YiAbstractCameraSceneNode.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_ABSTRACT_CAMERA_SCENE_NODE_H_
#define _YI_ABSTRACT_CAMERA_SCENE_NODE_H_

#include "renderer/YiUniformBufferId.h"
#include "renderer/YiViewport.h"
#include "scenetree/YiSceneNode.h"
#include "utility/YiRtti.h"

class CYIAbstractCameraSceneNode : public CYISceneNode 
{
public:
    void SetUpVector(const glm::vec3 &fCamUp);

    const glm::vec3 &GetUpVector() const;

    void SetTarget(CYISceneNode *pTargetNode);

    CYISceneNode *GetTarget() const;

    void RemoveTarget();

    const glm::mat4 &GetCameraMatrix() const;

    void SetViewport(const CYIViewport &viewport);

    const CYIViewport &GetViewport() const;

    const glm::mat4 &GetViewMatrix() const;

    const glm::mat4 &GetProjectionMatrix() const;

protected:
    CYIAbstractCameraSceneNode();

    void DirtyProjectionMatrix();

    virtual glm::mat4 CalculateProjectionMatrix() const = 0;

    glm::mat4 CalculateViewMatrix() const;

    glm::mat4 CalculateViewportMatrix() const;

    const glm::mat4 &GetViewportWorldMatrix() const;

    virtual void UpdateEnd() override;

    virtual CYIString GetDumpTreeString() const override;

private:
    bool IsViewMatrixDirty() const;
    bool IsViewportMatrixDirty() const;

    CYISceneNode *m_pTargetNode;
    glm::mat4 m_fCameraMatrix;
    glm::mat4 m_fProjectionMatrix;
    glm::mat4 m_fViewMatrix;
    CYIViewport m_Viewport;
    glm::mat4 m_fViewportTransform;
    bool m_bViewportDirty;
    bool m_bProjectionMatrixDirty;
    bool m_bTargetChanged;
    glm::vec3 m_fUpVector;
    
    YI_TYPE_BASES(CYIAbstractCameraSceneNode, CYISceneNode)
};

#ifdef YI_FUNCTION_SPECIALIZATION_FULLY_SUPPORTED
template<>
inline const CYIAbstractCameraSceneNode *YiDynamicCast<CYIAbstractCameraSceneNode>(const CYISceneNode *pObject)
{
    return pObject ? (pObject->CanCastTo<CYIAbstractCameraSceneNode>() ? static_cast<const CYIAbstractCameraSceneNode *>(pObject) : nullptr) : nullptr;
}
#endif

#endif // _YI_ABSTRACT_CAMERA_SCENE_NODE_H_