PhysicsShapeGroup2D.Clear

描述

清除 PhysicsShapeGroup 中的所有顶点和形状。

此调用会清除用于存储顶点和形状的列表，但会保留当前形状组的容量（实际上是创建一个空形状组）。

using UnityEngine;
using UnityEngine.Assertions;

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

        // Add a Circle to the shape group.
        shapeGroup.AddCircle
            (
                center: Vector2.zero,
                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, shapeGroup.shapeCount);
        Assert.AreEqual(1 + 4, shapeGroup.vertexCount);
        Assert.AreEqual(PhysicsShapeType2D.Circle, shapeGroup.GetShape(0).shapeType);
        Assert.AreEqual(PhysicsShapeType2D.Polygon, shapeGroup.GetShape(1).shapeType);

        // Clear the shape group.
        shapeGroup.Clear();

        // Validate the contents.
        Assert.AreEqual(0, shapeGroup.shapeCount);
        Assert.AreEqual(0, shapeGroup.vertexCount);
    }
}