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Created December 16, 2017 00:15
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Space Puck Shader
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Unlit/Energy"
Properties //Defines the properties for the shader, shown the GUI and used by the SubShader. Default values are defined here.
_MainTex ("Texture", 2D) = "white" {}
_MainColor ("Color", Color) = (0.5, 0.5, 0.5, 1)
_Multiplier ("Multiplier", float) = 1
_WaveStrength ("Wave Strength", float) = 1
_Speed ("Speed", range(0.1,6)) = 1
_Amp ("Amplitude", float) = 1
_Offset ("Offset", float) = 0.2
SubShader //Where the actual shader starts. References the properties or game values.
Tags { //How the engine treats the shader, just for wildcards like transparency and stuff.
"IgnoreProjector" = "True"
"Queue" = "Transparent"
"RenderType" = "Transparent"
Pass //The "Shader shader bit" -Dickie 2017 You can have multiple passes which can work with or in place of other passes. The bit that controls the mesh and meterial. Pretty much...
//Blend One One Addative shading
Blend SrcAlpha OneMinusSrcAlpha //Using the Alpha channel in 8 Bit, not 1 Bit.
Cull Off //Turn off back face culling, Cull back/front. Front would be used for outlines.
ZWrite Off //Writing to the Z-buffer, can be used for masking with lighting with Z-Test.
CGPROGRAM //Starting the CG code, talking in hard numbers and moving away from pre-compiled wrappers.
#pragma vertex vert //Defining shader as Vertex shader, not surface shader (which is actually just a fancy fragment shader)
#pragma fragment frag //So the Vert/Frag bit is what we're calling each thing. Vertex could be called "Steve" or "Vertex the 3rd"
#include "UnityCG.cginc" //Refering to an external script that holds functions and such. Such as storing a wind function for grass and trees.
struct appdata //Calling model from information from the game.
float4 vertex : POSITION;
float2 uv : TEXCOORD0; //Call UV data
float3 normal : NORMAL;
struct v2f //Storing vertex information so it can be read by the fragment shader
float2 uv : TEXCOORD0;
float4 vertex : SV_POSITION;
float sine : TEXCOORD1;
float offsetsine : TEXCOORD2;
sampler2D _MainTex;
float4 _MainTex_ST; //Float is defining the type of variable you're using
float _Multiplier; //_Thing is calling the properties to used by the Pass
float4 _MainColor; //This is hard core CG lingo
float _WaveStrength;
float _Speed;
float _Amp;
float _Offset;
v2f vert (appdata v)//You're plugging App Data in and calling it V, which is then used as Vertex Data, and then sending that to v2f
v2f o; //Creating a variable to define V2F, sure.
o.sine = sin(_Time.y*_Speed + v.uv.x*_Amp); //_Time is time, _Time.x is half speed, and Time.y is real time. Getting a wave and storing it.
o.offsetsine = sin((_Time.y+_Offset)*2*_Speed + v.uv.x*_Amp)*2; += o.sine * (_WaveStrength*v.normal); //How much you effect the Vertex Pos with the Sine wave
o.vertex = UnityObjectToClipPos(v.vertex); //Converting the vertices from local space to world space.
//float3 normalDir = UnityObjectToWorldNormal(v.normal);
o.uv = TRANSFORM_TEX(v.uv, _MainTex); //Defining texture size and offset using the float4
return o; //The end of the function, here is the v2f, goodbye my child :,(
fixed4 frag (v2f i, float facing : VFACE) : COLOR //Affecting the faces that are rendered.
float isFrontFace = (facing >= 0 ? 1 : 0); //Only I know what this does. It's a secret.
float faceSign = (facing >= 0 ? 1 : -1);
// sample the texture
// return i.sine;
fixed4 col = tex2D(_MainTex, i.uv); //Creating the Col variable, Calling texture and UV data
col.rgb *= _MainColor; //Takes and defines the RGB data from the texture, affects the alpha by the multiplier, then applies the colour tint.
col.a *= saturate(col.a*(_Multiplier*i.offsetsine) + col.a);
return col; //Wrap that shit
ENDCG //We done!
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