o3de/Gems/AtomLyIntegration/CommonFeatures/Code/Source/CoreLights/CapsuleLightDelegate.h

/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */

#pragma once

#include <CoreLights/LightDelegateBase.h>

#include <AzCore/Component/TransformBus.h>
#include <AzFramework/Entity/EntityDebugDisplayBus.h>

#include <LmbrCentral/Shape/CapsuleShapeComponentBus.h>
#include <LmbrCentral/Shape/ShapeComponentBus.h>

#include <Atom/Feature/CoreLights/CapsuleLightFeatureProcessorInterface.h>

namespace AZ::Render
{
    //! Manages rendering a capsule light through the capsule light feature processor and communication with a capsule shape bus for the
    //! area light component.
    class CapsuleLightDelegate final : public LightDelegateBase<CapsuleLightFeatureProcessorInterface>
    {
    public:
        CapsuleLightDelegate(LmbrCentral::CapsuleShapeComponentRequests* shapeBus, EntityId entityId, bool isVisible);

        // LightDelegateBase overrides...
        float GetSurfaceArea() const override;
        float GetEffectiveSolidAngle() const override;
        float CalculateAttenuationRadius(float lightThreshold) const override;
        void DrawDebugDisplay(
            const Transform& transform,
            const Color& color,
            AzFramework::DebugDisplayRequests& debugDisplay,
            bool isSelected) const override;
        void SetAffectsGI(bool affectsGI) override;
        void SetAffectsGIFactor(float affectsGIFactor) override;
        Aabb GetLocalVisualizationBounds() const override;

    private:
        // LightDelegateBase overrides...
        void HandleShapeChanged() override;

        // Gets the height of the capsule shape without caps
        float GetInteriorHeight() const;

        struct CapsuleVisualizationDimensions
        {
            float m_radius;
            float m_height;
        };

        CapsuleVisualizationDimensions CalculateCapsuleVisualizationDimensions() const;

        LmbrCentral::CapsuleShapeComponentRequests* m_capsuleShapeBus = nullptr;
    };
} // namespace AZ::Render