llmaniprotate.h

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#ifndef LL_LLMANIPROTATE_H
#define LL_LLMANIPROTATE_H

#include "lltool.h"
#include "v3math.h"
#include "v4math.h"
#include "llquaternion.h"
#include "llregionposition.h"
#include "llmanip.h"
#include "llviewerobject.h"

class LLToolComposite;
class LLColor4;

class LLManipRotate : public LLManip
{
public:
        class ManipulatorHandle
        {
        public:
                LLVector3       mAxisU;
                LLVector3       mAxisV;
                U32                     mManipID;

                ManipulatorHandle(LLVector3 axis_u, LLVector3 axis_v, U32 id) : mAxisU(axis_u), mAxisV(axis_v), mManipID(id){}
        };
        
        LLManipRotate( LLToolComposite* composite );

        virtual BOOL    handleMouseDown( S32 x, S32 y, MASK mask );
        virtual BOOL    handleMouseUp( S32 x, S32 y, MASK mask );
        virtual BOOL    handleHover( S32 x, S32 y, MASK mask );
        virtual void    render();

        virtual void    handleSelect();
        virtual void    handleDeselect();

        virtual BOOL    handleMouseDownOnPart(S32 x, S32 y, MASK mask);
        virtual void    highlightManipulators(S32 x, S32 y);
        virtual BOOL    canAffectSelection();
        
private:
        void                    updateHoverView();

        void                    drag( S32 x, S32 y );
        LLVector3               projectToSphere( F32 x, F32 y, BOOL* on_sphere );

        void                    renderSnapGuides();
        void                    renderActiveRing(F32 radius, F32 width, const LLColor4& center_color, const LLColor4& side_color);

        BOOL                    updateVisiblity();
        LLVector3               findNearestPointOnRing( S32 x, S32 y, const LLVector3& center, const LLVector3& axis );

        LLQuaternion    dragUnconstrained( S32 x, S32 y );
        LLQuaternion    dragConstrained( S32 x, S32 y );
        LLVector3               getConstraintAxis();
        S32                             getObjectAxisClosestToMouse(LLVector3& axis);

        // Utility functions
        static void                     mouseToRay( S32 x, S32 y, LLVector3* ray_pt, LLVector3* ray_dir );
        static LLVector3        intersectMouseWithSphere( S32 x, S32 y, const LLVector3& sphere_center, F32 sphere_radius );
        static LLVector3        intersectRayWithSphere( const LLVector3& ray_pt, const LLVector3& ray_dir, const LLVector3& sphere_center, F32 sphere_radius);

private:
        LLVector3d                      mRotationCenter;                        
        LLCoordGL                       mCenterScreen;
//      S32                                     mLastHoverMouseX;               // used to suppress hover if mouse doesn't move
//      S32                                     mLastHoverMouseY;
        LLQuaternion            mRotation;
        
        LLVector3                       mMouseDown;
        LLVector3                       mMouseCur;
        F32                                     mRadiusMeters;
        
        LLVector3                       mCenterToCam;
        LLVector3                       mCenterToCamNorm;
        F32                                     mCenterToCamMag;
        LLVector3                       mCenterToProfilePlane;
        F32                                     mCenterToProfilePlaneMag;

        EManipPart                      mManipPart;

        BOOL                            mSendUpdateOnMouseUp;

        BOOL                            mSmoothRotate;
        BOOL                            mCamEdgeOn;

        LLVector4                       mManipulatorVertices[6];
        LLVector4                       mManipulatorScales;
};

#endif  // LL_LLMANIPROTATE_H

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