Unity3D 自定义光照模型实现

// Use BlinnPhong

Shader "U1/Obj/U1ObjNoAmbient" {

Properties{

_Color("Diffuse Material Color", Color) = (1,1,1,1)

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

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

_BumpMap("Normalmap", 2D) = "bump" {}

// 材料镜面光泽度

_EmissionMap("Emission", 2D) = "black" {}

}

SubShader{

Pass{

Tags{ "LightMode" = "ForwardBase" }

// pass for ambient light and first light source

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#include "UnityCG.cginc"

uniform float4 _LightColor0;

// color of light source (from "Lighting.cginc")

// User-specified properties

uniform float4 _Color;

uniform float4 _SpecColor;

sampler2D _MainTex;

sampler2D _BumpMap;

sampler2D _EmissionMap;

struct vertexInput {

float4 vertex : POSITION;

float2 uv : TEXCOORD0;

//float3 normal : NORMAL;

};

struct vertexOutput {

float4 pos : SV_POSITION;

float2 uv : TEXCOORD0;

float3 lightDir : TEXCOORD1;//未规范化的

float3 viewDir : TEXCOORD2;

};

vertexOutput vert(vertexInput input)