triangles/trianglescene.cpp at master · gh2k/triangles · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
#include "trianglescene.h"

#include <QPainter>
#include <QPicture>
#include <QImage>
#include <QSvgGenerator>
#include "randomiser.h"

TriangleScene::TriangleScene( int polyCount, int width, int height, const QColor &backgroundColor )
  :AbstractScene(), m_polys( polyCount )
{
  for( int i = 0; i < polyCount; ++ i )
    m_polys[i] = new Poly( width, height );
  m_width = width;
  m_height = height;
  m_backgroundColor = backgroundColor;
}

TriangleScene::TriangleScene( const TriangleScene &s )
  :AbstractScene( s ), m_polys( s.m_polys.size() )
{
  for( int i = 0; i < m_polys.size(); ++ i )
    m_polys[i] = new Poly( *s.m_polys[i] );
  m_width = s.m_width;
  m_height = s.m_height;
  m_backgroundColor = s.m_backgroundColor;
}

TriangleScene::~TriangleScene()
{
  for( int i = 0; i < m_polys.size(); ++ i )
    delete m_polys[i];
}

void TriangleScene::randomise()
{
  for( int i = 0; i < m_polys.size(); ++ i )
  {
    delete m_polys[i];
    m_polys[i] = new Poly( m_width, m_height );
  }
}

void TriangleScene::mutateOnce()
{
  // loop until mutationStrenth says we should stop

  // randomly select a triangle to modify
  int p = Randomiser::randomInt( m_polys.size() );
  // randomly select the type of modification
  int type = Randomiser::randomInt( Poly::Randomize );

  // if we're swapping z order, move to a different position in the list
  if ( type < Poly::SwapZ )
  {
    int other = Randomiser::randomInt( m_polys.size() );
    Poly *o = m_polys[other];
    m_polys[other] = m_polys[p];
    m_polys[p] = o;
  }
  else
  {
    // otherwise mutate the triangle
    m_polys[p]->mutate( (Poly::MutationType) type );
  }
}

bool TriangleScene::renderTo( QImage &image )
{
  QPainter painter( &image );
  painter.fillRect( 0, 0, m_width, m_height, m_backgroundColor );
  drawTo( painter );

  return true;
}

void TriangleScene::drawTo( QPicture &picture )
{
  QPainter painter( &picture );
  drawTo( painter );
}

void TriangleScene::drawTo( QPainter &painter )
{
  painter.setPen( Qt::NoPen );

  for( int t = 0; t < m_polys.size(); ++ t )
  {
    m_polys[t]->renderTo( painter );
  }
}

AbstractScene *TriangleScene::clone() const
{
  TriangleScene *ts = new TriangleScene( *this );

  return ts;
}

QPair< AbstractScene*, AbstractScene* > TriangleScene::breed( AbstractScene *other, int mutationStrength )
{
  // create two new scenes from this and one other, merging data from the two and
  // mutating some parameters

  TriangleScene *left = new TriangleScene( 0, m_width, m_height, m_backgroundColor );
  TriangleScene *right = new TriangleScene( 0, m_width, m_height, m_backgroundColor );

  left->m_polys.resize( m_polys.size() );
  right->m_polys.resize( m_polys.size() );

  for( int i = 0; i < m_polys.size(); ++ i )
  {
    left->m_polys[i] = new Poly( m_width, m_height );
    right->m_polys[i] = new Poly( m_width, m_height );
    Poly::uniformCrossover( left->m_polys[i], right->m_polys[i], m_polys[i], dynamic_cast< TriangleScene* > ( other )->m_polys[i] );
  }

  left->mutate( mutationStrength );
  right->mutate( mutationStrength );

  return qMakePair< AbstractScene*, AbstractScene* > ( left, right );
}

void TriangleScene::saveToFile( const QString &fn )
{
  QSvgGenerator gen;
  gen.setFileName( fn );
  gen.setSize( QSize( m_width, m_height ) );
  gen.setViewBox( QRect( QPoint( 0, 0 ), QSize( m_width, m_height ) ) );
  QPainter svgPainter( &gen );
  drawTo( svgPainter );
}

void TriangleScene::saveToStream ( QDataStream &ds )
{
  ds << m_backgroundColor;
  ds << m_width;
  ds << m_height;
  ds << fitness();
  for( int i = 0; i < m_polys.size(); ++ i )
    ds << *m_polys[i];
}

void TriangleScene::loadFromStream ( QDataStream &ds )
{
  ds >> m_backgroundColor;
  ds >> m_width;
  ds >> m_height;
  double f;
  ds >> f;
  setFitness( f );
  for( int i = 0; i < m_polys.size(); ++ i )
    ds >> *m_polys[i];
}