scene.yaml

# to do
# colours
# check the osm layers that are available
# topo, contours?

cameras:
    camera1:
        type: perspective

lights:
    #light1:
    #    type: point
    #    origin: ground
    #    position: [0, 0, 800px]
    #    diffuse: .4
        #specular: .3
    light2:
        visible: true
        type: directional
      #position: [-74.0170, 40.7031, 100]
      #origin: world
        ambient: .4
        diffuse: .6
        specular: .9

sources:
    osm:
        type: TopoJSON
        url:  //vector.mapzen.com/osm/all/{z}/{x}/{y}.topojson?api_key=vector-tiles-E7BgIC4

layers:
#    earth:
#        data: { source: osm }
#        draw:
#            polygons:
#                order: 0
#                color: [0,0,0,1]

#    landuse:
#        data: { source: osm }
#        draw:
#            polygons:
#                order: 1
#                #color: [0, 62, 128] ?
#                color: '#556483'

#    water:
#        data: { source: osm }
#        draw:
#            polygons:
#                order: 2
#                color: [255,255,255,1]

#    roads:
#        data: { source: osm }
#        filter:
#          # not: { kind: ["path", "rail"] }
#        draw:
#            lines:
#                order: 4
#                color: '#000000'
#                width: 6
#                cap: butt
#        highway:
#            filter:
#                kind: highway
#            draw:
#                lines:
#                    order: 5
#                    color: '#000000'
#                    width: 4
#
#        minor_road:
#            filter:
#                kind: minor_road
#            draw:
#                lines:
#                    order: 3
#                    color: '#000000'
#                    width: 3

    buildings:
        data: { source: osm }
        draw:
            polygons:
                order: 9
                color: '#000000' #|
                    #    function () {
                    #        var h = feature.height || 20;
                    #        h = Math.min((h + 50)/ 255, .3); // max brightness: .5
                    #        h = Math.max(h, .1); // min brightness: .4
                    #        return [h, h, h];
                    #    }
        3d-buildings:
                    #filter: { $zoom: { min: 13 } }
                    draw:
                        polygons:
                            extrude: function () { return feature.height > 2 || $zoom >= 10; }