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标题: 车身、玻璃材质shader [打印本页]

作者: 会飞的鱼 时间: 2012-2-24 14:17
标题: 车身、玻璃材质shader
Shader "Reflective/Glass" {

Properties {

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

      _SpecColor ("Specular Color", Color) = (0.5, 0.5, 0.5, 1)

      _Shininess ("Shininess", Range (0.01, 1)) = 0.078125

      _ReflectColor ("Reflect Strength", Color) = (1,1,1,0.5)

      _MainTex ("Base (RGB) Gloss (A)", 2D) = "white" {}

      _Parallax ("Height", Range (0.005, 0.08)) = 0.02

      _Cube ("Reflection Cubemap", Cube) = "_Skybox" { TexGen CubeReflect }

}

SubShader

{

      LOD 300

      Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}

      Blend one OneMinusDstColor

      ZWrite Off



      // First pass does reflection cubemap

      Pass

      {

         Name "BASE"

         Tags {"LightMode" = "Always"}

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#pragma fragmentoption ARB_fog_exp2

#pragma fragmentoption ARB_precision_hint_fastest

#include "UnityCG.cginc"



struct v2f {

V2F_POS_FOG;

float2 uv : TEXCOORD0;

float3 I : TEXCOORD1;

};



uniform float4 _MainTex_ST;



v2f vert(appdata_tan v)

{

v2f o;

PositionFog( v.vertex, o.pos, o.fog );

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



// calculate object space reflection vector

float3 viewDir = ObjSpaceViewDir( v.vertex );

float3 I = reflect( -viewDir, v.normal );



// transform to world space reflection vector

o.I = mul( (float3x3)_Object2World, I );



return o;

}



uniform sampler2D _MainTex;

uniform samplerCUBE _Cube;

uniform float4 _ReflectColor;



half4 frag (v2f i) : COLOR

{

half4 texcol = tex2D (_MainTex, i.uv);

half4 reflcol = texCUBE( _Cube, i.I );

reflcol *= texcol.a;

return reflcol * _ReflectColor;

}

ENDCG

      }



      UsePass "

arallax Specular/PPL"



}

FallBack "Reflective/VertexLit", 1

}

Shader "Reflective/Glass" {

Properties {

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

      _SpecColor ("Specular Color", Color) = (0.5, 0.5, 0.5, 1)

      _Shininess ("Shininess", Range (0.01, 1)) = 0.078125

      _ReflectColor ("Reflect Strength", Color) = (1,1,1,0.5)

      _MainTex ("Base (RGB) Gloss (A)", 2D) = "white" {}

      _Parallax ("Height", Range (0.005, 0.08)) = 0.02

      _Cube ("Reflection Cubemap", Cube) = "_Skybox" { TexGen CubeReflect }

}

SubShader

{

      LOD 300

      Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}

      Blend one OneMinusDstColor

      ZWrite Off



      // First pass does reflection cubemap

      Pass

      {

         Name "BASE"

         Tags {"LightMode" = "Always"}

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#pragma fragmentoption ARB_fog_exp2

#pragma fragmentoption ARB_precision_hint_fastest

#include "UnityCG.cginc"
struct v2f {

V2F_POS_FOG;

float2 uv : TEXCOORD0;

float3 I : TEXCOORD1;

};
uniform float4 _MainTex_ST;
v2f vert(appdata_tan v)

{

v2f o;

PositionFog( v.vertex, o.pos, o.fog );

o.uv = TRANSFORM_TEX(v.texcoord,_MainTex);
// calculate object space reflection vector

float3 viewDir = ObjSpaceViewDir( v.vertex );

float3 I = reflect( -viewDir, v.normal );

// transform to world space reflection vector

o.I = mul( (float3x3)_Object2World, I );

return o;

}
uniform sampler2D _MainTex;

uniform samplerCUBE _Cube;

uniform float4 _ReflectColor;
half4 frag (v2f i) : COLOR

{

half4 texcol = tex2D (_MainTex, i.uv);

half4 reflcol = texCUBE( _Cube, i.I );

reflcol *= texcol.a;

return reflcol * _ReflectColor;

}

ENDCG

      }
      UsePass "

arallax Specular/PPL"
}

FallBack "Reflective/VertexLit", 1

}
车身shader用Reflective/Specular中的一种
然后加入以下脚本：
RenderToCubemap.js:
// Attach this script to an object that uses a Reflective shader.

// Realtime reflective cubemaps!

@script ExecuteInEditMode



var cubemapSize = 128;

var oneFacePerFrame = false;

private var cam : Camera;

private var rtex : RenderTexture;



function Start ()

{

// render all six faces at startup

UpdateCubemap( 63 );

}



function LateUpdate ()

{

if (oneFacePerFrame)

{

      var faceToRender = Time.frameCount % 6;

      var faceMask = 1 << faceToRender;

      UpdateCubemap (faceMask);

}

else

{

      UpdateCubemap (63); // all six faces

}

}



function UpdateCubemap (faceMask : int)

{

if (!cam)

{

      var go = new GameObject ("CubemapCamera", Camera);

      go.hideFlags = HideFlags.HideAndDontSave;

      go.transform.position = transform.position;

      go.transform.rotation = Quaternion.identity;

      cam = go.camera;

      cam.farClipPlane = 100; // don't render very far into cubemap

      cam.enabled = false;

}



if (!rtex)

{

      rtex = new RenderTexture (cubemapSize, cubemapSize, 16);

      rtex.isPowerOfTwo = true;

      rtex.isCubemap = true;

      rtex.hideFlags = HideFlags.HideAndDontSave;

      renderer.sharedMaterial.SetTexture ("_Cube", rtex);

}



cam.transform.position = transform.position;

cam.RenderToCubemap (rtex, faceMask);

}



function OnDisable ()

{

DestroyImmediate (cam);

DestroyImmediate (rtex);

}

转自unity3d8.com

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