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         registered(false),
  26         mesh((GL::COLOR4_UBYTE, GL::VERTEX2))
  27 {
  28         char buf[128];
  29         sockaddr_in addr;
  30         addr.sin_family = AF_INET;
  31         addr.sin_port = ntohs(number);
  32         addr.sin_addr.s_addr = 0;
  33         int err = getnameinfo(reinterpret_cast<sockaddr *>(&addr), sizeof(sockaddr_in), 0, 0, buf, sizeof(buf), 0);
  34         if(err==0)
  35         {
  36                 name = buf;
  37                 registered = !isdigit(name[0]);
  38         }
  39         else
  40                 name = Msp::lexical_cast(number);
  41
  42         const map<unsigned, Port *> &ports = netvis.get_ports();
  43         unsigned tries = 100;
  44         if(ports.size()>100 && !registered)
  45                 tries = 10000/ports.size()+1;
  46         float best_score = 0;
  47         for(unsigned i=0; (i<tries && best_score<1); ++i)
  48         {
  49                 GL::Color c;
  50                 c.r = rand()*1.0/RAND_MAX;
  51                 c.g = rand()*1.0/RAND_MAX;
  52                 c.b = rand()*1.0/RAND_MAX;
  53                 float high = max(max(c.r, c.g), c.b);
  54                 c = c*(1.0/high);
  55                 if(registered)
  56                 {
  57                         float low = min(min(c.r, c.g), c.b);
  58                         c = (c+-low)*(1/(1-low));
  59                 }
  60                 else
  61                         c = c*0.6+0.4;
  62
  63                 float score = 2;
  64                 for(map<unsigned, Port *>::const_iterator j=ports.begin(); j!=ports.end(); ++j)
  65                 {
  66                         if(registered && !j->second->is_registered())
  67                                 break;
  68                         const GL::Color &other = j->second->get_color();
  69                         float dr = c.r-other.r;
  70                         float dg = c.g-other.g;
  71                         float db = c.b-other.b;
  72                         score = min(score, dr*dr+dg*dg+db*db);
  73                 }
  74                 if(score>best_score)
  75                 {
  76                         best_score = score;
  77                         color = c;
  78                 }
  79         }
  80         color.a = 0.4f;
  81
  82         GL::MeshBuilder bld(mesh);
  83         bld.begin(GL::QUADS);
  84         bld.color(color.r, color.g, color.b, color.a);
  85         for(unsigned x=0; x<=4; x+=2)
  86         {
  87                 bld.vertex(x+0, 0);
  88                 bld.vertex(x+10, 0);
  89                 bld.vertex(x+10, 10);
  90                 bld.vertex(x+0, 10);
  91         }
  92         bld.end();
  93 }
  94
  95 void Port::render() const
  96 {
  97         GL::PushMatrix push_;
  98         mesh.draw();
  99         GL::translate(16, 1, 0);
 100         GL::scale_uniform(10);
 101         GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
 102         netvis.get_font().draw_string(name, imm);
 103         GL::Texture::unbind();
 104 }