MSS/MSS_KnifeState.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Side Effects Software Inc
 *      123 Front Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        MSS_KnifeState.h
 *
 * COMMENTS:
 *      Knifes selected polygons using a plane that is 
 *      specified by the user.
 */

#ifndef __MSS_KnifeState_H__
#define __MSS_KnifeState_H__

#include "MSS_API.h"
#include <UT/UT_Vector3.h>
#include <UT/UT_Vector3Array.h>
#include <UI/UI_Value.h>
#include "MSS_SingleOpBaseState.h"


class BM_View;
class GU_Detail;
class JEDI_View;
class mss_UndoValues;

class MSS_API MSS_KnifeState : public MSS_SingleOpBaseState
{
    friend class mss_UndoValues;

public:
    
    // Class constructor and destructor.
    MSS_KnifeState(JEDI_View &view, PI_StateTemplate &templ,
                       BM_SceneManager *scene);
    virtual ~MSS_KnifeState();

    // This constructor and parameter template list go into the
    // PI_StateTemplate for this state.
    static BM_State     *ourConstructor(BM_View &view, 
                                        PI_StateTemplate &templ,
                                        BM_SceneManager *scene);

    static PRM_Template  ourTemplateList[];    

    // The name and type of this class:
    virtual const char  *className() const; 

    // Mouse events are passed on to all visible PI's.
    virtual int          handleMouseEvent(UI_Event *event);

    int                  handlePickEvent(UI_Event *event);
    
    virtual int          handleKeyTypeEvent(UI_Event *event,
                                            BM_Viewport &/*viewport*/);
    
    virtual int          getToolboxCount() const;

protected:
    
    // Enter or exit this state.
    // enter() returns 0 if entered and -1 if not.
    virtual int          enter(BM_SimpleState::BM_EntryType how);
    virtual void         exit(void);

    // Interrupt this state or resume its activity.
    virtual void         interrupt(BM_SimpleState * = 0);
    virtual void         resume(BM_SimpleState * = 0);

    // Remove the selected orientation and prompt for a new direction vector
    virtual void         restart(void);
    
    // Methods to undo and redo the build flags and the handle links.
    void                 undoBuild();
    void                 redoBuild();

    // Set-up state for the first time
    virtual void         doGenerate();

    // Show current mouse position and line path
    virtual void         doRender(RE_Render *r, short x, short y, int ghost);

private:
    
    // Sets the values in the clip sop to orient it in 
    // the specified direction
    void                 setDirection();

private:
    
    // Start and End point that define the normal Vector for the Knife
    UT_Vector3           myStartPoint;
    UT_Vector3           myEndPoint;
    UT_Vector3           myMouseCoord; // Tracks current mouse position
    bool                 myMouseMoving;
    int                  mySelectCount; // Tracks the no. of points selected
    int                  myInputId; 
    
    // Direction vectors that define the clip plane
    UT_Vector3           myRay1, myRay2; 
};

#endif

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