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33 行
971 B
33 行
971 B
#ifndef LIGHTWEIGHT_PASS_SHADOW_INCLUDED
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#define LIGHTWEIGHT_PASS_SHADOW_INCLUDED
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#include "LWRP/ShaderLibrary/LightweightPassLit.hlsl"
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// x: global clip space bias, y: normal world space bias
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float4 _ShadowBias;
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float3 _LightDirection;
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LightweightVertexOutput ShadowPassVertex(LightweightVertexInput v)
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{
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LightweightVertexOutput o = LitPassVertex(v);
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float invNdotL = 1.0 - saturate(dot(_LightDirection, o.normal));
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float scale = invNdotL * _ShadowBias.y;
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// normal bias is negative since we want to apply an inset normal offset
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o.posWS = o.normal * scale.xxx + o.posWS;
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float4 clipPos = TransformWorldToHClip(o.posWS);
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// _ShadowBias.x sign depens on if platform has reversed z buffer
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clipPos.z += _ShadowBias.x;
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#if UNITY_REVERSED_Z
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clipPos.z = min(clipPos.z, clipPos.w * UNITY_NEAR_CLIP_VALUE);
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#else
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clipPos.z = max(clipPos.z, clipPos.w * UNITY_NEAR_CLIP_VALUE);
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#endif
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o.clipPos = clipPos;
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return o;
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}
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#endif
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