71 lines
1.5 KiB
Plaintext
71 lines
1.5 KiB
Plaintext
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Shader "Simple2" {
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Properties
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{
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_Diffuse("Diffuse", Color) = (1,1,1,1)
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_Cutoff("Alpha Cutoff", Range(0, 1)) = 0.5
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}
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SubShader
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{
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Blend SrcAlpha OneMinusSrcAlpha
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ZWrite Off
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Pass
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{
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//指明光照模式为前向渲染模式
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Tags{ "LightMode" = "ForwardBase" }
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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//确保光照衰减等光照变量可以被正确赋值
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#pragma multi_compile_fwdbase
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//包含引用的内置文件
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#include "Lighting.cginc"
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#include "AutoLight.cginc"
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fixed4 _Diffuse;
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fixed _Cutoff;
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//定义输入与输出的结构体
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struct a2v
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{
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float4 vertex : POSITION;
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};
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struct v2f
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{
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float4 pos : SV_POSITION;
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//添加内置宏，声明一个用于阴影纹理采样的坐标，参数是下一个可用的插值寄存器的索引值
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SHADOW_COORDS(0)
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};
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//在顶点着色器中，计算世界坐标下的法线方向和顶点坐标，并传递给片元着色器
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v2f vert(a2v v)
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{
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v2f o;
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//转换顶点坐标到裁剪空间
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o.pos = UnityObjectToClipPos(v.vertex);
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//添加另一个内置宏，用于在顶点着色器中计算上一步中声明的阴影纹理坐标
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TRANSFER_SHADOW(o);
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return o;
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}
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fixed4 frag(v2f i) : SV_Target
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{
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//平行光的衰减值为1
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fixed atten = 0.6;
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//使用内置宏计算阴影值
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fixed shadow = SHADOW_ATTENUATION(i);
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clip(1 - shadow - _Cutoff);
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return fixed4(_Diffuse.rgb * atten * shadow, _Diffuse.a);
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}
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ENDCG
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}
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}
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//Fallback"Specular"
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}
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