Fixed pipeline shader (Pass channel must be written in SubShader)

Shader instruction sequence diagram

Rander Setup

Properties

Properties	Float	_FloatValue("a floating point number", float) = 0.4
	Range float (Range)	_RangeValue("A range float",Range(1,100)) = 50
	Four-dimensional (Vector)	_VectorValue("A four-dimensional number",Vector) = (1,1,1,1)
	Color	_ColorValue("a color value",Color) = (1,0,0,1)
	Level 2 Textures (2D)	_Texture2D("A 2nd order texture",2D) = ""{}
	Non-level 2 texture (Rect)	_TextureRect("A non-level 2 texture",Rect) = ""{}
	Cubemap (Cube)	_TextureCube("A cube map",Cube) = ""{}

Color

Fixed rendering a color() : Color(0,0,0.6,1)

Fixed rendering a variable color[] : Color[_MainColor]

Material

premise	Vertex lighting needs to be turned on → Lighting On/Off
Material	Diffuse color (Diffuse)
	Ambient Reflection Color (Ambient)
	Prerequisite: Specular reflection needs to be turned on ( SeparateSpecular On \| Off) Shininess
	Specular color
	Emission color (Emission)

Set up polygon culling

Cull Back/Front/Off

Depth test (judging the depth of the model, rendering the model when satisfied)

Prerequisite: Need to write to the depth buffer

ZWrite On \| Off	On (if it is turned on, if the judgment is satisfied, only the model frame will be rendered and the color will not be rendered)
	Off (if it is turned off, the model can be rendered and the color can be rendered if the judgment is satisfied)

Ztest

Ztest	Less (less than), LEqual (less than or equal to)
	Greater (greater than), GLqual (greater than or equal to)
	Equal (equal), NotEqual (not equal)
	Always (Renders all pixels. This is functionally equivalent to AlphaTest Off .)
	Never (don't render any pixels)

        Pass
		{
			//  进行深度测试,当前像素的深度大于缓存里的深度
			//  说明当前像素在缓存像素的后面
			//  通俗来讲就是被挡住了
			ZTest Greater
			//  关闭深度缓存
			ZWrite Off

			//  被挡住渲染该颜色
			Color(1,0,0,1)
		}

		Pass
		{
			//  进行深度测试,当前像素的深度小于或等于缓存里的深度
			//  说明当前像素不在缓存像素的后面
			//  通俗来讲就是没有被挡住了
			ZTest LEqual
			
			//  没被挡住渲染该颜色
			Color(0,0,1,1)
		}

What is depth?

Distance of vertices & pixels from the camera	The closer the distance, the smaller the depth
	The farther the distance the greater the depth

Blend

Blend	Alpha (Blending): Blend SrcAlpha OneMinusSrcAlpha
	Adding up: Blend One One
	Softer addition: Blend One OneMinusDstColor
	Multiplication: Blend DstColor Zero
	2x Multiplication: Blend DstColor SrcColor
	开启透明混合：Blend SrcAlpha OneMinusSrcAlpha

SubShader标签Queue

测试需要关闭ZTest

级别	1000	Background 后台
	2000	Geometry 几何体（默认）
	3000	Transparent 透明
	4000	Overlay 覆盖

Tags{"Queue" = "Transparent+1"}

TextureSetup

SetTexture[TexturePropertyName]{TextureBlock}

前提	Lighting On
stc【颜色源】	Primary是来自光照计算的颜色或是它绑定时的顶点颜色
	Texture是在SetTexture中被定义的纹理的颜色
	Previous是上一次Set Texture的结果
	Constant是被ConstantColor定义的颜色	固定颜色:constantColor(1,1,1,1)

combine	暗：combine src1 * src2 亮：combine src1 + src2 combine src1 - src2
	combine src1 lerp(src2) src3
	双倍/四倍————Double \ Quad
	RGB与A分离

Unity Shader (fixed pipeline shader)