51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
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#include "ModelsStreamingHandler.h"
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#include "Engine/Content/Assets/Model.h"
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StreamingQuality ModelsStreamingHandler::CalculateTargetQuality(StreamableResource* resource, DateTime now)
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{
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ASSERT(resource);
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// TODO: calculate a proper quality levels for models based on render time and streaming enable/disable options
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return MAX_STREAMING_QUALITY;
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}
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int32 ModelsStreamingHandler::CalculateResidency(StreamableResource* resource, StreamingQuality quality)
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{
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ASSERT(resource);
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auto& model = *(Model*)resource;
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auto lodCount = model.GetLODsCount();
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if (quality < ZeroTolerance)
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return 0;
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int32 lods = Math::CeilToInt(quality * (StreamingQuality)lodCount);
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ASSERT(model.IsValidLODIndex(lods - 1));
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return lods;
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}
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int32 ModelsStreamingHandler::CalculateRequestedResidency(StreamableResource* resource, int32 targetResidency)
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{
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ASSERT(resource);
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auto& model = *(Model*)resource;
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// Always load only single LOD at once
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int32 residency = targetResidency;
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int32 currentResidency = model.GetCurrentResidency();
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if (currentResidency < targetResidency)
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{
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// Up
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residency = currentResidency + 1;
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}
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else if (currentResidency > targetResidency)
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{
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// Down
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residency = currentResidency - 1;
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}
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return residency;
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}
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