如何在着色器上修复法线

Question

我的着色器有问题 made/cobbled 代码位

最初我的计划是在运行时是一个着色器 Shader on disabled object? 但这似乎是错误的做法，因为我现在的理解是着色器不能在运行时交换。

所以我希望能够修正我的着色器，这样我就可以从彩色渐变到灰度但没有部分模型消失。我真的不懂着色器...

我目前的代码

Shader "Custom/GreyScaleToColour"
{
Properties
{
    [PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
    _Color("Tint", Color) = (1,1,1,1)
    [MaterialToggle] PixelSnap("Pixel snap", Float) = 0
    [HideInInspector] _RendererColor("RendererColor", Color) = (1,1,1,1)
    [HideInInspector] _Flip("Flip", Vector) = (1,1,1,1)
    [PerRendererData] _AlphaTex("External Alpha", 2D) = "white" {}
    [PerRendererData] _EnableExternalAlpha("Enable External Alpha", Float) = 0
    _EffectAmount("Effect Amount", Range(0, 1)) = 1.0
    _Brightness("Brightness", Range(0, 1.5)) = 0.5
}

    SubShader
    {
        Tags
        {
            "Queue" = "Transparent"
            "IgnoreProjector" = "True"
            "RenderType" = "Transparent"
            "PreviewType" = "Plane"
            "CanUseSpriteAtlas" = "True"
        }

        //Cull Off
        Lighting Off
        ZWrite Off
        Blend One OneMinusSrcAlpha

        CGPROGRAM
        #pragma surface surf Lambert vertex:vert nofog nolightmap nodynlightmap keepalpha noinstancing
        #pragma multi_compile _ PIXELSNAP_ON
        #pragma multi_compile _ ETC1_EXTERNAL_ALPHA
        #include "UnitySprites.cginc"

        struct Input
        {
            float2 uv_MainTex;
            fixed4 color;
        };

        void vert(inout appdata_full v, out Input o)
        {
            v.vertex.xy *= _Flip.xy;

            #if defined(PIXELSNAP_ON)
            v.vertex = UnityPixelSnap(v.vertex);
            #endif

            UNITY_INITIALIZE_OUTPUT(Input, o);
            o.color = v.color * _Color * _RendererColor;
        }
        uniform float _EffectAmount;
        uniform float _Brightness;

        void surf(Input IN, inout SurfaceOutput o)
        {
            fixed4 c = SampleSpriteTexture(IN.uv_MainTex) * IN.color;
            c.rgb = lerp(c.rgb, dot(c.rgb, float3(0.3, 0.59, 0.11)), _EffectAmount);
            //o.Albedo = c.rgb * c.a;
            o.Albedo = c.rgb * _Brightness;
            //o.Albedo = (c.r + c.g + c.b) / 3 * _Brightness;
            o.Alpha = c.a;
        }
        ENDCG
    }

        Fallback "Sprite/Diffuse"
}

部分模型消失...

奇怪的人工制品出现

它的大致外观

谢谢娜塔莉

Answer 1

关于在运行时交换着色器 - 您不需要在运行时交换着色器。您可以简单地 enable/disable 具有正确着色器的不同游戏对象。

// Assigned in the Editor
GameObject disabledGO; // Contains the Material with the Disabled Shader
GameObject normalGO; // Contains the Material with the Normal Shader

bool isDisabled = false;

private void Start()
{
    disabledGO.SetActive(isDisabled);
    normalGO.SetActive(!isDisabled);
}

private void Update()
{
    if (Input.GetKey(KeyCode.E))
    {
        isDisabled = !isDisabled;
        disabledGO.SetActive(isDisabled);
        normalGO.SetActive(!isDisabled);
    }
}

如何在着色器上修复法线

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