ue4.26 为staticmesh每级lod制定材质球

视频：

materialForEachLod - 知乎 (zhihu.com)

 

 EditorStaticMeshLibarary.h

?

1 2 3 4

UFUNCTION(BlueprintCallable, Category = "MY")         static void recreateSectionInfoMap(UStaticMesh* StaticMesh); UFUNCTION(BlueprintCallable, Category = "MY")         static void createUVChannelDataForStaticMeshMaterial(UPARAM(ref)FStaticMaterial& staticMeshMaterial);

EditorStaticMeshLibarary.cpp

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

void UEditorStaticMeshLibrary::createUVChannelDataForStaticMeshMaterial(UPARAM(ref)FStaticMaterial&staticMeshMaterial) {     staticMeshMaterial.UVChannelData= FMeshUVChannelInfo(1.f); } void UEditorStaticMeshLibrary::recreateSectionInfoMap_MY(UStaticMesh* StaticMesh) {     const int32 lodCount = StaticMesh->GetNumLODs();     //重建SectionInfoMap     {     //  StaticMesh->GetSectionInfoMap().Clear();         int32 materialIndex = 0;         for (int32 LODIdx = 0; LODIdx < lodCount; LODIdx++) {             int sectionNum=StaticMesh->GetSectionInfoMap().GetSectionNumber(LODIdx);             for (int i = 0; i < sectionNum; i++) {                 FMeshSectionInfo info = StaticMesh->GetSectionInfoMap().Get(LODIdx,i);//FMeshSectionInfo();                 info.MaterialIndex = materialIndex;                 StaticMesh->GetSectionInfoMap().Set(LODIdx, i, info);                 materialIndex++;             }         }     }     StaticMesh->PostEditChange();     StaticMesh->MarkPackageDirty(); }

　　注：staticMaterial结构体有三个成员变量MaterialInterface、MaterialSlotName、UVChannelData，但MakeStaticMaterial节点只有MaterialInterface和MaterialSlotName两个输入，我试着如果不初始化UVChannelData，在后续StaticMaterialList设给StaticMaterials时会触发断点，所以另加了一个createUVChannelDataForStaticMeshMaterial函数。