unity surface shader植物

Shader "LT/Surface/Plant" {
Properties {
_EmissiveColor ("EmissiveColor", Color) = (1,1,1,1)
_MainTex ("Albedo (RGB)", 2D) = "white" {}
_MySliderValue ("Slider Value", Range(0,10)) = 2.5
_TransVal("Transparency Value", Range(0,1)) = 0.5
}
SubShader {
Tags { 
"RenderType"="TransparentCutout" "Queue"="AlphaTest" 
}
LOD 200
CGPROGRAM

// Physically based Standard lighting model, and enable shadows on all light types
#pragma surface surf BasicDiffuse alphatest:_TransVal  addshadow fullforwardshadows    // alpha:fade 

// Use shader model 3.0 target, to get nicer looking lighting
#pragma target 3.0

sampler2D _MainTex;
float4 _EmissiveColor;
float4 _AmbientColor;
float _MySliderValue;

struct Input {
float2 uv_MainTex;
};


void surf (Input IN, inout SurfaceOutput o) {
// Albedo comes from a texture tinted by color


fixed4 c = tex2D (_MainTex, IN.uv_MainTex) ;
c.rgb *= pow ((_EmissiveColor *3),_MySliderValue);


o.Albedo = c.rgb;
o.Alpha =c.a;
} 

//half4 LightingName (SurfaceOutput s, half3 lightDir, half atten){}
//這個函數被用於forward rendering（正向渲染），但是不需要考慮view direction（觀察角度）時。
//half4 LightingName_PrePass (SurfaceOutput s, half4 light){}
//這個函數被用於需要使用defferred rendering（延遲渲染）時。

inline float4 LightingBasicDiffuse(SurfaceOutput s,fixed3 lightDir,half3 viewDir, fixed atten)
{
fixed3 h = normalize(lightDir + viewDir);

half difLight = max(0,dot(s.Normal,lightDir));
float nh = max(0,dot(s.Normal,h)); 
float spec = pow (nh,48.0);
half4 c ;
c.rgb = (s.Albedo * _LightColor0.rgb * difLight + _LightColor0.rgb* spec ) * (atten * 2);
c.a = s.Alpha;
return c;
}

ENDCG
}
FallBack "Diffuse"

}