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124 lines
5.5 KiB
C++
124 lines
5.5 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#pragma once
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#include <AzCore/std/containers/fixed_vector.h>
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#include <AzCore/Math/Vector3.h>
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#include <AzCore/std/algorithm.h>
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#include <AzCore/std/smart_ptr/make_shared.h>
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#include <AzCore/std/parallel/shared_mutex.h>
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#include <AzCore/std/containers/map.h>
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#include <AzCore/Math/Color.h>
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#include <AzCore/Math/Aabb.h>
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#include <AzCore/Component/TickBus.h>
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#include <AzCore/Jobs/JobManagerBus.h>
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#include <AzCore/Jobs/JobFunction.h>
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#include <AzFramework/Terrain/TerrainDataRequestBus.h>
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#include <TerrainSystem/TerrainSystemBus.h>
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namespace Terrain
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{
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struct TerrainLayerPriorityComparator
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{
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bool operator()(const AZ::EntityId& layer1id, const AZ::EntityId& layer2id) const;
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};
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class TerrainSystem
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: public AzFramework::Terrain::TerrainDataRequestBus::Handler
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, private Terrain::TerrainSystemServiceRequestBus::Handler
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, private AZ::TickBus::Handler
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{
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public:
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TerrainSystem();
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~TerrainSystem();
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///////////////////////////////////////////
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// TerrainSystemServiceRequestBus::Handler Impl
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void SetWorldBounds(const AZ::Aabb& worldBounds) override;
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void SetHeightQueryResolution(AZ::Vector2 queryResolution) override;
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void Activate() override;
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void Deactivate() override;
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void RegisterArea(AZ::EntityId areaId) override;
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void UnregisterArea(AZ::EntityId areaId) override;
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void RefreshArea(AZ::EntityId areaId) override;
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///////////////////////////////////////////
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// TerrainDataRequestBus::Handler Impl
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AZ::Vector2 GetTerrainGridResolution() const override;
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AZ::Aabb GetTerrainAabb() const override;
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//! Returns terrains height in meters at location x,y.
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//! @terrainExistsPtr: Can be nullptr. If != nullptr then, if there's no terrain at location x,y or location x,y is inside a terrain
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//! HOLE then *terrainExistsPtr will become false,
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//! otherwise *terrainExistsPtr will become true.
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float GetHeight(AZ::Vector3 position, Sampler sampler = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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float GetHeightFromFloats(float x, float y, Sampler sampler = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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//! Given an XY coordinate, return the max surface type and weight.
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//! @terrainExists: Can be nullptr. If != nullptr then, if there's no terrain at location x,y or location x,y is inside a terrain
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//! HOLE then *terrainExistsPtr will be set to false,
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//! otherwise *terrainExistsPtr will be set to true.
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AzFramework::SurfaceData::SurfaceTagWeight GetMaxSurfaceWeight(
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AZ::Vector3 position, Sampler sampleFilter = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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AzFramework::SurfaceData::SurfaceTagWeight GetMaxSurfaceWeightFromFloats(
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float x, float y, Sampler sampleFilter = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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//! Convenience function for low level systems that can't do a reverse lookup from Crc to string. Everyone else should use
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//! GetMaxSurfaceWeight or GetMaxSurfaceWeightFromFloats. Not available in the behavior context. Returns nullptr if the position is
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//! inside a hole or outside of the terrain boundaries.
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const char* GetMaxSurfaceName(
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AZ::Vector3 position, Sampler sampleFilter = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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//! Returns true if there's a hole at location x,y.
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//! Also returns true if there's no terrain data at location x,y.
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bool GetIsHoleFromFloats(float x, float y, Sampler sampleFilter = Sampler::BILINEAR) const override;
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// Given an XY coordinate, return the surface normal.
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//! @terrainExists: Can be nullptr. If != nullptr then, if there's no terrain at location x,y or location x,y is inside a terrain
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//! HOLE then *terrainExistsPtr will be set to false,
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//! otherwise *terrainExistsPtr will be set to true.
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AZ::Vector3 GetNormal(
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AZ::Vector3 position, Sampler sampleFilter = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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AZ::Vector3 GetNormalFromFloats(
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float x, float y, Sampler sampleFilter = Sampler::BILINEAR, bool* terrainExistsPtr = nullptr) const override;
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private:
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float GetHeightSynchronous(float x, float y) const;
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AZ::Vector3 GetNormalSynchronous(float x, float y) const;
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// AZ::TickBus::Handler overrides ...
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void OnTick(float deltaTime, AZ::ScriptTimePoint time) override;
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void SystemActivate();
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void SystemDeactivate();
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struct TerrainSystemSettings
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{
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AZ::Aabb m_worldBounds;
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AZ::Vector2 m_heightQueryResolution{ 1.0f };
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bool m_systemActive{ false };
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};
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TerrainSystemSettings m_currentSettings;
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TerrainSystemSettings m_requestedSettings;
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bool m_terrainSettingsDirty = true;
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bool m_terrainHeightDirty = false;
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AZ::Aabb m_dirtyRegion;
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mutable AZStd::shared_mutex m_areaMutex;
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AZStd::map<AZ::EntityId, AZ::Aabb, TerrainLayerPriorityComparator> m_registeredAreas;
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};
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} // namespace Terrain
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