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[ue4] Generated normals are now correctly being flipped at back-faces. Closes #1830.

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This commit is contained in:
Harald Csaszar 2021-01-14 20:42:43 +01:00
parent a088270186
commit 9032040503
1 changed files with 12 additions and 1 deletions
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13
spine-ue4/Plugins/SpinePlugin/Source/SpinePlugin/Private/SpineSkeletonRendererComponent.cpp
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@ -332,14 +332,25 @@ void USpineSkeletonRendererComponent::UpdateMesh(Skeleton* Skeleton) {
colors.Add(FColor(r, g, b, a));
darkColors.Add(FVector(dr, dg, db));
vertices.Add(FVector(verticesPtr[j], depthOffset, verticesPtr[j + 1]));
normals.Add(FVector(0, -1, 0));
uvs.Add(FVector2D(attachmentUvs[j], attachmentUvs[j + 1]));
}
int firstIndex = indices.Num();
for (int j = 0; j < numIndices; j++) {
indices.Add(idx + attachmentIndices[j]);
}
FVector normal = FVector(0, -1, 0);
if (numVertices > 2 &&
FVector::CrossProduct(
vertices[indices[firstIndex + 2]] - vertices[indices[firstIndex]],
vertices[indices[firstIndex + 1]] - vertices[indices[firstIndex]]).Y > 0.f) {
normal.Y = 1;
}
for (int j = 0; j < numVertices; j++) {
normals.Add(normal);
}
idx += numVertices;
depthOffset += this->DepthOffset;