Unity 2Dレンダラで3Dオブジェクトをライティングする
qiita.com
ノーマルマップがないモデルだといい感じにライティングされなかったからこれ多分モデルにノーマルマップがあるときの事例だと思う(未検証)
頂点のノーマルだけで事足りる場合もあるのでちょっと改変した
〜 shader "Universal Render Pipeline/2D/Sprite-Lit-3D" { Properties { [MainTexture] _MainTex("Diffuse", 2D) = "white" {} [MainColor] _BaseColor("Color", Color) = (1,1,1,1) [HDR] _EmissionColor("Emission", Color) = (0,0,0,0) _MaskTex("Mask", 2D) = "white" {} _NormalMap("Normal Map", 2D) = "bump" {} // Legacy properties. They're here so that materials using this shader can gracefully fallback to the legacy sprite shader. [HideInInspector] _Color("Tint", Color) = (1,1,1,1) [HideInInspector] _RendererColor("RendererColor", Color) = (1,1,1,1) [HideInInspector] _Flip("Flip", Vector) = (1,1,1,1) [HideInInspector] _AlphaTex("External Alpha", 2D) = "white" {} [HideInInspector] _EnableExternalAlpha("Enable External Alpha", Float) = 0 } HLSLINCLUDE #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl" ENDHLSL SubShader { Tags {"Queue" = "Geometry" "RenderType" = "Opacue" "RenderPipeline" = "UniversalPipeline" } Blend SrcAlpha OneMinusSrcAlpha Cull Back ZWrite On Pass { Tags { "LightMode" = "Universal2D" } HLSLPROGRAM #pragma prefer_hlslcc gles #pragma vertex CombinedShapeLightVertex #pragma fragment CombinedShapeLightFragment #pragma multi_compile USE_SHAPE_LIGHT_TYPE_0 __ #pragma multi_compile USE_SHAPE_LIGHT_TYPE_1 __ #pragma multi_compile USE_SHAPE_LIGHT_TYPE_2 __ #pragma multi_compile USE_SHAPE_LIGHT_TYPE_3 __ struct Attributes { float3 positionOS : POSITION; float4 color : COLOR; float2 uv : TEXCOORD0; }; struct Varyings { float4 positionCS : SV_POSITION; float4 color : COLOR; float2 uv : TEXCOORD0; float2 lightingUV : TEXCOORD1; }; #include "Packages/com.unity.render-pipelines.universal/Shaders/2D/Include/LightingUtility.hlsl" TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex); TEXTURE2D(_MaskTex); SAMPLER(sampler_MaskTex); TEXTURE2D(_NormalMap); SAMPLER(sampler_NormalMap); half4 _MainTex_ST; half4 _NormalMap_ST; half4 _BaseColor; half4 _EmissionColor; #if USE_SHAPE_LIGHT_TYPE_0 SHAPE_LIGHT(0) #endif #if USE_SHAPE_LIGHT_TYPE_1 SHAPE_LIGHT(1) #endif #if USE_SHAPE_LIGHT_TYPE_2 SHAPE_LIGHT(2) #endif #if USE_SHAPE_LIGHT_TYPE_3 SHAPE_LIGHT(3) #endif Varyings CombinedShapeLightVertex(Attributes v) { Varyings o = (Varyings)0; o.positionCS = TransformObjectToHClip(v.positionOS); o.uv = TRANSFORM_TEX(v.uv, _MainTex); float4 clipVertex = o.positionCS / o.positionCS.w; o.lightingUV = ComputeScreenPos(clipVertex).xy; o.color = v.color * _BaseColor; return o; } #include "Packages/com.unity.render-pipelines.universal/Shaders/2D/Include/CombinedShapeLightShared.hlsl" half4 CombinedShapeLightFragment(Varyings i) : SV_Target { half4 main = i.color * SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.uv); half4 mask = SAMPLE_TEXTURE2D(_MaskTex, sampler_MaskTex, i.uv); return CombinedShapeLightShared(main, mask, i.lightingUV)+main*_EmissionColor; } ENDHLSL } Pass { Tags { "LightMode" = "NormalsRendering"} HLSLPROGRAM #pragma prefer_hlslcc gles #pragma vertex NormalsRenderingVertex #pragma fragment NormalsRenderingFragment struct Attributes { float3 positionOS : POSITION; float3 normalOS : NORMAL;//ここで頂点の法線を取得 float4 color : COLOR; float2 uv : TEXCOORD0; float4 tangent : TANGENT; }; struct Varyings { float4 positionCS : SV_POSITION; float4 color : COLOR; float2 uv : TEXCOORD0; float3 normalWS : TEXCOORD1; float3 tangentWS : TEXCOORD2; float3 bitangentWS : TEXCOORD3; }; TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex); TEXTURE2D(_NormalMap); SAMPLER(sampler_NormalMap); float4 _NormalMap_ST; // Is this the right way to do this? Varyings NormalsRenderingVertex(Attributes attributes) { Varyings o = (Varyings)0; o.positionCS = TransformObjectToHClip(attributes.positionOS); o.uv = TRANSFORM_TEX(attributes.uv, _NormalMap); o.uv = attributes.uv; o.color = attributes.color; o.normalWS = TransformObjectToWorldDir(attributes.normalOS); o.tangentWS = TransformObjectToWorldDir(attributes.tangent.xyz); o.bitangentWS = cross(o.normalWS, o.tangentWS) * attributes.tangent.w; return o; } #include "Packages/com.unity.render-pipelines.universal/Shaders/2D/Include/NormalsRenderingShared.hlsl" float4 NormalsRenderingFragment(Varyings i) : SV_Target { float4 mainTex = i.color * SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.uv); float3 normalTS = UnpackNormal(SAMPLE_TEXTURE2D(_NormalMap, sampler_NormalMap, i.uv)); //return NormalsRenderingShared(mainTex, normalTS, i.tangentWS.xyz, i.bitangentWS.xyz, i.normalWS.xyz); half3 normalVS = TransformWorldToViewDir(i.normalWS.xyz);//頂点の法線情報をそのまま使う half4 normalColor; normalColor.rgb = 0.5 * ((normalVS)+1); normalColor.a = i.color.a; // used for blending return normalColor; } ENDHLSL } Pass { Tags { "LightMode" = "UniversalForward" "Queue"="Geometry" "RenderType"="Opacue"} HLSLPROGRAM #pragma prefer_hlslcc gles #pragma vertex UnlitVertex #pragma fragment UnlitFragment struct Attributes { float3 positionOS : POSITION; float4 color : COLOR; float2 uv : TEXCOORD0; }; struct Varyings { float4 positionCS : SV_POSITION; float4 color : COLOR; float2 uv : TEXCOORD0; }; TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex); float4 _MainTex_ST; Varyings UnlitVertex(Attributes attributes) { Varyings o = (Varyings)0; o.positionCS = TransformObjectToHClip(attributes.positionOS); o.uv = TRANSFORM_TEX(attributes.uv, _MainTex); o.uv = attributes.uv; o.color = attributes.color; return o; } float4 UnlitFragment(Varyings i) : SV_Target { float4 mainTex = i.color * SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.uv); return mainTex; } ENDHLSL } } FallBack "Universal Render Pipeline/Unlit" } 〜
Tags { "LightMode" = "NormalsRendering"}
のPassで
頂点シェーダで法線情報をもらって
NormalsRenderingFragmentでそのままつかっただけ
白いCubeは3dモデルだけど松明のLight2D(PointLight)の光を受けている
