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*渐变纹理
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zengzhiwei committed Jul 22, 2019
1 parent a0bbf87 commit 47a7ebf
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165 changes: 165 additions & 0 deletions Assets/Shader/_Aver3/07BaseTexture/20190713.unity
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6 changes: 5 additions & 1 deletion Assets/Shader/_Aver3/07BaseTexture/Ramp Texture.mat
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Expand Up @@ -7,7 +7,7 @@ Material:
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Expand Down Expand Up @@ -54,6 +54,10 @@ Material:
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56 changes: 18 additions & 38 deletions Assets/Shader/_Aver3/07BaseTexture/Ramp Texture.shader
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@@ -1,4 +1,5 @@
Shader "_Aver3/Ramp Texture"
//2019.07.22 渐变纹理
Shader "_Aver3/Ramp Texture"
{
Properties
{
Expand All @@ -25,10 +26,9 @@
struct v2f
{
float4 vertex : SV_POSITION;
float4 uv : TEXCOORD0;
float4 TangentToWorld0 : TEXCOORD1;
float4 TangentToWorld1 : TEXCOORD2;
float4 TangentToWorld2 : TEXCOORD3;
float2 uv : TEXCOORD0;
float3 worldNormal : TEXCOORD1;
float3 worldPos : TEXCOORD2;
};

sampler2D _RampTex;
Expand All @@ -41,47 +41,27 @@
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);

float3 worldPos = mul(unity_ObjectToWorld,v.vertex).xyz;
float3 worldNormal = UnityObjectToWorldNormal(v.normal);
float3 worldBinormal = cross(worldNormal,worldTangent) * v.tangent.w;

o.worldPos = mul(unity_ObjectToWorld,v.vertex).xyz;
o.worldNormal = UnityObjectToWorldNormal(v.normal);
o.uv = TRANSFORM_TEX(v.texcoord, _RampTex);
return o;
}

// 得到切线空间法线方向，
fixed4 frag (v2f i) : SV_Target
{
float3 worldPos = float3(i.TangentToWorld0.w,i.TangentToWorld1.w,i.TangentToWorld2.w);
fixed3 lightDir = normalize(UnityWorldSpaceLightDir(worldPos));
fixed3 viewDir = normalize(UnityWorldSpaceViewDir(worldPos));

//fixed3 tangentLightDir = normalize(i.lightDir);
//fixed3 tangentViewDir = normalize(i.viewDir);
//
//// 获取法线贴图的像素
fixed4 packedNormal = tex2D(_BumpMap, i.uv.zw);
//fixed3 tangentNormal;
//// 如果纹理没有标记成法线贴图
////tangentNormal.xy = (packedNormal.xy * 2 - 1) * _BumpScale;
////tangentNormal.z = sqrt(1.0 - saturate(dot(tangentNormal.xy, tangentNormal.xy)));
//
//// 如果标记成了法线贴图，可以用内置函数
fixed3 normal = UnpackNormal(packedNormal);
normal.xy *= _BumpScale;
normal.z = sqrt(1.0 - saturate(dot(normal.xy, normal.xy)));
// 把法线从切线空间转到世界空间
normal = normalize(fixed3(dot(i.TangentToWorld0.xyz,normal),dot(i.TangentToWorld1.xyz,normal),dot(i.TangentToWorld2.xyz,normal)));

//使用tex2D做纹理采样，将采样结果和颜色属性_Color相乘作为反射率
fixed3 albedo = tex2D(_MainTex,i.uv).rgb * _Color.rgb;

fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz * albedo;
// 顶点和法线的normalize会有一丝区别
fixed3 worldNormal = normalize(i.worldNormal);
fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(i.worldPos));
fixed3 worldViewDir = normalize(UnityWorldSpaceViewDir(i.worldPos));

fixed3 diffuse = _LightColor0.rgb * albedo * max(0, dot(normal,lightDir));
fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz;
fixed halfLambert = 0.5 * dot(worldNormal,worldLightDir) + 0.5;
fixed3 albedo = tex2D(_RampTex,fixed2(halfLambert,halfLambert)).rgb * _Color.rgb;
fixed3 diffuse = _LightColor0.rgb * albedo;

fixed3 halfDir = normalize(lightDir + viewDir);
fixed3 specular = _LightColor0.rgb * _Specular * pow(saturate(dot(halfDir,normal)), _Gloss);
fixed3 halfDir = normalize(worldLightDir + worldViewDir);
fixed3 specular = _LightColor0.rgb * _Specular * pow(saturate(dot(halfDir,worldNormal)), _Gloss);

return fixed4(ambient + diffuse + specular,1.0);
}
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Binary file added Assets/Shader/_Aver3/07BaseTexture/Ramp_Texture0.psd
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68 changes: 68 additions & 0 deletions Assets/Shader/_Aver3/07BaseTexture/Ramp_Texture0.psd.meta
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