水shader效果.docx

Shader FX/Water Properties _WaveScale (Wave scale, Range (0.02,0.15) = 0.063_ReflDistort (Reflection distort, Range (0,1.5) = 0.44_RefrDistort (Refraction distort, Range (0,1.5) = 0.40_RefrColor (Refraction color, COLOR) = ( .34, .85, .92, 1)_Fresnel (Fresnel (A) , 2D) = gray _BumpMap (Bumpmap (RGB) , 2D) = bump WaveSpeed (Wave speed (map1 x,y; map2 x,y), Vector) = (19,9,-16,-7)_ReflectiveColor (Reflective color (RGB) fresnel (A) , 2D) = _ReflectiveColorCube (Reflective color cube (RGB) fresnel (A), Cube) = TexGen CubeReflect _HorizonColor (Simple water horizon color, COLOR) = ( .172, .463, .435, 1)_MainTex (Fallback texture, 2D) = _ReflectionTex (Internal Reflection, 2D) = _RefractionTex (Internal Refraction, 2D) = / -/ Fragment program cardsSubshader Tags WaterMode=Refractive RenderType=Opaque Pass CGPROGRAM#pragma vertex vert#pragma fragment frag#pragma fragmentoption ARB_precision_hint_fastest#pragma fragmentoption ARB_fog_exp2#pragma multi_compile WATER_REFRACTIVE WATER_REFLECTIVE WATER_SIMPLE#if defined WATER_REFLECTIVE | defined WATER_REFRACTIVE#define HAS_REFLECTION 1#endif#if defined WATER_REFRACTIVE#define HAS_REFRACTION 1#endif#include UnityCG.cgincuniform float4 _WaveScale4;uniform float4 _WaveOffset;#ifdef HAS_REFLECTIONuniform float _ReflDistort;#endif#ifdef HAS_REFRACTIONuniform float _RefrDistort;#endifstruct appdata float4 vertex : POSITION;float3 normal : NORMAL;struct v2f V2F_POS_FOG;#if defined HAS_REFLECTION | defined HAS_REFRACTIONfloat3 ref;#endiffloat2 bumpuv2;float3 viewDir;v2f vert(appdata v)v2f o;PositionFog( v.vertex, o.pos, o.fog );/ scroll bump wavesfloat4 temp;temp.xyzw = v.vertex.xzxz * _WaveScale4 + _WaveOffset;o.bumpuv0 = temp.xy;o.bumpuv1 = temp.wz;/ object space view direction (will normalize per pixel)o.viewDir.xzy = ObjSpaceViewDir(v.vertex);#if defined HAS_REFLECTION | defined HAS_REFRACTION/ calculate the reflection vectorfloat3x4 mat = float3x4 (0.5, 0, 0, 0.5,0, 0.5 * _ProjectionParams.x, 0, 0.5,0, 0, 0, 1);o.ref = mul (mat, o.pos);#endifreturn o;#if defined WATER_REFLECTIVE | defined WATER_REFRACTIVEsampler2D _ReflectionTex;#endif#if defined WATER_REFLECTIVE | defined WATER_SIMPLEsampler2D _ReflectiveColor;#endif#if defined WATER_REFRACTIVEsampler2D _Fresnel;sampler2D _RefractionTex;uniform float4 _RefrColor;#endif#if defined WATER_SIMPLEuniform float4 _HorizonColor;#endifsampler2D _BumpMap;half4 frag( v2f i ) : COLORi.viewDir = normalize(i.viewDir);/ combine two scrolling bumpmaps into onehalf3 bump1 = tex2D( _BumpMap, i.bumpuv0 ).rgb;half3 bump2 = tex2D( _BumpMap, i.bumpuv1 ).rgb;half3 bump = bump1 + bump2 - 1;/ fresnel factorhalf fresnelFac = dot( i.viewDir, bump );/ perturb reflection/refraction UVs by bumpmap, and lookup colors#ifdef HAS_REFLECTIONfloat3 uv1 = i.ref; uv1.xy += bump * _ReflDistort;half4 refl = tex2Dproj( _ReflectionTex, uv1 );#endif#ifdef HAS_REFRACTIONfloat3 uv2 = i.ref; uv2.xy -= bump * _RefrDistort;half4 refr = tex2Dproj( _RefractionTex, uv2 ) * _RefrColor;#endif/ final color is between refracted and reflected based on fresnelhalf4 color;#ifdef WATER_REFRACTIVEhalf fresnel = tex2D( _Fresnel, float2(fresnelFac,fresnelFac) ).a;color = lerp( refr, refl, fresnel );#endif#ifdef WATER_REFLECTIVEhalf4 water = tex2D( _ReflectiveColor, float2(fresnelFac,fresnelFac) );color.rgb = lerp( water.rgb, refl.rgb, water.a );color.a = refl.a * water.a;#endif#ifdef WATER_SIMPLEhalf4 water = tex2D( _ReflectiveColor, float2(fresnelFac,fresnelFac) );color.rgb = lerp( water.rgb, _HorizonColor.rgb, water.a );color.a = _HorizonColor.a;#endifreturn color;ENDCG/ -/ Radeon 9000 cardsSubshader Tags WaterMode=Reflective RenderType=Opaque Pass CGPROGRAM#pragma vertex vert#include UnityCG.cgincuniform float4 _WaveScale4;uniform float4 _WaveOffset;uniform float _ReflDistort;struct appdata float4 vertex : POSITION;float3 normal : NORMAL;struct v2f V2F_POS_FOG;float2 bumpuv2 : TEXCOORD0;float3 viewDir : TEXCOORD2;float4 ref : TEXCOORD3;v2f vert(appdata v)v2f o;PositionFog( v.vertex, o.pos, o.fog );/ scroll bump wavesfloat4 temp;temp.xyzw = v.vertex.xzxz * _WaveScale4 + _WaveOffset;o.bumpuv0 = temp.xy;o.bumpuv1 = temp.wz;/ object space view directiono.viewDir.xzy = normalize( ObjSpaceViewDir(v.vertex) );/ calculate the reflection vectorfloat4x4 mat = float4x4 (.5, 0, 0,.5,0,.5 * _ProjectionParams.x, 0,.5,0, 0,.5,.5,0, 0, 0, 1);o.ref = mul (mat, o.pos);return o; /Unity3D教程手册：ENDCGProgram SubProgram Keywords WATER_REFLECTIVE WATER_REFRACTIVE SetTexture _BumpMap 2D SetTexture _BumpMap 2D SetTexture _ReflectiveColor 2D SetTexture _ReflectionTex 2D Local 0, (_ReflDistort,0,0,0)!ATIfs1.0StartConstants;CONSTANT c0 = program.local0;EndConstants;StartPrelimPass;PassTexCoord r3, t3.stq_dq; # reflection vectorSampleMap r0, t0.str; # bump1SampleMap r1, t1.str; # bump2PassTexCoord r2, t2.str;ADD r1.half, r0.bias, r1.bias; # bump = bump1 + bump2 - 1DOT3 r2, r1.2x, r2; # fresnel: dot (bump, viewer-pos)# add less offset because its purely screenspace; big ones look badMAD r3.rg, r1, c0.r, r3; # uv += bump * strength; add less because its not perspectiveEndPass;StartOutputPass;SampleMap r3, r3.str; # reflection colorSampleMap r2, r2.str; # water color/fresnelLERP r0.rgb, r2.a, r3, r2; # between water and reflected based on fresnelMUL r0.a, r3.a, r2.a;EndPass;SubProgram Keywords WATER_SIMPLE SetTexture _BumpMap 2D SetTexture _BumpMap 2D SetTexture _ReflectiveColor 2D Local 0, _HorizonColor!ATIfs1.0StartConstants;CONSTANT c0 = program.local0;EndConstants;StartPrelimPass;SampleMap r0, t0.str;SampleMap r1, t1.str;PassTexCoord r2, t2.str;ADD r1, r0.bias, r1.bias; # bump = bump1 + bump2 - 1DOT3 r2, r1, r2; # fresnel: dot (bump, viewer-pos)EndPass;StartOutputPass;SampleMap r2, r2.str;LERP r0.rgb, r2.a, c0, r2; # fade in reflectionMOV r0.a, c0.a;EndPass;/ -/ Old cards/ three texture, cubemapsSubshader Tags WaterMode=Simple RenderType=Opaque Pass Color (0.5,0.5,0.5