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Geant4/externals/g4tools/include/tools/sg/mnmx

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  1 // Copyright (C) 2010, Guy Barrand. All rights reserved.
  2 // See the file tools.license for terms.
  3 
  4 #ifndef tools_sg_mnmx
  5 #define tools_sg_mnmx
  6 
  7 #include "node"
  8 #include "bbox_action"
  9 
 10 namespace tools {
 11 
 12 inline bool mnmx(std::ostream& a_out,sg::node& a_node,vec3f& a_mn,vec3f& a_mx){
 13   sg::bbox_action action(a_out);
 14   a_node.bbox(action);
 15   if(!action.end() || action.box().is_empty()) {
 16     a_out << "tools::mnmx :"
 17           << " bbox problem."
 18           << std::endl;
 19     a_mn.set_value(0,0,0);
 20     a_mx.set_value(0,0,0);
 21     return false;
 22   }
 23   a_mn = action.box().mn();
 24   a_mx = action.box().mx();
 25   return true;
 26 }
 27 
 28 }
 29 
 30 #include "matrix"
 31 
 32 namespace tools {
 33 
 34 inline bool center_adjust(std::ostream& a_out,
 35                           sg::node& a_node,sg::matrix& a_tsf,
 36                           unsigned int a_ww,unsigned int a_wh,
 37                           float a_height,
 38                           float& a_dx,float& a_dy,float& a_dz,
 39                           bool a_verbose = true) {
 40   //NOTE : we assume an ortho camera.
 41   if(!a_ww||!a_wh) {
 42     if(a_verbose) {
 43       a_out << "tools::center_adjust :"
 44             << " null viewer width or height."
 45             << std::endl;
 46     }
 47     a_dx = 0;a_dy = 0;a_dz = 0;
 48     return false;
 49   }
 50   sg::bbox_action _action(a_out);
 51   a_node.bbox(_action);
 52   if(!_action.box().get_size(a_dx,a_dy,a_dz)) {
 53     if(a_verbose) {
 54       a_out << "tools::center_adjust :"
 55             << " empty box."
 56             << std::endl;
 57     }
 58     a_dx = 0;a_dy = 0;a_dz = 0;
 59     return false;
 60   }
 61   if(!a_dx||!a_dy) {
 62     if(a_verbose) {
 63       a_out << "tools::center_adjust :"
 64             << " dx or dy null."
 65             << std::endl;
 66     }
 67     a_dx = 0;a_dy = 0;a_dz = 0;
 68     return false;
 69   }
 70   vec3f c;
 71   if(!_action.box().center(c)) {
 72     if(a_verbose) {
 73       a_out << "tools::center_adjust :"
 74             << " can't get box center."
 75             << std::endl;
 76     }
 77     a_dx = 0;a_dy = 0;a_dz = 0;
 78     return false;
 79   }
 80   float vp_aspect = float(a_ww)/float(a_wh);
 81   float scene_aspect = float(a_dx)/float(a_dy);
 82   //::printf("debug : set_tsf : %d %d : %g %g %g : %g %g\n",
 83   //    a_ww,a_wh,a_dx,a_dy,a_dz,vp_aspect,scene_aspect);
 84   float scale;
 85   if(vp_aspect>=scene_aspect) {
 86     scale = a_height/a_dy;
 87   } else {
 88     scale = (vp_aspect*a_height)/a_dx;
 89   }
 90   a_tsf.set_scale(scale,scale,scale);
 91   a_tsf.mul_translate(-c.x(),-c.y(),0);
 92   return true;
 93 }
 94 
 95 inline bool center_adjust(std::ostream& a_out,
 96                           sg::node& a_node,sg::matrix& a_tsf,
 97                           unsigned int a_ww,unsigned int a_wh,
 98                           float a_height,bool a_verbose = true) {
 99   float dx,dy,dz;
100   return center_adjust(a_out,a_node,a_tsf,a_ww,a_wh,a_height,
101                        dx,dy,dz,a_verbose);
102 }
103 
104 }
105 
106 #endif