MaterialPropertyBlock.Clear

Description

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.

using UnityEngine;

public class Example : MonoBehaviour
{
    Mesh aMesh;
    Material aMaterial = new Material(Shader.Find("VertexLit"));

    void Update()
    {
        MaterialPropertyBlock materialProperty = new MaterialPropertyBlock();

        // Clear any property and add a red color
        materialProperty.Clear();
        materialProperty.SetColor("_Color", Color.red);
        Graphics.DrawMesh(aMesh, new 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, new Vector3(-5, 0, 0),
            Quaternion.identity, aMaterial, 0, null, 0, materialProperty);
    }
}