为每个国家/地区创建一个只有一个多边形的3D地球地球

Question

我正在为Unity创建地球的3D球面，并且每个国家/地区都需要有一个多边形。每个国家/地区都有一组2D点，这些2D点会根据生成的内容转换为3D点。但是，当我创建多边形时，某些顶点连接不正确。 我用Maya用此代码创建了多边形

with open("C:\\Users\\patilanz\\Downloads\\geo_countries_medium.json") as f:
    d = json.load(f)




def to_3d(x,y):
    #convert from degrees to radians
    longitude = math.radians(x)
    latitude = math.radians(y)

    # select a radius:
    radius = 10

    # project to 3d
    return (
        radius * math.cos(latitude) * math.cos(longitude), 
        radius * math.cos(latitude) * math.sin(longitude), 
        radius * math.sin(latitude)
    )

for feat in d.get("features"):
    r = []
    coords = feat.get("geometry").get("coordinates")
    type = feat.get("geometry").get("type")
    for coord in coords:
        for c in coord:
            if type == "MultiPolygon":
                r = []
                for a in c:
                    r.append(to_3d(a[0],a[1]))
                poly = cmds.polyCreateFacet(p=r)
                poly = cmds.rename(feat.get("properties").get("name"))
            else:
                r.append(to_3d(c[0],c[1]))

    if not type == "MultiPoligon":
        poly = cmds.polyCreateFacet(p=r)
        poly = cmds.rename(feat.get("properties").get("name"))

cmds.polySphere(r = 10 * 0.98)

The problem of incorrect joining vertices

我发现这个人正试图做同样的思考https://forum.processing.org/one/topic/drawing-countries-on-top-of-a-3d-sphere-from-set-of-boundaries.html

但是我不知道如何在Maya或Unity中实现它。