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| Shader "RitoURP/VertexFragmentStartPoint"
{
Properties
{
_MainTex ("Main Map", 2D) = "white" {}
_BumpMap ("Normal Map", 2D) = "bump" {}
}
SubShader
{
Tags
{
"RenderPipeline"="UniversalPipeline"
"RenderType"="Opaque"
}
Pass
{
HLSLPROGRAM
#pragma prefer_hlslcc gles
#pragma exclude_renderers d3d11_9x
#pragma vertex vert
#pragma fragment frag
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
// GPU Instancing
#pragma multi_compile_instancing
#pragma multi_compile_fog
// Receiving Shadow Options
#pragma multi_compile _ _MAIN_LIGHT_SHADOWS
#pragma multi_compile _ _MAIN_LIGHT_SHADOWS_CASCADE
#pragma multi_compile _ _SHADOWS_SOFT
// Transformations : CG -> HLSL Compatability
#define UnityObjectToClipPos(x) TransformObjectToHClip(x)
#define UnityObjectToWorldDir(x) TransformObjectToWorldDir(x)
#define UnityObjectToWorldNormal(x) TransformObjectToWorldNormal(x)
#define UnityWorldToViewPos(x) TransformWorldToView(x)
#define UnityWorldToObjectDir(x) TransformWorldToObjectDir(x)
#define UnityWorldSpaceViewDir(x) _WorldSpaceCameraPos.xyz - x
struct appdata
{
float4 vertex : POSITION; // Object Position
float3 normal : NORMAL; // Object Normal
float4 tangent : TANGENT;
float2 uv : TEXCOORD0;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
struct v2f
{
float4 vertex : SV_POSITION; // Clip Position
float2 uv : TEXCOORD0;
float3 wPos : TEXCOORD1;
float3 wNormal : TEXCOORD2;
// Tangent -> World 회전 변환을 위한 3x3 매트릭스
float3 tspace0 : TEXCOORD3; // tangent.x, bitangent.x, normal.x
float3 tspace1 : TEXCOORD4; // tangent.y, bitangent.y, normal.y
float3 tspace2 : TEXCOORD5; // tangent.z, bitangent.z, normal.z
float4 shadowCoord : TEXCOORD6;
float fogCoord : TEXCOORD7;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
/*****************************************************************
* VARIABLES
******************************************************************/
CBUFFER_START(UnityPerMaterial)
TEXTURE2D(_MainTex);
SAMPLER(sampler_MainTex);
float4 _MainTex_ST;
TEXTURE2D(_BumpMap);
SAMPLER(sampler_BumpMap);
CBUFFER_END
/*****************************************************************
* VERTEX
******************************************************************/
v2f vert (appdata v)
{
v2f o;
UNITY_SETUP_INSTANCE_ID(v);
UNITY_TRANSFER_INSTANCE_ID(v, o);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
float3 wNormal = UnityObjectToWorldNormal(v.normal);
float3 wTangent = UnityObjectToWorldDir(v.tangent.xyz);
// Calculate Bitangent
float tangentSign = v.tangent.w * unity_WorldTransformParams.w;
float3 wBitangent = cross(wNormal, wTangent) * tangentSign;
// Tangent To World 행렬
o.tspace0 = float3(wTangent.x, wBitangent.x, wNormal.x);
o.tspace1 = float3(wTangent.y, wBitangent.y, wNormal.y);
o.tspace2 = float3(wTangent.z, wBitangent.z, wNormal.z);
o.vertex = UnityObjectToClipPos(v.vertex.xyz);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
o.wPos = TransformObjectToWorld(v.vertex.xyz);
//o.wPos = mul(unity_ObjectToWorld, v.vertex).xyz;
o.wNormal = wNormal;
// Shadow
VertexPositionInputs vertexInput = GetVertexPositionInputs(v.vertex.xyz);
o.shadowCoord = GetShadowCoord(vertexInput);
// Fog
o.fogCoord = ComputeFogFactor(o.vertex.z);
return o;
}
/*****************************************************************
* FRAGMENT
******************************************************************/
// fixed4 대신 half4
half4 frag (v2f i) : SV_Target
{
UNITY_SETUP_INSTANCE_ID(i);
UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
float3 col = 1.;
float alpha = 1.;
Light mainLight = GetMainLight(i.shadowCoord);
// World Vectors
float3 wPos = i.wPos;
float3 wNormal = normalize(i.wNormal);
float3 wView = normalize(UnityWorldSpaceViewDir(wPos));
float3 wLight = normalize(_MainLightPosition.xyz);
float3 wHalf = normalize(wLight + wView);
float3 wLReflect = reflect(-wLight, wNormal);
// Calculate World Normal From Normal Map
float4 normalMapCol = SAMPLE_TEXTURE2D(_BumpMap, sampler_BumpMap, i.uv);
float3 tNormal0 = UnpackNormal(normalMapCol);
float3 wNormal0;
wNormal0.x = dot(i.tspace0, tNormal0);
wNormal0.y = dot(i.tspace1, tNormal0);
wNormal0.z = dot(i.tspace2, tNormal0);
wNormal = wNormal0;
// Lighting Term
float ndl = dot(wNormal, wLight);
float ndv = dot(wNormal, wView);
float ndh = dot(wNormal, wHalf);
float rdv = dot(wLReflect, wView);
float diffuse = saturate(ndl);
float specPhong = pow(saturate(rdv), 30.) * .4;
float specBlinnPhong = pow(saturate(ndh), 80.) * .8;
float fresnel = pow(1. - saturate(ndv), 3.) * .5;
half3 ambient = SampleSH(wNormal);
// Final Color
//col = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.uv);
float light = saturate(diffuse + specBlinnPhong);
col *= light * _MainLightColor.rgb * mainLight.shadowAttenuation * mainLight.distanceAttenuation;
col += fresnel;
col += ambient;
col = MixFog(col.rgb, i.fogCoord);
return half4(col, alpha);
}
ENDHLSL
}
}
}
|
