PhysicsShapeGroup2D.DeleteShape

При уничтожении фигуры в указанном shapeIndex, все другие фигуры, которые существуют выше указанного shapeIndex, будут иметь соответствующим образом обновленные индексы фигур.

using UnityEngine;
using UnityEngine.Assertions;

public class Example : MonoBehaviour
{
    void Start()
    {
        // Create a shape group.
        var shapeGroup = new PhysicsShapeGroup2D();

        // Add two Circles to the shape group.
        shapeGroup.AddCircle
            (
                center: Vector2.left,
                radius: 1f
            );
        var shapeIndex = shapeGroup.AddCircle
            (
                center: Vector2.right,
                radius: 1f
            );

        // Add a Box to the shape group.
        shapeGroup.AddBox
            (
                center: new Vector2(3f, 2f),
                size: new Vector2(1f, 1f)
            );

        // Validate the contents.
        Assert.AreEqual(1 + 1 + 1, shapeGroup.shapeCount);
        Assert.AreEqual(1 + 1 + 4, shapeGroup.vertexCount);
        Assert.AreEqual(PhysicsShapeType2D.Circle, shapeGroup.GetShape(0).shapeType);
        Assert.AreEqual(PhysicsShapeType2D.Circle, shapeGroup.GetShape(1).shapeType);
        Assert.AreEqual(PhysicsShapeType2D.Polygon, shapeGroup.GetShape(2).shapeType);

        // Delete the second Circle shape.
        shapeGroup.DeleteShape(shapeIndex);

        // Validate the contents.
        Assert.AreEqual(1 + 1, shapeGroup.shapeCount);
        Assert.AreEqual(1 + 4, shapeGroup.vertexCount);
        Assert.AreEqual(PhysicsShapeType2D.Circle, shapeGroup.GetShape(0).shapeType);
        Assert.AreEqual(PhysicsShapeType2D.Polygon, shapeGroup.GetShape(1).shapeType);
    }
}