forked from keerthan657/CGVR-lab-programs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
prog11.c
135 lines (109 loc) · 2.95 KB
/
prog11.c
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
/*
Write a program to create a house like figure and perform the following operations.
i. Rotate it about a given fixed point using OpenGL transformation functions.
ii. Reflect it about an axis y=mx+c using OpenGL transformation functions.
*/
#include<stdio.h>
#include<math.h>
#include<GL/glut.h>
#define WIDTH 500
#define HEIGHT 500
#define R2D 180.0/3.14
struct point {
int x,y;
};
struct point points[20];
int n;
int m,c;
int wid1, wid2;
void display1()
{
glutSetWindow(wid1);
// draw house figure
glColor3f(1,0,0);
glBegin(GL_LINE_LOOP);
for(int i=0; i<n; i++)
glVertex2f(points[i].x, points[i].y);
glEnd();
// do rotation - rotate 20 deg about (100,100)
glPushMatrix();
glTranslatef(100,100,0);
glRotatef(20,0,0,1);
glTranslatef(-100,-100,0);
glColor3f(0,0,1);
glBegin(GL_LINE_LOOP);
for(int i=0; i<n; i++)
glVertex2f(points[i].x, points[i].y);
glEnd();
glPopMatrix();
glFlush();
}
void display2()
{
glutSetWindow(wid2);
// draw house figure
glColor3f(1,0,0);
glBegin(GL_LINE_LOOP);
for(int i=0; i<n; i++)
glVertex2f(points[i].x, points[i].y);
glEnd();
// draw line
glColor3f(0,0,0);
glBegin(GL_LINES);
glVertex2f(0, m*0+c);
glVertex2f(500, m*500+c);
glEnd();
// do reflection - about line y=mx+c
glPushMatrix();
glTranslatef(0,c,0);
glRotatef(atan(m)*R2D, 0, 0, 1);
glScalef(1,-1,1);
glRotatef(-atan(m)*R2D, 0, 0, 1);
glTranslatef(0,-c,0);
glColor3f(0,0,1);
glBegin(GL_LINE_LOOP);
for(int i=0; i<n; i++)
glVertex2f(points[i].x, points[i].y);
glEnd();
glPopMatrix();
glFlush();
}
void myInit()
{
// set background
glClearColor(1,1,1,1);
glClear(GL_COLOR_BUFFER_BIT);
// set camera
gluOrtho2D(0,WIDTH,0,HEIGHT);
}
int main(int argc, char *argv[])
{
// printf("\nEnter slope and intercept values");
// scanf("%d%d", &m, &c);
m = 1;
c = 0;
n = 10;
points[0].x = 100; points[0].y = 100;
points[1].x = 300; points[1].y = 100;
points[2].x = 300; points[2].y = 300;
points[3].x = 200; points[3].y = 350;
points[4].x = 100; points[4].y = 300;
points[5].x = 100; points[5].y = 100;
points[6].x = 220; points[6].y = 100;
points[7].x = 220; points[7].y = 140;
points[8].x = 180; points[8].y = 140;
points[9].x = 180; points[9].y = 100;
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(WIDTH, HEIGHT);
wid1 = glutCreateWindow("House rotation");
glutDisplayFunc(display1);
myInit();
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(WIDTH, HEIGHT);
wid2 = glutCreateWindow("House reflection");
glutDisplayFunc(display2);
myInit();
glutMainLoop();
return 0;
}