MathUtils.hpp

#pragma once
#ifndef __H__OCULAR_ENGINE_MATH_UTILS__H__
#define __H__OCULAR_ENGINE_MATH_UTILS__H__

#include "Vector4.hpp"

//------------------------------------------------------------------------------------------

namespace Ocular
{
    namespace Math
    {
        static Vector2f PointOnCircle(Vector2f const& center, float const radius, float const angle)
        {
            const float angleRad = DegreesToRadians(angle);
            
            Vector2f result = center;

            result.x += cosf(angleRad) * radius;
            result.y += sinf(angleRad) * radius;

            return result;
        }

        static Vector3f PointOnSphere(Vector3f const& center, float const radius, float const angleX, float const angleY)
        {
            // https://en.wikipedia.org/wiki/Spherical_coordinate_system#Cartesian_coordinates

            // Where, 
            //         r = radius
            //     theta = inclination = radX
            //       phi = azimuth = radY

            const float radX = DegreesToRadians(angleX);
            const float radY = DegreesToRadians(angleY);

            Vector3f result = center;

            result.x += radius * sinf(radX) * cosf(radY);
            result.y += radius * sinf(radX) * sinf(radY);
            result.z += radius * cosf(radX);

            return result;
        }
    }
}
//------------------------------------------------------------------------------------------

#endif#pragma once