Camera.hpp

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#pragma once
 
#include "Slot.hpp"
#include "ElementRenderer.hpp"
#include <ivorium_systems/ivorium_systems.hpp>
 
namespace iv
{
 
class Camera : public Slot, private ElementRenderer
{
public:
ClientMarker cm;
using Slot::instance;
 
                        Camera( Instance *, RenderTarget::Geometry );
                        ~Camera();
    
    void                status( iv::TableDebugView * view );
    
    void                render_scene( Elem * view = nullptr );
    
    void                geometry( RenderTarget::Geometry geometry );
    
    virtual Camera *    elem_getRoot() override;
    
//----------------- math --------------------------------------
    float3              FromLocalSpaceToViewportSpace( float4x4 model_transform, float3 );
    float3              FromViewportSpaceToLocalSpace( float4x4 model_transform, float3 );
    float2              FromViewportPlaneToLocalPlane( float4x4 model_transform, float2 );
    
private:
    float3              WNormalized( float4 in );
    float3              FromViewportSpaceToCameraSpace( float3 screen_point );
    float3              FromCameraSpaceToViewportSpace( float3 camera_point );
    
private:
    CameraState state;
    float2 viewport_size;
};
 
}