Data Transfer: Avoid unnecessarily computing existing normals
If the mix factor means the old values won't be used at all, the existing corner normals from before the modifier don't matter and we can skip computing them.
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@ -1060,7 +1060,9 @@ static bool data_transfer_layersmapping_generate(ListBase *r_map,
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dst_data = static_cast<float3 *>(CustomData_add_layer(
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&me_dst->corner_data, CD_NORMAL, CD_SET_DEFAULT, me_dst->corners_num));
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}
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if (mix_factor != 1.0f) {
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MutableSpan(dst_data, me_dst->corners_num).copy_from(me_dst->corner_normals());
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}
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/* Post-process will convert it back to CD_CUSTOMLOOPNORMAL. */
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data_transfer_layersmapping_add_item_cd(r_map,
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CD_NORMAL,
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