c#脚本控制shader

如图所示，c#脚本控制shader颜色。

public class ControlColor : MonoBehaviour
{
    public Color color = new Color(1, 1, 1, 1);
    public Material mat;
    public void ChangeColor()
    {
        mat.SetVector("_Diffuse", color);
    }
}

[CustomEditor(typeof(ControlColor))]
public class Edit_ControlColor : Editor {
    ControlColor scr;//脚本本体
    SerializedObject serObj;
    SerializedProperty color;
    SerializedProperty mat;

    public void OnEnable()
    {
        scr = (ControlColor)target;
        serObj = new SerializedObject(target);
        color = serObj.FindProperty("color");
        mat = serObj.FindProperty("mat");
    }
    public override void OnInspectorGUI()
    {
        serObj.Update();
        EditorGUILayout.PropertyField(color,new GUIContent("Color"));
        EditorGUILayout.PropertyField(mat,new GUIContent("Mat"));
        serObj.ApplyModifiedProperties();
        scr.ChangeColor();
    }
}

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Custom/Color"
{
    Properties
    {
         _Diffuse("Diffuse",Color)=(1,1,1,1)
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            
            #include "UnityCG.cginc"
            float4 _Diffuse;

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
            };
            
            v2f vert (appdata v)
            {
                v2f o;
               o.pos=UnityObjectToClipPos(v.vertex);
               return o;
            }
            
            fixed4 frag (v2f i) : SV_Target
            {
                return _Diffuse;
            }
            ENDCG
        }
    }
}