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Extents2d.md

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Extents2d Struct

Overview

The Extents2d struct represents a 2D bounding box defined by minimum and maximum points in the XY plane.

Namespace

Autodesk.AutoCAD.Geometry

Key Properties

Property Type Description
MinPoint Point2d Gets/sets the minimum corner point
MaxPoint Point2d Gets/sets the maximum corner point

Key Methods

Method Return Type Description
AddPoint(Point2d) void Expands extents to include point
AddExtents(Extents2d) void Expands extents to include another extents
ExpandBy(Vector2d) void Expands extents by vector offset
TransformBy(Matrix2d) void Transforms extents by matrix

Code Examples

Example 1: Creating 2D Extents

Point2d min = new Point2d(0, 0);
Point2d max = new Point2d(100, 50);
Extents2d extents = new Extents2d(min, max);

double width = max.X - min.X;
double height = max.Y - min.Y;

ed.WriteMessage($"\nExtents: {width} x {height}");

Example 2: Adding Points

Extents2d extents = new Extents2d(new Point2d(0, 0), new Point2d(10, 10));

// Add point outside current bounds
extents.AddPoint(new Point2d(15, 5));

ed.WriteMessage($"\nNew max: {extents.MaxPoint}"); // (15, 10)

Related Classes

  • Point2d - 2D corner points
  • Vector2d - For expanding extents
  • Extents3d - 3D bounding box

References