Question

JavaScript => public function Clear(): void;
C# => public void Clear();

Description 描述

Clear material property values.

清除材质属性值。

Graphics.DrawMesh copies the passed property block, so the most efficient way of using it is to create one block and reuse it for all DrawMesh calls. Use Clear to clear block's values, and SetFloat, SetVector, SetColor, SetMatrix to add values.

Graphics.DrawMesh 拷贝传递属性块，因此最有效的方式是使用它为所有DrawMesh调用来创建一个属性块并重用。使用Clear来清除块的值，以及 SetFloat、SetVector、SetColor、SetMatrix来添加值。

JavaScript:

	var aMesh : Mesh;
	var aMaterial : Material = new Material(Shader.Find("VertexLit"));
 
	function Update() {
		var materialProperty : MaterialPropertyBlock = new MaterialPropertyBlock();
 
		// Clear any property and add a red color
		materialProperty.Clear();
		materialProperty.SetColor("_Color", Color.red);
		Graphics.DrawMesh(aMesh, Vector3(5,0,0), Quaternion.identity,
				  aMaterial, 0, null, 0, materialProperty);
		// Clear any property and add a green color
		materialProperty.Clear();
		materialProperty.SetColor("_Color", Color.green);
		Graphics.DrawMesh(aMesh, Vector3(-5,0,0), Quaternion.identity,
				  aMaterial, 0, null, 0, materialProperty);
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public Mesh aMesh;
    public Material aMaterial = new Material(Shader.Find("VertexLit"));
    void Update() {
        MaterialPropertyBlock materialProperty = new MaterialPropertyBlock();
        materialProperty.Clear();
        materialProperty.SetColor("_Color", Color.red);
        Graphics.DrawMesh(aMesh, new Vector3(5, 0, 0), Quaternion.identity, aMaterial, 0, null, 0, materialProperty);
        materialProperty.Clear();
        materialProperty.SetColor("_Color", Color.green);
        Graphics.DrawMesh(aMesh, new Vector3(-5, 0, 0), Quaternion.identity, aMaterial, 0, null, 0, materialProperty);
    }
}

MaterialPropertyBlock