ShadowEditor/THREE/Math/Spherical.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace THREE
{
    public class Spherical
    {
        function Spherical(radius, phi, theta )
        {

            this.radius = (radius !== undefined) ? radius : 1.0;
            this.phi = (phi !== undefined) ? phi : 0; // polar angle
            this.theta = (theta !== undefined) ? theta : 0; // azimuthal angle

            return this;

        }

        set: function(radius, phi, theta )
        {

            this.radius = radius;
            this.phi = phi;
            this.theta = theta;

            return this;

        },

	clone: function()
        {

            return new this.constructor().copy(this);

        },

	copy: function(other )
        {

            this.radius = other.radius;
            this.phi = other.phi;
            this.theta = other.theta;

            return this;

        },

	// restrict phi to be betwee EPS and PI-EPS
	makeSafe: function()
        {

            var EPS = 0.000001;
            this.phi = Math.max(EPS, Math.min(Math.PI - EPS, this.phi));

            return this;

        },

	setFromVector3: function(v )
        {

            return this.setFromCartesianCoords(v.x, v.y, v.z);

        },

	setFromCartesianCoords: function(x, y, z )
        {

            this.radius = Math.sqrt(x * x + y * y + z * z);

            if (this.radius === 0)
            {

                this.theta = 0;
                this.phi = 0;

            }
            else
            {

                this.theta = Math.atan2(x, z);
                this.phi = Math.acos(_Math.clamp(y / this.radius, -1, 1));

            }

            return this;

        }
    }
}