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"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.identity = identity;
exports.setAxisAngle = setAxisAngle;
exports.getAxisAngle = getAxisAngle;
exports.getAngle = getAngle;
exports.multiply = multiply;
exports.rotateX = rotateX;
exports.rotateY = rotateY;
exports.rotateZ = rotateZ;
exports.calculateW = calculateW;
exports.exp = exp;
exports.ln = ln;
exports.pow = pow;
exports.slerp = slerp;
exports.random = random;
exports.invert = invert;
exports.conjugate = conjugate;
exports.fromMat3 = fromMat3;
exports.fromEuler = fromEuler;
exports.str = str;
exports.setAxes = exports.sqlerp = exports.rotationTo = exports.equals = exports.exactEquals = exports.normalize = exports.sqrLen = exports.squaredLength = exports.len = exports.length = exports.lerp = exports.dot = exports.scale = exports.mul = exports.add = exports.set = exports.copy = exports.fromValues = exports.clone = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

var mat3 = _interopRequireWildcard(require("./mat3.js"));

var vec3 = _interopRequireWildcard(require("./vec3.js"));

var vec4 = _interopRequireWildcard(require("./vec4.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * Quaternion
 * @module quat
 */

/**
 * Creates a new identity quat
 *
 * @returns {quat} a new quaternion
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(4);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
  }

  out[3] = 1;
  return out;
}
/**
 * Set a quat to the identity quaternion
 *
 * @param {quat} out the receiving quaternion
 * @returns {quat} out
 */


function identity(out) {
  out[0] = 0;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  return out;
}
/**
 * Sets a quat from the given angle and rotation axis,
 * then returns it.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyVec3} axis the axis around which to rotate
 * @param {Number} rad the angle in radians
 * @returns {quat} out
 **/


function setAxisAngle(out, axis, rad) {
  rad = rad * 0.5;
  var s = Math.sin(rad);
  out[0] = s * axis[0];
  out[1] = s * axis[1];
  out[2] = s * axis[2];
  out[3] = Math.cos(rad);
  return out;
}
/**
 * Gets the rotation axis and angle for a given
 *  quaternion. If a quaternion is created with
 *  setAxisAngle, this method will return the same
 *  values as providied in the original parameter list
 *  OR functionally equivalent values.
 * Example: The quaternion formed by axis [0, 0, 1] and
 *  angle -90 is the same as the quaternion formed by
 *  [0, 0, 1] and 270. This method favors the latter.
 * @param  {vec3} out_axis  Vector receiving the axis of rotation
 * @param  {ReadonlyQuat} q     Quaternion to be decomposed
 * @return {Number}     Angle, in radians, of the rotation
 */


function getAxisAngle(out_axis, q) {
  var rad = Math.acos(q[3]) * 2.0;
  var s = Math.sin(rad / 2.0);

  if (s > glMatrix.EPSILON) {
    out_axis[0] = q[0] / s;
    out_axis[1] = q[1] / s;
    out_axis[2] = q[2] / s;
  } else {
    // If s is zero, return any axis (no rotation - axis does not matter)
    out_axis[0] = 1;
    out_axis[1] = 0;
    out_axis[2] = 0;
  }

  return rad;
}
/**
 * Gets the angular distance between two unit quaternions
 *
 * @param  {ReadonlyQuat} a     Origin unit quaternion
 * @param  {ReadonlyQuat} b     Destination unit quaternion
 * @return {Number}     Angle, in radians, between the two quaternions
 */


function getAngle(a, b) {
  var dotproduct = dot(a, b);
  return Math.acos(2 * dotproduct * dotproduct - 1);
}
/**
 * Multiplies two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {quat} out
 */


function multiply(out, a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = b[0],
      by = b[1],
      bz = b[2],
      bw = b[3];
  out[0] = ax * bw + aw * bx + ay * bz - az * by;
  out[1] = ay * bw + aw * by + az * bx - ax * bz;
  out[2] = az * bw + aw * bz + ax * by - ay * bx;
  out[3] = aw * bw - ax * bx - ay * by - az * bz;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the X axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */


function rotateX(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw + aw * bx;
  out[1] = ay * bw + az * bx;
  out[2] = az * bw - ay * bx;
  out[3] = aw * bw - ax * bx;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the Y axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */


function rotateY(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var by = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw - az * by;
  out[1] = ay * bw + aw * by;
  out[2] = az * bw + ax * by;
  out[3] = aw * bw - ay * by;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the Z axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */


function rotateZ(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bz = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw + ay * bz;
  out[1] = ay * bw - ax * bz;
  out[2] = az * bw + aw * bz;
  out[3] = aw * bw - az * bz;
  return out;
}
/**
 * Calculates the W component of a quat from the X, Y, and Z components.
 * Assumes that quaternion is 1 unit in length.
 * Any existing W component will be ignored.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate W component of
 * @returns {quat} out
 */


function calculateW(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2];
  out[0] = x;
  out[1] = y;
  out[2] = z;
  out[3] = Math.sqrt(Math.abs(1.0 - x * x - y * y - z * z));
  return out;
}
/**
 * Calculate the exponential of a unit quaternion.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate the exponential of
 * @returns {quat} out
 */


function exp(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2],
      w = a[3];
  var r = Math.sqrt(x * x + y * y + z * z);
  var et = Math.exp(w);
  var s = r > 0 ? et * Math.sin(r) / r : 0;
  out[0] = x * s;
  out[1] = y * s;
  out[2] = z * s;
  out[3] = et * Math.cos(r);
  return out;
}
/**
 * Calculate the natural logarithm of a unit quaternion.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate the exponential of
 * @returns {quat} out
 */


function ln(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2],
      w = a[3];
  var r = Math.sqrt(x * x + y * y + z * z);
  var t = r > 0 ? Math.atan2(r, w) / r : 0;
  out[0] = x * t;
  out[1] = y * t;
  out[2] = z * t;
  out[3] = 0.5 * Math.log(x * x + y * y + z * z + w * w);
  return out;
}
/**
 * Calculate the scalar power of a unit quaternion.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate the exponential of
 * @param {Number} b amount to scale the quaternion by
 * @returns {quat} out
 */


function pow(out, a, b) {
  ln(out, a);
  scale(out, out, b);
  exp(out, out);
  return out;
}
/**
 * Performs a spherical linear interpolation between two quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 */


function slerp(out, a, b, t) {
  // benchmarks:
  //    http://jsperf.com/quaternion-slerp-implementations
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = b[0],
      by = b[1],
      bz = b[2],
      bw = b[3];
  var omega, cosom, sinom, scale0, scale1; // calc cosine

  cosom = ax * bx + ay * by + az * bz + aw * bw; // adjust signs (if necessary)

  if (cosom < 0.0) {
    cosom = -cosom;
    bx = -bx;
    by = -by;
    bz = -bz;
    bw = -bw;
  } // calculate coefficients


  if (1.0 - cosom > glMatrix.EPSILON) {
    // standard case (slerp)
    omega = Math.acos(cosom);
    sinom = Math.sin(omega);
    scale0 = Math.sin((1.0 - t) * omega) / sinom;
    scale1 = Math.sin(t * omega) / sinom;
  } else {
    // "from" and "to" quaternions are very close
    //  ... so we can do a linear interpolation
    scale0 = 1.0 - t;
    scale1 = t;
  } // calculate final values


  out[0] = scale0 * ax + scale1 * bx;
  out[1] = scale0 * ay + scale1 * by;
  out[2] = scale0 * az + scale1 * bz;
  out[3] = scale0 * aw + scale1 * bw;
  return out;
}
/**
 * Generates a random unit quaternion
 *
 * @param {quat} out the receiving quaternion
 * @returns {quat} out
 */


function random(out) {
  // Implementation of http://planning.cs.uiuc.edu/node198.html
  // TODO: Calling random 3 times is probably not the fastest solution
  var u1 = glMatrix.RANDOM();
  var u2 = glMatrix.RANDOM();
  var u3 = glMatrix.RANDOM();
  var sqrt1MinusU1 = Math.sqrt(1 - u1);
  var sqrtU1 = Math.sqrt(u1);
  out[0] = sqrt1MinusU1 * Math.sin(2.0 * Math.PI * u2);
  out[1] = sqrt1MinusU1 * Math.cos(2.0 * Math.PI * u2);
  out[2] = sqrtU1 * Math.sin(2.0 * Math.PI * u3);
  out[3] = sqrtU1 * Math.cos(2.0 * Math.PI * u3);
  return out;
}
/**
 * Calculates the inverse of a quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate inverse of
 * @returns {quat} out
 */


function invert(out, a) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var dot = a0 * a0 + a1 * a1 + a2 * a2 + a3 * a3;
  var invDot = dot ? 1.0 / dot : 0; // TODO: Would be faster to return [0,0,0,0] immediately if dot == 0

  out[0] = -a0 * invDot;
  out[1] = -a1 * invDot;
  out[2] = -a2 * invDot;
  out[3] = a3 * invDot;
  return out;
}
/**
 * Calculates the conjugate of a quat
 * If the quaternion is normalized, this function is faster than quat.inverse and produces the same result.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate conjugate of
 * @returns {quat} out
 */


function conjugate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = a[3];
  return out;
}
/**
 * Creates a quaternion from the given 3x3 rotation matrix.
 *
 * NOTE: The resultant quaternion is not normalized, so you should be sure
 * to renormalize the quaternion yourself where necessary.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyMat3} m rotation matrix
 * @returns {quat} out
 * @function
 */


function fromMat3(out, m) {
  // Algorithm in Ken Shoemake's article in 1987 SIGGRAPH course notes
  // article "Quaternion Calculus and Fast Animation".
  var fTrace = m[0] + m[4] + m[8];
  var fRoot;

  if (fTrace > 0.0) {
    // |w| > 1/2, may as well choose w > 1/2
    fRoot = Math.sqrt(fTrace + 1.0); // 2w

    out[3] = 0.5 * fRoot;
    fRoot = 0.5 / fRoot; // 1/(4w)

    out[0] = (m[5] - m[7]) * fRoot;
    out[1] = (m[6] - m[2]) * fRoot;
    out[2] = (m[1] - m[3]) * fRoot;
  } else {
    // |w| <= 1/2
    var i = 0;
    if (m[4] > m[0]) i = 1;
    if (m[8] > m[i * 3 + i]) i = 2;
    var j = (i + 1) % 3;
    var k = (i + 2) % 3;
    fRoot = Math.sqrt(m[i * 3 + i] - m[j * 3 + j] - m[k * 3 + k] + 1.0);
    out[i] = 0.5 * fRoot;
    fRoot = 0.5 / fRoot;
    out[3] = (m[j * 3 + k] - m[k * 3 + j]) * fRoot;
    out[j] = (m[j * 3 + i] + m[i * 3 + j]) * fRoot;
    out[k] = (m[k * 3 + i] + m[i * 3 + k]) * fRoot;
  }

  return out;
}
/**
 * Creates a quaternion from the given euler angle x, y, z.
 *
 * @param {quat} out the receiving quaternion
 * @param {x} Angle to rotate around X axis in degrees.
 * @param {y} Angle to rotate around Y axis in degrees.
 * @param {z} Angle to rotate around Z axis in degrees.
 * @returns {quat} out
 * @function
 */


function fromEuler(out, x, y, z) {
  var halfToRad = 0.5 * Math.PI / 180.0;
  x *= halfToRad;
  y *= halfToRad;
  z *= halfToRad;
  var sx = Math.sin(x);
  var cx = Math.cos(x);
  var sy = Math.sin(y);
  var cy = Math.cos(y);
  var sz = Math.sin(z);
  var cz = Math.cos(z);
  out[0] = sx * cy * cz - cx * sy * sz;
  out[1] = cx * sy * cz + sx * cy * sz;
  out[2] = cx * cy * sz - sx * sy * cz;
  out[3] = cx * cy * cz + sx * sy * sz;
  return out;
}
/**
 * Returns a string representation of a quatenion
 *
 * @param {ReadonlyQuat} a vector to represent as a string
 * @returns {String} string representation of the vector
 */


function str(a) {
  return "quat(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ")";
}
/**
 * Creates a new quat initialized with values from an existing quaternion
 *
 * @param {ReadonlyQuat} a quaternion to clone
 * @returns {quat} a new quaternion
 * @function
 */


var clone = vec4.clone;
/**
 * Creates a new quat initialized with the given values
 *
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @param {Number} w W component
 * @returns {quat} a new quaternion
 * @function
 */

exports.clone = clone;
var fromValues = vec4.fromValues;
/**
 * Copy the values from one quat to another
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the source quaternion
 * @returns {quat} out
 * @function
 */

exports.fromValues = fromValues;
var copy = vec4.copy;
/**
 * Set the components of a quat to the given values
 *
 * @param {quat} out the receiving quaternion
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @param {Number} w W component
 * @returns {quat} out
 * @function
 */

exports.copy = copy;
var set = vec4.set;
/**
 * Adds two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {quat} out
 * @function
 */

exports.set = set;
var add = vec4.add;
/**
 * Alias for {@link quat.multiply}
 * @function
 */

exports.add = add;
var mul = multiply;
/**
 * Scales a quat by a scalar number
 *
 * @param {quat} out the receiving vector
 * @param {ReadonlyQuat} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {quat} out
 * @function
 */

exports.mul = mul;
var scale = vec4.scale;
/**
 * Calculates the dot product of two quat's
 *
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {Number} dot product of a and b
 * @function
 */

exports.scale = scale;
var dot = vec4.dot;
/**
 * Performs a linear interpolation between two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 * @function
 */

exports.dot = dot;
var lerp = vec4.lerp;
/**
 * Calculates the length of a quat
 *
 * @param {ReadonlyQuat} a vector to calculate length of
 * @returns {Number} length of a
 */

exports.lerp = lerp;
var length = vec4.length;
/**
 * Alias for {@link quat.length}
 * @function
 */

exports.length = length;
var len = length;
/**
 * Calculates the squared length of a quat
 *
 * @param {ReadonlyQuat} a vector to calculate squared length of
 * @returns {Number} squared length of a
 * @function
 */

exports.len = len;
var squaredLength = vec4.squaredLength;
/**
 * Alias for {@link quat.squaredLength}
 * @function
 */

exports.squaredLength = squaredLength;
var sqrLen = squaredLength;
/**
 * Normalize a quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quaternion to normalize
 * @returns {quat} out
 * @function
 */

exports.sqrLen = sqrLen;
var normalize = vec4.normalize;
/**
 * Returns whether or not the quaternions have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyQuat} a The first quaternion.
 * @param {ReadonlyQuat} b The second quaternion.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */

exports.normalize = normalize;
var exactEquals = vec4.exactEquals;
/**
 * Returns whether or not the quaternions have approximately the same elements in the same position.
 *
 * @param {ReadonlyQuat} a The first vector.
 * @param {ReadonlyQuat} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */

exports.exactEquals = exactEquals;
var equals = vec4.equals;
/**
 * Sets a quaternion to represent the shortest rotation from one
 * vector to another.
 *
 * Both vectors are assumed to be unit length.
 *
 * @param {quat} out the receiving quaternion.
 * @param {ReadonlyVec3} a the initial vector
 * @param {ReadonlyVec3} b the destination vector
 * @returns {quat} out
 */

exports.equals = equals;

var rotationTo = function () {
  var tmpvec3 = vec3.create();
  var xUnitVec3 = vec3.fromValues(1, 0, 0);
  var yUnitVec3 = vec3.fromValues(0, 1, 0);
  return function (out, a, b) {
    var dot = vec3.dot(a, b);

    if (dot < -0.999999) {
      vec3.cross(tmpvec3, xUnitVec3, a);
      if (vec3.len(tmpvec3) < 0.000001) vec3.cross(tmpvec3, yUnitVec3, a);
      vec3.normalize(tmpvec3, tmpvec3);
      setAxisAngle(out, tmpvec3, Math.PI);
      return out;
    } else if (dot > 0.999999) {
      out[0] = 0;
      out[1] = 0;
      out[2] = 0;
      out[3] = 1;
      return out;
    } else {
      vec3.cross(tmpvec3, a, b);
      out[0] = tmpvec3[0];
      out[1] = tmpvec3[1];
      out[2] = tmpvec3[2];
      out[3] = 1 + dot;
      return normalize(out, out);
    }
  };
}();
/**
 * Performs a spherical linear interpolation with two control points
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {ReadonlyQuat} c the third operand
 * @param {ReadonlyQuat} d the fourth operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 */


exports.rotationTo = rotationTo;

var sqlerp = function () {
  var temp1 = create();
  var temp2 = create();
  return function (out, a, b, c, d, t) {
    slerp(temp1, a, d, t);
    slerp(temp2, b, c, t);
    slerp(out, temp1, temp2, 2 * t * (1 - t));
    return out;
  };
}();
/**
 * Sets the specified quaternion with values corresponding to the given
 * axes. Each axis is a vec3 and is expected to be unit length and
 * perpendicular to all other specified axes.
 *
 * @param {ReadonlyVec3} view  the vector representing the viewing direction
 * @param {ReadonlyVec3} right the vector representing the local "right" direction
 * @param {ReadonlyVec3} up    the vector representing the local "up" direction
 * @returns {quat} out
 */


exports.sqlerp = sqlerp;

var setAxes = function () {
  var matr = mat3.create();
  return function (out, view, right, up) {
    matr[0] = right[0];
    matr[3] = right[1];
    matr[6] = right[2];
    matr[1] = up[0];
    matr[4] = up[1];
    matr[7] = up[2];
    matr[2] = -view[0];
    matr[5] = -view[1];
    matr[8] = -view[2];
    return normalize(out, fromMat3(out, matr));
  };
}();

exports.setAxes = setAxes;
Youez - 2016 - github.com/yon3zu
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