#error Undefine_SHADERPASS
#endif
//-------------------------------------------------------------------------------------
// Attribute/Varying
//-------------------------------------------------------------------------------------
#define WANT_UV2 (DYNAMICLIGHTMAP_ON) || (SHADERPASS == SHADERPASS_DEBUG_VIEW_MATERIAL) || defined(_REQUIRE_UV2_OR_UV3)
#define WANT_UV3 (SHADERPASS == SHADERPASS_DEBUG_VIEW_MATERIAL) || defined(_REQUIRE_UV2_OR_UV3)
struct Attributes
{
float3 positionOS : POSITION;
float3 normalOS : NORMAL;
float2 uv0 : TEXCOORD0;
float2 uv1 : TEXCOORD1;
#if WANT_UV2
float2 uv2 : TEXCOORD2;
#endif
#if WANT_UV3
float2 uv3 : TEXCOORD3;
#endif
float4 tangentOS : TANGENT; // Always present as we require it also in case of anisotropic lighting
float4 color : COLOR;
// UNITY_INSTANCE_ID
};
#ifdef TESSELLATION_ON
// Copy paste of above struct with POSITION rename to INTERNALTESSPOS (internal of unity shader compiler)
struct AttributesTessellation
{
float3 positionOS : INTERNALTESSPOS;
float3 normalOS : NORMAL;
float2 uv0 : TEXCOORD0;
float2 uv1 : TEXCOORD1;
#if WANT_UV2
float2 uv2 : TEXCOORD2;
#endif
#if WANT_UV3
float2 uv3 : TEXCOORD3;
#endif
float4 tangentOS : TANGENT; // Always present as we require it also in case of anisotropic lighting
float4 color : COLOR;
};
AttributesTessellation AttributesToAttributesTessellation(Attributes input)
{
AttributesTessellation output;
output.positionOS = input.positionOS;
output.normalOS = input.normalOS;
output.uv0 = input.uv0;
output.uv1 = input.uv1;
#if WANT_UV2
output.uv2 = input.uv2;
#endif
#if WANT_UV3
output.uv3 = input.uv3;
#endif
output.tangentOS = input.tangentOS;
output.color = input.color;
return output;
}
Attributes AttributesTessellationToAttributes(AttributesTessellation input)
{
Attributes output;
output.positionOS = input.positionOS;
output.normalOS = input.normalOS;
output.uv0 = input.uv0;
output.uv1 = input.uv1;
#if WANT_UV2
output.uv2 = input.uv2;
#endif
#if WANT_UV3
output.uv3 = input.uv3;
#endif
output.tangentOS = input.tangentOS;
output.color = input.color;
return output;
}
AttributesTessellation InterpolateWithBaryCoords(AttributesTessellation input0, AttributesTessellation input1, AttributesTessellation input2, float3 baryCoords)
{
AttributesTessellation ouput;
TESSELLATION_INTERPOLATE_BARY(positionOS, baryCoords);
TESSELLATION_INTERPOLATE_BARY(normalOS, baryCoords);
TESSELLATION_INTERPOLATE_BARY(uv0, baryCoords);
TESSELLATION_INTERPOLATE_BARY(uv1, baryCoords);
#if WANT_UV2
TESSELLATION_INTERPOLATE_BARY(uv2, baryCoords);
#endif
#if WANT_UV3
TESSELLATION_INTERPOLATE_BARY(uv3, baryCoords);
#endif
TESSELLATION_INTERPOLATE_BARY(tangentOS, baryCoords);
TESSELLATION_INTERPOLATE_BARY(color, baryCoords);
return ouput;
}
#endif // TESSELLATION_ON
struct Varyings
{
float4 positionCS;
float3 positionWS;
float2 texCoord0;
float2 texCoord1;
#if WANT_UV2
float2 texCoord2;
#endif
#if WANT_UV3
float2 texCoord3;
#endif
float3 tangentToWorld[3];
float4 color;
};
struct PackedVaryings
{
float4 positionCS : SV_Position;
#if (WANT_UV2) || (WANT_UV3)
float4 interpolators[6] : TEXCOORD0;
#else
float4 interpolators[5] : TEXCOORD0;
#endif
// Attributes
#define ATTRIBUTES_WANT_NORMAL
#define ATTRIBUTES_WANT_TANGENT // Always present as we require it also in case of anisotropic lighting
#define ATTRIBUTES_WANT_UV0
#define ATTRIBUTES_WANT_UV1
#define ATTRIBUTES_WANT_COLOR
#if SHADER_STAGE_FRAGMENT
#if defined(_DOUBLESIDED_LIGHTING_FLIP) || defined(_DOUBLESIDED_LIGHTING_MIRROR)
FRONT_FACE_TYPE cullFace : FRONT_FACE_SEMATIC;
#endif
#if defined(_REQUIRE_UV2) || defined(_REQUIRE_UV3) || defined(DYNAMICLIGHTMAP_ON) || (SHADERPASS == SHADERPASS_DEBUG_VIEW_MATERIAL)
#define ATTRIBUTES_WANT_UV2
};
// Function to pack data to use as few interpolator as possible, the ShaderGraph should generate these functions
PackedVaryings PackVaryings(Varyings input)
{
PackedVaryings output;
output.positionCS = input.positionCS;
output.interpolators[0].xyz = input.positionWS.xyz;
output.interpolators[1].xyz = input.tangentToWorld[0];
output.interpolators[2].xyz = input.tangentToWorld[1];
output.interpolators[3].xyz = input.tangentToWorld[2];
output.interpolators[0].w = input.texCoord0.x;
output.interpolators[1].w = input.texCoord0.y;
output.interpolators[2].w = input.texCoord1.x;
output.interpolators[3].w = input.texCoord1.y;
output.interpolators[4] = input.color;
#if (WANT_UV2) || (WANT_UV3)
output.interpolators[5] = float4(0.0, 0.0, 0.0, 0.0);
#if WANT_UV2
output.interpolators[5].xy = input.texCoord2.xy;
#if defined(_REQUIRE_UV3) || (SHADERPASS == SHADERPASS_DEBUG_VIEW_MATERIAL)
#define ATTRIBUTES_WANT_UV3
#if WANT_UV3
output.interpolators[5].zw = input.texCoord3.xy;
#define VARYING_WANT_POSITION_WS
#define VARYING_WANT_TANGENT_TO_WORLD
#define VARYING_WANT_TEXCOORD0
#define VARYING_WANT_TEXCOORD1
#ifdef ATTRIBUTES_WANT_UV2
#define VARYING_WANT_TEXCOORD2
#ifdef ATTRIBUTES_WANT_UV3
#define VARYING_WANT_TEXCOORD3
#define VARYING_WANT_COLOR
return output;
}
FragInputs UnpackVaryings(PackedVaryings input)
{
FragInputs output;
ZERO_INITIALIZE(FragInputs, output);
output.unPositionSS = input.positionCS; // input.positionCS is SV_Position
output.positionWS.xyz = input.interpolators[0].xyz;
output.tangentToWorld[0] = input.interpolators[1].xyz;
output.tangentToWorld[1] = input.interpolators[2].xyz;
output.tangentToWorld[2] = input.interpolators[3].xyz;
output.texCoord0.xy = float2(input.interpolators[0].w, input.interpolators[1].w);
output.texCoord1.xy = float2(input.interpolators[2].w, input.interpolators[3].w);
output.vertexColor = input.interpolators[4];
#if WANT_UV2
output.texCoord2 = input.interpolators[5].xy;
#endif
#if WANT_UV3
output.texCoord3 = input.interpolators[5].zw;
#if defined(_DOUBLESIDED_LIGHTING_FLIP) || defined(_DOUBLESIDED_LIGHTING_MIRROR)
#define VARYING_WANT_CULLFACE
#if SHADER_STAGE_FRAGMENT
#if defined(_DOUBLESIDED_LIGHTING_FLIP) || defined(_DOUBLESIDED_LIGHTING_MIRROR)
output.isFrontFace = IS_FRONT_VFACE(input.cullFace, true, false);
#endif
#endif
return output;
}
//-------------------------------------------------------------------------------------
// Vertex shader
//-------------------------------------------------------------------------------------
// TODO: Here we will also have all the vertex deformation (GPU skinning, vertex animation, morph target...) or we will need to generate a compute shaders instead (better! but require work to deal with unpacking like fp16)
PackedVaryings Vert(Attributes input)
{
Varyings output;
output.positionWS = TransformObjectToWorld(input.positionOS);
// TODO deal with camera center rendering and instancing (This is the reason why we always perform tow steps transform to clip space + instancing matrix)
output.positionCS = TransformWorldToHClip(output.positionWS);
float3 normalWS = TransformObjectToWorldNormal(input.normalOS);
// Varying DS - Use for domain shader, are deduced from the above
output.texCoord0 = input.uv0;
output.texCoord1 = input.uv1;
#if WANT_UV2
output.texCoord2 = input.uv2;
#endif
// Include structure declaration and packing functions
#include "LitAttributesVarying.hlsl"
#if WANT_UV3
output.texCoord3 = input.uv3;
#endif
float4 tangentWS = float4(TransformObjectToWorldDir(input.tangentOS.xyz), input.tangentOS.w);
float3x3 tangentToWorld = CreateTangentToWorld(normalWS, tangentWS.xyz, tangentWS.w);
output.tangentToWorld[0] = tangentToWorld[0];
output.tangentToWorld[1] = tangentToWorld[1];
output.tangentToWorld[2] = tangentToWorld[2];
output.color = input.color;
return PackVaryings(output);
}
#include "LitVertexShare.hlsl"
Sebastien Lagarde
8 年前