shadow-functions.shader

void vertShadowCaster (VertexInput v,
	#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
	out VertexOutputShadowCaster o,
	#endif
	out float4 opos : SV_POSITION)
{
#if PLANE_CLIPPING_ENABLED
	float4 posWorld = mul(_Object2World, v.vertex);
	o.posWorld = posWorld.xyz;
#endif
	TRANSFER_SHADOW_CASTER_NOPOS(o,opos)
	#if defined(UNITY_STANDARD_USE_SHADOW_UVS)
		o.tex = TRANSFORM_TEX(v.uv0, _MainTex);
	#endif
}


half4 fragShadowCaster (
	#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
	VertexOutputShadowCaster i
	#endif
	#ifdef UNITY_STANDARD_USE_DITHER_MASK
	, UNITY_VPOS_TYPE vpos : VPOS
	#endif
	) : SV_Target
{
	PLANE_CLIP(i.posWorld)

	#if defined(UNITY_STANDARD_USE_SHADOW_UVS)
		half alpha = tex2D(_MainTex, i.tex).a * _Color.a;
		#if defined(_ALPHATEST_ON)
			clip (alpha - _Cutoff);
		#endif
		#if defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)
			#if defined(UNITY_STANDARD_USE_DITHER_MASK)
				// Use dither mask for alpha blended shadows, based on pixel position xy
				// and alpha level. Our dither texture is 4x4x16.
				half alphaRef = tex3D(_DitherMaskLOD, float3(vpos.xy*0.25,alpha*0.9375)).a;
				clip (alphaRef - 0.01);
			#else
				clip (alpha - _Cutoff);
			#endif
		#endif
	#endif // #if defined(UNITY_STANDARD_USE_SHADOW_UVS)

	SHADOW_CASTER_FRAGMENT(i)
}