Question by Hannibal_Leo · Jun 10, 2016 at 09:50 PM · shader uv normal bumpmap

How to change shader normal uvs?

okay, I need that world coordinate uv thing, so I copied the one from the prototyping asset. but I can't quite understand how to write this right, I've searched for hours, but no one seems facing the same problem. I hope you can see it from the script, the error is in the line:

 o.Normal = UnpackNormal(tex2);

theres the full scipt/shader:

 Shader "Custom/NewSurfaceShader1" {
     Properties {
         _Color ("Color", Color) = (1,1,1,1)
         _MainTex ("Albedo (RGB)", 2D) = "white" {}
         _Glossiness ("Smoothness", Range(0,1)) = 0.5
         _Metallic ("Metallic", Range(0,1)) = 0.0
         _BumpMap("Bumpmap", 2D) = "bump" {}
         _BaseScale("Base Tiling", Vector) = (1,1,1,0)
     }
     SubShader {
         Tags { "RenderType"="Opaque" }
         LOD 200
         
         CGPROGRAM
         // Physically based Standard lighting model, and enable shadows on all light types
         #pragma surface surf Standard fullforwardshadows
 
         // Use shader model 3.0 target, to get nicer looking lighting
         #pragma target 3.0
 
         sampler2D _MainTex;
         sampler2D _BumpMap;
 
         struct Input {
             float2 uv_MainTex;
             float2 uv_BumpMap;
             float3 worldPos;
             float3 worldNormal;
         };
 
         half _Glossiness;
         half _Metallic;
         fixed4 _Color;
         fixed3 _BaseScale;
 
         void surf (Input IN, inout SurfaceOutputStandard o) {
 
             fixed4 texXY = tex2D(_MainTex, IN.worldPos.xy * _BaseScale.z);// IN.uv_MainTex);
             fixed4 texXZ = tex2D(_MainTex, IN.worldPos.xz * _BaseScale.y);// IN.uv_MainTex);
             fixed4 texYZ = tex2D(_MainTex, IN.worldPos.yz * _BaseScale.x);// IN.uv_MainTex);
             fixed3 mask = fixed3(
                 dot(IN.worldNormal, fixed3(0, 0, 1)),
                 dot(IN.worldNormal, fixed3(0, 1, 0)),
                 dot(IN.worldNormal, fixed3(1, 0, 0)));
 
             fixed4 tex =
                 texXY * abs(mask.x) +
                 texXZ * abs(mask.y) +
                 texYZ * abs(mask.z);
             fixed4 c = tex * _Color;
             o.Albedo = c.rgb;
 
 
             fixed4 texXY2 = tex2D(_BumpMap, IN.worldPos.xy * _BaseScale.z);// IN.uv_MainTex);
             fixed4 texXZ2 = tex2D(_BumpMap, IN.worldPos.xz * _BaseScale.y);// IN.uv_MainTex);
             fixed4 texYZ2 = tex2D(_BumpMap, IN.worldPos.yz * _BaseScale.x);// IN.uv_MainTex);
             fixed3 mask2 = fixed3(
                 dot(IN.worldNormal, fixed3(0, 0, 1)),
                 dot(IN.worldNormal, fixed3(0, 1, 0)),
                 dot(IN.worldNormal, fixed3(1, 0, 0)));
 
             fixed4 tex2 =
                 texXY2 * abs(mask2.x) +
                 texXZ2 * abs(mask2.y) +
                 texYZ2 * abs(mask2.z);
             o.Normal = UnpackNormal(tex2);
             //o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
 
             // Albedo comes from a texture tinted by color
             // Metallic and smoothness come from slider variables
             o.Metallic = _Metallic;
             o.Smoothness = _Glossiness;
             o.Alpha = c.a;
         }
         ENDCG
     }
     FallBack "Diffuse"
 }

thanks in advice

Add comment · Show 3

Namey5 · Jun 11, 2016 at 01:07 PM 0

What exactly are you trying to do? Is this some form of triplanar shader?

Hannibal_Leo · Jun 12, 2016 at 02:07 AM 0

Triplanar? I have a texture for each of my tiles and a second one with uses world coordinates and I want both to have a normal map. It's like the worldCoordinate Diffuse Shader, but I want to add a normal map to it. So how to make a normal map use WorldCoordinate UVs? (should I update the question title Tto this one?) I hope everyone knows what worldUVs mean, it's hard to explain, if you move a cube the texture stays in place and the texture can be bigger than the cube and if you put many cubes together you get the full texture or a part of it, so you can have a big scale texture on the same object, what's perfect for variety of you have any kind of procedural level out of cubes or planes or whatever elements.

Namey5 Hannibal_Leo · Jun 12, 2016 at 03:22 AM 0

Ah, ok. Triplanar texturing works in the same way, except uses object space coordinates rather than world space. I believe I did triplanar normals once, but I can't remember how I fixed this. Try the following:

              fixed4 texXY2 = tex2D(_Bump$$anonymous$$ap, IN.worldPos.xy * _BaseScale.z);// IN.uv_$$anonymous$$ainTex);
              fixed4 texXZ2 = tex2D(_Bump$$anonymous$$ap, IN.worldPos.xz * _BaseScale.y);// IN.uv_$$anonymous$$ainTex);
              fixed4 texYZ2 = tex2D(_Bump$$anonymous$$ap, IN.worldPos.yz * _BaseScale.x);// IN.uv_$$anonymous$$ainTex);
              fixed3 mask2 = fixed3(
                  dot(IN.worldNormal, fixed3(0, 0, 1)),
                  dot(IN.worldNormal, fixed3(0, 1, 0)),
                  dot(IN.worldNormal, fixed3(1, 0, 0)));
  
              fixed4 tex2 =
                  texXY2 * abs(mask2.x) +
                  texXZ2 * abs(mask2.y) * 2 - 1 +
                  texYZ2 * abs(mask2.z) * 2 - 1;
              o.Normal = UnpackNormal(tex2);

How to change shader normal uvs?

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