(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@antv/g-lite')) :
  typeof define === 'function' && define.amd ? define(['exports', '@antv/g-lite'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory((global.G = global.G || {}, global.G.CameraAPI = {}), global.window.G));
}(this, (function (exports, gLite) { 'use strict';

  function _inheritsLoose(subClass, superClass) {
    subClass.prototype = Object.create(superClass.prototype);
    subClass.prototype.constructor = subClass;
    _setPrototypeOf(subClass, superClass);
  }
  function _setPrototypeOf(o, p) {
    _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) {
      o.__proto__ = p;
      return o;
    };
    return _setPrototypeOf(o, p);
  }

  /**
   * Common utilities
   * @module glMatrix
   */
  // Configuration Constants
  var EPSILON = 0.000001;
  var ARRAY_TYPE = typeof Float32Array !== 'undefined' ? Float32Array : Array;
  if (!Math.hypot) Math.hypot = function () {
    var y = 0,
        i = arguments.length;

    while (i--) {
      y += arguments[i] * arguments[i];
    }

    return Math.sqrt(y);
  };

  /**
   * 3x3 Matrix
   * @module mat3
   */

  /**
   * Creates a new identity mat3
   *
   * @returns {mat3} a new 3x3 matrix
   */

  function create() {
    var out = new ARRAY_TYPE(9);

    if (ARRAY_TYPE != Float32Array) {
      out[1] = 0;
      out[2] = 0;
      out[3] = 0;
      out[5] = 0;
      out[6] = 0;
      out[7] = 0;
    }

    out[0] = 1;
    out[4] = 1;
    out[8] = 1;
    return out;
  }

  /**
   * 4x4 Matrix<br>Format: column-major, when typed out it looks like row-major<br>The matrices are being post multiplied.
   * @module mat4
   */

  /**
   * Creates a new identity mat4
   *
   * @returns {mat4} a new 4x4 matrix
   */

  function create$1() {
    var out = new ARRAY_TYPE(16);

    if (ARRAY_TYPE != Float32Array) {
      out[1] = 0;
      out[2] = 0;
      out[3] = 0;
      out[4] = 0;
      out[6] = 0;
      out[7] = 0;
      out[8] = 0;
      out[9] = 0;
      out[11] = 0;
      out[12] = 0;
      out[13] = 0;
      out[14] = 0;
    }

    out[0] = 1;
    out[5] = 1;
    out[10] = 1;
    out[15] = 1;
    return out;
  }
  /**
   * Creates a new mat4 initialized with values from an existing matrix
   *
   * @param {ReadonlyMat4} a matrix to clone
   * @returns {mat4} a new 4x4 matrix
   */

  function clone(a) {
    var out = new ARRAY_TYPE(16);
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    out[3] = a[3];
    out[4] = a[4];
    out[5] = a[5];
    out[6] = a[6];
    out[7] = a[7];
    out[8] = a[8];
    out[9] = a[9];
    out[10] = a[10];
    out[11] = a[11];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
    return out;
  }
  /**
   * Copy the values from one mat4 to another
   *
   * @param {mat4} out the receiving matrix
   * @param {ReadonlyMat4} a the source matrix
   * @returns {mat4} out
   */

  function copy(out, a) {
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    out[3] = a[3];
    out[4] = a[4];
    out[5] = a[5];
    out[6] = a[6];
    out[7] = a[7];
    out[8] = a[8];
    out[9] = a[9];
    out[10] = a[10];
    out[11] = a[11];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
    return out;
  }
  /**
   * Multiplies two mat4s
   *
   * @param {mat4} out the receiving matrix
   * @param {ReadonlyMat4} a the first operand
   * @param {ReadonlyMat4} b the second operand
   * @returns {mat4} out
   */

  function multiply(out, a, b) {
    var a00 = a[0],
        a01 = a[1],
        a02 = a[2],
        a03 = a[3];
    var a10 = a[4],
        a11 = a[5],
        a12 = a[6],
        a13 = a[7];
    var a20 = a[8],
        a21 = a[9],
        a22 = a[10],
        a23 = a[11];
    var a30 = a[12],
        a31 = a[13],
        a32 = a[14],
        a33 = a[15]; // Cache only the current line of the second matrix

    var b0 = b[0],
        b1 = b[1],
        b2 = b[2],
        b3 = b[3];
    out[0] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
    out[1] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
    out[2] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
    out[3] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
    b0 = b[4];
    b1 = b[5];
    b2 = b[6];
    b3 = b[7];
    out[4] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
    out[5] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
    out[6] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
    out[7] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
    b0 = b[8];
    b1 = b[9];
    b2 = b[10];
    b3 = b[11];
    out[8] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
    out[9] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
    out[10] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
    out[11] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
    b0 = b[12];
    b1 = b[13];
    b2 = b[14];
    b3 = b[15];
    out[12] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
    out[13] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
    out[14] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
    out[15] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
    return out;
  }
  /**
   * Translate a mat4 by the given vector
   *
   * @param {mat4} out the receiving matrix
   * @param {ReadonlyMat4} a the matrix to translate
   * @param {ReadonlyVec3} v vector to translate by
   * @returns {mat4} out
   */

  function translate(out, a, v) {
    var x = v[0],
        y = v[1],
        z = v[2];
    var a00, a01, a02, a03;
    var a10, a11, a12, a13;
    var a20, a21, a22, a23;

    if (a === out) {
      out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];
      out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];
      out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];
      out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];
    } else {
      a00 = a[0];
      a01 = a[1];
      a02 = a[2];
      a03 = a[3];
      a10 = a[4];
      a11 = a[5];
      a12 = a[6];
      a13 = a[7];
      a20 = a[8];
      a21 = a[9];
      a22 = a[10];
      a23 = a[11];
      out[0] = a00;
      out[1] = a01;
      out[2] = a02;
      out[3] = a03;
      out[4] = a10;
      out[5] = a11;
      out[6] = a12;
      out[7] = a13;
      out[8] = a20;
      out[9] = a21;
      out[10] = a22;
      out[11] = a23;
      out[12] = a00 * x + a10 * y + a20 * z + a[12];
      out[13] = a01 * x + a11 * y + a21 * z + a[13];
      out[14] = a02 * x + a12 * y + a22 * z + a[14];
      out[15] = a03 * x + a13 * y + a23 * z + a[15];
    }

    return out;
  }
  /**
   * Calculates a 4x4 matrix from the given quaternion
   *
   * @param {mat4} out mat4 receiving operation result
   * @param {ReadonlyQuat} q Quaternion to create matrix from
   *
   * @returns {mat4} out
   */

  function fromQuat(out, q) {
    var x = q[0],
        y = q[1],
        z = q[2],
        w = q[3];
    var x2 = x + x;
    var y2 = y + y;
    var z2 = z + z;
    var xx = x * x2;
    var yx = y * x2;
    var yy = y * y2;
    var zx = z * x2;
    var zy = z * y2;
    var zz = z * z2;
    var wx = w * x2;
    var wy = w * y2;
    var wz = w * z2;
    out[0] = 1 - yy - zz;
    out[1] = yx + wz;
    out[2] = zx - wy;
    out[3] = 0;
    out[4] = yx - wz;
    out[5] = 1 - xx - zz;
    out[6] = zy + wx;
    out[7] = 0;
    out[8] = zx + wy;
    out[9] = zy - wx;
    out[10] = 1 - xx - yy;
    out[11] = 0;
    out[12] = 0;
    out[13] = 0;
    out[14] = 0;
    out[15] = 1;
    return out;
  }

  /**
   * 3 Dimensional Vector
   * @module vec3
   */

  /**
   * Creates a new, empty vec3
   *
   * @returns {vec3} a new 3D vector
   */

  function create$2() {
    var out = new ARRAY_TYPE(3);

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

    return out;
  }
  /**
   * Creates a new vec3 initialized with values from an existing vector
   *
   * @param {ReadonlyVec3} a vector to clone
   * @returns {vec3} a new 3D vector
   */

  function clone$1(a) {
    var out = new ARRAY_TYPE(3);
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    return out;
  }
  /**
   * Calculates the length of a vec3
   *
   * @param {ReadonlyVec3} a vector to calculate length of
   * @returns {Number} length of a
   */

  function length(a) {
    var x = a[0];
    var y = a[1];
    var z = a[2];
    return Math.hypot(x, y, z);
  }
  /**
   * Creates a new vec3 initialized with the given values
   *
   * @param {Number} x X component
   * @param {Number} y Y component
   * @param {Number} z Z component
   * @returns {vec3} a new 3D vector
   */

  function fromValues(x, y, z) {
    var out = new ARRAY_TYPE(3);
    out[0] = x;
    out[1] = y;
    out[2] = z;
    return out;
  }
  /**
   * Copy the values from one vec3 to another
   *
   * @param {vec3} out the receiving vector
   * @param {ReadonlyVec3} a the source vector
   * @returns {vec3} out
   */

  function copy$1(out, a) {
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    return out;
  }
  /**
   * Adds two vec3's
   *
   * @param {vec3} out the receiving vector
   * @param {ReadonlyVec3} a the first operand
   * @param {ReadonlyVec3} b the second operand
   * @returns {vec3} out
   */

  function add(out, a, b) {
    out[0] = a[0] + b[0];
    out[1] = a[1] + b[1];
    out[2] = a[2] + b[2];
    return out;
  }
  /**
   * Scales a vec3 by a scalar number
   *
   * @param {vec3} out the receiving vector
   * @param {ReadonlyVec3} a the vector to scale
   * @param {Number} b amount to scale the vector by
   * @returns {vec3} out
   */

  function scale(out, a, b) {
    out[0] = a[0] * b;
    out[1] = a[1] * b;
    out[2] = a[2] * b;
    return out;
  }
  /**
   * Calculates the euclidian distance between two vec3's
   *
   * @param {ReadonlyVec3} a the first operand
   * @param {ReadonlyVec3} b the second operand
   * @returns {Number} distance between a and b
   */

  function distance(a, b) {
    var x = b[0] - a[0];
    var y = b[1] - a[1];
    var z = b[2] - a[2];
    return Math.hypot(x, y, z);
  }
  /**
   * Normalize a vec3
   *
   * @param {vec3} out the receiving vector
   * @param {ReadonlyVec3} a vector to normalize
   * @returns {vec3} out
   */

  function normalize(out, a) {
    var x = a[0];
    var y = a[1];
    var z = a[2];
    var len = x * x + y * y + z * z;

    if (len > 0) {
      //TODO: evaluate use of glm_invsqrt here?
      len = 1 / Math.sqrt(len);
    }

    out[0] = a[0] * len;
    out[1] = a[1] * len;
    out[2] = a[2] * len;
    return out;
  }
  /**
   * Calculates the dot product of two vec3's
   *
   * @param {ReadonlyVec3} a the first operand
   * @param {ReadonlyVec3} b the second operand
   * @returns {Number} dot product of a and b
   */

  function dot(a, b) {
    return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
  }
  /**
   * Computes the cross product of two vec3's
   *
   * @param {vec3} out the receiving vector
   * @param {ReadonlyVec3} a the first operand
   * @param {ReadonlyVec3} b the second operand
   * @returns {vec3} out
   */

  function cross(out, a, b) {
    var ax = a[0],
        ay = a[1],
        az = a[2];
    var bx = b[0],
        by = b[1],
        bz = b[2];
    out[0] = ay * bz - az * by;
    out[1] = az * bx - ax * bz;
    out[2] = ax * by - ay * bx;
    return out;
  }
  /**
   * Performs a linear interpolation between two vec3's
   *
   * @param {vec3} out the receiving vector
   * @param {ReadonlyVec3} a the first operand
   * @param {ReadonlyVec3} b the second operand
   * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
   * @returns {vec3} out
   */

  function lerp(out, a, b, t) {
    var ax = a[0];
    var ay = a[1];
    var az = a[2];
    out[0] = ax + t * (b[0] - ax);
    out[1] = ay + t * (b[1] - ay);
    out[2] = az + t * (b[2] - az);
    return out;
  }
  /**
   * Alias for {@link vec3.distance}
   * @function
   */

  var dist = distance;
  /**
   * Alias for {@link vec3.length}
   * @function
   */

  var len = length;
  /**
   * Perform some operation over an array of vec3s.
   *
   * @param {Array} a the array of vectors to iterate over
   * @param {Number} stride Number of elements between the start of each vec3. If 0 assumes tightly packed
   * @param {Number} offset Number of elements to skip at the beginning of the array
   * @param {Number} count Number of vec3s to iterate over. If 0 iterates over entire array
   * @param {Function} fn Function to call for each vector in the array
   * @param {Object} [arg] additional argument to pass to fn
   * @returns {Array} a
   * @function
   */

  var forEach = function () {
    var vec = create$2();
    return function (a, stride, offset, count, fn, arg) {
      var i, l;

      if (!stride) {
        stride = 3;
      }

      if (!offset) {
        offset = 0;
      }

      if (count) {
        l = Math.min(count * stride + offset, a.length);
      } else {
        l = a.length;
      }

      for (i = offset; i < l; i += stride) {
        vec[0] = a[i];
        vec[1] = a[i + 1];
        vec[2] = a[i + 2];
        fn(vec, vec, arg);
        a[i] = vec[0];
        a[i + 1] = vec[1];
        a[i + 2] = vec[2];
      }

      return a;
    };
  }();

  /**
   * 4 Dimensional Vector
   * @module vec4
   */

  /**
   * Creates a new, empty vec4
   *
   * @returns {vec4} a new 4D vector
   */

  function create$3() {
    var out = new ARRAY_TYPE(4);

    if (ARRAY_TYPE != Float32Array) {
      out[0] = 0;
      out[1] = 0;
      out[2] = 0;
      out[3] = 0;
    }

    return out;
  }
  /**
   * Normalize a vec4
   *
   * @param {vec4} out the receiving vector
   * @param {ReadonlyVec4} a vector to normalize
   * @returns {vec4} out
   */

  function normalize$1(out, a) {
    var x = a[0];
    var y = a[1];
    var z = a[2];
    var w = a[3];
    var len = x * x + y * y + z * z + w * w;

    if (len > 0) {
      len = 1 / Math.sqrt(len);
    }

    out[0] = x * len;
    out[1] = y * len;
    out[2] = z * len;
    out[3] = w * len;
    return out;
  }
  /**
   * Perform some operation over an array of vec4s.
   *
   * @param {Array} a the array of vectors to iterate over
   * @param {Number} stride Number of elements between the start of each vec4. If 0 assumes tightly packed
   * @param {Number} offset Number of elements to skip at the beginning of the array
   * @param {Number} count Number of vec4s to iterate over. If 0 iterates over entire array
   * @param {Function} fn Function to call for each vector in the array
   * @param {Object} [arg] additional argument to pass to fn
   * @returns {Array} a
   * @function
   */

  var forEach$1 = function () {
    var vec = create$3();
    return function (a, stride, offset, count, fn, arg) {
      var i, l;

      if (!stride) {
        stride = 4;
      }

      if (!offset) {
        offset = 0;
      }

      if (count) {
        l = Math.min(count * stride + offset, a.length);
      } else {
        l = a.length;
      }

      for (i = offset; i < l; i += stride) {
        vec[0] = a[i];
        vec[1] = a[i + 1];
        vec[2] = a[i + 2];
        vec[3] = a[i + 3];
        fn(vec, vec, arg);
        a[i] = vec[0];
        a[i + 1] = vec[1];
        a[i + 2] = vec[2];
        a[i + 3] = vec[3];
      }

      return a;
    };
  }();

  /**
   * Quaternion
   * @module quat
   */

  /**
   * Creates a new identity quat
   *
   * @returns {quat} a new quaternion
   */

  function create$4() {
    var out = new ARRAY_TYPE(4);

    if (ARRAY_TYPE != Float32Array) {
      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;
  }
  /**
   * 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$1(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;
  }
  /**
   * 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 > 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;
  }
  /**
   * 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;
  }
  /**
   * Normalize a quat
   *
   * @param {quat} out the receiving quaternion
   * @param {ReadonlyQuat} a quaternion to normalize
   * @returns {quat} out
   * @function
   */

  var normalize$2 = normalize$1;
  /**
   * 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
   */

  var rotationTo = function () {
    var tmpvec3 = create$2();
    var xUnitVec3 = fromValues(1, 0, 0);
    var yUnitVec3 = fromValues(0, 1, 0);
    return function (out, a, b) {
      var dot$1 = dot(a, b);

      if (dot$1 < -0.999999) {
        cross(tmpvec3, xUnitVec3, a);
        if (len(tmpvec3) < 0.000001) cross(tmpvec3, yUnitVec3, a);
        normalize(tmpvec3, tmpvec3);
        setAxisAngle(out, tmpvec3, Math.PI);
        return out;
      } else if (dot$1 > 0.999999) {
        out[0] = 0;
        out[1] = 0;
        out[2] = 0;
        out[3] = 1;
        return out;
      } else {
        cross(tmpvec3, a, b);
        out[0] = tmpvec3[0];
        out[1] = tmpvec3[1];
        out[2] = tmpvec3[2];
        out[3] = 1 + dot$1;
        return normalize$2(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
   */

  var sqlerp = function () {
    var temp1 = create$4();
    var temp2 = create$4();
    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
   */

  var setAxes = function () {
    var matr = 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$2(out, fromMat3(out, matr));
    };
  }();

  var toString = {}.toString;
  var isType = function (value, type) { return toString.call(value) === '[object ' + type + ']'; };

  var isString = (function (str) {
      return isType(str, 'String');
  });

  /**
   * 判断是否数字
   * @return {Boolean} 是否数字
   */
  var isNumber = function (value) {
      return isType(value, 'Number');
  };

  /**
   * Provides camera action & animation.
   */
  var AdvancedCamera = /*#__PURE__*/function (_Camera) {
    _inheritsLoose(AdvancedCamera, _Camera);
    function AdvancedCamera() {
      var _this;
      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }
      _this = _Camera.call.apply(_Camera, [this].concat(args)) || this;
      /**
       * switch between multiple landmarks
       */
      _this.landmarks = [];
      _this.landmarkAnimationID = void 0;
      return _this;
    }
    var _proto = AdvancedCamera.prototype;
    /**
     * Changes the azimuth and elevation with respect to the current camera axes
     * @param {Number} azimuth the relative azimuth
     * @param {Number} elevation the relative elevation
     * @param {Number} roll the relative roll
     */
    _proto.rotate = function rotate(azimuth, elevation, roll) {
      this.relElevation = gLite.getAngle(elevation);
      this.relAzimuth = gLite.getAngle(azimuth);
      this.relRoll = gLite.getAngle(roll);
      this.elevation += this.relElevation;
      this.azimuth += this.relAzimuth;
      this.roll += this.relRoll;
      if (this.type === gLite.CameraType.EXPLORING) {
        var rotX = setAxisAngle(create$4(), [1, 0, 0], gLite.deg2rad((this.rotateWorld ? 1 : -1) * this.relElevation));
        var rotY = setAxisAngle(create$4(), [0, 1, 0], gLite.deg2rad((this.rotateWorld ? 1 : -1) * this.relAzimuth));
        var rotZ = setAxisAngle(create$4(), [0, 0, 1], gLite.deg2rad(this.relRoll));
        var rotQ = multiply$1(create$4(), rotY, rotX);
        rotQ = multiply$1(create$4(), rotQ, rotZ);
        var rotMatrix = fromQuat(create$1(), rotQ);
        translate(this.matrix, this.matrix, [0, 0, -this.distance]);
        multiply(this.matrix, this.matrix, rotMatrix);
        translate(this.matrix, this.matrix, [0, 0, this.distance]);
      } else {
        if (Math.abs(this.elevation) > 90) {
          return this;
        }
        this.computeMatrix();
      }
      this._getAxes();
      if (this.type === gLite.CameraType.ORBITING || this.type === gLite.CameraType.EXPLORING) {
        this._getPosition();
      } else if (this.type === gLite.CameraType.TRACKING) {
        this._getFocalPoint();
      }
      this._update();
      return this;
    }
    /**
     * 沿水平(right) & 垂直(up)平移相机
     */;
    _proto.pan = function pan(tx, ty) {
      var coords = gLite.createVec3(tx, ty, 0);
      var pos = clone$1(this.position);
      add(pos, pos, scale(create$2(), this.right, coords[0]));
      add(pos, pos, scale(create$2(), this.up, coords[1]));
      this._setPosition(pos);
      this.triggerUpdate();
      return this;
    }
    /**
     * 沿 n 轴移动，当距离视点远时移动速度较快，离视点越近速度越慢
     */;
    _proto.dolly = function dolly(value) {
      var n = this.forward;
      var pos = clone$1(this.position);
      var step = value * this.dollyingStep;
      var updatedDistance = this.distance + value * this.dollyingStep;
      // 限制视点距离范围
      step = Math.max(Math.min(updatedDistance, this.maxDistance), this.minDistance) - this.distance;
      pos[0] += step * n[0];
      pos[1] += step * n[1];
      pos[2] += step * n[2];
      this._setPosition(pos);
      if (this.type === gLite.CameraType.ORBITING || this.type === gLite.CameraType.EXPLORING) {
        // 重新计算视点距离
        this._getDistance();
      } else if (this.type === gLite.CameraType.TRACKING) {
        // 保持视距，移动视点位置
        add(this.focalPoint, pos, this.distanceVector);
      }
      this.triggerUpdate();
      return this;
    };
    _proto.cancelLandmarkAnimation = function cancelLandmarkAnimation() {
      if (this.landmarkAnimationID !== undefined) {
        this.canvas.cancelAnimationFrame(this.landmarkAnimationID);
      }
    };
    _proto.createLandmark = function createLandmark(name, params) {
      var _position$, _position$2, _focalPoint$, _focalPoint$2;
      if (params === void 0) {
        params = {};
      }
      var _params = params,
        _params$position = _params.position,
        position = _params$position === void 0 ? this.position : _params$position,
        _params$focalPoint = _params.focalPoint,
        focalPoint = _params$focalPoint === void 0 ? this.focalPoint : _params$focalPoint,
        roll = _params.roll,
        zoom = _params.zoom;
      var camera = new gLite.runtime.CameraContribution();
      camera.setType(this.type, undefined);
      camera.setPosition(position[0], (_position$ = position[1]) !== null && _position$ !== void 0 ? _position$ : this.position[1], (_position$2 = position[2]) !== null && _position$2 !== void 0 ? _position$2 : this.position[2]);
      camera.setFocalPoint(focalPoint[0], (_focalPoint$ = focalPoint[1]) !== null && _focalPoint$ !== void 0 ? _focalPoint$ : this.focalPoint[1], (_focalPoint$2 = focalPoint[2]) !== null && _focalPoint$2 !== void 0 ? _focalPoint$2 : this.focalPoint[2]);
      camera.setRoll(roll !== null && roll !== void 0 ? roll : this.roll);
      camera.setZoom(zoom !== null && zoom !== void 0 ? zoom : this.zoom);
      var landmark = {
        name: name,
        matrix: clone(camera.getWorldTransform()),
        right: clone$1(camera.right),
        up: clone$1(camera.up),
        forward: clone$1(camera.forward),
        position: clone$1(camera.getPosition()),
        focalPoint: clone$1(camera.getFocalPoint()),
        distanceVector: clone$1(camera.getDistanceVector()),
        distance: camera.getDistance(),
        dollyingStep: camera.getDollyingStep(),
        azimuth: camera.getAzimuth(),
        elevation: camera.getElevation(),
        roll: camera.getRoll(),
        relAzimuth: camera.relAzimuth,
        relElevation: camera.relElevation,
        relRoll: camera.relRoll,
        zoom: camera.getZoom()
      };
      this.landmarks.push(landmark);
      return landmark;
    };
    _proto.gotoLandmark = function gotoLandmark(name, options) {
      var _this2 = this;
      if (options === void 0) {
        options = {};
      }
      var landmark = isString(name) ? this.landmarks.find(function (l) {
        return l.name === name;
      }) : name;
      if (landmark) {
        var _ref = isNumber(options) ? {
            duration: options
          } : options,
          _ref$easing = _ref.easing,
          easing = _ref$easing === void 0 ? 'linear' : _ref$easing,
          _ref$duration = _ref.duration,
          duration = _ref$duration === void 0 ? 100 : _ref$duration,
          _ref$easingFunction = _ref.easingFunction,
          easingFunction = _ref$easingFunction === void 0 ? undefined : _ref$easingFunction,
          _ref$onfinish = _ref.onfinish,
          onfinish = _ref$onfinish === void 0 ? undefined : _ref$onfinish;
        var epsilon = 0.01;
        if (duration === 0) {
          this.syncFromLandmark(landmark);
          if (onfinish) {
            onfinish();
          }
          return;
        }
        // cancel ongoing animation
        this.cancelLandmarkAnimation();
        var destPosition = landmark.position;
        var destFocalPoint = landmark.focalPoint;
        var destZoom = landmark.zoom;
        var destRoll = landmark.roll;
        var easingFunc = easingFunction || gLite.runtime.EasingFunction(easing);
        var timeStart;
        var endAnimation = function endAnimation() {
          _this2.setFocalPoint(destFocalPoint);
          _this2.setPosition(destPosition);
          _this2.setRoll(destRoll);
          _this2.setZoom(destZoom);
          _this2.computeMatrix();
          _this2.triggerUpdate();
          if (onfinish) {
            onfinish();
          }
        };
        var animate = function animate(timestamp) {
          if (timeStart === undefined) {
            timeStart = timestamp;
          }
          var elapsed = timestamp - timeStart;
          if (elapsed > duration) {
            endAnimation();
            return;
          }
          // use the same ease function in animation system
          var t = easingFunc(elapsed / duration);
          var interFocalPoint = create$2();
          var interPosition = create$2();
          var interZoom = 1;
          var interRoll = 0;
          lerp(interFocalPoint, _this2.focalPoint, destFocalPoint, t);
          lerp(interPosition, _this2.position, destPosition, t);
          interRoll = _this2.roll * (1 - t) + destRoll * t;
          interZoom = _this2.zoom * (1 - t) + destZoom * t;
          _this2.setFocalPoint(interFocalPoint);
          _this2.setPosition(interPosition);
          _this2.setRoll(interRoll);
          _this2.setZoom(interZoom);
          var dist$1 = dist(interFocalPoint, destFocalPoint) + dist(interPosition, destPosition);
          if (dist$1 <= epsilon && destZoom == undefined && destRoll == undefined) {
            endAnimation();
            return;
          }
          _this2.computeMatrix();
          _this2.triggerUpdate();
          if (elapsed < duration) {
            _this2.landmarkAnimationID = _this2.canvas.requestAnimationFrame(animate);
          }
        };
        this.canvas.requestAnimationFrame(animate);
      }
    };
    _proto.syncFromLandmark = function syncFromLandmark(landmark) {
      this.matrix = copy(this.matrix, landmark.matrix);
      this.right = copy$1(this.right, landmark.right);
      this.up = copy$1(this.up, landmark.up);
      this.forward = copy$1(this.forward, landmark.forward);
      this.position = copy$1(this.position, landmark.position);
      this.focalPoint = copy$1(this.focalPoint, landmark.focalPoint);
      this.distanceVector = copy$1(this.distanceVector, landmark.distanceVector);
      this.azimuth = landmark.azimuth;
      this.elevation = landmark.elevation;
      this.roll = landmark.roll;
      this.relAzimuth = landmark.relAzimuth;
      this.relElevation = landmark.relElevation;
      this.relRoll = landmark.relRoll;
      this.dollyingStep = landmark.dollyingStep;
      this.distance = landmark.distance;
      this.zoom = landmark.zoom;
    };
    return AdvancedCamera;
  }(gLite.Camera);

  gLite.runtime.CameraContribution = AdvancedCamera;

  exports.AdvancedCamera = AdvancedCamera;

  Object.defineProperty(exports, '__esModule', { value: true });

})));