Rotation Of Triangle

This Project on Rotation Of Triangle is submitted by Anmol Sharma(BCET GSP)

#include<stdio.h>
#include<iostream.h>
#include<dos.h>
#include<process.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>

//void render(float,float,float, float,float,float,
float,float,float,float,float,float);
void initialize(void);
void firstpage(void);
void call_first(void);
float intensity,alpha,thita,tempy,tempz,tempx;
char ch=’4′;
char ch1=’1′;
char ch2=’1′;
int pts1[5][3];
float tx,ty,tz,d=.5;
void assign(float,float,float,float,float,float,float,float,float);
void scan_line(float,float,float,float,float,float,float,float,float);
void drawpyramid(float,float,float,float,float,float);
void call_assign(void);
void display(void);
void tranform(void);
void draw(void);
void drawscale(void);
float pts[5][3]={-100,0,0, 0,0,45, 100,0,0, 0,0,-45, 0,130,0};
float pts2[5][3]={228,273,0, 305,295,0, 428,273,0, 350,250,0
,328,143,0};
float pt[5][3]={-100,0,0, 0,0,45,100,0,0,0,0-45,0,130,0};

void main()
{
int i;
float sx,sy,sz=1;
struct palettetype pal;
int gd,gm;
detectgraph(&gd,&gm);
initgraph(&gd,&gm,”c:\tc\bgi”);
getpalette(&pal);
firstpage();
for(i=16;i>0;i–)
setrgbpalette(pal.colors[i],0,4*i,0);

L1: display();

while(ch1!=’4′)
{
ch=’2′;
L2:    call_assign();
clearviewport();
gotoxy(1,2);
cout<<”1. Translation”;
cout<<”2. Rotation”;
cout<<”3. Scaling “;
cout<<”4. Back   “;
ch1=getch();
if(ch1==’4′)
{
clearviewport();
goto L1;
}

if(ch1==’1′)
{
clearviewport();
while(ch1!=’4′)
{
gotoxy(2,2);
cout<<”a. X+”;  cout<<” b. X-”;
cout<<” c. Y+”; cout<<” d. Y- “;
cout<<” e. Z+”; cout<<” f. Z-”;
cout<<” g. Back”;
call_assign();
ch1=getch();
clearviewport();
if(ch1==’g')
goto L2;
if(ch1==’a')
tx=5;
if(ch1==’b')
tx=-5;
if(ch1==’c')
ty=5;
if(ch1==’d')
ty=-5;
if(ch1==’e')
tz=10;
if(ch1==’f')
tz=-10;

for(i=0;i<5;i++)
{
pts[i][0]+=tx;
pts[i][1]+=ty;
pts[i][1]+=tz;
}
}
}
if(ch1==’3′)
{
clearviewport();
cout<<”Enter sx:”;
cin>>sx;
cout<<”Enter sy:”;
cin>>sy;
for(i=0;i<5;i++)
{
pts2[i][0]=abs(pts2[i][0]*sx+200*(1-sx));
pts2[i][1]=abs(pts2[i][1]*sy+200*(1-sy));
}
drawscale();
getch();
}

if(ch1==’2′)
{
while(ch2!=’4′)
{
clearviewport();
gotoxy(1,2);
cout<<”1.X-axis rotation”;
gotoxy(1,3);
cout<<”2.Y-axis rotation”;
gotoxy(1,4);
cout<<”3.Z-axis rotation”;
gotoxy(1,5);
cout<<”4.Back”;
ch2=getch();
if(ch2==’4′)
break;
if(ch2==’1′)
{
alpha=0;
while(alpha<360)
{
alpha=alpha+10;
thita=(alpha*3.142)/180;
initialize();
for(i=0;i<5;i++)
{

tempy=(pts1[i][1]*cos(thita)+pts1[i][2]*sin(thita));

pts1[i][2]=(pts1[i][1]*sin(thita)-pts1[i][2]*cos(thita));
pts1[i][1]=tempy;
}
clearviewport();
draw();
delay(100);
}
}

if(ch2==’2′)
{
alpha=0;
while(alpha<360)
{
alpha=alpha+10;
thita=(alpha*3.142)/180;
initialize();
for(i=0;i<5;i++)
{

tempz=(pts1[i][2]*cos(thita)+pts1[i][0]*sin(thita));

pts1[i][0]=(pts1[i][2]*sin(thita)-pts1[i][0]*cos(thita));
pts1[i][2]=tempz;
}
clearviewport();
draw();
delay(100);
}
}

if(ch2==’3′)
{
alpha=0;
while(alpha<360)
{
alpha=alpha+10;

thita=(alpha*3.142)/180;
initialize();
for(i=0;i<5;i++)
{

tempx=(pts1[i][0]*cos(thita)-pts1[i][1]*sin(thita));

pts1[i][1]=(pts1[i][0]*sin(thita)+pts1[i][1]*cos(thita));
pts1[i][0]=tempx;
}
clearviewport();
draw();
delay(100);
clearviewport();
draw();
}
}

}
}
}
closegraph();
restorecrtmode();
}
void initialize()
{
pts1[0][0]=-100;
pts1[0][1]=-65;
pts1[0][2]=0;
pts1[1][0]=0;
pts1[1][1]=-65;
pts1[1][2]=-45;
pts1[2][0]=100;
pts1[2][1]=-65;
pts1[2][2]=0;
pts1[3][0]=0;
pts1[3][1]=-65;
pts1[3][2]=45;
pts1[4][0]=0;
pts1[4][1]=65;
pts1[4][2]=0;

}

void firstpage()
{
clearviewport();
setcolor(WHITE);
settextstyle(2,HORIZ_DIR,5);
outtextxy(250,15,”A Project on”);
setcolor(GREEN);
settextstyle(3,HORIZ_DIR,4);
outtextxy(170,25,”PYRAMID MODELING”);
rectangle(300,120,580,320);
rectangle(295,115,585,325);
setcolor(6);
settextstyle(4,HORIZ_DIR,3);
outtextxy(50,100, “OPTIONS”);
settextstyle(3,HORIZ_DIR,1);
setcolor(11);
outtextxy(20,150,”1. VISIBLE SURFACE DETECTION”);
outtextxy(20,190,”2. SURFACE RENDERING”);
outtextxy(20,230,”3. TRANSFORMATIONS”);
outtextxy(20,270,”4. WIREFRAME DISPLAY”);
outtextxy(20,310,”5. EXIT”);
settextstyle(2,HORIZ_DIR,4);
outtextxy(400,370,”Group Memebers”);
setcolor(YELLOW);
outtextxy(410,385,”Made By Niket Shah”);

call_first();
//display();
setcolor(WHITE);
getch();
cleardevice();
clearviewport();

}

void display(void)
{ while(ch!=’3′)
{   clearviewport();
gotoxy(2,2);
cout<<”1. Visible Surface Detection “;
gotoxy(2,3);
cout<<”2. Surface Rendering”;
gotoxy(2,4);
cout<<”3. Transformations”;
gotoxy(2,5);
cout<<”4. Wireframe Display”;
gotoxy(2,6);
cout<<”5. Exit             “;
call_assign();
ch=getch();
if(ch==’5′)
exit(0);
clearviewport();
if(ch==’3′)
break;
}
}
void call_assign(void)
{
assign(pts[0][0],pts[0][1],pts[0][2],pts[1][0],pts[1][1],pts[1][2],pts[4][
0],pts[4][1],pts[4][2]);

assign(pts[1][0],pts[1][1],pts[1][2],pts[2][0],pts[2][1],pts[2][2],pts[4][
0],pts[4][1],pts[4][2]);

assign(pts[2][0],pts[2][1],pts[2][2],pts[3][0],pts[3][1],pts[3][2],pts[4][
0],pts[4][1],pts[4][2]);

assign(pts[0][0],pts[0][1],pts[0][2],pts[4][0],pts[4][1],pts[4][2],pts[3][
0],pts[3][1],pts[3][2]);
}
void call_first(void)
{
assign(pt[0][0],pt[0][1],pt[0][2],pt[1][0],pt[1][1],pt[1][2],pt[4][0],pt[4
][1],pt[4][2]);

assign(pt[1][0],pt[1][1],pt[1][2],pt[2][0],pt[2][1],pt[2][2],pt[4][0],pt[4
][1],pt[4][2]);

assign(pt[2][0],pt[2][1],pt[2][2],pt[3][0],pt[3][1],pt[3][2],pt[4][0],pt[4
][1],pt[4][2]);

assign(pt[0][0],pt[0][1],pt[0][2],pt[4][0],pt[4][1],pt[4][2],pt[3][0],pt[3
][1],pt[3][2]);
}

void drawpyramid(float x1,float y1,float x2,float y2,float x3,float y3)
{
line(x1,y1,x2,y2);
line(x2,y2,x3,y3);
line(x3,y3,x1,y1);
}

void assign(float x1,float y1,float z1,float x2,float y2,float z2,float
x3,float y3,float z3)
{
float A,B,C;
float temp,An,Bn,Cn,X,Y,Z;
float Xl=-6,Yl=10,Zl=50;
float templ;

A=y1*(z2-z3)+y2*(z3-z1)+y3*(z1-z2);
B=z1*(x2-x3)+z2*(x3-x1)+z3*(x1-x2);
C=x1*(y2-y3)+x2*(y3-y1)+x3*(y1-y2);

temp=sqrt(A*A+B*B+C*C);
templ=sqrt(Xl*Xl+Yl*Yl+Zl*Zl);

X=(float)Xl/templ; Y=(float)Yl/templ; Z=(float)Zl/templ;
An=(A/temp); Bn=(float)B/temp; Cn=(float)C/temp;

intensity=15*(An*X+Bn*Y+Cn*Z);

if (intensity<0)
intensity=0;
if (intensity>15)
intensity=15;

z1=55-z1;
x1=x1+300+(d*z1); y1=300-y1-(d*z1);
z2=55-z2;
x2=x2+300+(d*z2); y2=300-y2-(d*z2);
z3=55-z3;
x3=x3+300+(d*z3); y3=300-y3-(d*z3);

if(ch==’1′)
{  if(intensity==0)  return;
drawpyramid(x1,y1,x2,y2,x3,y3);
return;
}
if(ch==’3′)
exit(0);

if(ch==’4′)
drawpyramid(x1,y1,x2,y2,x3,y3);

if(ch==’2′)
{
if(intensity==0)  return;
if ((y1>y2) && (y1>y3) && (y2>y3))
scan_line(x1,y1,z1,x2,y2,z2,x3,y3,z3);

if ((y1>y2) && (y1>y3) && (y3>y2))
scan_line(x1,y1,z1,x3,y3,z3,x2,y2,z2);

if ((y2>y1) && (y2>y3) && (y1>y3))
scan_line(x2,y2,z2,x1,y1,z1,x3,y3,z3);

if ((y2>y1) && (y2>y3) && (y3>y1))
scan_line(x2,y2,z2,x3,y3,z3,x1,y1,z1);

if ((y3>y1) && (y3>y2) && (y1>y2))
scan_line(x3,y3,z3,x1,y1,z1,x2,y2,z2);

if ((y3>y1) && (y3>y2) && (y2>y1))
scan_line(x3,y3,z3,x2,y2,z2,x1,y1,z1);
}
}

void scan_line(float x1,float y1,float z1,float x2,float y2,float
z2,float
x3,float y3,float z3)
{
int i;
float tempx,tempx1,tempy;
float m1,m2,thita,alpha;
alpha=0;

tempx=x1; tempx1=x1; tempy=y1;
m1=(y2-y1)/(x2-x1);
m2=(y3-y1)/(x3-x1);

while((int)tempy!=(int)y2)
{ alpha=alpha+5;
thita=(alpha*3.14/180);
tempx=tempx-1/m1;
tempx1=tempx1-1/m2;
if(tempx<tempx1)
{
for(i=0;i+tempx<=tempx1;i++)
{
putpixel(tempx+i,tempy,intensity);
}
}
else
if (tempx1<tempx)
{ for(i=0;i+tempx1<=tempx;i++)
{
putpixel(tempx1+i,tempy,intensity);
}
}
tempy–;
}

m1=(float)(y3-y2)/(x3-x2);

while((int)tempy!=(int)y3)
{
tempx=tempx-1/m1;
tempx1=tempx1-1/m2;
if(tempx<tempx1)
{
for(i=0;i+tempx<=tempx1;i++)
putpixel(tempx+i,tempy,intensity);
}
else
{
for(i=0;i+tempx1<=tempx;i++)
putpixel(tempx1+i,tempy,intensity);
}
tempy–;
}
}

void draw()
{   int i;
for(i=0;i<5;i++)
{
pts1[i][2]=50+pts1[i][2]+50;
pts1[i][0]=pts1[i][0]+300+.5*pts1[i][2];
pts1[i][1]=200+65-pts1[i][1]-.5*pts1[i][2];
}
line(pts1[0][0],pts1[0][1],pts1[1][0],pts1[1][1]);
line(pts1[1][0],pts1[1][1],pts1[2][0],pts1[2][1]);
line(pts1[2][0],pts1[2][1],pts1[3][0],pts1[3][1]);
line(pts1[3][0],pts1[3][1],pts1[0][0],pts1[0][1]);
line(pts1[0][0],pts1[0][1],pts1[4][0],pts1[4][1]);
line(pts1[1][0],pts1[1][1],pts1[4][0],pts1[4][1]);
line(pts1[2][0],pts1[2][1],pts1[4][0],pts1[4][1]);
line(pts1[3][0],pts1[3][1],pts1[4][0],pts1[4][1]);
}
void drawscale()
{
line(pts2[0][0],pts2[0][1],pts2[1][0],pts2[1][1]);
line(pts2[1][0],pts2[1][1],pts2[2][0],pts2[2][1]);
line(pts2[2][0],pts2[2][1],pts2[3][0],pts2[3][1]);
line(pts2[3][0],pts2[3][1],pts2[0][0],pts2[0][1]);
line(pts2[0][0],pts2[0][1],pts2[4][0],pts2[4][1]);
line(pts2[1][0],pts2[1][1],pts2[4][0],pts2[4][1]);
line(pts2[2][0],pts2[2][1],pts2[4][0],pts2[4][1]);
line(pts2[3][0],pts2[3][1],pts2[4][0],pts2[4][1]);
}