How to create a curve with two points or three points

[Robertzhu]

I want to create a curve line, when I use API addFeatures, I don't know what is the params should be. 

[JoshuaBixby]

See Geometry objects—Common Data Types | ArcGIS for Developers, there are examples for curves.

[Robertzhu]

Hi, thanks for replied. When I tried to use that curve format, it shows error: { code: 1500, description: 'Incorrect geometry type.' }.

My format is : 

geometry: {

type: 'polyline',

// paths: [[[ item.from_geo[1], item.from_geo[0] ], [ mid1, mid0 ], [ item.to_geo[1], item.to_geo[0] ]]],

curvePaths: [[[ item.from_geo[1], item.from_geo[0] ], [ mid1, mid0 ], [ item.to_geo[1], item.to_geo[0] ]]],

spatialReference: { wkid: 4326 },

},