Unity 2018 Shaders and Effects Cookbook - Third Edition

How to do it...

Let's start by editing the Vertex and Fragment Shaders:

1. Create a Properties block with these items in it:

Properties {  _MainTex("Base (RGB) Trans (A)", 2D) = "white" {}  _Colour("Colour", Color) = (1,1,1,1)  _BumpMap("Noise text", 2D) = "bump" {}  _Magnitude("Magnitude", Range(0,1)) = 0.05}

2. Add their variables in the second pass:

sampler2D _MainTex;fixed4 _Colour;sampler2D _BumpMap;float _Magnitude;

3. Add the texture information to the input and output structures:

float2 texcoord : TEXCOORD0;

4. Transfer the UV data from the input to the output structure:

// Vertex functionvertOutput vert(vertInput v) {  vertOutput o;  o.vertex = UnityObjectToClipPos(v.vertex);  o.uvgrab = ComputeGrabScreenPos(o.vertex);  o.texcoord = v.texcoord; ...