moldpers.h

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// $Id: moldpers.h 751 2006-03-31 15:43:49Z alex $
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 */
// Header for the perspective mould shapes implementation

#ifndef INC_PERSPECTIVE
#define INC_PERSPECTIVE

#include "moldshap.h"
#include "nodemold.h"
#include "gmould.h"

#define PER_NUMCOORDS 4
#define PER_UNDEFINED ((INT32)(0x80000000))

typedef enum PerspectiveClick 
{
    PClick_DoNothing,
    PClick_EditVPoint0,
    PClick_EditVPoint1
};


/*******************************************************************************************

>   class GPerspective : Public GMould

    Author:     Gavin_Theobald (Xara Group Ltd) <camelotdev@xara.com> & Mike
    Created:    12/02/94
    Purpose:    The perspective function class.

********************************************************************************************/

class GPerspective : public GMould
{
    CC_DECLARE_MEMDUMP(GPerspective)

    public:
        GPerspective();

        virtual BOOL Redefine( POINT *P ) ;
        virtual void CopyShape( POINT *P ) ;
        virtual BOOL FitPath(CONST POINT *IPoints,  
                             CONST BYTE  *ITypes, 
                             DWORD ILength,
                             LPPOINT OPoints, 
                             LPBYTE  OTypes, 
                             DWORD OLength, 
                             BOOL Close = FALSE);

        BOOL Valid() ;
        BOOL WhichVanishingPoint(POINT v, BOOL& b) ;
        void VanishingPoints( POINT& a, POINT& b ) ;
        INT32 GetVPointState();
        void DragVanishingPoints( POINT& NewI, BOOL Flag, LPPOINT P ) ;

    private:
        virtual void ScaleView();
        virtual void CalcViewBBox();
        virtual void CalcViewConsts();
        virtual void Transform( DPOINT a, DPOINT& b ) ;

        void Intersect( DPOINT I, DPOINT P0, DPOINT P1, DPOINT P2, POINT& O ) ;

    private:
        POINT  P0, P1, P2, P3 ;
        DPOINT V0, V1, V2, V3 ;
        BOOL   I0flag, I1flag ;
        BOOL   I0pos,  I1pos  ;
        DPOINT I0, I1 ;
        DPOINT A, B ;
} ;




/*******************************************************************************************

>   class MouldPerspective: public MouldGeometry

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/12/94
    Purpose:    The perspective mould class. This mould implements a rectangular transform
                with true perspective.

********************************************************************************************/

class MouldPerspective: public MouldGeometry
{
    friend class RecordPerspectiveAction;

    CC_DECLARE_DYNAMIC(MouldPerspective);

    public:
         MouldPerspective();
        ~MouldPerspective();
    
        // funcs to initialise a perspective
        virtual BOOL Validate(Path* const pPath, UINT32& errorID);
        virtual BOOL Define(Path* const pPath, DocRect* const pRect);
        virtual MouldSpace Describe() {return MOULDSPACE_PERSPECTIVE;}
        
        // functions to create a moulded object
        virtual BOOL MouldPathToPath(Path* pSourcePath, Path* PDestinPath);
        virtual BOOL MouldBitmapToTile(KernelBitmap* pSourceBlit, KernelBitmap* pDestinBlit);
        virtual BOOL MouldPoint(DocCoord p, DocCoord& q);

        // functions to render an object through the mould
        virtual void MouldPathRender(Path* pPath, RenderRegion* pRegion);
        virtual void MouldBitmapRender(KernelBitmap* pBlit, DocCoord* pParallel, RenderRegion* pRegion);

        virtual void RenderControlBlobs(RenderRegion* pRegion);
        virtual void RenderDragBlobs(Spread* pSpread);
        virtual void DisableControlBlobs();
        virtual void EnableControlBlobs();
        virtual void ToggleControlBlobs(Spread* pSpread);
        virtual DocRect GetBlobBoundingRect();
        virtual DocRect GetSourceRect();
        virtual UINT32 GetByteSize() const { return sizeof(MouldPerspective); };

        virtual BOOL OnClick(DocCoord, ClickType, ClickModifiers, Spread*, NodeMould*);
        virtual BOOL OnMouseMove(DocCoord Coord, Spread* pSpread, ClickModifiers Mods, INT32* ctype, INT32* msgres);
        virtual void Transform(Path* const pPath, DocRect* const pRect, TransformBase& Trans );
        virtual MouldGeometry* MakeCopy();
        virtual ChangeCode RecordContext(UndoableOperation*);
        virtual ChangeCode RecordBlobs(UndoableOperation* pOp, Spread* pSpread);

    public:
        // none virtual functions local to this class.
        void GetVanishingPoints(DocCoord& p0, DocCoord& p1);
        void MoveVanishingPoints(DocCoord p0, DocCoord p1);
        void CopyShape(DocCoord* pCoords);
        BOOL MoveVanishingPoint(DocCoord OldPoint, DocCoord& NewPoint);
        DocRect CalcBlobClipRect(const DocCoord& p0);

        static BOOL WillBeValid(POINT* P);

    protected:
        BOOL CopyContents(MouldPerspective*);
        RECT BuildRectangle(DocRect* const pOrigBBox);

    private:
        void RenderGrid(Spread* pSpread);
        void RenderGrid(RenderRegion* pRegion);
        void RenderGridPoints(RenderRegion* pRegion);
        void RenderVanishingPoints(Spread* pSpread);
        void RenderVanishingPoints(RenderRegion* pRegion);
        void RenderVanishingPoint(Spread* pSpread, const DocCoord& dcPos);
        BOOL BuildShape(POINT* pPoints, DocRect* const pOrigBBox);
        void ShowVPoints();
        PerspectiveClick DetermineClickEffect(DocCoord PointerPos,Spread* pSpread);
        
    private:
        INT32 GridState;
        GPerspective Perspective;

};



/********************************************************************************************

>   class PerspectiveShapes

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    11/12/94
    Purpose:    The default perspective shapes class. This class provides a bunch of static
                functions to create some default shapes. All shapes are defined on a 
                (0,0),(72000,72000) coordinate system. 

********************************************************************************************/

class PerspectiveShapes
{
    public:
        static BOOL Rectangular(Path* pPath);
        static BOOL LeftWall(Path* pPath);
        static BOOL RightWall(Path* pPath);
        static BOOL Floor(Path* pPath);
        static BOOL Ceiling(Path* pPath);

    private:
        static BOOL MakeShape(Path* pPath, DocCoord* point);

};


/********************************************************************************************

    class RecordPerspectiveAction : public Action

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/01/95
    Purpose:    This class records undo/redo information for the Perspective shape object.
    
********************************************************************************************/

class RecordPerspectiveAction : public Action
{
    CC_DECLARE_DYNCREATE(RecordPerspectiveAction)

    public:
         RecordPerspectiveAction();
        ~RecordPerspectiveAction();
        virtual ActionCode Execute();
        static ActionCode Init( Operation* pOp,
                                ActionList* pActionList,
                                MouldPerspective* pPerspective,
                                Action** NewAction);
    private:
        MouldPerspective*   pCPerspective;
        POINT               RecordArray[PER_NUMCOORDS];
};


#endif

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