builtin_shaders-5.3.4f1学习-Unlit/Texture

// Unlit shader. Simplest possible textured shader.

// - no lighting

// - no lightmap support

// - no per-material color

Shader "Unlit/Texture" {

Properties {

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

}

SubShader {

	Tags { "RenderType"="Opaque" }

	LOD 100

	Pass {

		CGPROGRAM

			#pragma vertex vert

			#pragma fragment frag

			#pragma multi_compile_fog

			#include "UnityCG.cginc"

			struct appdata_t {

				float4 vertex : POSITION;

				float2 texcoord : TEXCOORD0;

			};

			struct v2f {

				float4 vertex : SV_POSITION;

				half2 texcoord : TEXCOORD0;

				UNITY_FOG_COORDS(1)

			};

			sampler2D _MainTex;

			float4 _MainTex_ST;

			v2f vert (appdata_t v)

			{

				v2f o;

				o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);

				o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);

				UNITY_TRANSFER_FOG(o,o.vertex);

				return o;

			}

			fixed4 frag (v2f i) : SV_Target

			{

				fixed4 col = tex2D(_MainTex, i.texcoord);

				UNITY_APPLY_FOG(i.fogCoord, col);

				UNITY_OPAQUE_ALPHA(col.a);

				return col;

			}

		ENDCG

	}

}

}

SV_Target 与Color略有区别，大体相同，有可能是两者的位置前者是中心位置，后者不是，有0.5像素的偏移，这个以后确认下

Fog相关的几个函数

UnityCG.cginc中的解释

// multi_compile_fog Will compile fog variants.

// UNITY_FOG_COORDS(texcoordindex) Declares the fog data interpolator.

// UNITY_TRANSFER_FOG(outputStruct,clipspacePos) Outputs fog data from the vertex shader.

// UNITY_APPLY_FOG(fogData,col) Applies fog to color "col". Automatically applies black fog when in forward-additive pass.

// Can also use UNITY_APPLY_FOG_COLOR to supply your own fog color.

巴特西

builtin_shaders-5.3.4f1学习-Unlit/Texture

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