圆润变平的shader smooth to flat unity
Shader "Custom/Geometry/FlatShading"{
Properties
{
_Color("Color", Color) = (1,1,1,1)
_MainTex("Albedo", 2D) = "white" {}
}
SubShader
{
Tags{ "Queue"="Geometry" "RenderType"= "Opaque" "LightMode" = "ForwardBase" }
Pass
{
CGPROGRAM
#include "UnityCG.cginc"
#pragma vertex vert
#pragma geometry geom
#pragma fragment frag
float4 _Color;
sampler2D _MainTex;
struct v2g
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float3 vertex : TEXCOORD1;
};
struct g2f
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float light : TEXCOORD1;
};
v2g vert(appdata_full v)
{
v2g o;
o.vertex = v.vertex;
o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
o.uv = v.texcoord;
return o;
}
void geom(triangle v2g IN, inout TriangleStream<g2f> triStream)
{
g2f o;
// Compute the normal
float3 vecA = IN.vertex - IN.vertex;
float3 vecB = IN.vertex - IN.vertex;
float3 normal = cross(vecA, vecB);
normal = normalize(mul(normal, (float3x3) unity_WorldToObject));
// Compute diffuse light
float3 lightDir = normalize(_WorldSpaceLightPos0.xyz);
o.light = max(0., dot(normal, lightDir));
// Compute barycentric uv
o.uv = (IN.uv + IN.uv + IN.uv) / 3;
for(int i = 0; i < 3; i++)
{
o.pos = IN.pos;
triStream.Append(o);
}
}
half4 frag(g2f i) : COLOR
{
float4 col = tex2D(_MainTex, i.uv);
col.rgb *= i.light * _Color;
return col;
}
ENDCG
}
}
Fallback "Diffuse"
}
感谢楼主的无私分享！
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