mouse.h

// protect multiple inclusion
#ifndef _MOUSE_H_INCLUDED_
#define _MOUSE_H_INCLUDED_

#include "error.h"

// forward declaration to prevent #include here
class NxActor;


class Mouse
{
public:
        // size = length of each side of our mouseActor
        // mouseOperatingHight = virtual plane Y-hight where mouse moves on
        // pickedActorLiftUp = picked actors will be lift up from ther original position
        Mouse( NxReal size, NxReal mouseOperatingHight, NxReal pickedActorLiftUp );
        ~Mouse();

        // set new position on virtual plane, transformed from screen x/y
        ERR_TYPE moveTo( NxU32 x, NxU32 y );
        // lift actor and create joint with our mouseActor, joint is an "elastic strap"
        ERR_TYPE pickActorElasticStrap( NxActor* actor );
        // lift actor and create joint with our mouseActor, joint is a "fixed connection"
        ERR_TYPE pickActorFixed( NxActor* actor );
        // release joint with active actor
        ERR_TYPE dropActor();
        // returns valid NxActor if mouse raycast hits an actor in the scene
        // transformed from screen x/y
        // NULL otherwise 
        NxActor* actorHit( NxU32 inX, NxU32 inY );

private:
        ERR_TYPE createMouseActor( NxReal size );
        ERR_TYPE createDistanceJoint( NxActor* actor, NxVec3 position );
        ERR_TYPE createSphericalJoint( NxActor* actor, NxVec3 position );
        NxVec3 getRayIntersectionWithTable( irr::core::line3df line );
        line3df getCameraToTableRay( irr::s32 mouseX, irr::s32 mouseY );

        NxActor* mouseActor;
        NxJoint* joint;
        NxReal mouseOperatingHight;
        NxReal pickedActorLiftUp;
};


#endif // #ifndef _MOUSE_H_INCLUDED_

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