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141 lines
5.6 KiB
C++
141 lines
5.6 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/Component/Component.h>
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#include <AzCore/Component/TransformBus.h>
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#include <AzFramework/Components/CameraBus.h>
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#include <Atom/RPI.Public/Base.h>
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#include <Atom/RPI.Public/ViewportContextBus.h>
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#include <Atom/RPI.Public/ViewProviderBus.h>
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#include <Atom/RPI.Public/AuxGeom/AuxGeomFeatureProcessorInterface.h>
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namespace Camera
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{
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static constexpr float DefaultFoV = 75.0f;
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static constexpr float MinFoV = std::numeric_limits<float>::epsilon();
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static constexpr float MaxFoV = AZ::RadToDeg(AZ::Constants::Pi);
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static constexpr float MinimumNearPlaneDistance = 0.001f;
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static constexpr float DefaultNearPlaneDistance = 0.2f;
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static constexpr float DefaultFarClipPlaneDistance = 1024.0f;
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static constexpr float DefaultFrustumDimension = 256.f;
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struct CameraComponentConfig final
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: public AZ::ComponentConfig
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{
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AZ_RTTI(CameraComponentConfig, "{064A5D64-8688-4188-B3DE-C80CE4BB7558}", AZ::ComponentConfig);
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static void Reflect(AZ::ReflectContext* context);
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float GetFarClipDistance() const;
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float GetNearClipDistance() const;
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AZ::EntityId GetEditorEntityId() const;
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AZ::u32 GetPerspectiveParameterVisibility() const;
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AZ::u32 GetOrthographicParameterVisibility() const;
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// Reflected members
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float m_fov = DefaultFoV;
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float m_nearClipDistance = DefaultNearPlaneDistance;
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float m_farClipDistance = DefaultFarClipPlaneDistance;
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float m_frustumWidth = DefaultFrustumDimension;
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float m_frustumHeight = DefaultFrustumDimension;
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bool m_specifyFrustumDimensions = false;
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AZ::u64 m_editorEntityId = AZ::EntityId::InvalidEntityId;
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bool m_makeActiveViewOnActivation = true;
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bool m_orthographic = false;
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float m_orthographicHalfWidth = 5.f;
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};
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class CameraComponentController
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: public CameraBus::Handler
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, public CameraRequestBus::Handler
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, public AZ::TransformNotificationBus::Handler
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, public AZ::RPI::ViewportContextNotificationBus::Handler
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, public AZ::RPI::ViewProviderBus::Handler
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{
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public:
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AZ_TYPE_INFO(CameraComponentController, "{A27A0725-8C07-4BF2-BF95-B6CB0CBD01B8}");
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CameraComponentController() = default;
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explicit CameraComponentController(const CameraComponentConfig& config);
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//! Defines a callback for determining whether this camera should push itself to the top of the Atom camera stack.
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//! Used by the Editor to disable undesirable camera changes in edit mode.
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void SetShouldActivateFunction(AZStd::function<bool()> shouldActivateFunction);
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// Controller interface
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static void Reflect(AZ::ReflectContext* context);
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static void GetRequiredServices(AZ::ComponentDescriptor::DependencyArrayType& required);
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static void GetProvidedServices(AZ::ComponentDescriptor::DependencyArrayType& provided);
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static void GetIncompatibleServices(AZ::ComponentDescriptor::DependencyArrayType& incompatible);
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void Init();
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void Activate(AZ::EntityId entityId);
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void Deactivate();
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void SetConfiguration(const CameraComponentConfig& config);
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const CameraComponentConfig& GetConfiguration() const;
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AZ::RPI::ViewportContextPtr GetViewportContext();
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// CameraBus::Handler interface
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AZ::EntityId GetCameras() override;
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// CameraRequestBus::Handler interface
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float GetFovDegrees() override;
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float GetFovRadians() override;
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float GetNearClipDistance() override;
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float GetFarClipDistance() override;
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float GetFrustumWidth() override;
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float GetFrustumHeight() override;
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bool IsOrthographic() override;
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float GetOrthographicHalfWidth() override;
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void SetFovDegrees(float fov) override;
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void SetFovRadians(float fov) override;
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void SetNearClipDistance(float nearClipDistance) override;
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void SetFarClipDistance(float farClipDistance) override;
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void SetFrustumWidth(float width) override;
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void SetFrustumHeight(float height) override;
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void SetOrthographic(bool orthographic) override;
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void SetOrthographicHalfWidth(float halfWidth) override;
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void MakeActiveView() override;
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bool IsActiveView() override;
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// AZ::TransformNotificationBus::Handler interface
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void OnTransformChanged(const AZ::Transform& local, const AZ::Transform& world) override;
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// AZ::RPI::ViewportContextNotificationBus::Handler interface
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void OnViewportSizeChanged(AzFramework::WindowSize size) override;
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void OnViewportDefaultViewChanged(AZ::RPI::ViewPtr view) override;
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// AZ::RPI::ViewProviderBus::Handler interface
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AZ::RPI::ViewPtr GetView() const override;
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private:
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AZ_DISABLE_COPY(CameraComponentController);
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void ActivateAtomView();
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void DeactivateAtomView();
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void UpdateCamera();
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void SetupAtomAuxGeom(AZ::RPI::ViewportContextPtr viewportContext);
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CameraComponentConfig m_config;
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AZ::EntityId m_entityId;
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// Atom integration
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AZ::RPI::ViewPtr m_atomCamera;
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AZ::RPI::AuxGeomDrawPtr m_atomAuxGeom;
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AZ::Event<const AZ::Matrix4x4&>::Handler m_onViewMatrixChanged;
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bool m_updatingTransformFromEntity = false;
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bool m_isActiveView = false;
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AZStd::function<bool()> m_shouldActivateFn;
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};
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} // namespace Camera
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