cesium.knockout
          .getObservable(viewModel, "edgeStylingEnabled")
          .subscribe(function (value) {
            edgeStylingEnabled = value;
            globe.clippingPlanes.edgeWidth = edgeStylingEnabled ? 1.0 : 0.0;
          });

        Cesium.knockout
          .getObservable(viewModel, "currentExampleType")
          .subscribe(function (newValue) {
            reset();
            if (newValue === exampleTypes[0]) {
              loadCesiumMan();
            } else if (newValue === exampleTypes[1]) {
              loadStHelens();
            } else if (newValue === exampleTypes[2]) {
              loadGrandCanyon();
            }
          });

        //Sandcastle_End
        Sandcastle.finishedLoading();
      }
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        startup(Cesium);
      }
    </script>
  </body>
</html>

Dies ist die Gitlab-Instanz des Transferportals der Hochschule für Technik Stuttgart. Hier geht es zurück zum Portal