cesiumDemo/Source/Workers/PrimitivePipeline-a17c18d8.js

/* This file is automatically rebuilt by the Cesium build process. */
define(['exports', './defined-26bd4a03', './Check-da037458', './defaultValue-f2e68450', './Cartesian2-2a723276', './defineProperties-6f7a50f2', './Transforms-65aba0a4', './ComponentDatatype-69643096', './GeometryAttribute-ed359d71', './GeometryAttributes-eecc9f43', './GeometryPipeline-f0b16df6', './IndexDatatype-3de60176', './WebMercatorProjection-f2dc467d'], function (exports, defined, Check, defaultValue, Cartesian2, defineProperties, Transforms, ComponentDatatype, GeometryAttribute, GeometryAttributes, GeometryPipeline, IndexDatatype, WebMercatorProjection) { 'use strict';

    /**
         * Value and type information for per-instance geometry attribute that determines the geometry instance offset
         *
         * @alias OffsetGeometryInstanceAttribute
         * @constructor
         *
         * @param {Number} [x=0] The x translation
         * @param {Number} [y=0] The y translation
         * @param {Number} [z=0] The z translation
         *
         * @private
         *
         * @see GeometryInstance
         * @see GeometryInstanceAttribute
         */
        function OffsetGeometryInstanceAttribute(x, y, z) {
            x = defaultValue.defaultValue(x, 0);
            y = defaultValue.defaultValue(y, 0);
            z = defaultValue.defaultValue(z, 0);

            /**
             * The values for the attributes stored in a typed array.
             *
             * @type Float32Array
             */
            this.value = new Float32Array([x, y, z]);
        }

        defineProperties.defineProperties(OffsetGeometryInstanceAttribute.prototype, {
            /**
             * The datatype of each component in the attribute, e.g., individual elements in
             * {@link OffsetGeometryInstanceAttribute#value}.
             *
             * @memberof OffsetGeometryInstanceAttribute.prototype
             *
             * @type {ComponentDatatype}
             * @readonly
             *
             * @default {@link ComponentDatatype.FLOAT}
             */
            componentDatatype : {
                get : function() {
                    return ComponentDatatype.ComponentDatatype.FLOAT;
                }
            },

            /**
             * The number of components in the attributes, i.e., {@link OffsetGeometryInstanceAttribute#value}.
             *
             * @memberof OffsetGeometryInstanceAttribute.prototype
             *
             * @type {Number}
             * @readonly
             *
             * @default 3
             */
            componentsPerAttribute : {
                get : function() {
                    return 3;
                }
            },

            /**
             * When <code>true</code> and <code>componentDatatype</code> is an integer format,
             * indicate that the components should be mapped to the range [0, 1] (unsigned)
             * or [-1, 1] (signed) when they are accessed as floating-point for rendering.
             *
             * @memberof OffsetGeometryInstanceAttribute.prototype
             *
             * @type {Boolean}
             * @readonly
             *
             * @default false
             */
            normalize : {
                get : function() {
                    return false;
                }
            }
        });

        /**
         * Creates a new {@link OffsetGeometryInstanceAttribute} instance given the provided an enabled flag and {@link DistanceDisplayCondition}.
         *
         * @param {Cartesian3} offset The cartesian offset
         * @returns {OffsetGeometryInstanceAttribute} The new {@link OffsetGeometryInstanceAttribute} instance.
         */
        OffsetGeometryInstanceAttribute.fromCartesian3 = function(offset) {
            //>>includeStart('debug', pragmas.debug);
            Check.Check.defined('offset', offset);
            //>>includeEnd('debug');

            return new OffsetGeometryInstanceAttribute(offset.x, offset.y, offset.z);
        };

        /**
         * Converts a distance display condition to a typed array that can be used to assign a distance display condition attribute.
         *
         * @param {Cartesian3} offset The cartesian offset
         * @param {Float32Array} [result] The array to store the result in, if undefined a new instance will be created.
         * @returns {Float32Array} The modified result parameter or a new instance if result was undefined.
         *
         * @example
         * var attributes = primitive.getGeometryInstanceAttributes('an id');
         * attributes.modelMatrix = Cesium.OffsetGeometryInstanceAttribute.toValue(modelMatrix, attributes.modelMatrix);
         */
        OffsetGeometryInstanceAttribute.toValue = function(offset, result) {
            //>>includeStart('debug', pragmas.debug);
            Check.Check.defined('offset', offset);
            //>>includeEnd('debug');

            if (!defined.defined(result)) {
                result = new Float32Array([offset.x, offset.y, offset.z]);
            }

            result[0] = offset.x;
            result[1] = offset.y;
            result[2] = offset.z;
            return result;
        };

    function transformToWorldCoordinates(instances, primitiveModelMatrix, scene3DOnly) {
            var toWorld = !scene3DOnly;
            var length = instances.length;
            var i;

            if (!toWorld && (length > 1)) {
                var modelMatrix = instances[0].modelMatrix;

                for (i = 1; i < length; ++i) {
                    if (!Transforms.Matrix4.equals(modelMatrix, instances[i].modelMatrix)) {
                        toWorld = true;
                        break;
                    }
                }
            }

            if (toWorld) {
                for (i = 0; i < length; ++i) {
                    if (defined.defined(instances[i].geometry)) {
                        GeometryPipeline.GeometryPipeline.transformToWorldCoordinates(instances[i]);
                    }
                }
            } else {
                // Leave geometry in local coordinate system; auto update model-matrix.
                Transforms.Matrix4.multiplyTransformation(primitiveModelMatrix, instances[0].modelMatrix, primitiveModelMatrix);
            }
        }

        function addGeometryBatchId(geometry, batchId) {
            var attributes = geometry.attributes;
            var positionAttr = attributes.position;
            var numberOfComponents = positionAttr.values.length / positionAttr.componentsPerAttribute;

            attributes.batchId = new GeometryAttribute.GeometryAttribute({
                componentDatatype : ComponentDatatype.ComponentDatatype.FLOAT,
                componentsPerAttribute : 1,
                values : new Float32Array(numberOfComponents)
            });

            var values = attributes.batchId.values;
            for (var j = 0; j < numberOfComponents; ++j) {
                values[j] = batchId;
            }
        }

        function addBatchIds(instances) {
            var length = instances.length;

            for (var i = 0; i < length; ++i) {
                var instance = instances[i];
                if (defined.defined(instance.geometry)) {
                    addGeometryBatchId(instance.geometry, i);
                } else if (defined.defined(instance.westHemisphereGeometry) && defined.defined(instance.eastHemisphereGeometry)) {
                    addGeometryBatchId(instance.westHemisphereGeometry, i);
                    addGeometryBatchId(instance.eastHemisphereGeometry, i);
                }
            }
        }

        function geometryPipeline(parameters) {
            var instances = parameters.instances;
            var projection = parameters.projection;
            var uintIndexSupport = parameters.elementIndexUintSupported;
            var scene3DOnly = parameters.scene3DOnly;
            var vertexCacheOptimize = parameters.vertexCacheOptimize;
            var compressVertices = parameters.compressVertices;
            var modelMatrix = parameters.modelMatrix;

            var i;
            var geometry;
            var primitiveType;
            var length = instances.length;

            for (i = 0; i < length; ++i) {
                if (defined.defined(instances[i].geometry)) {
                    primitiveType = instances[i].geometry.primitiveType;
                    break;
                }
            }

            //>>includeStart('debug', pragmas.debug);
            for (i = 1; i < length; ++i) {
                if (defined.defined(instances[i].geometry) && instances[i].geometry.primitiveType !== primitiveType) {
                    throw new Check.DeveloperError('All instance geometries must have the same primitiveType.');
                }
            }
            //>>includeEnd('debug');

            // Unify to world coordinates before combining.
            transformToWorldCoordinates(instances, modelMatrix, scene3DOnly);

            // Clip to IDL
            if (!scene3DOnly) {
                for (i = 0; i < length; ++i) {
                    if (defined.defined(instances[i].geometry)) {
                        GeometryPipeline.GeometryPipeline.splitLongitude(instances[i]);
                    }
                }
            }

            addBatchIds(instances);

            // Optimize for vertex shader caches
            if (vertexCacheOptimize) {
                for (i = 0; i < length; ++i) {
                    var instance = instances[i];
                    if (defined.defined(instance.geometry)) {
                        GeometryPipeline.GeometryPipeline.reorderForPostVertexCache(instance.geometry);
                        GeometryPipeline.GeometryPipeline.reorderForPreVertexCache(instance.geometry);
                    } else if (defined.defined(instance.westHemisphereGeometry) && defined.defined(instance.eastHemisphereGeometry)) {
                        GeometryPipeline.GeometryPipeline.reorderForPostVertexCache(instance.westHemisphereGeometry);
                        GeometryPipeline.GeometryPipeline.reorderForPreVertexCache(instance.westHemisphereGeometry);

                        GeometryPipeline.GeometryPipeline.reorderForPostVertexCache(instance.eastHemisphereGeometry);
                        GeometryPipeline.GeometryPipeline.reorderForPreVertexCache(instance.eastHemisphereGeometry);
                    }
                }
            }

            // Combine into single geometry for better rendering performance.
            var geometries = GeometryPipeline.GeometryPipeline.combineInstances(instances);

            length = geometries.length;
            for (i = 0; i < length; ++i) {
                geometry = geometries[i];

                // Split positions for GPU RTE
                var attributes = geometry.attributes;
                var name;
                if (!scene3DOnly) {
                    for (name in attributes) {
                        if (attributes.hasOwnProperty(name) && attributes[name].componentDatatype === ComponentDatatype.ComponentDatatype.DOUBLE) {
                            var name3D = name + '3D';
                            var name2D = name + '2D';

                            // Compute 2D positions
                            GeometryPipeline.GeometryPipeline.projectTo2D(geometry, name, name3D, name2D, projection);
                            if (defined.defined(geometry.boundingSphere) && name === 'position') {
                                geometry.boundingSphereCV = Transforms.BoundingSphere.fromVertices(geometry.attributes.position2D.values);
                            }

                            GeometryPipeline.GeometryPipeline.encodeAttribute(geometry, name3D, name3D + 'High', name3D + 'Low');
                            GeometryPipeline.GeometryPipeline.encodeAttribute(geometry, name2D, name2D + 'High', name2D + 'Low');
                        }
                    }
                } else {
                    for (name in attributes) {
                        if (attributes.hasOwnProperty(name) && attributes[name].componentDatatype === ComponentDatatype.ComponentDatatype.DOUBLE) {
                            GeometryPipeline.GeometryPipeline.encodeAttribute(geometry, name, name + '3DHigh', name + '3DLow');
                        }
                    }
                }

                // oct encode and pack normals, compress texture coordinates
                if (compressVertices) {
                    GeometryPipeline.GeometryPipeline.compressVertices(geometry);
                }
            }

            if (!uintIndexSupport) {
                // Break into multiple geometries to fit within unsigned short indices if needed
                var splitGeometries = [];
                length = geometries.length;
                for (i = 0; i < length; ++i) {
                    geometry = geometries[i];
                    splitGeometries = splitGeometries.concat(GeometryPipeline.GeometryPipeline.fitToUnsignedShortIndices(geometry));
                }

                geometries = splitGeometries;
            }

            return geometries;
        }

        function createPickOffsets(instances, geometryName, geometries, pickOffsets) {
            var offset;
            var indexCount;
            var geometryIndex;

            var offsetIndex = pickOffsets.length - 1;
            if (offsetIndex >= 0) {
                var pickOffset = pickOffsets[offsetIndex];
                offset = pickOffset.offset + pickOffset.count;
                geometryIndex = pickOffset.index;
                indexCount = geometries[geometryIndex].indices.length;
            } else {
                offset = 0;
                geometryIndex = 0;
                indexCount = geometries[geometryIndex].indices.length;
            }

            var length = instances.length;
            for (var i = 0; i < length; ++i) {
                var instance = instances[i];
                var geometry = instance[geometryName];
                if (!defined.defined(geometry)) {
                    continue;
                }

                var count = geometry.indices.length;

                if (offset + count > indexCount) {
                    offset = 0;
                    indexCount = geometries[++geometryIndex].indices.length;
                }

                pickOffsets.push({
                    index : geometryIndex,
                    offset : offset,
                    count : count
                });
                offset += count;
            }
        }

        function createInstancePickOffsets(instances, geometries) {
            var pickOffsets = [];
            createPickOffsets(instances, 'geometry', geometries, pickOffsets);
            createPickOffsets(instances, 'westHemisphereGeometry', geometries, pickOffsets);
            createPickOffsets(instances, 'eastHemisphereGeometry', geometries, pickOffsets);
            return pickOffsets;
        }

        /**
         * @private
         */
        var PrimitivePipeline = {};

        /**
         * @private
         */
        PrimitivePipeline.combineGeometry = function(parameters) {
            var geometries;
            var attributeLocations;
            var instances = parameters.instances;
            var length = instances.length;
            var pickOffsets;

            var offsetInstanceExtend;
            var hasOffset = false;
            if (length > 0) {
                geometries = geometryPipeline(parameters);
                if (geometries.length > 0) {
                    attributeLocations = GeometryPipeline.GeometryPipeline.createAttributeLocations(geometries[0]);
                    if (parameters.createPickOffsets) {
                        pickOffsets = createInstancePickOffsets(instances, geometries);
                    }
                }
                if (defined.defined(instances[0].attributes) && defined.defined(instances[0].attributes.offset)) {
                    offsetInstanceExtend = new Array(length);
                    hasOffset = true;
                }
            }

            var boundingSpheres = new Array(length);
            var boundingSpheresCV = new Array(length);
            for (var i = 0; i < length; ++i) {
                var instance = instances[i];
                var geometry = instance.geometry;
                if (defined.defined(geometry)) {
                    boundingSpheres[i] = geometry.boundingSphere;
                    boundingSpheresCV[i] = geometry.boundingSphereCV;
                    if (hasOffset) {
                        offsetInstanceExtend[i] = instance.geometry.offsetAttribute;
                    }
                }

                var eastHemisphereGeometry = instance.eastHemisphereGeometry;
                var westHemisphereGeometry = instance.westHemisphereGeometry;
                if (defined.defined(eastHemisphereGeometry) && defined.defined(westHemisphereGeometry)) {
                    if (defined.defined(eastHemisphereGeometry.boundingSphere) && defined.defined(westHemisphereGeometry.boundingSphere)) {
                        boundingSpheres[i] = Transforms.BoundingSphere.union(eastHemisphereGeometry.boundingSphere, westHemisphereGeometry.boundingSphere);
                    }
                    if (defined.defined(eastHemisphereGeometry.boundingSphereCV) && defined.defined(westHemisphereGeometry.boundingSphereCV)) {
                        boundingSpheresCV[i] = Transforms.BoundingSphere.union(eastHemisphereGeometry.boundingSphereCV, westHemisphereGeometry.boundingSphereCV);
                    }
                }
            }

            return {
                geometries : geometries,
                modelMatrix : parameters.modelMatrix,
                attributeLocations : attributeLocations,
                pickOffsets : pickOffsets,
                offsetInstanceExtend : offsetInstanceExtend,
                boundingSpheres : boundingSpheres,
                boundingSpheresCV : boundingSpheresCV
            };
        };

        function transferGeometry(geometry, transferableObjects) {
            var attributes = geometry.attributes;
            for (var name in attributes) {
                if (attributes.hasOwnProperty(name)) {
                    var attribute = attributes[name];

                    if (defined.defined(attribute) && defined.defined(attribute.values)) {
                        transferableObjects.push(attribute.values.buffer);
                    }
                }
            }

            if (defined.defined(geometry.indices)) {
                transferableObjects.push(geometry.indices.buffer);
            }
        }

        function transferGeometries(geometries, transferableObjects) {
            var length = geometries.length;
            for (var i = 0; i < length; ++i) {
                transferGeometry(geometries[i], transferableObjects);
            }
        }

        // This function was created by simplifying packCreateGeometryResults into a count-only operation.
        function countCreateGeometryResults(items) {
            var count = 1;
            var length = items.length;
            for (var i = 0; i < length; i++) {
                var geometry = items[i];
                ++count;

                if (!defined.defined(geometry)) {
                    continue;
                }

                var attributes = geometry.attributes;

                count += 7 + 2 * Transforms.BoundingSphere.packedLength + (defined.defined(geometry.indices) ? geometry.indices.length : 0);

                for (var property in attributes) {
                    if (attributes.hasOwnProperty(property) && defined.defined(attributes[property])) {
                        var attribute = attributes[property];
                        count += 5 + attribute.values.length;
                    }
                }
            }

            return count;
        }

        /**
         * @private
         */
        PrimitivePipeline.packCreateGeometryResults = function(items, transferableObjects) {
            var packedData = new Float64Array(countCreateGeometryResults(items));
            var stringTable = [];
            var stringHash = {};

            var length = items.length;
            var count = 0;
            packedData[count++] = length;
            for (var i = 0; i < length; i++) {
                var geometry = items[i];

                var validGeometry = defined.defined(geometry);
                packedData[count++] = validGeometry ? 1.0 : 0.0;

                if (!validGeometry) {
                    continue;
                }

                packedData[count++] = geometry.primitiveType;
                packedData[count++] = geometry.geometryType;
                packedData[count++] = defaultValue.defaultValue(geometry.offsetAttribute, -1);

                var validBoundingSphere = defined.defined(geometry.boundingSphere) ? 1.0 : 0.0;
                packedData[count++] = validBoundingSphere;
                if (validBoundingSphere) {
                    Transforms.BoundingSphere.pack(geometry.boundingSphere, packedData, count);
                }

                count += Transforms.BoundingSphere.packedLength;

                var validBoundingSphereCV = defined.defined(geometry.boundingSphereCV) ? 1.0 : 0.0;
                packedData[count++] = validBoundingSphereCV;
                if (validBoundingSphereCV) {
                    Transforms.BoundingSphere.pack(geometry.boundingSphereCV, packedData, count);
                }

                count += Transforms.BoundingSphere.packedLength;

                var attributes = geometry.attributes;
                var attributesToWrite = [];
                for (var property in attributes) {
                    if (attributes.hasOwnProperty(property) && defined.defined(attributes[property])) {
                        attributesToWrite.push(property);
                        if (!defined.defined(stringHash[property])) {
                            stringHash[property] = stringTable.length;
                            stringTable.push(property);
                        }
                    }
                }

                packedData[count++] = attributesToWrite.length;
                for (var q = 0; q < attributesToWrite.length; q++) {
                    var name = attributesToWrite[q];
                    var attribute = attributes[name];
                    packedData[count++] = stringHash[name];
                    packedData[count++] = attribute.componentDatatype;
                    packedData[count++] = attribute.componentsPerAttribute;
                    packedData[count++] = attribute.normalize ? 1 : 0;
                    packedData[count++] = attribute.values.length;
                    packedData.set(attribute.values, count);
                    count += attribute.values.length;
                }

                var indicesLength = defined.defined(geometry.indices) ? geometry.indices.length : 0;
                packedData[count++] = indicesLength;

                if (indicesLength > 0) {
                    packedData.set(geometry.indices, count);
                    count += indicesLength;
                }
            }

            transferableObjects.push(packedData.buffer);

            return {
                stringTable : stringTable,
                packedData : packedData
            };
        };

        /**
         * @private
         */
        PrimitivePipeline.unpackCreateGeometryResults = function(createGeometryResult) {
            var stringTable = createGeometryResult.stringTable;
            var packedGeometry = createGeometryResult.packedData;

            var i;
            var result = new Array(packedGeometry[0]);
            var resultIndex = 0;

            var packedGeometryIndex = 1;
            while (packedGeometryIndex < packedGeometry.length) {
                var valid = packedGeometry[packedGeometryIndex++] === 1.0;
                if (!valid) {
                    result[resultIndex++] = undefined;
                    continue;
                }

                var primitiveType = packedGeometry[packedGeometryIndex++];
                var geometryType = packedGeometry[packedGeometryIndex++];
                var offsetAttribute = packedGeometry[packedGeometryIndex++];
                if (offsetAttribute === -1) {
                    offsetAttribute = undefined;
                }

                var boundingSphere;
                var boundingSphereCV;

                var validBoundingSphere = packedGeometry[packedGeometryIndex++] === 1.0;
                if (validBoundingSphere) {
                    boundingSphere = Transforms.BoundingSphere.unpack(packedGeometry, packedGeometryIndex);
                }

                packedGeometryIndex += Transforms.BoundingSphere.packedLength;

                var validBoundingSphereCV = packedGeometry[packedGeometryIndex++] === 1.0;
                if (validBoundingSphereCV) {
                    boundingSphereCV = Transforms.BoundingSphere.unpack(packedGeometry, packedGeometryIndex);
                }

                packedGeometryIndex += Transforms.BoundingSphere.packedLength;

                var length;
                var values;
                var componentsPerAttribute;
                var attributes = new GeometryAttributes.GeometryAttributes();
                var numAttributes = packedGeometry[packedGeometryIndex++];
                for (i = 0; i < numAttributes; i++) {
                    var name = stringTable[packedGeometry[packedGeometryIndex++]];
                    var componentDatatype = packedGeometry[packedGeometryIndex++];
                    componentsPerAttribute = packedGeometry[packedGeometryIndex++];
                    var normalize = packedGeometry[packedGeometryIndex++] !== 0;

                    length = packedGeometry[packedGeometryIndex++];
                    values = ComponentDatatype.ComponentDatatype.createTypedArray(componentDatatype, length);
                    for (var valuesIndex = 0; valuesIndex < length; valuesIndex++) {
                        values[valuesIndex] = packedGeometry[packedGeometryIndex++];
                    }

                    attributes[name] = new GeometryAttribute.GeometryAttribute({
                        componentDatatype : componentDatatype,
                        componentsPerAttribute : componentsPerAttribute,
                        normalize : normalize,
                        values : values
                    });
                }

                var indices;
                length = packedGeometry[packedGeometryIndex++];

                if (length > 0) {
                    var numberOfVertices = values.length / componentsPerAttribute;
                    indices = IndexDatatype.IndexDatatype.createTypedArray(numberOfVertices, length);
                    for (i = 0; i < length; i++) {
                        indices[i] = packedGeometry[packedGeometryIndex++];
                    }
                }

                result[resultIndex++] = new GeometryAttribute.Geometry({
                    primitiveType : primitiveType,
                    geometryType : geometryType,
                    boundingSphere : boundingSphere,
                    boundingSphereCV : boundingSphereCV,
                    indices : indices,
                    attributes : attributes,
                    offsetAttribute: offsetAttribute
                });
            }

            return result;
        };

        function packInstancesForCombine(instances, transferableObjects) {
            var length = instances.length;
            var packedData = new Float64Array(1 + (length * 19));
            var count = 0;
            packedData[count++] = length;
            for (var i = 0; i < length; i++) {
                var instance = instances[i];
                Transforms.Matrix4.pack(instance.modelMatrix, packedData, count);
                count += Transforms.Matrix4.packedLength;
                if (defined.defined(instance.attributes) && defined.defined(instance.attributes.offset)) {
                    var values = instance.attributes.offset.value;
                    packedData[count] = values[0];
                    packedData[count + 1] = values[1];
                    packedData[count + 2] = values[2];
                }
                count += 3;
            }
            transferableObjects.push(packedData.buffer);

            return packedData;
        }

        function unpackInstancesForCombine(data) {
            var packedInstances = data;
            var result = new Array(packedInstances[0]);
            var count = 0;

            var i = 1;
            while (i < packedInstances.length) {
                var modelMatrix = Transforms.Matrix4.unpack(packedInstances, i);
                var attributes;
                i += Transforms.Matrix4.packedLength;
                if (defined.defined(packedInstances[i])) {
                    attributes = {
                        offset : new OffsetGeometryInstanceAttribute(packedInstances[i], packedInstances[i + 1], packedInstances[i + 2])
                    };
                }
                i += 3;

                result[count++] = {
                    modelMatrix : modelMatrix,
                    attributes : attributes
                };
            }

            return result;
        }

        /**
         * @private
         */
        PrimitivePipeline.packCombineGeometryParameters = function(parameters, transferableObjects) {
            var createGeometryResults = parameters.createGeometryResults;
            var length = createGeometryResults.length;

            for (var i = 0; i < length; i++) {
                transferableObjects.push(createGeometryResults[i].packedData.buffer);
            }

            return {
                createGeometryResults : parameters.createGeometryResults,
                packedInstances : packInstancesForCombine(parameters.instances, transferableObjects),
                ellipsoid : parameters.ellipsoid,
                isGeographic : parameters.projection instanceof Transforms.GeographicProjection,
                elementIndexUintSupported : parameters.elementIndexUintSupported,
                scene3DOnly : parameters.scene3DOnly,
                vertexCacheOptimize : parameters.vertexCacheOptimize,
                compressVertices : parameters.compressVertices,
                modelMatrix : parameters.modelMatrix,
                createPickOffsets : parameters.createPickOffsets
            };
        };

        /**
         * @private
         */
        PrimitivePipeline.unpackCombineGeometryParameters = function(packedParameters) {
            var instances = unpackInstancesForCombine(packedParameters.packedInstances);
            var createGeometryResults = packedParameters.createGeometryResults;
            var length = createGeometryResults.length;
            var instanceIndex = 0;

            for (var resultIndex = 0; resultIndex < length; resultIndex++) {
                var geometries = PrimitivePipeline.unpackCreateGeometryResults(createGeometryResults[resultIndex]);
                var geometriesLength = geometries.length;
                for (var geometryIndex = 0; geometryIndex < geometriesLength; geometryIndex++) {
                    var geometry = geometries[geometryIndex];
                    var instance = instances[instanceIndex];
                    instance.geometry = geometry;
                    ++instanceIndex;
                }
            }

            var ellipsoid = Cartesian2.Ellipsoid.clone(packedParameters.ellipsoid);
            var projection = packedParameters.isGeographic ? new Transforms.GeographicProjection(ellipsoid) : new WebMercatorProjection.WebMercatorProjection(ellipsoid);

            return {
                instances : instances,
                ellipsoid : ellipsoid,
                projection : projection,
                elementIndexUintSupported : packedParameters.elementIndexUintSupported,
                scene3DOnly : packedParameters.scene3DOnly,
                vertexCacheOptimize : packedParameters.vertexCacheOptimize,
                compressVertices : packedParameters.compressVertices,
                modelMatrix : Transforms.Matrix4.clone(packedParameters.modelMatrix),
                createPickOffsets : packedParameters.createPickOffsets
            };
        };

        function packBoundingSpheres(boundingSpheres) {
            var length = boundingSpheres.length;
            var bufferLength = 1 + (Transforms.BoundingSphere.packedLength + 1) * length;
            var buffer = new Float32Array(bufferLength);

            var bufferIndex = 0;
            buffer[bufferIndex++] = length;

            for (var i = 0; i < length; ++i) {
                var bs = boundingSpheres[i];
                if (!defined.defined(bs)) {
                    buffer[bufferIndex++] = 0.0;
                } else {
                    buffer[bufferIndex++] = 1.0;
                    Transforms.BoundingSphere.pack(boundingSpheres[i], buffer, bufferIndex);
                }
                bufferIndex += Transforms.BoundingSphere.packedLength;
            }

            return buffer;
        }

        function unpackBoundingSpheres(buffer) {
            var result = new Array(buffer[0]);
            var count = 0;

            var i = 1;
            while (i < buffer.length) {
                if (buffer[i++] === 1.0) {
                    result[count] = Transforms.BoundingSphere.unpack(buffer, i);
                }
                ++count;
                i += Transforms.BoundingSphere.packedLength;
            }

            return result;
        }

        /**
         * @private
         */
        PrimitivePipeline.packCombineGeometryResults = function(results, transferableObjects) {
            if (defined.defined(results.geometries)) {
                transferGeometries(results.geometries, transferableObjects);
            }

            var packedBoundingSpheres = packBoundingSpheres(results.boundingSpheres);
            var packedBoundingSpheresCV = packBoundingSpheres(results.boundingSpheresCV);
            transferableObjects.push(packedBoundingSpheres.buffer, packedBoundingSpheresCV.buffer);

            return {
                geometries : results.geometries,
                attributeLocations : results.attributeLocations,
                modelMatrix : results.modelMatrix,
                pickOffsets : results.pickOffsets,
                offsetInstanceExtend: results.offsetInstanceExtend,
                boundingSpheres : packedBoundingSpheres,
                boundingSpheresCV : packedBoundingSpheresCV
            };
        };

        /**
         * @private
         */
        PrimitivePipeline.unpackCombineGeometryResults = function(packedResult) {
            return {
                geometries : packedResult.geometries,
                attributeLocations : packedResult.attributeLocations,
                modelMatrix : packedResult.modelMatrix,
                pickOffsets : packedResult.pickOffsets,
                offsetInstanceExtend: packedResult.offsetInstanceExtend,
                boundingSpheres : unpackBoundingSpheres(packedResult.boundingSpheres),
                boundingSpheresCV : unpackBoundingSpheres(packedResult.boundingSpheresCV)
            };
        };

    exports.PrimitivePipeline = PrimitivePipeline;

});