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Add support for up to 4 texture channels when importing meshes

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#2667
This commit is contained in:
Wojtek Figat
2025-01-11 22:40:20 +01:00
parent 756ba0a533
commit a1c46d2e6e
31 changed files with 427 additions and 475 deletions
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65
Source/Engine/Tools/ModelTool/ModelTool.AutodeskFbxSdk.cpp
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@@ -386,10 +386,12 @@ bool ProcessMesh(ImporterData& data, FbxMesh* fbxMesh, MeshData& mesh, String& e
}
// Texture coordinates
FbxGeometryElementUV* texcoords = fbxMesh->GetElementUV(0);
if (texcoords)
for (int32 channelIndex = 0; channelIndex < MODEL_MAX_UV && fbxMesh->GetElementUV(channelIndex); channelIndex++)
{
ReadLayerData(fbxMesh, *texcoords, mesh.UVs);
FbxGeometryElementUV* texcoords = fbxMesh->GetElementUV(0);
mesh.UVs.Resize(channelIndex + 1);
auto& channel = mesh.UVs[channelIndex];
ReadLayerData(fbxMesh, *texcoords, channel);
}
// Normals
@@ -405,53 +407,7 @@ bool ProcessMesh(ImporterData& data, FbxMesh* fbxMesh, MeshData& mesh, String& e
}
// Lightmap UVs
if (data.Options.LightmapUVsSource == ModelLightmapUVsSource::Disable)
{
// No lightmap UVs
}
else if (data.Options.LightmapUVsSource == ModelLightmapUVsSource::Generate)
{
// Generate lightmap UVs
if (mesh.GenerateLightmapUVs())
{
// TODO: we could propagate this message to Debug Console in editor? or create interface to gather some msgs from importing service
LOG(Warning, "Failed to generate lightmap uvs");
}
}
else
{
// Select input channel index
int32 inputChannelIndex;
switch (data.Options.LightmapUVsSource)
{
case ModelLightmapUVsSource::Channel0:
inputChannelIndex = 0;
break;
case ModelLightmapUVsSource::Channel1:
inputChannelIndex = 1;
break;
case ModelLightmapUVsSource::Channel2:
inputChannelIndex = 2;
break;
case ModelLightmapUVsSource::Channel3:
inputChannelIndex = 3;
break;
default:
inputChannelIndex = INVALID_INDEX;
break;
}
// Check if has that channel texcoords
if (inputChannelIndex >= 0 && inputChannelIndex < fbxMesh->GetElementUVCount() && fbxMesh->GetElementUV(inputChannelIndex))
{
ReadLayerData(fbxMesh, *fbxMesh->GetElementUV(inputChannelIndex), mesh.LightmapUVs);
}
else
{
// TODO: we could propagate this message to Debug Console in editor? or create interface to gather some msgs from importing service
LOG(Warning, "Cannot import model lightmap uvs. Missing texcoords channel {0}.", inputChannelIndex);
}
}
mesh.SetLightmapUVsSource(data.Options.LightmapUVsSource);
// Vertex Colors
if (data.Options.ImportVertexColors && fbxMesh->GetElementVertexColorCount() > 0)
@@ -609,10 +565,11 @@ bool ProcessMesh(ImporterData& data, FbxMesh* fbxMesh, MeshData& mesh, String& e
}
// Flip the Y in texcoords
for (int32 i = 0; i < mesh.UVs.Count(); i++)
mesh.UVs[i].Y = 1.0f - mesh.UVs[i].Y;
for (int32 i = 0; i < mesh.LightmapUVs.Count(); i++)
mesh.LightmapUVs[i].Y = 1.0f - mesh.LightmapUVs[i].Y;
for (auto& channel : mesh.UVs)
{
for (int32 i = 0; i < channel.Count(); i++)
channel[i].Y = 1.0f - channel[i].Y;
}
// Handle missing material case (could never happen but it's better to be sure it will work)
if (mesh.MaterialSlotIndex == -1)