128 lines
4.8 KiB
HLSL
128 lines
4.8 KiB
HLSL
#if (SHADERPASS == SHADERPASS_SHADOWCASTER)
|
|
// Shadow Casting Light geometric parameters. These variables are used when applying the shadow Normal Bias and are set by UnityEngine.Rendering.Universal.ShadowUtils.SetupShadowCasterConstantBuffer in com.unity.render-pipelines.universal/Runtime/ShadowUtils.cs
|
|
// For Directional lights, _LightDirection is used when applying shadow Normal Bias.
|
|
// For Spot lights and Point lights, _LightPosition is used to compute the actual light direction because it is different at each shadow caster geometry vertex.
|
|
float3 _LightDirection;
|
|
float3 _LightPosition;
|
|
#endif
|
|
|
|
Varyings BuildVaryings(Attributes input)
|
|
{
|
|
Varyings output = (Varyings)0;
|
|
|
|
UNITY_SETUP_INSTANCE_ID(input);
|
|
UNITY_TRANSFER_INSTANCE_ID(input, output);
|
|
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
|
|
|
|
#if defined(FEATURES_GRAPH_VERTEX)
|
|
// Evaluate Vertex Graph
|
|
VertexDescriptionInputs vertexDescriptionInputs = BuildVertexDescriptionInputs(input);
|
|
VertexDescription vertexDescription = VertexDescriptionFunction(vertexDescriptionInputs);
|
|
|
|
// Assign modified vertex attributes
|
|
input.positionOS = vertexDescription.Position;
|
|
#if defined(VARYINGS_NEED_NORMAL_WS)
|
|
input.normalOS = vertexDescription.Normal;
|
|
#endif //FEATURES_GRAPH_NORMAL
|
|
#if defined(VARYINGS_NEED_TANGENT_WS)
|
|
input.tangentOS.xyz = vertexDescription.Tangent.xyz;
|
|
#endif //FEATURES GRAPH TANGENT
|
|
#endif //FEATURES_GRAPH_VERTEX
|
|
|
|
// TODO: Avoid path via VertexPositionInputs (Universal)
|
|
VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
|
|
|
|
// Returns the camera relative position (if enabled)
|
|
float3 positionWS = TransformObjectToWorld(input.positionOS);
|
|
|
|
#ifdef ATTRIBUTES_NEED_NORMAL
|
|
float3 normalWS = TransformObjectToWorldNormal(input.normalOS);
|
|
#else
|
|
// Required to compile ApplyVertexModification that doesn't use normal.
|
|
float3 normalWS = float3(0.0, 0.0, 0.0);
|
|
#endif
|
|
|
|
#ifdef ATTRIBUTES_NEED_TANGENT
|
|
float4 tangentWS = float4(TransformObjectToWorldDir(input.tangentOS.xyz), input.tangentOS.w);
|
|
#endif
|
|
|
|
// TODO: Change to inline ifdef
|
|
// Do vertex modification in camera relative space (if enabled)
|
|
#if defined(HAVE_VERTEX_MODIFICATION)
|
|
ApplyVertexModification(input, normalWS, positionWS, _TimeParameters.xyz);
|
|
#endif
|
|
|
|
#ifdef VARYINGS_NEED_POSITION_WS
|
|
output.positionWS = positionWS;
|
|
#endif
|
|
|
|
#ifdef VARYINGS_NEED_NORMAL_WS
|
|
output.normalWS = normalWS; // normalized in TransformObjectToWorldNormal()
|
|
#endif
|
|
|
|
#ifdef VARYINGS_NEED_TANGENT_WS
|
|
output.tangentWS = tangentWS; // normalized in TransformObjectToWorldDir()
|
|
#endif
|
|
|
|
#if (SHADERPASS == SHADERPASS_SHADOWCASTER)
|
|
// Define shadow pass specific clip position for Universal
|
|
#if _CASTING_PUNCTUAL_LIGHT_SHADOW
|
|
float3 lightDirectionWS = normalize(_LightPosition - positionWS);
|
|
#else
|
|
float3 lightDirectionWS = _LightDirection;
|
|
#endif
|
|
output.positionCS = TransformWorldToHClip(ApplyShadowBias(positionWS, normalWS, lightDirectionWS));
|
|
#if UNITY_REVERSED_Z
|
|
output.positionCS.z = min(output.positionCS.z, UNITY_NEAR_CLIP_VALUE);
|
|
#else
|
|
output.positionCS.z = max(output.positionCS.z, UNITY_NEAR_CLIP_VALUE);
|
|
#endif
|
|
#elif (SHADERPASS == SHADERPASS_META)
|
|
output.positionCS = MetaVertexPosition(float4(input.positionOS, 0), input.uv1, input.uv2, unity_LightmapST, unity_DynamicLightmapST);
|
|
#else
|
|
output.positionCS = TransformWorldToHClip(positionWS);
|
|
#endif
|
|
|
|
#if defined(VARYINGS_NEED_TEXCOORD0) || defined(VARYINGS_DS_NEED_TEXCOORD0)
|
|
output.texCoord0 = input.uv0;
|
|
#endif
|
|
#if defined(VARYINGS_NEED_TEXCOORD1) || defined(VARYINGS_DS_NEED_TEXCOORD1)
|
|
output.texCoord1 = input.uv1;
|
|
#endif
|
|
#if defined(VARYINGS_NEED_TEXCOORD2) || defined(VARYINGS_DS_NEED_TEXCOORD2)
|
|
output.texCoord2 = input.uv2;
|
|
#endif
|
|
#if defined(VARYINGS_NEED_TEXCOORD3) || defined(VARYINGS_DS_NEED_TEXCOORD3)
|
|
output.texCoord3 = input.uv3;
|
|
#endif
|
|
|
|
#if defined(VARYINGS_NEED_COLOR) || defined(VARYINGS_DS_NEED_COLOR)
|
|
output.color = input.color;
|
|
#endif
|
|
|
|
#ifdef VARYINGS_NEED_VIEWDIRECTION_WS
|
|
output.viewDirectionWS = GetWorldSpaceViewDir(positionWS);
|
|
#endif
|
|
|
|
#ifdef VARYINGS_NEED_SCREENPOSITION
|
|
output.screenPosition = vertexInput.positionNDC;
|
|
#endif
|
|
|
|
#if (SHADERPASS == SHADERPASS_FORWARD) || (SHADERPASS == SHADERPASS_GBUFFER)
|
|
OUTPUT_LIGHTMAP_UV(input.uv1, unity_LightmapST, output.lightmapUV);
|
|
OUTPUT_SH(normalWS, output.sh);
|
|
#endif
|
|
|
|
#ifdef VARYINGS_NEED_FOG_AND_VERTEX_LIGHT
|
|
half3 vertexLight = VertexLighting(positionWS, normalWS);
|
|
half fogFactor = ComputeFogFactor(output.positionCS.z);
|
|
output.fogFactorAndVertexLight = half4(fogFactor, vertexLight);
|
|
#endif
|
|
|
|
#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)
|
|
output.shadowCoord = GetShadowCoord(vertexInput);
|
|
#endif
|
|
|
|
return output;
|
|
}
|