source/libmarklin/profile.cpp

   1 /* $Id$
   2
   3 This file is part of the MSP Märklin suite
   4 Copyright © 2010 Mikkosoft Productions, Mikko Rasa
   5 Distributed under the GPL
   6 */
   7
   8 #include <cmath>
   9 #include "profile.h"
  10
  11 using namespace std;
  12 using namespace Msp;
  13
  14 namespace Marklin {
  15
  16 const Point &Profile::get_point(unsigned i) const
  17 {
  18         if(i>=points.size())
  19                 throw InvalidParameterValue("Index out of range");
  20         return points[i];
  21 }
  22
  23 Point Profile::get_edge_normal(unsigned i) const
  24 {
  25         if(i+1>=points.size())
  26                 throw InvalidParameterValue("Index out of range");
  27         float dx = points[i+1].x-points[i].x;
  28         float dy = points[i+1].y-points[i].y;
  29         float len = sqrt(dx*dx+dy*dy);
  30         return Point(-dx/len, dy/len);
  31 }
  32
  33
  34 Profile::Loader::Loader(Profile &p):
  35         DataFile::ObjectLoader<Profile>(p)
  36 {
  37         add("point", &Loader::point);
  38 }
  39
  40 void Profile::Loader::finish()
  41 {
  42         obj.min_coords = obj.points[0];
  43         obj.max_coords = obj.points[0];
  44         for(unsigned i=1; i<obj.points.size(); ++i)
  45         {
  46                 obj.min_coords.x = min(obj.min_coords.x, obj.points[i].x);
  47                 obj.min_coords.y = min(obj.min_coords.y, obj.points[i].y);
  48                 obj.max_coords.x = max(obj.max_coords.x, obj.points[i].x);
  49                 obj.max_coords.y = max(obj.max_coords.y, obj.points[i].y);
  50         }
  51 }
  52
  53 void Profile::Loader::point(float x, float y)
  54 {
  55         obj.points.push_back(Point(x/1000, y/1000));
  56 }
  57
  58 } // namespace Marklin