include/root/TGLCameraOverlay.h

0001 // @(#)root/gl:$Id$
0002 // Author: Alja Mrak-Tadel 2007
0003
0004 /*************************************************************************
0005  * Copyright (C) 1995-2007, Rene Brun and Fons Rademakers.               *
0006  * All rights reserved.                                                  *
0007  *                                                                       *
0008  * For the licensing terms see $ROOTSYS/LICENSE.                         *
0009  * For the list of contributors see $ROOTSYS/README/CREDITS.             *
0010  *************************************************************************/
0011
0012 #ifndef ROOT_TGLCameraOverlay
0013 #define ROOT_TGLCameraOverlay
0014
0015 #include "TAttAxis.h"
0016 #include "TGLOverlay.h"
0017 #include "TGLUtil.h"
0018
0019 class TGLAxisPainter;
0020 class TGLFont;
0021
0022 class TAttAxis;
0023 class TAxis;
0024
0025 class TGLCameraOverlay : public TGLOverlayElement
0026 {
0027 public:
0028    enum EMode { kPlaneIntersect, kBar, kAxis, kGridFront, kGridBack };
0029
0030 private:
0031    TGLCameraOverlay(const TGLCameraOverlay&) = delete;
0032    TGLCameraOverlay& operator=(const TGLCameraOverlay&) = delete;
0033
0034 protected:
0035    Bool_t         fShowOrthographic;
0036    Bool_t         fShowPerspective;
0037
0038    EMode          fOrthographicMode;
0039    EMode          fPerspectiveMode;
0040
0041    TGLAxisPainter *fAxisPainter;
0042    TAxis          *fAxis;
0043    Float_t         fAxisExtend;
0044    Bool_t          fUseAxisColors;
0045
0046    TGLPlane       fExternalRefPlane;
0047    Bool_t         fUseExternalRefPlane;
0048
0049    Double_t       fFrustum[4];
0050
0051
0052    void    RenderPlaneIntersect(TGLRnrCtx& rnrCtx);
0053    void    RenderAxis(TGLRnrCtx& rnrCtx, Bool_t drawGrid);
0054    void    RenderGrid(TGLRnrCtx& rnrCtx);
0055    void    RenderBar(TGLRnrCtx& rnrCtx);
0056
0057 public:
0058    TGLCameraOverlay(Bool_t showOrtho=kTRUE, Bool_t showPersp=kFALSE);
0059    ~TGLCameraOverlay() override;
0060
0061     void   Render(TGLRnrCtx& rnrCtx) override;
0062
0063    TGLPlane& RefExternalRefPlane() { return fExternalRefPlane; }
0064    void      UseExternalRefPlane(Bool_t x) { fUseExternalRefPlane=x; }
0065    Bool_t    GetUseExternalRefPlane() const { return fUseExternalRefPlane; }
0066
0067    Int_t    GetPerspectiveMode() const { return fPerspectiveMode;}
0068    void     SetPerspectiveMode(EMode m) {fPerspectiveMode = m;}
0069    Int_t    GetOrthographicMode() const { return fOrthographicMode;}
0070    void     SetOrthographicMode(EMode m) {fOrthographicMode = m;}
0071
0072    Bool_t   GetShowOrthographic() const { return fShowOrthographic; }
0073    void     SetShowOrthographic(Bool_t x) {fShowOrthographic =x;}
0074    Bool_t   GetShowPerspective() const { return fShowPerspective; }
0075    void     SetShowPerspective(Bool_t x) {fShowPerspective =x;}
0076
0077    void     SetFrustum(TGLCamera& cam);
0078
0079    TAttAxis* GetAttAxis();
0080
0081    ClassDefOverride(TGLCameraOverlay, 1); // Show coorinates of current camera frustum.
0082 };
0083
0084 #endif