/*
 * generators.add(name, fn1, fn2)
 *
 * name: the name will be show on the list
 * fn1: get necessary data
 *    + Will be called with an getter object
 * fn2: generate
 *    + data: get the requested data
 *    + Another setter object to place cube
 */
sgb.add('Sphere', function(a) {

    a.addText('Center of the sphere: ')
    .getNum('x')
    .getNum('y')
    .getNum('z')
    .getNum('Radius:', 3, 'r')
    .getNum('Cube size:', 0.5, 's')
    .getBoolean('Hollow:', true, 'h');
}, function(d, a) {

    d.check = function(x, y, z) {
        return Math.abs(
            (x - d.x) * (x - d.x) +
            (y - d.y) * (y - d.y) +
            (z - d.z) * (z - d.z) -
            d.r * d.r
        ) <= 0.1;
    }

    for(var i = d.x - d.r; i <= d.x + d.r; i+= d.s)
        for(var j = d.y - d.r; j <= d.y + d.r; j+= d.s)
            for(var k = d.z - d.r; k <= d.z + d.r; k+= d.s)
                if(d.check(i + d.s / 2, j + d.s / 2, k + d.s / 2)) {
                    a.addCube(i, j, k, d.s, d.s, d.s);
                }
    return a;
});