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import DeveloperError from "./DeveloperError.js";
/**
* Represents a scalar value's lower and upper bound at a near distance and far distance in eye space.
* @alias NearFarScalar
* @constructor
*
* @param {number} [near=0.0] The lower bound of the camera range.
* @param {number} [nearValue=0.0] The value at the lower bound of the camera range.
* @param {number} [far=1.0] The upper bound of the camera range.
* @param {number} [farValue=0.0] The value at the upper bound of the camera range.
*
* @see Packable
*/
function NearFarScalar(near, nearValue, far, farValue) {
/**
* The lower bound of the camera range.
* @type {number}
* @default 0.0
*/
this.near = near ?? 0.0;
/**
* The value at the lower bound of the camera range.
* @type {number}
* @default 0.0
*/
this.nearValue = nearValue ?? 0.0;
/**
* The upper bound of the camera range.
* @type {number}
* @default 1.0
*/
this.far = far ?? 1.0;
/**
* The value at the upper bound of the camera range.
* @type {number}
* @default 0.0
*/
this.farValue = farValue ?? 0.0;
}
/**
* Duplicates a NearFarScalar instance.
*
* @param {NearFarScalar} nearFarScalar The NearFarScalar to duplicate.
* @param {NearFarScalar} [result] The object onto which to store the result.
* @returns {NearFarScalar} The modified result parameter or a new NearFarScalar instance if one was not provided. (Returns undefined if nearFarScalar is undefined)
*/
NearFarScalar.clone = function (nearFarScalar, result) {
if (!defined(nearFarScalar)) {
return undefined;
}
if (!defined(result)) {
return new NearFarScalar(
nearFarScalar.near,
nearFarScalar.nearValue,
nearFarScalar.far,
nearFarScalar.farValue,
);
}
result.near = nearFarScalar.near;
result.nearValue = nearFarScalar.nearValue;
result.far = nearFarScalar.far;
result.farValue = nearFarScalar.farValue;
return result;
};
/**
* The number of elements used to pack the object into an array.
* @type {number}
*/
NearFarScalar.packedLength = 4;
/**
* Stores the provided instance into the provided array.
*
* @param {NearFarScalar} value The value to pack.
* @param {number[]} array The array to pack into.
* @param {number} [startingIndex=0] The index into the array at which to start packing the elements.
*
* @returns {number[]} The array that was packed into
*/
NearFarScalar.pack = function (value, array, startingIndex) {
//>>includeStart('debug', pragmas.debug);
if (!defined(value)) {
throw new DeveloperError("value is required");
}
if (!defined(array)) {
throw new DeveloperError("array is required");
}
//>>includeEnd('debug');
startingIndex = startingIndex ?? 0;
array[startingIndex++] = value.near;
array[startingIndex++] = value.nearValue;
array[startingIndex++] = value.far;
array[startingIndex] = value.farValue;
return array;
};
/**
* Retrieves an instance from a packed array.
*
* @param {number[]} array The packed array.
* @param {number} [startingIndex=0] The starting index of the element to be unpacked.
* @param {NearFarScalar} [result] The object into which to store the result.
* @returns {NearFarScalar} The modified result parameter or a new NearFarScalar instance if one was not provided.
*/
NearFarScalar.unpack = function (array, startingIndex, result) {
//>>includeStart('debug', pragmas.debug);
if (!defined(array)) {
throw new DeveloperError("array is required");
}
//>>includeEnd('debug');
startingIndex = startingIndex ?? 0;
Eif (!defined(result)) {
result = new NearFarScalar();
}
result.near = array[startingIndex++];
result.nearValue = array[startingIndex++];
result.far = array[startingIndex++];
result.farValue = array[startingIndex];
return result;
};
/**
* Compares the provided NearFarScalar and returns <code>true</code> if they are equal,
* <code>false</code> otherwise.
*
* @param {NearFarScalar} [left] The first NearFarScalar.
* @param {NearFarScalar} [right] The second NearFarScalar.
* @returns {boolean} <code>true</code> if left and right are equal; otherwise <code>false</code>.
*/
NearFarScalar.equals = function (left, right) {
return (
left === right ||
(defined(left) &&
defined(right) &&
left.near === right.near &&
left.nearValue === right.nearValue &&
left.far === right.far &&
left.farValue === right.farValue)
);
};
/**
* Duplicates this instance.
*
* @param {NearFarScalar} [result] The object onto which to store the result.
* @returns {NearFarScalar} The modified result parameter or a new NearFarScalar instance if one was not provided.
*/
NearFarScalar.prototype.clone = function (result) {
return NearFarScalar.clone(this, result);
};
/**
* Compares this instance to the provided NearFarScalar and returns <code>true</code> if they are equal,
* <code>false</code> otherwise.
*
* @param {NearFarScalar} [right] The right hand side NearFarScalar.
* @returns {boolean} <code>true</code> if left and right are equal; otherwise <code>false</code>.
*/
NearFarScalar.prototype.equals = function (right) {
return NearFarScalar.equals(this, right);
};
export default NearFarScalar;
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