{"version":3,"file":"EncodedCartesian3-da8f96bc.js","sources":["../../../../Source/Core/EncodedCartesian3.js"],"sourcesContent":["import Cartesian3 from \"./Cartesian3.js\";\nimport Check from \"./Check.js\";\nimport defined from \"./defined.js\";\n\n/**\n * A fixed-point encoding of a {@link Cartesian3} with 64-bit floating-point components, as two {@link Cartesian3}\n * values that, when converted to 32-bit floating-point and added, approximate the original input.\n * <p>\n * This is used to encode positions in vertex buffers for rendering without jittering artifacts\n * as described in {@link http://help.agi.com/AGIComponents/html/BlogPrecisionsPrecisions.htm|Precisions, Precisions}.\n * </p>\n *\n * @alias EncodedCartesian3\n * @constructor\n *\n * @private\n */\nfunction EncodedCartesian3() {\n  /**\n   * The high bits for each component.  Bits 0 to 22 store the whole value.  Bits 23 to 31 are not used.\n   *\n   * @type {Cartesian3}\n   * @default {@link Cartesian3.ZERO}\n   */\n  this.high = Cartesian3.clone(Cartesian3.ZERO);\n\n  /**\n   * The low bits for each component.  Bits 7 to 22 store the whole value, and bits 0 to 6 store the fraction.  Bits 23 to 31 are not used.\n   *\n   * @type {Cartesian3}\n   * @default {@link Cartesian3.ZERO}\n   */\n  this.low = Cartesian3.clone(Cartesian3.ZERO);\n}\n\n/**\n * Encodes a 64-bit floating-point value as two floating-point values that, when converted to\n * 32-bit floating-point and added, approximate the original input.  The returned object\n * has <code>high</code> and <code>low</code> properties for the high and low bits, respectively.\n * <p>\n * The fixed-point encoding follows {@link http://help.agi.com/AGIComponents/html/BlogPrecisionsPrecisions.htm|Precisions, Precisions}.\n * </p>\n *\n * @param {Number} value The floating-point value to encode.\n * @param {Object} [result] The object onto which to store the result.\n * @returns {Object} The modified result parameter or a new instance if one was not provided.\n *\n * @example\n * const value = 1234567.1234567;\n * const splitValue = Cesium.EncodedCartesian3.encode(value);\n */\nEncodedCartesian3.encode = function (value, result) {\n  //>>includeStart('debug', pragmas.debug);\n  Check.typeOf.number(\"value\", value);\n  //>>includeEnd('debug');\n\n  if (!defined(result)) {\n    result = {\n      high: 0.0,\n      low: 0.0,\n    };\n  }\n\n  let doubleHigh;\n  if (value >= 0.0) {\n    doubleHigh = Math.floor(value / 65536.0) * 65536.0;\n    result.high = doubleHigh;\n    result.low = value - doubleHigh;\n  } else {\n    doubleHigh = Math.floor(-value / 65536.0) * 65536.0;\n    result.high = -doubleHigh;\n    result.low = value + doubleHigh;\n  }\n\n  return result;\n};\n\nconst scratchEncode = {\n  high: 0.0,\n  low: 0.0,\n};\n\n/**\n * Encodes a {@link Cartesian3} with 64-bit floating-point components as two {@link Cartesian3}\n * values that, when converted to 32-bit floating-point and added, approximate the original input.\n * <p>\n * The fixed-point encoding follows {@link https://help.agi.com/AGIComponents/html/BlogPrecisionsPrecisions.htm|Precisions, Precisions}.\n * </p>\n *\n * @param {Cartesian3} cartesian The cartesian to encode.\n * @param {EncodedCartesian3} [result] The object onto which to store the result.\n * @returns {EncodedCartesian3} The modified result parameter or a new EncodedCartesian3 instance if one was not provided.\n *\n * @example\n * const cart = new Cesium.Cartesian3(-10000000.0, 0.0, 10000000.0);\n * const encoded = Cesium.EncodedCartesian3.fromCartesian(cart);\n */\nEncodedCartesian3.fromCartesian = function (cartesian, result) {\n  //>>includeStart('debug', pragmas.debug);\n  Check.typeOf.object(\"cartesian\", cartesian);\n  //>>includeEnd('debug');\n\n  if (!defined(result)) {\n    result = new EncodedCartesian3();\n  }\n\n  const high = result.high;\n  const low = result.low;\n\n  EncodedCartesian3.encode(cartesian.x, scratchEncode);\n  high.x = scratchEncode.high;\n  low.x = scratchEncode.low;\n\n  EncodedCartesian3.encode(cartesian.y, scratchEncode);\n  high.y = scratchEncode.high;\n  low.y = scratchEncode.low;\n\n  EncodedCartesian3.encode(cartesian.z, scratchEncode);\n  high.z = scratchEncode.high;\n  low.z = scratchEncode.low;\n\n  return result;\n};\n\nconst encodedP = new EncodedCartesian3();\n\n/**\n * Encodes the provided <code>cartesian</code>, and writes it to an array with <code>high</code>\n * components followed by <code>low</code> components, i.e. <code>[high.x, high.y, high.z, low.x, low.y, low.z]</code>.\n * <p>\n * This is used to create interleaved high-precision position vertex attributes.\n * </p>\n *\n * @param {Cartesian3} cartesian The cartesian to encode.\n * @param {Number[]} cartesianArray The array to write to.\n * @param {Number} index The index into the array to start writing.  Six elements will be written.\n *\n * @exception {DeveloperError} index must be a number greater than or equal to 0.\n *\n * @example\n * const positions = [\n *    new Cesium.Cartesian3(),\n *    // ...\n * ];\n * const encodedPositions = new Float32Array(2 * 3 * positions.length);\n * let j = 0;\n * for (let i = 0; i < positions.length; ++i) {\n *   Cesium.EncodedCartesian3.writeElement(positions[i], encodedPositions, j);\n *   j += 6;\n * }\n */\nEncodedCartesian3.writeElements = function (cartesian, cartesianArray, index) {\n  //>>includeStart('debug', pragmas.debug);\n  Check.defined(\"cartesianArray\", cartesianArray);\n  Check.typeOf.number(\"index\", index);\n  Check.typeOf.number.greaterThanOrEquals(\"index\", index, 0);\n  //>>includeEnd('debug');\n\n  EncodedCartesian3.fromCartesian(cartesian, encodedP);\n  const high = encodedP.high;\n  const low = encodedP.low;\n\n  cartesianArray[index] = high.x;\n  cartesianArray[index + 1] = high.y;\n  cartesianArray[index + 2] = high.z;\n  cartesianArray[index + 3] = low.x;\n  cartesianArray[index + 4] = low.y;\n  cartesianArray[index + 5] = low.z;\n};\nexport default EncodedCartesian3;\n"],"names":["Cartesian3","Check","defined"],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;EAIA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA,SAAS,iBAAiB,GAAG;EAC7B;EACA;EACA;EACA;EACA;EACA;EACA,EAAE,IAAI,CAAC,IAAI,GAAGA,kBAAU,CAAC,KAAK,CAACA,kBAAU,CAAC,IAAI,CAAC,CAAC;AAChD;EACA;EACA;EACA;EACA;EACA;EACA;EACA,EAAE,IAAI,CAAC,GAAG,GAAGA,kBAAU,CAAC,KAAK,CAACA,kBAAU,CAAC,IAAI,CAAC,CAAC;EAC/C,CAAC;AACD;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA,iBAAiB,CAAC,MAAM,GAAG,UAAU,KAAK,EAAE,MAAM,EAAE;EACpD;EACA,EAAEC,kBAAK,CAAC,MAAM,CAAC,MAAM,CAAC,OAAO,EAAE,KAAK,CAAC,CAAC;EACtC;AACA;EACA,EAAE,IAAI,CAACC,YAAO,CAAC,MAAM,CAAC,EAAE;EACxB,IAAI,MAAM,GAAG;EACb,MAAM,IAAI,EAAE,GAAG;EACf,MAAM,GAAG,EAAE,GAAG;EACd,KAAK,CAAC;EACN,GAAG;AACH;EACA,EAAE,IAAI,UAAU,CAAC;EACjB,EAAE,IAAI,KAAK,IAAI,GAAG,EAAE;EACpB,IAAI,UAAU,GAAG,IAAI,CAAC,KAAK,CAAC,KAAK,GAAG,OAAO,CAAC,GAAG,OAAO,CAAC;EACvD,IAAI,MAAM,CAAC,IAAI,GAAG,UAAU,CAAC;EAC7B,IAAI,MAAM,CAAC,GAAG,GAAG,KAAK,GAAG,UAAU,CAAC;EACpC,GAAG,MAAM;EACT,IAAI,UAAU,GAAG,IAAI,CAAC,KAAK,CAAC,CAAC,KAAK,GAAG,OAAO,CAAC,GAAG,OAAO,CAAC;EACxD,IAAI,MAAM,CAAC,IAAI,GAAG,CAAC,UAAU,CAAC;EAC9B,IAAI,MAAM,CAAC,GAAG,GAAG,KAAK,GAAG,UAAU,CAAC;EACpC,GAAG;AACH;EACA,EAAE,OAAO,MAAM,CAAC;EAChB,CAAC,CAAC;AACF;EACA,MAAM,aAAa,GAAG;EACtB,EAAE,IAAI,EAAE,GAAG;EACX,EAAE,GAAG,EAAE,GAAG;EACV,CAAC,CAAC;AACF;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA,iBAAiB,CAAC,aAAa,GAAG,UAAU,SAAS,EAAE,MAAM,EAAE;EAC/D;EACA,EAAED,kBAAK,CAAC,MAAM,CAAC,MAAM,CAAC,WAAW,EAAE,SAAS,CAAC,CAAC;EAC9C;AACA;EACA,EAAE,IAAI,CAACC,YAAO,CAAC,MAAM,CAAC,EAAE;EACxB,IAAI,MAAM,GAAG,IAAI,iBAAiB,EAAE,CAAC;EACrC,GAAG;AACH;EACA,EAAE,MAAM,IAAI,GAAG,MAAM,CAAC,IAAI,CAAC;EAC3B,EAAE,MAAM,GAAG,GAAG,MAAM,CAAC,GAAG,CAAC;AACzB;EACA,EAAE,iBAAiB,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,EAAE,aAAa,CAAC,CAAC;EACvD,EAAE,IAAI,CAAC,CAAC,GAAG,aAAa,CAAC,IAAI,CAAC;EAC9B,EAAE,GAAG,CAAC,CAAC,GAAG,aAAa,CAAC,GAAG,CAAC;AAC5B;EACA,EAAE,iBAAiB,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,EAAE,aAAa,CAAC,CAAC;EACvD,EAAE,IAAI,CAAC,CAAC,GAAG,aAAa,CAAC,IAAI,CAAC;EAC9B,EAAE,GAAG,CAAC,CAAC,GAAG,aAAa,CAAC,GAAG,CAAC;AAC5B;EACA,EAAE,iBAAiB,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,EAAE,aAAa,CAAC,CAAC;EACvD,EAAE,IAAI,CAAC,CAAC,GAAG,aAAa,CAAC,IAAI,CAAC;EAC9B,EAAE,GAAG,CAAC,CAAC,GAAG,aAAa,CAAC,GAAG,CAAC;AAC5B;EACA,EAAE,OAAO,MAAM,CAAC;EAChB,CAAC,CAAC;AACF;EACA,MAAM,QAAQ,GAAG,IAAI,iBAAiB,EAAE,CAAC;AACzC;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA,iBAAiB,CAAC,aAAa,GAAG,UAAU,SAAS,EAAE,cAAc,EAAE,KAAK,EAAE;EAC9E;EACA,EAAED,kBAAK,CAAC,OAAO,CAAC,gBAAgB,EAAE,cAAc,CAAC,CAAC;EAClD,EAAEA,kBAAK,CAAC,MAAM,CAAC,MAAM,CAAC,OAAO,EAAE,KAAK,CAAC,CAAC;EACtC,EAAEA,kBAAK,CAAC,MAAM,CAAC,MAAM,CAAC,mBAAmB,CAAC,OAAO,EAAE,KAAK,EAAE,CAAC,CAAC,CAAC;EAC7D;AACA;EACA,EAAE,iBAAiB,CAAC,aAAa,CAAC,SAAS,EAAE,QAAQ,CAAC,CAAC;EACvD,EAAE,MAAM,IAAI,GAAG,QAAQ,CAAC,IAAI,CAAC;EAC7B,EAAE,MAAM,GAAG,GAAG,QAAQ,CAAC,GAAG,CAAC;AAC3B;EACA,EAAE,cAAc,CAAC,KAAK,CAAC,GAAG,IAAI,CAAC,CAAC,CAAC;EACjC,EAAE,cAAc,CAAC,KAAK,GAAG,CAAC,CAAC,GAAG,IAAI,CAAC,CAAC,CAAC;EACrC,EAAE,cAAc,CAAC,KAAK,GAAG,CAAC,CAAC,GAAG,IAAI,CAAC,CAAC,CAAC;EACrC,EAAE,cAAc,CAAC,KAAK,GAAG,CAAC,CAAC,GAAG,GAAG,CAAC,CAAC,CAAC;EACpC,EAAE,cAAc,CAAC,KAAK,GAAG,CAAC,CAAC,GAAG,GAAG,CAAC,CAAC,CAAC;EACpC,EAAE,cAAc,CAAC,KAAK,GAAG,CAAC,CAAC,GAAG,GAAG,CAAC,CAAC,CAAC;EACpC,CAAC;;;;;;;;"}