[UnityShader2]頂點片段著色器例項(三)
阿新 • • 發佈：2019-01-27
原文連結：http://www.cnblogs.com/Esfog/default.html?page=2
1.漫反射
Shader "Esfog/Diffuse" { Properties { _MainTex ("Base (RGB)", 2D) = "white" {} } SubShader { Pass { Tags { "RenderType"="Opaque" "LightMode"="ForwardBase"} CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" uniform sampler2D _MainTex; uniform float4 _LightColor0; struct VertexOutput { float4 pos:SV_POSITION; float2 uv_MainTex:TEXCOORD0; float3 normal:TEXCOORD1; }; VertexOutput vert(appdata_base input) { VertexOutput o; o.pos = mul(UNITY_MATRIX_MVP,input.vertex); o.uv_MainTex = input.texcoord.xy; o.normal = normalize(mul(float4(input.normal,0),_World2Object)); return o; } float4 frag(VertexOutput input):COLOR { float3 normalDir = normalize(input.normal); float3 lightDir = normalize(_WorldSpaceLightPos0.xyz); float3 Kd = tex2D(_MainTex,input.uv_MainTex).xyz; float3 diffuseReflection = Kd * _LightColor0.rgb * max(0,dot(normalDir,lightDir)); return float4(diffuseReflection,1); } ENDCG } } FallBack "Diffuse" }
2.鏡面反射
Shader "Esfog/SpecularReflection" { Properties { _MainTex ("Base (RGB)", 2D) = "white" {} _SpecColor("SpecularColor",Color) = (1,1,1,1) _Shininess("Shininess",Float) = 10 } SubShader { Pass { Tags { "RenderType"="Opaque" "LightMode"="ForwardBase"} CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" #pragma target 5.0 uniform float4 _LightColor0; uniform sampler2D _MainTex; uniform float _Shininess; uniform float4 _SpecColor; struct VertexOutput { float4 pos:SV_POSITION; float4 posWorld:TEXCOORD0; float3 normal:TEXCOORD1; float2 uv:TEXCOORD2; }; VertexOutput vert(appdata_base input) { VertexOutput o; o.pos = mul(UNITY_MATRIX_MVP,input.vertex); o.posWorld = mul(_Object2World,input.vertex); o.normal = normalize(mul(float4(input.normal,0.0),_World2Object).xyz); o.uv = input.texcoord.xy; return o; } float4 frag(VertexOutput input):COLOR { float3 normalDir = normalize(input.normal); float3 viewDir = normalize(float3(_WorldSpaceCameraPos - input.posWorld)); float4 Kd = tex2D(_MainTex,input.uv); float4 Ks = _SpecColor; float4 Ka = Kd; float3 lightDir = normalize(_WorldSpaceLightPos0.xyz); float3 ambientLighting = Ka.rgb * UNITY_LIGHTMODEL_AMBIENT.rgb; float3 diffuseReflection = Kd.rgb * _LightColor0.rgb * max(0.0,dot(normalDir,lightDir)); float facing; if(dot(normalDir,lightDir)<=0) { facing = 0; } else { facing = 1; } float3 SpecularReflection = facing * _LightColor0.rgb * _SpecColor.rgb * pow(max(0,dot(reflect(-lightDir,normalDir),viewDir)),_Shininess); return float4(ambientLighting + diffuseReflection + SpecularReflection,1); } ENDCG } } FallBack "Diffuse" }
3.法線貼圖(環境光+漫反射光+鏡面反射光+法線貼圖)
Shader "Esfog/NormalMap" { Properties { _MainTex ("Base (RGB)", 2D) = "white" {} _NormalMap("NormalMap",2D) = "Bump"{} _SpecColor("SpecularColor",Color) = (1,1,1,1) _Shininess("Shininess",Float) = 10 } SubShader { Pass { Tags { "LightMode"="ForwardBase" } CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" uniform sampler2D _MainTex; uniform sampler2D _NormalMap; uniform float4 _SpecColor; uniform float _Shininess; uniform float4 _LightColor0; struct VertexOutput { float4 pos:SV_POSITION; float2 uv:TEXCOORD0; float3 lightDir:TEXCOORD1; float3 viewDir:TEXCOORD2; }; VertexOutput vert(appdata_tan v) { VertexOutput o; o.pos = mul(UNITY_MATRIX_MVP,v.vertex); o.uv = v.texcoord.xy; //float3 normal = v.normal; //float3 tangent = v.tangent; //float3 binormal= cross(v.normal,v.tangent.xyz) * v.tangent.w; //float3x3 Object2TangentMatrix = float3x3(tangent,binormal,normal); //o.lightDir = mul(Object2TangentMatrix,ObjSpaceLightDir(v.vertex)); //o.viewDir = mul(Object2TangentMatrix,ObjSpaceViewDir(v.vertex)); //上面註釋掉的等價於下面的 //將本地空間的光線方向,觀察方向轉換為切線空間，方便與切線空間的法線進行計算 TANGENT_SPACE_ROTATION; o.lightDir = mul(rotation,ObjSpaceLightDir(v.vertex)); o.viewDir = mul(rotation,ObjSpaceViewDir(v.vertex)); return o; } float4 frag(VertexOutput input):COLOR { float3 lightDir = normalize(input.lightDir); float3 viewDir = normalize(input.viewDir); //float4 encodedNormal = tex2D(_NormalMap,input.uv); //float3 normal = float3(2.0*encodedNormal.ag - 1,0.0); //normal.z = sqrt(1 - dot(normal,normal)); //上面註釋掉的等價於下面的 float3 normal = UnpackNormal(tex2D(_NormalMap, input.uv)); float4 texColor = tex2D(_MainTex,input.uv); float3 ambient = texColor.rgb * UNITY_LIGHTMODEL_AMBIENT.rgb; float3 diffuseReflection = texColor.rgb * _LightColor0.rgb * max(0,dot(normal,lightDir)); float facing; if(dot(normal,lightDir)<0) { facing = 0; } else { facing = 1; } float3 specularRelection = _SpecColor.rgb * _LightColor0.rgb * facing * pow(max(0,dot(reflect(-lightDir,normal),viewDir)),_Shininess); return float4(ambient + diffuseReflection + specularRelection,1); } ENDCG } } FallBack "Diffuse" }
4.幀動畫
Shader "Esfog/SpriteUV"
{
Properties
{
_SpriteTex ("SpriteTexture (RGB)", 2D) = "white" {}
_SpriteRowCount ("RowCounts",float) = 0
_SpriteColumnCount ("ColumnCounts",float) = 0
_Speed ("AnimationSpeed",Range(0.01,10)) = 4
}
SubShader
{
Pass
{
Tags { "RenderType"="Opaque" }
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
uniform sampler2D _SpriteTex;
uniform float _SpriteRowCount;
uniform float _SpriteColumnCount;
uniform float _Speed;
struct VertexOutput
{
float4 pos:SV_POSITION;
float2 uv:TEXCOORD0;
};
VertexOutput vert(appdata_base input)
{
VertexOutput o;
o.pos = mul(UNITY_MATRIX_MVP,input.vertex);
o.uv = input.texcoord.xy;
return o;
}
float4 frag(VertexOutput input):COLOR
{
float perSecondFrame = 1 / _Speed;//每秒幀數
int frameNum = _Time.y / perSecondFrame;//當前幀數
float totalSpriteCount = _SpriteRowCount * _SpriteColumnCount;//總幀數
frameNum = fmod(frameNum,totalSpriteCount);
int rowIndex = frameNum / _SpriteColumnCount;//第幾行
int columnIndex = fmod(frameNum,_SpriteColumnCount);//第幾列
rowIndex = _SpriteRowCount - rowIndex - 1;//因為uv跟播放動畫的順序不一致
float rowAvgPercent = 1 / _SpriteColumnCount;//每行單個sprited的uv比例
float columnAvgPercent = 1 / _SpriteRowCount;//每列單個sprited的uv比例
float2 spriteUV = input.uv;
spriteUV.x = (spriteUV.x + columnIndex) * rowAvgPercent;
spriteUV.y = (spriteUV.y + rowIndex) * columnAvgPercent;
float4 col = tex2D(_SpriteTex,spriteUV);
return col;
}
ENDCG
}
}
FallBack "Diffuse"
}
