Shaders

Shader is a program which runs on the GPU to draw and color the objects you see on the screen. When i started developing games using unity, shaders really caught my attention. If you have decided to learn shaders remember what Uncle Ben said "With great power comes great responsibility" because shaders are famously painful yet rewarding. Below are the list of shaders that i have written.

1. Dissolve Shader

Here is the code:

Shader "Custom/DissolveShader"
{
Properties {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        _SliceGuide("Slice Guide (RGB)", 2D) = "white" {}
        _SliceAmount("Slice Amount", Range(0.0, 1.0)) = 0

        _BurnSize("Burn Size", Range(0.0, 1.0)) = 0.15
        _BurnRamp("Burn Ramp (RGB)", 2D) = "white" {}
        _BurnColor("Burn Color", Color) = (1,1,1,1)

        _EmissionAmount("Emission amount", float) = 2.0
    }
    SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200
        Cull Off
        CGPROGRAM
        #pragma surface surf Lambert addshadow
        #pragma target 3.0

        fixed4 _Color;
        sampler2D _MainTex;
        sampler2D _SliceGuide;
        sampler2D _BumpMap;
        sampler2D _BurnRamp;
        fixed4 _BurnColor;
        float _BurnSize;
        float _SliceAmount;
        float _EmissionAmount;

        struct Input {
            float2 uv_MainTex;
        };


        void surf (Input IN, inout SurfaceOutput o) {
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            half test = tex2D(_SliceGuide, IN.uv_MainTex).rgb - _SliceAmount;
            clip(test);
             
            if (test < _BurnSize && _SliceAmount > 0) {
                o.Emission = tex2D(_BurnRamp, float2(test * (1 / _BurnSize), 0)) * _BurnColor * _EmissionAmount;
            }

            o.Albedo = c.rgb;
            o.Alpha = c.a;
        }
        ENDCG
    }
    FallBack "Diffuse"

}