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Fix automatic collision importing from mode to remove unused material slots

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#3475
This commit is contained in:
Wojtek Figat
2025-06-03 12:48:31 +02:00
parent 2fd9b4a62a
commit 6fece4ca38
1 changed files with 34 additions and 0 deletions
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34
Source/Engine/Tools/ModelTool/ModelTool.cpp
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@@ -1931,9 +1931,43 @@ bool ModelTool::ImportModel(const String& path, ModelData& data, Options& option
auto mesh = lod.Meshes[i];
if (mesh->Name.StartsWith(options.CollisionMeshesPrefix, StringSearchCase::IgnoreCase))
{
// Remove material slot used by this mesh (if no other mesh else uses it)
int32 materialSlotUsageCount = 0;
for (const auto& e : data.LODs)
{
for (const MeshData* q : e.Meshes)
{
if (q->MaterialSlotIndex == mesh->MaterialSlotIndex)
materialSlotUsageCount++;
}
}
if (materialSlotUsageCount == 1)
{
data.Materials.RemoveAt(mesh->MaterialSlotIndex);
// Fixup linkage of other meshes to materials
for (auto& e : data.LODs)
{
for (MeshData* q : e.Meshes)
{
if (q->MaterialSlotIndex > mesh->MaterialSlotIndex)
{
q->MaterialSlotIndex--;
}
}
}
}
// Remove data linkage
mesh->NodeIndex = 0;
mesh->MaterialSlotIndex = 0;
// Add mesh to collision
if (collisionModel.LODs.Count() == 0)
collisionModel.LODs.AddOne();
collisionModel.LODs[0].Meshes.Add(mesh);
// Remove mesh from model
lod.Meshes.RemoveAtKeepOrder(i);
if (lod.Meshes.IsEmpty())
break;