Hydrogent: enabled objects without texture coordinates

DiligentGraphics · Sep 15, 2023 · 221792c · 221792c
1 parent 225e7d5
commit 221792c
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Showing 3 changed files with 17 additions and 2 deletions.
diff --git a/Hydrogent/src/HnMaterial.cpp b/Hydrogent/src/HnMaterial.cpp
@@ -109,7 +109,7 @@ void HnMaterial::Sync(pxr::HdSceneDelegate* SceneDelegate,
         };
 
         SetFallbackValue(HnTokens->diffuseColor, [this](const pxr::VtValue& Val) {
-            m_ShaderAttribs.BaseColorFactor.MakeVector(Val.Get<pxr::GfVec4f>().data());
+            m_ShaderAttribs.BaseColorFactor = float4{float3::MakeVector(Val.Get<pxr::GfVec3f>().data()), 1};
         });
         SetFallbackValue(HnTokens->metallic, [this](const pxr::VtValue& Val) {
             m_ShaderAttribs.MetallicFactor = Val.Get<float>();

diff --git a/Hydrogent/src/HnMaterialNetwork.cpp b/Hydrogent/src/HnMaterialNetwork.cpp
@@ -579,7 +579,7 @@ HnSubTextureIdentifier GetSubtextureIdentifier(const pxr::TfToken&       ParamNa
     }
     else if (SourceColorSpace == "auto")
     {
-        TextureId.IsSRGB = ParamName == HnTokens->diffuseColor;
+        //TextureId.IsSRGB = ParamName == HnTokens->diffuseColor;
     }
 
     if (TextureType == pxr::HdTextureType::Uv)

diff --git a/Hydrogent/src/HnMesh.cpp b/Hydrogent/src/HnMesh.cpp
@@ -31,6 +31,7 @@
 #include "DebugUtilities.hpp"
 #include "GraphicsTypesX.hpp"
 
+#include "pxr/base/gf/vec2f.h"
 #include "pxr/imaging/hd/meshUtil.h"
 #include "pxr/imaging/hd/vtBufferSource.h"
 
@@ -226,6 +227,20 @@ void HnMesh::UpdateVertexPrims(pxr::HdSceneDelegate& SceneDelegate,
         m_BufferSources.emplace(PrimDesc.name, std::move(BufferSource));
     }
 
+    // Create dummy texture coordinates if they are not present
+    if (m_BufferSources.find(HnTokens->st0) == m_BufferSources.end())
+    {
+        pxr::VtValue DummyUVs;
+        DummyUVs          = pxr::VtArray<pxr::GfVec2f>{static_cast<size_t>(NumPoints), pxr::GfVec2f{0}};
+        auto BufferSource = std::make_shared<pxr::HdVtBufferSource>(
+            HnTokens->st0,
+            DummyUVs,
+            1,    // values per element
+            false // whether doubles are supported or must be converted to floats
+        );
+        m_BufferSources.emplace(HnTokens->st0, std::move(BufferSource));
+    }
+
     DirtyBits &= ~pxr::HdChangeTracker::DirtyPrimvar;
 }