Question Translating and Rotating textures/ UVs

Hi there,

So, I am very new to shaders and all that stuff and I have been trying to work on rotating and translating my texture/UVs via user input. Currently, the user can rotate the texture but when it comes to translation the texture will move in the newly rotated direction, not along a world space direction.

What I want is very similar to how in Unity you can rotate an object but can still move it around with the world space coordinates and for that object to travel along XY world coordinates.

I have tried in Unity's shader language and Unity's shader graph.

Thanks for any help.

 

Move first, then rotate.

 

Hi there, So when I translate first my pivot point becomes a translation point instead. Sorry, it's a little hard to explain to me when I'm pretty unfamiliar.

Code (CSharp):

1. Shader "Unlit/TRSHLSL"
2. {
3.     Properties
4.     {
5.         _MainTex ("Texture", 2D) = "white" {}
6.         _Angle ("Angle", Float) = 0.0
7.        _Pivot ("Pivot", Vector) = (0.5,0.5,0,0)
8.        _Translate("Translate", Vector) = (0,0,0,0)
9.  
10.     }
11.     SubShader
12.     {
13.         Tags { "RenderType"="Opaque" }
14.         LOD 100
15.  
16.         Pass
17.         {
18.             CGPROGRAM
19.             #pragma vertex vert
20.             #pragma fragment frag
21.  
22.             #include "UnityCG.cginc"
23.  
24.             struct appdata
25.             {
26.                 float4 vertex : POSITION;
27.                 float2 uv : TEXCOORD0;
28.             };
29.  
30.             struct v2f
31.             {
32.                 float2 uv : TEXCOORD0;
33.                 float4 vertex : SV_POSITION;
34.             };
35.  
36.             sampler2D _MainTex;
37.             float4 _MainTex_ST;
38.             float _Angle;
39.             float2 _Pivot;
40.             float2 _Translate;
41.  
42.             v2f vert (appdata v)
43.             {
44.                 v2f o;
45.                 o.vertex = UnityObjectToClipPos(v.vertex);
46.                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
47.                 o.uv.xy += _Translate;
48.                 //o.vertex = mul(UNITY_MATRIX_VP, fixed4(worldPosition, 1.0f))
49.                 //rotate uvs around axis
50.                 //_Pivot = (0.5,0.5);
51.  
52.              
53.                 o.uv -= _Pivot.xy;
54.                
55.                 // Rotation Matrix
56.                 float s = sin(_Angle);
57.                 float c = cos(_Angle);
58.                 float4x4 m = float4x4(c,-s,0,0,
59.                                     s,c,0,0,
60.                                     0,0,1,0,
61.                                     0,0,0,1);
62.                
63.                 float2 newUV = o.uv - _Pivot.xy;
64.                 o.uv = mul(m,o.uv);
65.                 o.uv += _Pivot.xy;
66.                
67.  
68.                 return o;
69.             }
70.  
71.             fixed4 frag (v2f i) : SV_Target
72.             {
73.                 // sample the texture
74.                 fixed4 col = tex2D(_MainTex, i.uv);
75.                 return col;
76.             }
77.             ENDCG
78.         }
79.     }
80. }