text: /**
   * @license
   * Copyright The Closure Library Authors.
   * SPDX-License-Identifier: Apache-2.0
   */
  
  
  /**
   * @fileoverview Supplies 4 element vectors that are compatible with WebGL.
   * Each element is a float32 since that is typically the desired size of a
   * 4-vector in the GPU.  The API is structured to avoid unnecessary memory
   * allocations.  The last parameter will typically be the output vector and
   * an object can be both an input and output parameter to all methods except
   * where noted.
   */
  goog.provide('goog.vec.Vec4');
  
  /** @suppress {extraRequire} */
  goog.require('goog.vec');
  
  /** @typedef {!goog.vec.Float32} */ goog.vec.Vec4.Float32;
  /** @typedef {!goog.vec.Float64} */ goog.vec.Vec4.Float64;
  /** @typedef {!goog.vec.Number} */ goog.vec.Vec4.Number;
  /** @typedef {!goog.vec.AnyType} */ goog.vec.Vec4.AnyType;
  
  // The following two types are deprecated - use the above types instead.
  /** @typedef {!Float32Array} */ goog.vec.Vec4.Type;
  /** @typedef {!goog.vec.ArrayType} */ goog.vec.Vec4.Vec4Like;
  
  
  /**
   * Creates a 4 element vector of Float32. The array is initialized to zero.
   *
   * @return {!goog.vec.Vec4.Float32} The new 3 element array.
   */
  goog.vec.Vec4.createFloat32 = function() {
    'use strict';
    return new Float32Array(4);
  };
  
  
  /**
   * Creates a 4 element vector of Float64. The array is initialized to zero.
   *
   * @return {!goog.vec.Vec4.Float64} The new 4 element array.
   */
  goog.vec.Vec4.createFloat64 = function() {
    'use strict';
    return new Float64Array(4);
  };
  
  
  /**
   * Creates a 4 element vector of Number. The array is initialized to zero.
   *
   * @return {!goog.vec.Vec4.Number} The new 4 element array.
   */
  goog.vec.Vec4.createNumber = function() {
    'use strict';
    const v = new Array(4);
    goog.vec.Vec4.setFromValues(v, 0, 0, 0, 0);
    return v;
  };
  
  
  /**
   * Creates a 4 element vector of Float32Array. The array is initialized to zero.
   *
   * @deprecated Use createFloat32.
   * @return {!goog.vec.Vec4.Type} The new 4 element array.
   */
  goog.vec.Vec4.create = function() {
    'use strict';
    return new Float32Array(4);
  };
  
  
  /**
   * Creates a new 4 element vector initialized with the value from the given
   * array.
   *
   * @deprecated Use createFloat32FromArray.
   * @param {goog.vec.Vec4.Vec4Like} vec The source 4 element array.
   * @return {!goog.vec.Vec4.Type} The new 4 element array.
   */
  goog.vec.Vec4.createFromArray = function(vec) {
    'use strict';
    const newVec = goog.vec.Vec4.create();
    goog.vec.Vec4.setFromArray(newVec, vec);
    return newVec;
  };
  
  
  /**
   * Creates a new 4 element FLoat32 vector initialized with the value from the
   * given array.
   *
   * @param {goog.vec.Vec4.AnyType} vec The source 3 element array.
   * @return {!goog.vec.Vec4.Float32} The new 3 element array.
   */
  goog.vec.Vec4.createFloat32FromArray = function(vec) {
    'use strict';
    const newVec = goog.vec.Vec4.createFloat32();
    goog.vec.Vec4.setFromArray(newVec, vec);
    return newVec;
  };
  
  
  /**
   * Creates a new 4 element Float32 vector initialized with the supplied values.
   *
   * @param {number} v0 The value for element at index 0.
   * @param {number} v1 The value for element at index 1.
   * @param {number} v2 The value for element at index 2.
   * @param {number} v3 The value for element at index 3.
   * @return {!goog.vec.Vec4.Float32} The new vector.
   */
  goog.vec.Vec4.createFloat32FromValues = function(v0, v1, v2, v3) {
    'use strict';
    const vec = goog.vec.Vec4.createFloat32();
    goog.vec.Vec4.setFromValues(vec, v0, v1, v2, v3);
    return vec;
  };
  
  
  /**
   * Creates a clone of the given 4 element Float32 vector.
   *
   * @param {goog.vec.Vec4.Float32} vec The source 3 element vector.
   * @return {!goog.vec.Vec4.Float32} The new cloned vector.
   */
  goog.vec.Vec4.cloneFloat32 = goog.vec.Vec4.createFloat32FromArray;
  
  
  /**
   * Creates a new 4 element Float64 vector initialized with the value from the
   * given array.
   *
   * @param {goog.vec.Vec4.AnyType} vec The source 4 element array.
   * @return {!goog.vec.Vec4.Float64} The new 4 element array.
   */
  goog.vec.Vec4.createFloat64FromArray = function(vec) {
    'use strict';
    const newVec = goog.vec.Vec4.createFloat64();
    goog.vec.Vec4.setFromArray(newVec, vec);
    return newVec;
  };
  
  
  /**
  * Creates a new 4 element Float64 vector initialized with the supplied values.
  *
  * @param {number} v0 The value for element at index 0.
  * @param {number} v1 The value for element at index 1.
  * @param {number} v2 The value for element at index 2.
  * @param {number} v3 The value for element at index 3.
  * @return {!goog.vec.Vec4.Float64} The new vector.
  */
  goog.vec.Vec4.createFloat64FromValues = function(v0, v1, v2, v3) {
    'use strict';
    const vec = goog.vec.Vec4.createFloat64();
    goog.vec.Vec4.setFromValues(vec, v0, v1, v2, v3);
    return vec;
  };
  
  
  /**
   * Creates a clone of the given 4 element vector.
   *
   * @param {goog.vec.Vec4.Float64} vec The source 4 element vector.
   * @return {!goog.vec.Vec4.Float64} The new cloned vector.
   */
  goog.vec.Vec4.cloneFloat64 = goog.vec.Vec4.createFloat64FromArray;
  
  
  /**
   * Creates a new 4 element vector initialized with the supplied values.
   *
   * @deprecated Use createFloat32FromValues.
   * @param {number} v0 The value for element at index 0.
   * @param {number} v1 The value for element at index 1.
   * @param {number} v2 The value for element at index 2.
   * @param {number} v3 The value for element at index 3.
   * @return {!goog.vec.Vec4.Type} The new vector.
   */
  goog.vec.Vec4.createFromValues = function(v0, v1, v2, v3) {
    'use strict';
    const vec = goog.vec.Vec4.create();
    goog.vec.Vec4.setFromValues(vec, v0, v1, v2, v3);
    return vec;
  };
  
  
  /**
   * Creates a clone of the given 4 element vector.
   *
   * @deprecated Use cloneFloat32.
   * @param {goog.vec.Vec4.Vec4Like} vec The source 4 element vector.
   * @return {!goog.vec.Vec4.Type} The new cloned vector.
   */
  goog.vec.Vec4.clone = goog.vec.Vec4.createFromArray;
  
  
  /**
   * Initializes the vector with the given values.
   *
   * @param {goog.vec.Vec4.AnyType} vec The vector to receive the values.
   * @param {number} v0 The value for element at index 0.
   * @param {number} v1 The value for element at index 1.
   * @param {number} v2 The value for element at index 2.
   * @param {number} v3 The value for element at index 3.
   * @return {!goog.vec.Vec4.AnyType} Return vec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.setFromValues = function(vec, v0, v1, v2, v3) {
    'use strict';
    vec[0] = v0;
    vec[1] = v1;
    vec[2] = v2;
    vec[3] = v3;
    return vec;
  };
  
  
  /**
   * Initializes the vector with the given array of values.
   *
   * @param {goog.vec.Vec4.AnyType} vec The vector to receive the
   *     values.
   * @param {goog.vec.Vec4.AnyType} values The array of values.
   * @return {!goog.vec.Vec4.AnyType} Return vec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.setFromArray = function(vec, values) {
    'use strict';
    vec[0] = values[0];
    vec[1] = values[1];
    vec[2] = values[2];
    vec[3] = values[3];
    return vec;
  };
  
  
  /**
   * Performs a component-wise addition of vec0 and vec1 together storing the
   * result into resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The first addend.
   * @param {goog.vec.Vec4.AnyType} vec1 The second addend.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to
   *     receive the result. May be vec0 or vec1.
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.add = function(vec0, vec1, resultVec) {
    'use strict';
    resultVec[0] = vec0[0] + vec1[0];
    resultVec[1] = vec0[1] + vec1[1];
    resultVec[2] = vec0[2] + vec1[2];
    resultVec[3] = vec0[3] + vec1[3];
    return resultVec;
  };
  
  
  /**
   * Performs a component-wise subtraction of vec1 from vec0 storing the
   * result into resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The minuend.
   * @param {goog.vec.Vec4.AnyType} vec1 The subtrahend.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to
   *     receive the result. May be vec0 or vec1.
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.subtract = function(vec0, vec1, resultVec) {
    'use strict';
    resultVec[0] = vec0[0] - vec1[0];
    resultVec[1] = vec0[1] - vec1[1];
    resultVec[2] = vec0[2] - vec1[2];
    resultVec[3] = vec0[3] - vec1[3];
    return resultVec;
  };
  
  
  /**
   * Negates vec0, storing the result into resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The vector to negate.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to
   *     receive the result. May be vec0.
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.negate = function(vec0, resultVec) {
    'use strict';
    resultVec[0] = -vec0[0];
    resultVec[1] = -vec0[1];
    resultVec[2] = -vec0[2];
    resultVec[3] = -vec0[3];
    return resultVec;
  };
  
  
  /**
   * Takes the absolute value of each component of vec0 storing the result in
   * resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The source vector.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to receive the result.
   *     May be vec0.
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.abs = function(vec0, resultVec) {
    'use strict';
    resultVec[0] = Math.abs(vec0[0]);
    resultVec[1] = Math.abs(vec0[1]);
    resultVec[2] = Math.abs(vec0[2]);
    resultVec[3] = Math.abs(vec0[3]);
    return resultVec;
  };
  
  
  /**
   * Multiplies each component of vec0 with scalar storing the product into
   * resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The source vector.
   * @param {number} scalar The value to multiply with each component of vec0.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to
   *     receive the result. May be vec0.
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.scale = function(vec0, scalar, resultVec) {
    'use strict';
    resultVec[0] = vec0[0] * scalar;
    resultVec[1] = vec0[1] * scalar;
    resultVec[2] = vec0[2] * scalar;
    resultVec[3] = vec0[3] * scalar;
    return resultVec;
  };
  
  
  /**
   * Returns the magnitudeSquared of the given vector.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The vector.
   * @return {number} The magnitude of the vector.
   */
  goog.vec.Vec4.magnitudeSquared = function(vec0) {
    'use strict';
    const w = vec0[3];
    const x = vec0[0];
    const y = vec0[1];
    const z = vec0[2];
  
    return x * x + y * y + z * z + w * w;
  };
  
  
  /**
   * Returns the magnitude of the given vector.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The vector.
   * @return {number} The magnitude of the vector.
   */
  goog.vec.Vec4.magnitude = function(vec0) {
    'use strict';
    const w = vec0[3];
    const x = vec0[0];
    const y = vec0[1];
    const z = vec0[2];
  
    return Math.sqrt(x * x + y * y + z * z + w * w);
  };
  
  
  /**
   * Normalizes the given vector storing the result into resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The vector to normalize.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to
   *     receive the result. May be vec0.
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.normalize = function(vec0, resultVec) {
    'use strict';
    const ilen = 1 / goog.vec.Vec4.magnitude(vec0);
    resultVec[0] = vec0[0] * ilen;
    resultVec[1] = vec0[1] * ilen;
    resultVec[2] = vec0[2] * ilen;
    resultVec[3] = vec0[3] * ilen;
    return resultVec;
  };
  
  
  /**
   * Returns the scalar product of vectors v0 and v1.
   *
   * @param {goog.vec.Vec4.AnyType} v0 The first vector.
   * @param {goog.vec.Vec4.AnyType} v1 The second vector.
   * @return {number} The scalar product.
   */
  goog.vec.Vec4.dot = function(v0, v1) {
    'use strict';
    return v0[0] * v1[0] + v0[1] * v1[1] + v0[2] * v1[2] + v0[3] * v1[3];
  };
  
  
  /**
   * Linearly interpolate from v0 to v1 according to f. The value of f should be
   * in the range [0..1] otherwise the results are undefined.
   *
   * @param {goog.vec.Vec4.AnyType} v0 The first vector.
   * @param {goog.vec.Vec4.AnyType} v1 The second vector.
   * @param {number} f The interpolation factor.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to receive the
   *     results (may be v0 or v1).
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.lerp = function(v0, v1, f, resultVec) {
    'use strict';
    const w = v0[3];
    const x = v0[0];
    const y = v0[1];
    const z = v0[2];
  
    resultVec[0] = (v1[0] - x) * f + x;
    resultVec[1] = (v1[1] - y) * f + y;
    resultVec[2] = (v1[2] - z) * f + z;
    resultVec[3] = (v1[3] - w) * f + w;
    return resultVec;
  };
  
  
  /**
   * Compares the components of vec0 with the components of another vector or
   * scalar, storing the larger values in resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The source vector.
   * @param {goog.vec.Vec4.AnyType|number} limit The limit vector or scalar.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to receive the
   *     results (may be vec0 or limit).
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.max = function(vec0, limit, resultVec) {
    'use strict';
    if (typeof limit === 'number') {
      resultVec[0] = Math.max(vec0[0], limit);
      resultVec[1] = Math.max(vec0[1], limit);
      resultVec[2] = Math.max(vec0[2], limit);
      resultVec[3] = Math.max(vec0[3], limit);
    } else {
      resultVec[0] = Math.max(vec0[0], limit[0]);
      resultVec[1] = Math.max(vec0[1], limit[1]);
      resultVec[2] = Math.max(vec0[2], limit[2]);
      resultVec[3] = Math.max(vec0[3], limit[3]);
    }
    return resultVec;
  };
  
  
  /**
   * Compares the components of vec0 with the components of another vector or
   * scalar, storing the smaller values in resultVec.
   *
   * @param {goog.vec.Vec4.AnyType} vec0 The source vector.
   * @param {goog.vec.Vec4.AnyType|number} limit The limit vector or scalar.
   * @param {goog.vec.Vec4.AnyType} resultVec The vector to receive the
   *     results (may be vec0 or limit).
   * @return {!goog.vec.Vec4.AnyType} Return resultVec so that operations can be
   *     chained together.
   */
  goog.vec.Vec4.min = function(vec0, limit, resultVec) {
    'use strict';
    if (typeof limit === 'number') {
      resultVec[0] = Math.min(vec0[0], limit);
      resultVec[1] = Math.min(vec0[1], limit);
      resultVec[2] = Math.min(vec0[2], limit);
      resultVec[3] = Math.min(vec0[3], limit);
    } else {
      resultVec[0] = Math.min(vec0[0], limit[0]);
      resultVec[1] = Math.min(vec0[1], limit[1]);
      resultVec[2] = Math.min(vec0[2], limit[2]);
      resultVec[3] = Math.min(vec0[3], limit[3]);
    }
    return resultVec;
  };
  
  
  /**
   * Returns true if the components of v0 are equal to the components of v1.
   *
   * @param {goog.vec.Vec4.AnyType} v0 The first vector.
   * @param {goog.vec.Vec4.AnyType} v1 The second vector.
   * @return {boolean} True if the vectors are equal, false otherwise.
   */
  goog.vec.Vec4.equals = function(v0, v1) {
    'use strict';
    return v0.length == v1.length && v0[0] == v1[0] && v0[1] == v1[1] &&
        v0[2] == v1[2] && v0[3] == v1[3];
  };
  