source/port.cpp

   1 /* $Id$
   2
   3 This file is part of NetVis
   4 Copyright @ 2008 Mikko Rasa, Mikkosoft Productions
   5 Distributed unter the GPL
   6 */
   7
   8 #include <cstdlib>
   9 #include <netinet/in.h>
  10 #include <netdb.h>
  11 #include <msp/gl/immediate.h>
  12 #include <msp/gl/matrix.h>
  13 #include <msp/gl/meshbuilder.h>
  14 #include <msp/gl/texture.h>
  15 #include <msp/strings/lexicalcast.h>
  16 #include "port.h"
  17 #include "netvis.h"
  18
  19 using namespace std;
  20 using namespace Msp;
  21
  22 Port::Port(NetVis &v, unsigned n):
  23         netvis(v),
  24         number(n),
  25         mesh((GL::COLOR4_UBYTE, GL::VERTEX2))
  26 {
  27         char buf[128];
  28         sockaddr_in addr;
  29         addr.sin_family = AF_INET;
  30         addr.sin_port = ntohs(number);
  31         addr.sin_addr.s_addr = 0;
  32         int err = getnameinfo(reinterpret_cast<sockaddr *>(&addr), sizeof(sockaddr_in), 0, 0, buf, sizeof(buf), 0);
  33         if(err==0)
  34                 name = buf;
  35         else
  36                 name = Msp::lexical_cast(number);
  37
  38         const map<unsigned, Port *> &ports = netvis.get_ports();
  39         unsigned tries = 100;
  40         if(ports.size()>100 && number>=1024)
  41                 tries = 10000/ports.size()+1;
  42         float best_score = 0;
  43         for(unsigned i=0; (i<tries && best_score<1); ++i)
  44         {
  45                 GL::Color c;
  46                 c.r = rand()*1.0/RAND_MAX;
  47                 c.g = rand()*1.0/RAND_MAX;
  48                 c.b = rand()*1.0/RAND_MAX;
  49                 float high = max(max(c.r, c.g), c.b);
  50                 c = c*(1.0/high);
  51                 if(number<1024)
  52                 {
  53                         float low = min(min(c.r, c.g), c.b);
  54                         c = (c+-low)*(1/(1-low));
  55                 }
  56                 else
  57                         c = c*0.6+0.4;
  58
  59                 float score = 2;
  60                 for(map<unsigned, Port *>::const_iterator j=ports.begin(); j!=ports.end(); ++j)
  61                 {
  62                         if(number<1024 && j->first>1024)
  63                                 break;
  64                         const GL::Color &other = j->second->get_color();
  65                         float dr = c.r-other.r;
  66                         float dg = c.g-other.g;
  67                         float db = c.b-other.b;
  68                         score = min(score, dr*dr+dg*dg+db*db);
  69                 }
  70                 if(score>best_score)
  71                 {
  72                         best_score = score;
  73                         color = c;
  74                 }
  75         }
  76         color.a = 0.4f;
  77
  78         GL::MeshBuilder bld(mesh);
  79         bld.begin(GL::QUADS);
  80         bld.color(color.r, color.g, color.b, color.a);
  81         for(unsigned x=0; x<=4; x+=2)
  82         {
  83                 bld.vertex(x+0, 0);
  84                 bld.vertex(x+10, 0);
  85                 bld.vertex(x+10, 10);
  86                 bld.vertex(x+0, 10);
  87         }
  88         bld.end();
  89 }
  90
  91 void Port::render() const
  92 {
  93         GL::PushMatrix push_;
  94         mesh.draw();
  95         GL::translate(16, 1, 0);
  96         GL::scale_uniform(10);
  97         GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
  98         netvis.get_font().draw_string(name, imm);
  99         GL::Texture::unbind();
 100 }