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- 逐像素
Shader "_MyShader/2_Specular/fragment"
{
Properties
{
_DiffuseColor ("DiffuseColor",COLOR) =(1,1,1,1)
_SpecularColor ("SpecularColor",COLOR) =(1,1,1,1)
_SpecularRange ("SpecularRange",Range(5,100)) = 20
}
SubShader
{
Pass
{
Tags{"LightMode" = "ForwardBase"}
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "Lighting.cginc"
fixed4 _DiffuseColor;
fixed4 _SpecularColor;
float _SpecularRange;
struct a2v {
float4 vertex:POSITION;
float3 normal:NORMAL;
};
struct v2f{
float4 pos:SV_POSITION;
fixed3 worldNormalDir:POSITION1;
fixed3 worldLightDir:POSITION2;
half3 reflectDir:POSITION3;
fixed3 worldViewDir:POSITION4;
//Blinn-Phong
fixed3 blinn_Phong_Dir:POSITION5;
};
v2f vert(a2v v){
v2f o;
o.pos=mul(UNITY_MATRIX_MVP,v.vertex);
o.worldLightDir = normalize(_WorldSpaceLightPos0);
o.worldNormalDir = normalize(mul(v.normal,(float3x3)_World2Object));
//计算反射向量
o.reflectDir = normalize(reflect(-o.worldLightDir,o.worldNormalDir));
//计算视角向量
o.worldViewDir = normalize(_WorldSpaceCameraPos - mul(_Object2World,v.vertex));
//Blinn-Phong
o.blinn_Phong_Dir = normalize(o.worldLightDir + o.worldViewDir);
return o;
}
fixed4 frag(v2f i):SV_Target{
//漫反射阶段
fixed3 ambientColor=UNITY_LIGHTMODEL_AMBIENT;
fixed3 diffuseColor = _LightColor0 * _DiffuseColor*saturate(dot(i.worldNormalDir,i.worldLightDir));
//高光阶段
fixed3 specularColor = _LightColor0 * _SpecularColor * pow(saturate(dot(i.reflectDir,i.worldViewDir)),_SpecularRange);
//Blinn-Phong光照
//fixed3 specularColor = _LightColor0 * _SpecularColor * pow(saturate(dot(i.worldNormalDir,i.blinn_Phong_Dir)),_SpecularRange);
fixed4 col = fixed4(diffuseColor + ambientColor + specularColor,1);
return col;
}
ENDCG
}
}
FallBack "Specular"
}
- 逐顶点
Shader "_MyShader/2_Specular/vertex"
{
Properties
{
_DiffuseColor ("DiffuseColor",COLOR) =(1,1,1,1)
_SpecularColor ("SpecularColor",COLOR) =(1,1,1,1)
_SpecularRange ("SpecularRange",Range(5,100)) = 20
}
SubShader
{
Pass
{
Tags{"LightMode" = "ForwardBase"}
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "Lighting.cginc"
fixed4 _DiffuseColor;
fixed4 _SpecularColor;
float _SpecularRange;
struct a2v {
float4 vertex:POSITION;
float3 normal:NORMAL;
};
struct v2f{
float4 pos:SV_POSITION;
fixed3 color:COLOR;
};
v2f vert(a2v v){
v2f o;
//漫反射阶段
o.pos=mul(UNITY_MATRIX_MVP,v.vertex);
fixed3 lightColor=_LightColor0;
fixed3 ambientColor=UNITY_LIGHTMODEL_AMBIENT;
fixed3 worldNormalDir=normalize(mul(v.normal,(float3x3)_World2Object));
fixed3 worldLightDir=normalize(_WorldSpaceLightPos0);
fixed3 diffuseColor=lightColor*_DiffuseColor*saturate(dot(worldNormalDir,worldLightDir));
//高光阶段
//计算反射光
//计算结果是一个half3类型的数据
half3 reflectDir = normalize(reflect(-worldLightDir,worldNormalDir));
//计算视角向量
fixed3 viewDir = normalize(_WorldSpaceCameraPos - mul(_Object2World,v.vertex));
//计算高光
fixed3 specularColor = lightColor * _SpecularColor * pow(saturate(dot(reflectDir,viewDir)),_SpecularRange);
o.color = diffuseColor + ambientColor + specularColor;
return o;
}
fixed4 frag(v2f i):SV_Target{
fixed4 col = fixed4 (i.color,1);
return col;
}
ENDCG
}
}
FallBack "Specular"
}