一些shader 代码

外发光shader

Shader "Faye/OutLightting"

{

Properties

{

_MainTex("Texture (RGB)", 2D) = "black" {}

_Color("Color", Color) = (0, 0, 0, 1)

_AtmoColor("Atmosphere Color", Color) = (0.5, 0.5, 1.0, 1)

_Size("Size", Float) = 0.1

_Falloff("Falloff", Float) = 5

_FalloffPlanet("Falloff Planet", Float) = 5

_Transparency("Transparency", Float) = 15

_TransparencyPlanet("Transparency Planet", Float) = 1

}

SubShader

{

Pass

{

Name "PlanetBase"

Tags {"LightMode" = "Always"}

Cull Back

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#pragma fragmentoption ARB_fog_exp2

#pragma fragmentoption ARB_precision_hint_fastest

#include "UnityCG.cginc"

uniform sampler2D _MainTex;

uniform float4 _MainTex_ST;

uniform float4 _Color;

uniform float4 _AtmoColor;

uniform float _FalloffPlanet;

uniform float _TransparencyPlanet;

struct v2f

{

float4 pos : SV_POSITION;

float3 normal : TEXCOORD0;

float3 worldvertpos : TEXCOORD1;

float2 texcoord : TEXCOORD2;

};

v2f vert(appdata_base v)

{

v2f o;

o.pos = mul (UNITY_MATRIX_MVP, v.vertex);

o.normal = v.normal;

o.worldvertpos = mul(_Object2World, v.vertex).xyz;

o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);

return o;

}

float4 frag(v2f i) : COLOR

{

i.normal = normalize(i.normal);

float3 viewdir = normalize(_WorldSpaceCameraPos-i.worldvertpos);

float4 atmo = _AtmoColor;

atmo.a = pow(1.0-saturate(dot(viewdir, i.normal)), _FalloffPlanet);

atmo.a *= _TransparencyPlanet*_Color;

float4 color = tex2D(_MainTex, i.texcoord)*_Color;

color.rgb = lerp(color.rgb, atmo.rgb, atmo.a);

return color*dot(normalize(i.worldvertpos-_WorldSpaceLightPos0), i.normal);

}

ENDCG

}

Pass

{

Name "AtmosphereBase"

Tags {"LightMode" = "Always"}

Cull Front

Blend SrcAlpha One

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#pragma fragmentoption ARB_fog_exp2

#pragma fragmentoption ARB_precision_hint_fastest

#include "UnityCG.cginc"

uniform float4 _Color;

uniform float4 _AtmoColor;

uniform float _Size;

uniform float _Falloff;

uniform float _Transparency;

struct v2f

{

float4 pos : SV_POSITION;

float3 normal : TEXCOORD0;

float3 worldvertpos : TEXCOORD1;

};

v2f vert(appdata_base v)

{

v2f o;

v.vertex.xyz += v.normal*_Size;

o.pos = mul (UNITY_MATRIX_MVP, v.vertex);

o.normal = v.normal;

o.worldvertpos = mul(_Object2World, v.vertex);

return o;

}

float4 frag(v2f i) : COLOR

{

i.normal = normalize(i.normal);

float3 viewdir = normalize(i.worldvertpos-_WorldSpaceCameraPos);

float4 color = _AtmoColor;

color.a = pow(saturate(dot(viewdir, i.normal)), _Falloff);

color.a *= _Transparency*_Color*dot(normalize(i.worldvertpos-_WorldSpaceLightPos0), i.normal);

return color;

}

ENDCG

}

}

FallBack "Diffuse"

}