box_3f

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// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.
 
#ifndef tools_box_3f
#define tools_box_3f
 
#include "../mnmx"
 
#include <cfloat> // FLT_MAX
 
namespace tools {
 
// optimization (used in exlib/sg/text_hershey) :
 
inline void box_3f_make_empty(float& a_mn_x,float& a_mn_y,float& a_mn_z,
                             float& a_mx_x,float& a_mx_y,float& a_mx_z){
  a_mn_x = FLT_MAX;
  a_mn_y = FLT_MAX;
  a_mn_z = FLT_MAX;
  a_mx_x = -FLT_MAX;
  a_mx_y = -FLT_MAX;
  a_mx_z = -FLT_MAX;
}
inline void box_3f_extend_by(float& a_mn_x,float& a_mn_y,float& a_mn_z,
                            float& a_mx_x,float& a_mx_y,float& a_mx_z,
                            float a_x,float a_y,float a_z){
  if(a_mx_x<a_mn_x){ //is empty.
    a_mn_x = a_x;
    a_mn_y = a_y;
    a_mn_z = a_z;
 
    a_mx_x = a_x;
    a_mx_y = a_y;
    a_mx_z = a_z;
  } else {
    a_mn_x = mn<float>(a_x,a_mn_x);
    a_mn_y = mn<float>(a_y,a_mn_y);
    a_mn_z = mn<float>(a_z,a_mn_z);
 
    a_mx_x = mx<float>(a_x,a_mx_x);
    a_mx_y = mx<float>(a_y,a_mx_y);
    a_mx_z = mx<float>(a_z,a_mx_z);
  }
}
inline bool box_3f_is_empty(float a_mn_x,float a_mx_x) {
  return a_mx_x < a_mn_x;
}
 
}
 
#endif