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标题: 玻璃和车身材质 [打印本页]

作者: 烟雨 时间: 2014-10-31 23:24
标题: 玻璃和车身材质

透明玻璃材质和镜面反射材质都是需要光影技术（Shader）配合的，属于特效材质。

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"="***e" "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"

s***ct 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 "Parallax 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"="***e" "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"

s***ct 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 "Parallax 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 = ***e;

      rtex.isCubemap = ***e;

      rtex.hideFlags = HideFlags.HideAndDontSave;

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

}

cam.transform.position = transform.position;

cam.RenderToCubemap (rtex, faceMask);

}

function OnDisable ()

{

DestroyImmediate (cam);

DestroyImmediate (rtex);

}

作者: tianhett 时间: 2014-11-1 14:17
Thanks For Sharing！！！

作者: hyui 时间: 2014-11-3 03:51
Goood code !!!!

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