vrpn_Poser_Analog.h

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#ifndef vrpn_POSER_ANALOG_H
#define vrpn_POSER_ANALOG_H
#include <stdio.h> // for NULL
 
#include "vrpn_Configure.h" // for VRPN_API, VRPN_CALLBACK
#include "vrpn_Poser.h"     // for vrpn_Poser
#include "vrpn_Tracker.h"   // for vrpn_Tracker
#include "vrpn_Types.h"     // for vrpn_float64
 
class VRPN_API vrpn_Analog_Output_Remote;
class VRPN_API vrpn_Connection;
struct vrpn_HANDLERPARAM;
 
// This code is for a Poser server that uses a vrpn_Analog_Output to drive a
// device.
// It is basically the inverse of a vrpn_Tracker_AnalogFly.
// We are assuming that one Analog device will be used to drive all axes.  This
// could be
// Changed by storing an Analog device per axis.
//
// This class can also act as a vrpn_Tracker so that it can report back the new
// positions
// and velocities to the client when the requests are within the bounds.  This
// is not
// what you want it to do if you've got an independent tracker watching your
// output,
// and in any case is open-loop, so use with caution.
 
// Class for holding data used in transforming pose data to analog values for
// each axis
class VRPN_API vrpn_PA_axis {
public:
    vrpn_PA_axis(char *name = NULL, int c = -1, double offset = 0.0,
                 double s = 1.0)
        : ana_name(name)
        , channel(c)
        , offset(offset)
        , scale(s)
    {
    }
 
    char *ana_name; // Name of the Analog Output device to drive with this axis
    int channel; // Which channel to use from the Analog device.  Default value
                 // of -1 means
                 // no motion for this axis
    double offset; // Offset to apply to pose values for this channel to reach 0
    double
        scale; // Scale applied to pose values to get the correct analog value
};
 
// Class for passing in config data.  Usually read from the vrpn.cfg file in the
// server code.
class VRPN_API vrpn_Poser_AnalogParam {
public:
    vrpn_Poser_AnalogParam();
 
    // Translation for the three axes
    vrpn_PA_axis x, y, z;
 
    // Rotation for the three axes
    vrpn_PA_axis rx, ry, rz;
 
    // Workspace max and min info
    vrpn_float64 pos_min[3], pos_max[3], pos_rot_min[3], pos_rot_max[3],
        vel_min[3], vel_max[3], vel_rot_min[3], vel_rot_max[3];
};
 
class VRPN_API vrpn_Poser_Analog; // Forward reference
 
class VRPN_API vrpn_PA_fullaxis {
public:
    vrpn_PA_fullaxis(void)
    {
        ana = NULL;
        value = 0.0;
        pa = NULL;
    };
 
    vrpn_PA_axis axis;
    vrpn_Analog_Output_Remote *ana;
    vrpn_Poser_Analog *pa;
    double value;
};
 
class VRPN_API vrpn_Poser_Analog : public vrpn_Poser, public vrpn_Tracker {
public:
    vrpn_Poser_Analog(const char *name, vrpn_Connection *c,
                      vrpn_Poser_AnalogParam *p, bool act_as_tracker = false);
 
    virtual ~vrpn_Poser_Analog();
 
    virtual void mainloop();
 
protected:
    // Axes for translation and rotation
    vrpn_PA_fullaxis x, y, z, rx, ry, rz;
 
    // Should we act like a tracker, and report back values?
    bool d_act_as_tracker;
 
    static int VRPN_CALLBACK
    handle_change_message(void *userdata, vrpn_HANDLERPARAM p);
    static int VRPN_CALLBACK
    handle_vel_change_message(void *userdata, vrpn_HANDLERPARAM p);
 
    // Routine to update the analog values from the current pose
    bool update_Analog_values();
    bool setup_channel(vrpn_PA_fullaxis *full);
};
 
#endif