ama-team/php-projection-framework

<?php

namespace AmaTeam\Image\Projection;

class Constants
{
    const INTERPOLATION_NONE = 'none';
    const INTERPOLATION_BILINEAR = 'bilinear';

    const TYPE_CUBE_MAP = 'CubeMap';
    const TYPE_EQUIRECTANGULAR = 'Equirectangular';
}