適当なトゥーンシェーダー

toom.shader

Shader "Unlit/toon"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _ShadowColor ("ShadowColor", Color) = (1,1,1,1)
        _TextureBorder ("TextureBorder", Range(1,0)) = 0.7
        _ShadowBorder ("ShadowBorder", Range(1,0)) = 0.3
        _LambertCorrect ("_LambertCorrect", Range(1,0)) = 0.5
        _MiddleShadow ("_MiddleShadow", Range(1,0)) = 0.5
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"
           #include "Lighting.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
                float3 normal : NORMAL;
            };

            sampler2D _MainTex;
            half _ShadowBorder;
            half _TextureBorder;
            half _LambertCorrect;
            half _MiddleShadow;
            float4 _MainTex_ST;
            float4 _ShadowColor;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                o.normal = UnityObjectToWorldNormal(v.normal);
                return o;
            }

            fixed3 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 col = tex2D(_MainTex, i.uv);
                
                float3 lightDir = normalize(_WorldSpaceLightPos0.xyz);
                float NdotL = dot( i.normal, lightDir) *0.5 + _LambertCorrect;
                
                bool2 texOrShadow;
                texOrShadow.x = step(_TextureBorder, NdotL);
                texOrShadow.y = step(NdotL, _ShadowBorder);
                
                float3 textureColor = col.xyz * texOrShadow.x;
                float3 middleColor = (lerp(col.xyz, _ShadowColor,_MiddleShadow ))* step(NdotL, _TextureBorder) * step(_ShadowBorder, NdotL) ;
                float3 shadowColor = _ShadowColor * texOrShadow.y;
                
                return textureColor + middleColor + shadowColor;
            }
            ENDCG
        }
    }
}

ToonWithOutline.shader

Shader "Unlit/toon"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _ShadowColor ("ShadowColor", Color) = (1,1,1,1)
        _TextureBorder ("TextureBorder", Range(1,0)) = 0.7
        _ShadowBorder ("ShadowBorder", Range(1,0)) = 0.3
        _LambertCorrect ("_LambertCorrect", Range(1,0)) = 0.5
        _MiddleShadow ("_MiddleShadow", Range(1,0)) = 0.5
        _OutlineSize ("_OutlineSize", float) = 0.01
        _OutlineColor ("OutlineColor", Color) = (1,1,1,1)
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"
            #include "Lighting.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
                float3 normal : NORMAL;
            };

            sampler2D _MainTex;
            half _ShadowBorder;
            half _TextureBorder;
            half _LambertCorrect;
            half _MiddleShadow;
            float4 _MainTex_ST;
            float4 _ShadowColor;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                o.normal = UnityObjectToWorldNormal(v.normal);
                return o;
            }

            fixed3 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 col = tex2D(_MainTex, i.uv);
                
                float3 lightDir = normalize(_WorldSpaceLightPos0.xyz);
                float NdotL = dot( i.normal, lightDir) *0.5 + _LambertCorrect;
                
                bool2 texOrShadow;
                texOrShadow.x = step(_TextureBorder, NdotL);
                texOrShadow.y = step(NdotL, _ShadowBorder);
                
                float3 textureColor = col.xyz * texOrShadow.x;
                float3 middleColor = (lerp(col.xyz, _ShadowColor,_MiddleShadow ))* step(NdotL, _TextureBorder) * step(_ShadowBorder, NdotL) ;
                float3 shadowColor = _ShadowColor * texOrShadow.y;
                
                return textureColor + middleColor + shadowColor;
            }
            ENDCG
        }
        
        Pass
        {
            Cull Front
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
            };

            struct v2f
            {
                float4 vertex : SV_POSITION;
            };
            
            half _OutlineSize;
            half4 _OutlineColor;

            v2f vert (appdata v)
            {
                v2f o;
                v.vertex += float4(v.normal * _OutlineSize, 0);   
                o.vertex = UnityObjectToClipPos(v.vertex); 
                return o;
            }
            
            fixed4 frag (v2f i) : SV_Target
            {               
                return _OutlineColor;
            }
            ENDCG
        }
    }
}

Toon.shader.shader

ToonWithOutline.shader