Elliptical Arc Example

This example demonstrates creating elliptical arcs with layer-based colors. It shows how to define an elliptical arc using its center point, major/minor radii, and start/end angles. 

using CadSDK;
using CadSDK.Elements;
using CadSDK.Enums;
using CadSDK.Geometry;
using System.Numerics;

// Create a drawing session
var session = new DrawingSession
{
    ExportFormat = ExportFormat.DWG,
    CadVersion = CadVersion.Cad2018
};

// Define layers
var arcLayer = new Layer { Name = "TestLayer_EllipticalArc", ColorARGB = AciColors.Amber };
session.AddLayer(arcLayer);

// Elliptical arc using layer color
var ellipticalArc = new EllipticalArc(
    center: new Vector3(200, 300, 0),
    radiusX: 40f,
    radiusY: 20f,
    startAngle: MathF.PI / 4,
    endAngle: 5 * MathF.PI / 4)
{
    LayerName = arcLayer.Name
};
session.AddElement(ellipticalArc);

// Export the drawing
// You can signup and get your free API key
string apiKey = "your-api-key"; // Get your free API key from the dashboard
string outputPath = "drawing.dwg";
await session.ExportAndSaveAsync(apiKey, outputPath);
# Coming soon...

Key Points

  • Elliptical arcs extend the ellipse concept by adding start and end angles.
  • They are defined by:
    • Center point
    • Major and minor radii (RadiusX and RadiusY)
    • Start and end angles (in radians)
  • The elliptical arc's color is inherited from its assigned layer.