Question

JavaScript => public function SetMatrix(propertyName: string, matrix: Matrix4x4): void;
JavaScript => public function SetMatrix(nameID: int, matrix: Matrix4x4): void;
C# => public void SetMatrix(string propertyName, Matrix4x4 matrix);
C# => public void SetMatrix(int nameID, Matrix4x4 matrix);

Description 描述

Set a named matrix for the shader.

为这个shader设置一个命名矩阵。

This is mostly used with custom shaders that need extra matrix parameters. Matrix parameters are not exposed in the material inspector, but can be set and queried with SetMatrix and GetMatrix from scripts.

这主要用于自定义着色器需要额外矩阵参数。矩阵参数不会将其公开在材质的检视面板中，但可以在脚本中通过SetMatrix 和 GetMatrix设置和查询。

See Also: GetMatrix, Shader.PropertyToID.

JavaScript:

#pragma strict
public var rotateSpeed: float = 30f;
public function Update() {
	// Construct a rotation matrix and set it for the shader
	var rot: var = Quaternion.Euler(0, 0, Time.time * rotateSpeed);
	var m: var = Matrix4x4.TRS(Vector3.zero, rot, Vector3.one);
	GetComponent.<Renderer>().material.SetMatrix("_TextureRotation", m);
}

JavaScript:

// Use this shader on an object together with the above example script.
// The shader transforms texture coordinates with a matrix set from a script.
Shader "RotatingTexture"
{
    Properties
    {
        _MainTex ("Base (RGB)", 2D) = "white" {}
    }
    SubShader
    {
        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
 
            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 pos : SV_POSITION;
            };
 
            float4x4 _TextureRotation;
 
            v2f vert (float4 pos : POSITION, float2 uv : TEXCOORD0)
            {
                v2f o;
                o.pos = mul(UNITY_MATRIX_MVP, pos);
                o.uv = mul(_TextureRotation, float4(uv,0,1)).xy;
                return o;
            }
 
            sampler2D _MainTex;
            fixed4 frag (v2f i) : SV_Target
            {
                return tex2D(_MainTex, i.uv);
            }
            ENDCG
        }
    }
}

C#:

using UnityEngine;
 
public class ExampleClass : MonoBehaviour
{
    // Attach to an object that has a Renderer component,
    // and use material with the shader below.
    public float rotateSpeed = 30f;
    public void Update ()
    {
        // Construct a rotation matrix and set it for the shader
        var rot = Quaternion.Euler (0, 0, Time.time * rotateSpeed);
        var m = Matrix4x4.TRS (Vector3.zero, rot, Vector3.one);
        GetComponent<Renderer>().material.SetMatrix ("_TextureRotation", m);
    }
}

C#:

// Use this shader on an object together with the above example script.
// The shader transforms texture coordinates with a matrix set from a script.
Shader "RotatingTexture"
{
    Properties
    {
        _MainTex ("Base (RGB)", 2D) = "white" {}
    }
    SubShader
    {
        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
 
            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 pos : SV_POSITION;
            };
 
            float4x4 _TextureRotation;
 
            v2f vert (float4 pos : POSITION, float2 uv : TEXCOORD0)
            {
                v2f o;
                o.pos = mul(UNITY_MATRIX_MVP, pos);
                o.uv = mul(_TextureRotation, float4(uv,0,1)).xy;
                return o;
            }
 
            sampler2D _MainTex;
            fixed4 frag (v2f i) : SV_Target
            {
                return tex2D(_MainTex, i.uv);
            }
            ENDCG
        }
    }
}

Material