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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
| //---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include<conio.h>
#include<graphics.hpp>
#include<math.h>
#include<process.h>
#include<stdio.h>
#include<stdlib.h>
#include<dos.h>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
#define NO_VALUE -777
#define MAXX 640
#define MAXY 480
int YMax[MAXX];
int YMin[MAXX];
int Psi, Phi, Dx, Dy;
struct _Point
{
int x;
int y;
};
int UpColor = 9;
int DownColor = 15;
double f(double x, double y) //функция конуса
{
double r = x*x/225 + y*y/64;
return sqrt(r);
}
void DrawLine (_Point &p1, _Point &p2) {/*рисует сегменты ломаной, используя модифицированный алгоритм Брезенхейма*/
int dx = abs (p2.x - p1.x);
int dy = abs (p2.y - p1.y);
int sx = p2.x >= p1.x ? 1 : -1;
int sy = p2.y >= p1.y ? 1 : -1;
if (dy <= dx){
int d = -dx;
int d1 = dy << 1;
int d2 = (dy - dx) << 1;
for (int x=p1.x, y=p1.y, i=0; i<=dx; i++, x+=sx)
{
if (YMin[x] == NO_VALUE){
SetPixel(Form1->Canvas->Handle,x,y,UpColor);
YMin[x] = YMax[x] = y;
}
else if (y < YMin[x]){
SetPixel(Form1->Canvas->Handle,x,y,UpColor);
YMin[x] = y;
}
else if (y > YMax[x]){
SetPixel(Form1->Canvas->Handle,x,y,DownColor);
YMax[x] = y;
}
if (d > 0){
d += d2;
y += sy;
}
else d += d1;
}
}
else
{
int d = -dy;
int d1 = dx << 1;
int d2 = ( dx - dy ) << 1;
int m1 = YMin[p1.x];
int m2 = YMax[p1.x];
for (int x=p1.x, y=p1.y, i=0; i<=dy; i++, y+=sy)
{
if (YMin[x] == NO_VALUE) {
SetPixel(Form1->Canvas->Handle,x,y,UpColor);
YMin[x] = YMax[x] = y;
}
else if (y < m1){
SetPixel(Form1->Canvas->Handle,x,y,UpColor);
if (y < YMin[x])
YMin[x] = y;
}
else if (y > m2){
SetPixel(Form1->Canvas->Handle,x,y,DownColor);
if (y > YMax[x])
YMax[x] = y;
}
if (d > 0){
d+=d2;
x+=sx;
m1 = YMin[x]; m2 = YMax [x];
}
else d+=d1;
}
}
}
void PlotSurface( double x1, double y1, double x2, double y2,
double fmin, double fmax, int n1, int n2)/*n1 - количество точек по Х, которые делят линию на сегменты; n2 - количество линий*/
{
_Point *CurLine = new _Point [n1];
double phi = Phi*3.1415926/180;
double psi = Psi*3.1415926/180;
double sphi = sin(phi);
double spsi = sin(psi);
double cphi = cos(phi);
double cpsi = cos(psi);
double e1 [] = { cphi, sphi, 0 };
double e2 [] = { spsi * sphi, -spsi * cphi, cpsi };
double x,y;
double hx = (x2 - x1)/n1;
double hy = (y2 - y1)/n2;
double xmin = (e1[0] >= 0 ? x1 : x2)*e1[0] +
(e1[1] >= 0 ? y1 : y2)*e1[1];
double xmax = (e1[0] >= 0 ? x2 : x1)*e1[0] +
(e1[1] >= 0 ? y2 : y1)*e1[1];
double ymin = (e2[0] >= 0 ? x1 : x2)*e2[0] +
(e2[1] >= 0 ? y1 : y2)*e2[1];
double ymax = (e2[0] >= 0 ? x2 : x1)*e2[0] +
(e2[1] >= 0 ? y2 : y1)*e2[1];
int i, j, k;
if ( e2[2] >= 0 ){
ymin += fmin*e2[2];
ymax += fmax*e2[2];
}
else {
ymin += fmax*e2[2];
ymax += fmin*e2[2];
}
double ax = Dx-(MAXX - 40)*xmin/(xmax - xmin);
double bx = (MAXX - 40)/(xmax - xmin);
double ay = Dy-(MAXY - 80)*ymin/(ymax - ymin);
double by = -(MAXY - 80)/(ymax - ymin);
for ( i=0; i<sizeof(YMax)/sizeof(int); i++)
YMin[i] = YMax[i] = NO_VALUE;
for ( i=n2-1; i>-1; i--){
for (j=0; j<n1; j++){
x = x1 + j*hx;
y = y1 + i*hy;
CurLine[j].x = (int)(ax + bx*(x*e1[0] + y*e1[1]));
CurLine[j].y = (int)(ay + by*(x*e2[0] + y*e2[1] +
f(x,y) * e2[2]));
}
for (j=0; j<n1-1; j++)
DrawLine(CurLine[j], CurLine[j+1]);
}
delete []CurLine;
}
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
//int dr = DETECT, md;
//int res;
//initgraph ( &dr, &md, "");
Psi = 3;
Phi = 320; //угол поворота
Dx = 20; //расположение по x
Dy = 180; //по y
PlotSurface(-5,-5,5,5,-0.2,0.3,1000,100 );
getch();
//closegraph();
}
//--------------------------------------------------------------------------- |
(
DevC++ (есть RAD STUDIO но для
Сообщение от MrCold
Сообщение было отмечено как решение
