Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 1x 1x 77x 77x 77x 77x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 8x 1x 83x 83x 83x 1x 83x 83x 83x 83x 83x 83x 1x 111x 111x 1x 81x 81x 81x 81x 81x 81x 81x 81x 81x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 18x 63x 81x 81x 81x 63x 18x 18x 18x 18x 18x 36x 36x 36x 1x 1x 81x 81x 26x 26x 26x 1x 1x 12x 12x 12x 12x 12x 12x 12x 12x 12x 12x 1x 170x 170x 170x 170x | import binarySearch from "../Core/binarySearch.js";
import Cartesian3 from "../Core/Cartesian3.js";
import CesiumMath from "../Core/Math.js";
import defined from "../Core/defined.js";
import DeveloperError from "../Core/DeveloperError.js";
import KeyframeNode from "./KeyframeNode.js";
import Matrix3 from "../Core/Matrix3.js";
import OrientedBoundingBox from "../Core/OrientedBoundingBox.js";
/**
* @alias SpatialNode
* @constructor
*
* @param {number} level
* @param {number} x
* @param {number} y
* @param {number} z
* @param {SpatialNode} parent
* @param {VoxelShape} shape
* @param {Cartesian3} voxelDimensions
*
* @private
*/
function SpatialNode(level, x, y, z, parent, shape, voxelDimensions) {
/**
* @type {SpatialNode[]}
*/
this.children = undefined;
this.parent = parent;
this.level = level;
this.x = x;
this.y = y;
this.z = z;
/**
* @type {Cartesian3}
*/
this.dimensions = Cartesian3.clone(voxelDimensions);
/**
* @type {KeyframeNode[]}
*/
this.keyframeNodes = [];
/**
* @type {KeyframeNode[]}
*/
this.renderableKeyframeNodes = [];
this.renderableKeyframeNodeLerp = 0.0;
/**
* @type {KeyframeNode}
*/
this.renderableKeyframeNodePrevious = undefined;
/**
* @type {KeyframeNode}
*/
this.renderableKeyframeNodeNext = undefined;
this.orientedBoundingBox = new OrientedBoundingBox();
this.approximateVoxelSize = 0.0;
this.screenSpaceError = 0.0;
this.visitedFrameNumber = -1;
this.computeBoundingVolumes(shape);
}
const scratchObbHalfScale = new Cartesian3();
/**
* @param {VoxelShape} shape
*/
SpatialNode.prototype.computeBoundingVolumes = function (shape) {
this.orientedBoundingBox = shape.computeOrientedBoundingBoxForTile(
this.level,
this.x,
this.y,
this.z,
this.orientedBoundingBox,
);
const halfScale = Matrix3.getScale(
this.orientedBoundingBox.halfAxes,
scratchObbHalfScale,
);
const maximumScale = 2.0 * Cartesian3.maximumComponent(halfScale);
this.approximateVoxelSize =
maximumScale / Cartesian3.minimumComponent(this.dimensions);
};
/**
* @param {VoxelShape} shape The shape of the parent VoxelPrimitive
* @private
*/
SpatialNode.prototype.constructChildNodes = function (shape) {
const { level, x, y, z } = this;
const xMin = x * 2;
const yMin = y * 2;
const zMin = z * 2;
const yMax = yMin + 1;
const xMax = xMin + 1;
const zMax = zMin + 1;
const childLevel = level + 1;
const childCoords = [
[childLevel, xMin, yMin, zMin],
[childLevel, xMax, yMin, zMin],
[childLevel, xMin, yMax, zMin],
[childLevel, xMax, yMax, zMin],
[childLevel, xMin, yMin, zMax],
[childLevel, xMax, yMin, zMax],
[childLevel, xMin, yMax, zMax],
[childLevel, xMax, yMax, zMax],
];
this.children = childCoords.map(([level, x, y, z]) => {
return new SpatialNode(level, x, y, z, this, shape, this.dimensions);
});
};
/**
* @param {FrameState} frameState
* @param {number} visibilityPlaneMask
* @returns {number} A plane mask as described in {@link CullingVolume#computeVisibilityWithPlaneMask}.
*/
SpatialNode.prototype.visibility = function (frameState, visibilityPlaneMask) {
const obb = this.orientedBoundingBox;
const cullingVolume = frameState.cullingVolume;
return cullingVolume.computeVisibilityWithPlaneMask(obb, visibilityPlaneMask);
};
/**
* @param {Cartesian3} cameraPosition
* @param {number} screenSpaceErrorMultiplier
*/
SpatialNode.prototype.computeScreenSpaceError = function (
cameraPosition,
screenSpaceErrorMultiplier,
) {
const obb = this.orientedBoundingBox;
let distance = Math.sqrt(obb.distanceSquaredTo(cameraPosition));
// Avoid divide-by-zero when viewer is inside the tile.
distance = Math.max(distance, CesiumMath.EPSILON7);
const approximateVoxelSize = this.approximateVoxelSize;
const error = screenSpaceErrorMultiplier * (approximateVoxelSize / distance);
this.screenSpaceError = error;
};
// This object imitates a KeyframeNode. Only used for binary search function.
const scratchBinarySearchKeyframeNode = {
keyframe: 0,
};
/**
* Find the index of a given key frame position within an array of KeyframeNodes,
* or the complement (~) of the index where it would be in the sorted array.
* @param {number} keyframe
* @param {KeyframeNode[]} keyframeNodes
* @returns {number}
* @private
*/
function findKeyframeIndex(keyframe, keyframeNodes) {
scratchBinarySearchKeyframeNode.keyframe = keyframe;
return binarySearch(
keyframeNodes,
scratchBinarySearchKeyframeNode,
KeyframeNode.searchComparator,
);
}
/**
* Computes the most suitable keyframes for rendering, balancing between temporal and visual quality.
*
* @param {number} keyframeLocation
*/
SpatialNode.prototype.computeSurroundingRenderableKeyframeNodes = function (
keyframeLocation,
) {
let spatialNode = this;
const startLevel = spatialNode.level;
const targetKeyframePrev = Math.floor(keyframeLocation);
const targetKeyframeNext = Math.ceil(keyframeLocation);
let bestKeyframeNodePrev;
let bestKeyframeNodeNext;
let minimumDistancePrev = +Number.MAX_VALUE;
let minimumDistanceNext = +Number.MAX_VALUE;
while (defined(spatialNode)) {
const { renderableKeyframeNodes } = spatialNode;
if (renderableKeyframeNodes.length >= 1) {
const indexPrev = getKeyframeIndexPrev(
targetKeyframePrev,
renderableKeyframeNodes,
);
const keyframeNodePrev = renderableKeyframeNodes[indexPrev];
const indexNext =
targetKeyframeNext === targetKeyframePrev ||
targetKeyframePrev < keyframeNodePrev.keyframe
? indexPrev
: Math.min(indexPrev + 1, renderableKeyframeNodes.length - 1);
const keyframeNodeNext = renderableKeyframeNodes[indexNext];
const distancePrev = targetKeyframePrev - keyframeNodePrev.keyframe;
const weightedDistancePrev = getWeightedKeyframeDistance(
startLevel - spatialNode.level,
distancePrev,
);
Eif (weightedDistancePrev < minimumDistancePrev) {
minimumDistancePrev = weightedDistancePrev;
bestKeyframeNodePrev = keyframeNodePrev;
}
const distanceNext = keyframeNodeNext.keyframe - targetKeyframeNext;
const weightedDistanceNext = getWeightedKeyframeDistance(
startLevel - spatialNode.level,
distanceNext,
);
Eif (weightedDistanceNext < minimumDistanceNext) {
minimumDistanceNext = weightedDistanceNext;
bestKeyframeNodeNext = keyframeNodeNext;
}
Eif (distancePrev === 0 && distanceNext === 0) {
// Nothing higher up will be better, so break early.
break;
}
}
spatialNode = spatialNode.parent;
}
this.renderableKeyframeNodePrevious = bestKeyframeNodePrev;
this.renderableKeyframeNodeNext = bestKeyframeNodeNext;
if (!defined(bestKeyframeNodePrev) || !defined(bestKeyframeNodeNext)) {
return;
}
const bestKeyframePrev = bestKeyframeNodePrev.keyframe;
const bestKeyframeNext = bestKeyframeNodeNext.keyframe;
this.renderableKeyframeNodeLerp =
bestKeyframePrev === bestKeyframeNext
? 0.0
: CesiumMath.clamp(
(keyframeLocation - bestKeyframePrev) /
(bestKeyframeNext - bestKeyframePrev),
0.0,
1.0,
);
};
function getKeyframeIndexPrev(targetKeyframe, keyframeNodes) {
const keyframeIndex = findKeyframeIndex(targetKeyframe, keyframeNodes);
return keyframeIndex < 0
? CesiumMath.clamp(~keyframeIndex - 1, 0, keyframeNodes.length - 1)
: keyframeIndex;
}
function getWeightedKeyframeDistance(levelDistance, keyframeDistance) {
// Balance quality between visual (levelDistance) and temporal (keyframeDistance)
const levelWeight = Math.exp(levelDistance * 4.0);
// Keyframes on the opposite of the desired direction are deprioritized.
const keyframeWeight = keyframeDistance >= 0 ? 1.0 : -200.0;
return levelDistance * levelWeight + keyframeDistance * keyframeWeight;
}
/**
* @param {number} frameNumber
* @returns {boolean}
*/
SpatialNode.prototype.isVisited = function (frameNumber) {
return this.visitedFrameNumber === frameNumber;
};
/**
* @param {number} keyframe
*/
SpatialNode.prototype.createKeyframeNode = function (keyframe) {
let index = findKeyframeIndex(keyframe, this.keyframeNodes);
if (index < 0) {
index = ~index; // convert to insertion index
const keyframeNode = new KeyframeNode(this, keyframe);
this.keyframeNodes.splice(index, 0, keyframeNode);
}
};
/**
* @param {KeyframeNode} keyframeNode
* @param {Megatexture[]} megatextures
*/
SpatialNode.prototype.destroyKeyframeNode = function (
keyframeNode,
megatextures,
) {
const keyframe = keyframeNode.keyframe;
const keyframeIndex = findKeyframeIndex(keyframe, this.keyframeNodes);
if (keyframeIndex < 0) {
throw new DeveloperError("Keyframe node does not exist.");
}
this.keyframeNodes.splice(keyframeIndex, 1);
if (keyframeNode.megatextureIndex !== -1) {
for (let i = 0; i < megatextures.length; i++) {
megatextures[i].remove(keyframeNode.megatextureIndex);
}
const renderableKeyframeNodeIndex = findKeyframeIndex(
keyframe,
this.renderableKeyframeNodes,
);
if (renderableKeyframeNodeIndex < 0) {
throw new DeveloperError("Renderable keyframe node does not exist.");
}
this.renderableKeyframeNodes.splice(renderableKeyframeNodeIndex, 1);
}
keyframeNode.unload();
};
/**
* @param {KeyframeNode} keyframeNode
* @param {Megatexture[]} megatextures
*/
SpatialNode.prototype.addKeyframeNodeToMegatextures = function (
keyframeNode,
megatextures,
) {
Iif (
keyframeNode.megatextureIndex !== -1 ||
keyframeNode.content.metadata.length !== megatextures.length
) {
throw new DeveloperError("Keyframe node cannot be added to megatexture");
}
const { metadata } = keyframeNode.content;
for (let i = 0; i < megatextures.length; i++) {
const megatexture = megatextures[i];
keyframeNode.megatextureIndex = megatexture.add(metadata[i]);
}
const renderableKeyframeNodes = this.renderableKeyframeNodes;
let renderableKeyframeNodeIndex = findKeyframeIndex(
keyframeNode.keyframe,
renderableKeyframeNodes,
);
Iif (renderableKeyframeNodeIndex >= 0) {
throw new DeveloperError("Keyframe already renderable");
}
renderableKeyframeNodeIndex = ~renderableKeyframeNodeIndex;
renderableKeyframeNodes.splice(renderableKeyframeNodeIndex, 0, keyframeNode);
};
/**
* @param {number} frameNumber
* @returns {boolean}
*/
SpatialNode.prototype.isRenderable = function (frameNumber) {
const previousNode = this.renderableKeyframeNodePrevious;
const nextNode = this.renderableKeyframeNodeNext;
const level = this.level;
return (
defined(previousNode) &&
defined(nextNode) &&
(previousNode.spatialNode.level === level ||
nextNode.spatialNode.level === level) &&
this.visitedFrameNumber === frameNumber
);
};
export default SpatialNode;
|