This repository has been archived by the owner on Jun 1, 2021. It is now read-only.
/
drawfractal.cpp
159 lines (118 loc) · 2.95 KB
/
drawfractal.cpp
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
#include "drawfractal.h"
DrawFractal::DrawFractal()
{
}
string DrawFractal::GetFS(vector<G> Gs,string iniF, int ITER_TIMES)
{
int gsize = Gs.size();
string F = iniF;
for(int i = 0;i < ITER_TIMES;i++)
{
string tmp = "";
int size = F.size();
for(int j = 0;j < size;j++)
for(int g = 0;g < gsize;g++)
if(Gs[g].w == F[j])
tmp += Gs[g].val;
else
tmp += F[j];
F = tmp;
}
return F;
}
QPixmap DrawFractal::Draw_LS(int w,int h,string F,QPointF start,int len,float ini_angle,float angle)
{
QPixmap pixmap(w,h);
pixmap.fill();
QPainter painter(&pixmap);
QPen pen; //»±Ê
pen.setColor(QColor(255,0,0));
painter.setPen(pen); //Ìí¼Ó»±Ê
Node cur;
cur.angle = ini_angle;
cur.p = start;
Node next;
stack<Node> S;
int size = F.size();
for(int i = 0;i < size;i++)
{
switch(F[i])
{
case 'F':
{
next.p.setX( cur.p.x() + len * cos( cur.angle ) );
next.p.setY( cur.p.y() + len * sin( cur.angle ) );
next.angle = cur.angle;
painter.drawLine(start,next.p);
start = next.p;
cur = next;
//cvShowImage("Fractal",fractal);
//cvWaitKey(10);
break;
}
case '+':
{
cur.angle += angle;
break;
}
case '-':
{
cur.angle -= angle;
break;
}
case '[':
{
S.push(cur);
break;
}
case ']':
{
cur = S.top();
S.pop();
start = cur.p;
break;
}
}
}
QImage img = pixmap.toImage();
img = img.mirrored();
return QPixmap::fromImage(img);
}
QPixmap DrawFractal::Draw_IFS(int w, int h, float x, float y, float cx, float cy)
{
QPixmap pixmap(w,h);
pixmap.fill();
QPainter painter(&pixmap);
QPen pen; //»±Ê
pen.setColor(QColor(255,0,0));
painter.setPen(pen); //Ìí¼Ó»±Ê
for(int i = 0;i < 1000;i++)
{
int m = (x + 2.0) * w / 4.0;
int n = (y + 1.0) * h / 2.0;
qDebug() << m << n;
painter.drawPoint(m ,n);
//painter.drawRect(m - 3,n - 3,m + 3,n + 3);
float wx = x - cx;
float wy = y - cy;
float theta;
if( wx > 0 )
theta = atan( wy / wx );
if( wx < 0 )
theta = atan( wy / wx ) + PI;
if( wx == 0 )
theta = PI / 2;
theta /= 2.0;
float r = sqrt( wx * wx + wy * wy);
float k = rand() % 100000 / 100000.0;
if( k < 0.5 )
r = sqrt( r );
else
r = -sqrt( r );
x = r * cos( theta );
y = r * sin( theta );
}
QImage img = pixmap.toImage();
img = img.mirrored();
return QPixmap::fromImage(img);//.scaled(w,h);
}