1. 1)draw coordinate axis at centre of screen
2. #include<graphics.h>
3. #include<conio.h>
4. void main()
5. {
6. int gd=DETECT,gm,xcen,ycen;
7. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
8. xcen=getmaxx()/2;
9. ycen=getmaxy()/2;
10. line(xcen,0,xcen,getmaxy());
11. line(0,ycen,getmaxx(),ycen);
12. getch();
13. closegraph();
14. }
15.  
16. 2)
17. a. Develop the program for DDA Line drawing algorithm.
18. CODE:
19. #include<stdio.h>
20. #include<conio.h>
21. #include<graphics.h>
22. #include<math.h>
23. #include<dos.h>
24. void main()
25. {
26. int gd=DETECT,gm;
27. float x1,y1,x2,y2,i,dx,dy,m;
28. printf("\nEnter the x1 and y1 coordinate: ");
29. scanf("%f%f",&x1;,&y1;);
30. printf("\nEnter the x2 and y2 coordinate: ");
31. scanf("%f%f",&x2;,&y2;);
32. m=(y2-y1)/(x2-x1);
33. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
34. for(i=x1;i<=x2;i++)
35. {
36. if(m<1)
37. {
38. dx=x1+1;
39. dy=y1+m;
40. }
41. else if(m>1)
42. {
43.  
44. }
45. else
46. {
47.  
48. }
49. dx=x1+(1/m);
50. dy=y1+1;
51.  
52. dx=x1+1;
53. dy=y1+1;
54.  
55. abs(dx);
56. abs(dy);
57. putpixel(dx,dy,15);
58. x1=dx;
59. y1=dy;
60. delay(50);
61. }
62. outtextxy(x2,y2,"DDA LINE");
63. getch();
64. closegraph();}
65.  
66. 3)
67. 5A WRITE A PROGRAM TO IMPLEMENT 2D SCALING
68. A1 WRITE A PROGRAM TO SCALE 2D LINE
69. CODE:
70. #include<conio.h>
71. #include<stdio.h>
72. #include<graphics.h>
73. void main()
74. {
75. float x1,x2,y1,y2,sx,sy;
76. int gd=DETECT,gm;
77. printf("\nEnter Start Cooridinate (x1,y1): ");
78. scanf("%f%f",&x1;,&y1;);
79. printf("\nEnter the End Cooridinate(x2,y2): ");
80. scanf("%f%f",&x2;,&y2;);
81.  
82. printf("'\nEnter Scaling Parmeters: ");
83. scanf("%f%f",&sx;,&sy;);
84. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
85. line(x1,y2,x2,y2);
86. outtextxy(x1,y1,"Line Before Scaling");
87. x1=x1*sx;
88. y1=y1*sy;
89. x2=x2*sx;
90. y2=y2*sy;
91. line(x1,y1,x2,y2);
92. outtextxy(x1,y1,"Line After Scaling");
93. getch();
94. closegraph();
95. }
96.  
97. 4)
98. A)Develop a simple text screen saver using graphics functions.
99. #include <stdio.h>
100. #include <stdlib.h>
101. #include <graphics.h>
102. #include <conio.h>
103. #include <dos.h>
104. void main()
105. {
106. int
107. gdriver=DETECT,gmode,col=480,row=640,font=4,direction=2,size=8,col
108. or=15;
109. initgraph(&gdriver;,&gmode;,"C:\\TurboC3\\BGI");
110. cleardevice();
111. while(!kbhit()){
112. settextstyle(random(font),random(direction),random(size));
113. setcolor(random(color));
114. outtextxy(random(col),random(row),"Komal");
115. delay(250);
116. }
117. closegraph();
118. }
119.  
120. 5)
121. B. Draw a simple hut on the screen.
122.  
123. CODE:
124. #include<graphics.h>
125. #include<conio.h>
126. void main()
127. {
128. int gd=DETECT, gm;
129. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
130. rectangle(150,180,250,300);
131. rectangle(250,180,420,300);
132. rectangle(180,250,220,300);
133. line(200,100,150,180);
134. line(200,100,250,180);
135. line(200,100,370,100);
136. line(370,100,420,180);
137. getch();
138. closegraph();
139. }
140.  
141. 6)
142. A. Divide your screen into four region, draw circle, rectangle, ellipse and
143. half ellipse in each region
144.  
145. CODE:
146. #include<graphics.h>
147. #include<conio.h>
148. void main()
149. {
150. int gd=DETECT,gm,xcen,ycen;
151. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
152. xcen=getmaxx()/2;
153. ycen=getmaxy()/2;
154. line(xcen,0,xcen,getmaxy());
155. line(0,ycen,getmaxx(),ycen);
156. rectangle(xcen+50,ycen-200,xcen+200,ycen-50);
157. ellipse(xcen-xcen/2,ycen+ycen/2,0,360,100,50);
158. ellipse(xcen+xcen/2,ycen+ycen/2,0,180,100,50);
159. getch();
160. closegraph();
161. }
162. 7)
163. B) Perform smiling face animation using graphic functions.
164. #include<stdio.h>
165. #include<conio.h>
166. #include<graphics.h>
167. #include<stdlib.h>
168. void main()
169. {
170. int gd=DETECT,gm,x=250,y=250;
171. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
172. cleardevice();
173. while(!kbhit())
174. {
175. setfillstyle(SOLID_FILL,14);
176. fillellipse(x,y,100,100);
177. setfillstyle(SOLID_FILL,random(6));
178. fillellipse(x-30,y-30,20,40);
179. fillellipse(x+30,y-30,20,40);
180. setcolor(random(3));
181. ellipse(x,y+10,180,0,60,50);
182. delay(500);
183. }
184. closegraph();
185. }
186.  
187. 8)
188. 5B: WRITE A PROGRAM TO IMPLEMENT 2D Translation
189. B1 WRITE A PROGRAM TO IMPLEMENT 2D Translation on a line
190. CODE:
191. #include<stdio.h>
192. #include<conio.h>
193. #include<graphics.h>
194. void main()
195. {
196. int gd=DETECT,gm;
197. float Tx,Ty,x1,y1,x2,y2;
198. printf("Enterthe coordinates(x1,y1):");
199.  
200. SYIT CGA Practical
201.  
202. Komal Jambhale 6
203. scanf("%f%f",&x1;,&y1;);
204. printf("Enterthe second coordinations(x1,y2)");
205. scanf("%f%f",&x2;,&y2;);
206. printf("Enterthe translation parameter(Tx,Ty)");
207. scanf("%f%f",&Tx;,&Ty;);
208. initgraph(&gd;,&gm;,"C:\\TC\\BGI");
209. line(x1,y1,x2,y2);
210. outtextxy(x1,y1,"Before Translation");
211. x1=x1+Tx;
212. y1=y1+Ty;
213. x2=y2+Tx;
214. y2=y2+Ty;
215. line(x1,y1,x2,y2);
216. outtextxy(x2,y2,"After Translation");
217. getch();
218. closegraph();
219. }
220.  
221.  
222.