void AHair::UpdateSegment(AHairSegment* InSegment)
{
if (!InSegment || InSegment->Spline->GetNumberOfSplinePoints() < 2) return;
InSegment->ProceduralMesh->ClearAllMeshSections();
ClearMeshData(InSegment);
// Update node rotations to match spline
for (int i = 0; i < InSegment->Spline->GetNumberOfSplinePoints(); i++)
{
FRotator Rot = InSegment->Spline->GetRotationAtSplinePoint(i, ESplineCoordinateSpace::World);
InSegment->Nodes[i]->SetActorRotation(Rot);
}
// Populate new data
if (!MiddleMeshData) return;
for (int i = 0; i <= InSegment->NumSegments; i++)
{
float TotalDistance = InSegment->Spline->GetSplineLength();
float Distance = (TotalDistance / InSegment->NumSegments)*i;
float NextDistance = (TotalDistance / InSegment->NumSegments)*i+1;
AssignPositions(InSegment->Spline->GetLocationAtDistanceAlongSpline(Distance, ESplineCoordinateSpace::Local),
InSegment->Spline->GetLocationAtDistanceAlongSpline(NextDistance, ESplineCoordinateSpace::Local));
//Weight = 1.0f - Distance / TotalDistance;
float Displacement = InSegment->FallOff - 1.0f;
Weight = 1.0f + (Distance / TotalDistance)*Displacement;
// Interpolate distance to closest spline point index
float Delta = ((InSegment->Spline->GetNumberOfSplinePoints() - 1)*1.0f) / (InSegment->NumSegments*1.0f);
int Index = FGenericPlatformMath::RoundToInt(i*Delta);
if (i == 0)
{
AddVertices(0, MiddleMeshData->Vertices, InSegment, Distance);
AddTriangles(InSegment);
AddUVs(InSegment, true);
}
else
{
AddVertices(2, MiddleMeshData->Vertices, InSegment, Distance);
AddTriangles(InSegment);
AddUVs(InSegment, false);
}
}
// Create mesh
InSegment->ProceduralMesh->CreateMeshSection(0, InSegment->ProceduralMeshData->Vertices,
InSegment->ProceduralMeshData->Triangles,
TArray<FVector>(),
InSegment->ProceduralMeshData->UVs,
TArray<FColor>(), TArray<FProcMeshTangent>(), true);
// Duplicate for outline as custom depth not available for translucent materials
InSegment->OutlineMesh->CreateMeshSection(0, InSegment->ProceduralMeshData->Vertices,
InSegment->ProceduralMeshData->Triangles,
TArray<FVector>(),
InSegment->ProceduralMeshData->UVs,
TArray<FColor>(), TArray<FProcMeshTangent>(), true);
}
void TriangleTesselationCache::AddQuads(const carray<Vec3f>& pos, const carray<Vec3f>& normal, const carray<Vec2f>& uv, const carray<Vec4i>& quads) {
// check if they have normals
if(!normal.empty()) {
AddTriangles(pos, normal, uv, ElementOperations::QuadsToTriangles(quads));
} else {
carray<Vec4i> newQuads;
ElementOperations::UnshareForFaceNormals(pos,
(!uv.empty())?uv:carray<Vec2f>(pos.size(),Vec2f(0,0)),
ElementOperations::QuadNormals(pos, quads),
quads,
this->pos, this->normal, this->uv, newQuads);
this->triangles = ElementOperations::QuadsToTriangles(newQuads);
}
_UpdateBBox();
}
void Collision::Triangles(D3Dmodel* model, XMMATRIX world)
{
AddTriangles(model->ModelAsTriangles(world));
}
void Mesh::AddData(const Mesh& mesh, const ezTransform& transform)
{
ezMat4 transformMat = transform.GetAsMat4();
ezMat4 normalTransformMat = transformMat.GetInverse(0.0f).GetTranspose();
// Create new triangles.
ezUInt32 oldTriangleCount = GetNumTriangles();
AddTriangles(mesh.GetNumTriangles());
ezArrayPtr<const Mesh::Triangle> sourceTriangles = mesh.GetTriangles();
ezArrayPtr<const Mesh::Triangle> targetTriangles = GetTriangles().GetSubArray(oldTriangleCount);
EZ_ASSERT_DEBUG(sourceTriangles.GetCount() == targetTriangles.GetCount(), "Something is wrong with triangle allocation!");
for (auto it = mesh.m_VertexDataStreams.GetIterator(); it.IsValid(); ++it)
{
const VertexDataStream* sourceStream = it.Value();
VertexDataStream* targetStream = AddDataStream(static_cast<ezGALVertexAttributeSemantic::Enum>(it.Key()),
sourceStream->GetNumElementsPerVertex(), sourceStream->GetElementType());
if (!targetStream)
{
ezLog::SeriousWarning("Cannot merge mesh {0} properly since it has a vertex data stream with semantic {1} that uses {2} elements "
"instead of 'unkown' which is used by the merge target. Skipping this data stream.",
mesh.m_Name, it.Key(), sourceStream->GetNumElementsPerVertex());
continue;
}
// Copy data.
ezUInt32 targetBaseDataIndex = targetStream->m_Data.GetCount();
targetStream->m_Data.PushBackRange(sourceStream->m_Data);
// Transform data.
if (!transform.IsIdentical(ezTransform::IdentityTransform()))
{
const ezUInt32 attributeSize = targetStream->GetAttributeSize();
// Positions
if (it.Key() == ezGALVertexAttributeSemantic::Position)
{
for (ezUInt32 i = targetBaseDataIndex; i < targetStream->m_Data.GetCount(); i += attributeSize)
{
ezVec3& pos = *reinterpret_cast<ezVec3*>(&targetStream->m_Data[i]);
pos = transformMat.TransformPosition(pos);
}
}
// Directions
else if (it.Key() == ezGALVertexAttributeSemantic::Normal || it.Key() == ezGALVertexAttributeSemantic::Tangent ||
it.Key() == ezGALVertexAttributeSemantic::BiTangent)
{
for (ezUInt32 i = targetBaseDataIndex; i < targetStream->m_Data.GetCount(); i += attributeSize)
{
ezVec3& dir = *reinterpret_cast<ezVec3*>(&targetStream->m_Data[i]);
dir = normalTransformMat.TransformDirection(dir);
}
}
}
// Set mapping
for (ezUInt32 tri = 0; tri < sourceTriangles.GetCount(); ++tri)
{
for (int v = 0; v < 3; ++v)
{
VertexDataIndex sourceDataIndex = sourceStream->GetDataIndex(sourceTriangles[tri].m_Vertices[v]);
if (sourceDataIndex.IsValid())
targetStream->SetDataIndex(targetTriangles[tri].m_Vertices[v], targetBaseDataIndex + sourceDataIndex.GetValue());
}
}
}
// Add submeshes.
ezUInt32 oldSubMeshCount = m_SubMeshes.GetCount();
m_SubMeshes.PushBackRange(mesh.m_SubMeshes);
for (ezUInt32 i = oldSubMeshCount; i < m_SubMeshes.GetCount(); ++i)
{
m_SubMeshes[i].m_uiFirstTriangle += oldTriangleCount;
}
// Add skeleton if existent
// TODO: What if multiple, incompatible skeletons are found(?)
// For now: Remove skeleton and import unskinned
// if (mesh.m_pSkeleton)
//{
// if (m_pSkeleton)
// {
// if (!m_pSkeleton->IsCompatibleWith(mesh.m_pSkeleton.Borrow()))
// {
// ezLog::Warning("Found incompatible skeletons during mesh merging in mesh '{0}', import will be without skeletons!",
// m_Name.GetData()); m_pSkeleton.Reset();
// }
// }
// else
// {
// m_pSkeleton = EZ_DEFAULT_NEW(ezSkeleton, *mesh.m_pSkeleton);
// }
//}
}
