<craft>
    <info>
        <title>Parameterized Spiral Column</title>
    </info>

    <param name="outterRadius" default="15" type="int"/>
    <param name="innerRadius" default="12" type="int"/>
    <param name="levels" default="40" type="int"/>
    <param name="threads" default="10" type="int"/>
    <param name="degrees" default="300" type="float"/>

    <craft name="radial-repeat" t="ungroup()">
        <param name="radius" default="10" type="int"/>
        <param name="n" default="10" type="int"/>
        <param name="degrees" default="180" type="float"/>
        <repeat n="{{n}}">
            <content>
                <prism t="scale(0.5)"></prism>
            </content>
        </repeat>
        <script>
            var n = this.children.length
            for (var i = 0; i < n; i++) {
                var solid = this.children[i]
                var angle = $params.degrees / n * i
                solid.translate($params.radius,0,0)
                solid.rotateZ(angle, 0, 0, 0)
            }
        </script>
    </craft>

    <script>
        $params.width = $params.outterRadius - $params.innerRadius
    </script>

    <radial-repeat radius="0" n="{{threads}}" degrees="360">
        <g l="lineupZ(1) solidify(rectangle)">
            <radial-repeat radius="{{innerRadius}}" n="{{levels}}" degrees="{{degrees}}">
                <rectangle width="{{width}}" height="2"></rectangle>
            </radial-repeat>
        </g>
    </radial-repeat>

</craft>