#ifndef _UTILS_H
#define _UTILS_H

#include "proj.h"

class Gl_Win;
class Panel;

// if a is close to a target
bool CLOSE_TO( double a, double target);

void set_light( const GLfloat light_pos[3] );


// init an input button's label align and assign init val
void init_int_input_button(Fl_Int_Input *b, int align, int init_val);


// a quick and dirty hack for rotating the eyepoint
// Gleicher's code
void orbit(int mx, int my, double lx, double ly, double lz, 
							double ex, double ey, double ez,
							double& rx, double& ry, double& rz);

// if mouse stroke to left: zoomOut; to right: zoomIn
void zoom(int mouseDragXdist, double &fieldOfView);


void ik_springCB(Fl_Value_Slider *s, Gl_Win *gl);

void ik_dampCB(Fl_Value_Slider *s, Gl_Win *gl);

void ik_sensitiveCB(Fl_Value_Slider *s, Gl_Win *gl);

// remove all keys
void key_clearCB(Fl_Widget* wid, Fl_Widget *container);

// remove this key
void key_rmvCB(Fl_Widget* wid, Fl_Widget *container);

// print all keys
void key_printCB(Fl_Widget* wid, Fl_Widget *container);

// key every nth frame.
void key_nthCB(Fl_Widget* wid, Fl_Widget *container);

// key the frame slider is at
void key_addCB(Fl_Widget* wid, Fl_Widget *container);

// begin frame button cb
void beginCB(Fl_Widget* wid, Fl_Widget *container);

// end frame button cb
void endCB(Fl_Widget* wid, Fl_Widget *container);

// switch bw real time and const spd play back
void play_modeCB(Fl_Widget* wid, Fl_Widget *container);

//in out files
void in_bvhCB(Fl_Menu_*, Panel  *win);
void in_qbvhCB(Fl_Menu_*, Panel  *win);
void out_qbvhCB(Fl_Menu_*, Panel  *win);


// choose euler interp options and invoke appropriate interp routine
void euler_browserCB(Fl_Widget* wid, Fl_Widget *container);

// choose quat interp options and invoke appropriate interp routine
void quat_browserCB(Fl_Widget* wid, Fl_Widget *container);

// choose exp map interp options and invoke appropriate interp routine
void emap_browserCB(Fl_Widget* wid, Fl_Widget *container);


// load marker request file
void in_marker_fileCB(Fl_Widget* wid, Gl_Win *win);

// write marker coord to file
void out_marker_fileCB(Fl_Widget* wid, Gl_Win *win);

// choose whether and how to show markers (which rotation to use)
void marker_rotType_browserCB(Fl_Widget* wid, Fl_Widget *container);

// sel markers to be drawn
void marker_sel_browserCB(Fl_Widget* wid, Fl_Widget *container);

// turn on the light src
void lightCB(Fl_Widget* in_slider, Fl_Widget* in_wind);

// draw the floor
void floorCB(Fl_Widget* in_slider, Fl_Widget* in_wind);

// sel camera view
void cameraCB(Fl_Round_Button *b, Gl_Win  *win);

void camera_omin(int frame_cnt, double *trans, double look[3], double eye[3]);

void adjust_follow_theta(int mouseDragXdist, double &follow_theta);

void adjust_follow_phi(int mouseDragYdist, double &follow_phi);

void adjust_follow_lag(int mouseDragXdist, double &follow_lag);


#endif