cesium - Creating a pyramid with polygon base in CZML -

i new in cesium, czml , javascript, trying create pyramid polygon base on ground. have latitude , longitude height of top point, have angle of each side. couldn't find method create yet. there way can create in czml file?

i'm not sure if can done 1 single packet. however, can done 1 single czml object. go website: http://cesiumjs.org/cesium/apps/sandcastle/index.html

and paste in code below. give starting point. may wish change opacity if dont want see-through. , may wish remove outline of polygon edges if dont want see how built pyramid out of multiple polygons.

the "pyramid" made 3 sided. extend include many sides wish.

    var czml = [       {         "id" : "document",         "name" : "czml geometries: polygon",         "version" : "1.0"       }, {         "id" : "orangepolygon",         "name" : "orange polygon per-position heights , outline",         "polygon" : {           "positions" : {             "cartographicdegrees" : [               -70.0, 35.0, 100000,               -72.0, 37.0, 0,               -68.0, 35.0, 0             ]           },           "material" : {             "solidcolor" : {               "color" : {                 "rgba" : [255, 100, 0, 100]               }             }           },       "extrudedheight" : 0,       "perpositionheight" : true,       "outline" : true,       "outlinecolor" : {         "rgba" : [0, 0, 0, 255]       }     }   },       {     "id" : "orangepolygon2",     "name" : "orange polygon per-position heights , outline",     "polygon" : {       "positions" : {         "cartographicdegrees" : [           -70.0, 35.0, 100000,           -70.0, 33.0, 0,           -68.0, 35.0, 0         ]       },       "material" : {         "solidcolor" : {           "color" : {             "rgba" : [255, 100, 0, 100]           }         }       },       "extrudedheight" : 0,       "perpositionheight" : true,       "outline" : true,       "outlinecolor" : {         "rgba" : [0, 0, 0, 255]       }     }   },      {     "id" : "orangepolygon3",     "name" : "orange polygon per-position heights , outline",     "polygon" : {       "positions" : {         "cartographicdegrees" : [           -70.0, 35.0, 100000,           -70.0, 33.0, 0,           -72.0, 37.0, 0,         ]       },       "material" : {         "solidcolor" : {           "color" : {             "rgba" : [255, 100, 0, 100]           }         }       },       "extrudedheight" : 0,       "perpositionheight" : true,       "outline" : true,       "outlinecolor" : {         "rgba" : [0, 0, 0, 255]       }     }   } ];  var viewer = new cesium.viewer('cesiumcontainer'); var datasource = cesium.czmldatasource.load(czml); viewer.datasources.add(datasource); viewer.zoomto(datasource);