int main()
{
double xp[1000],yp[1000] ;
int n,q ;
double P[2] ;
swidth = 700 ; sheight = 700 ;
G_init_graphics(swidth, sheight) ;
G_rgb(0,0,0) ;
G_clear() ;
G_rgb(1,0,0) ;
n = click_and_save(xp,yp) ;
G_rgb(0,1,0) ;
G_fill_polygon(xp,yp,n) ;
while(1==1){
G_wait_click(P) ;
if(P[1] < 40){
break;
}
int r = in_out(xp,yp,n,P);
if(r==1){
G_rgb(1,0,0);
}else{
G_rgb(0,0,1) ;
}
G_fill_circle(P[0],P[1],2) ;
}
q = G_wait_key() ;
}
int main()
{
double j ;
char q ;
G_init_graphics(601, 601) ;
// the original design was for a 400x400
// window and the object is centered on 200,200
// so we recenter it and make it larger
translate(-200, -200) ;
scale(2.0) ;
translate(300, 300) ;
j = 0 ;
while (j < 100) {
G_rgb(0,0,0) ;
G_clear() ;
G_rgb(0, 0.5, 1) ;
G_fill_polygon(x,y,n) ;
G_rgb(1, 1, 0) ;
G_polygon(x,y,n) ;
// q = G_wait_key() ;
G_display_image() ;
usleep(25000) ; // microseconds
translate(-300, -300) ;
scale(0.95) ;
rotate(4) ;
translate(300, 300) ;
j=j+1 ;
}
G_rgb(1,0,0) ;
G_fill_circle(300,300, 50) ;
q = G_wait_key() ;
}
int main()
// this tests clipping of polygon to convex window
//prefix -p == polygon; prefix -w == window
{
int pn, wn ;
double pt[2], u, v, q ;
double px[100] = { 70, 460, 400} ;
double py[100] = { 350, 25, 550} ;
pn = 3 ;
double wx[100] = { 100, 600, 550, 150} ;
double wy[100] = { 150, 200, 450, 500} ;
wn = 4 ;
srand48(100) ;
G_init_graphics (700, 700) ;
G_rgb (0, 0, 0) ;
G_clear() ;
G_rgb (1, 0, 0) ;
G_polygon(wx, wy, wn) ;
G_rgb (0, 0, 1) ;
G_polygon(px, py, pn) ;
q = G_wait_key() ;
pn = Clip_Polygon_Against_Convex_Window (px, py, pn, wx, wy, wn) ;
G_rgb (1, 1, 0) ;
for (int i = 0; i < pn; i++) {
G_fill_circle(px[i], py[i], 2);
printf("x:%.2lf, y:%.2lf\n", px[i], py[i]);
}
G_fill_polygon(px, py, pn) ;
q = G_wait_key() ;
}
int main ()
{
char prefix[100], sequence_name[100] ;
int s,e,i ;
double f ;
printf("enter prefix name ") ;
scanf("%s",prefix) ;
printf("enter starting integer ") ;
scanf("%d",&s) ;
printf("enter ending integer ") ;
scanf("%d",&e) ;
/*
printf("\n") ;
for (i = s ; i <= e ; i++) {
sprintf(sequence_name, "%s%04d.xwd", prefix, i) ;
printf("%s\n",sequence_name) ;
}
*/
G_init_graphics(400,400) ;
for (i = s ; i <= e ; i++) {
G_rgb(0,0,0) ;
G_clear() ;
f = 1.0*i/(e - s + 1) ;
G_rgb(1,f,0) ;
G_fill_circle(200,200,i) ;
sprintf(sequence_name, "%s%04d.xwd", prefix, i) ;
G_save_image_to_file(sequence_name) ;
}
G_close() ;
}
int main()
{
double swidth, sheight ;
double lowleftx, lowlefty, width, height ;
double x[10],y[10] ;
double numpoints,q, x0,y0,x1,y1 ;
double p[2] ;
// must do this before you do 'almost' any other
// graphical tasks
swidth = 400 ; sheight = 400 ;
G_init_graphics (swidth, sheight) ;
// draw a point, a line, some rectangles, some triangles
G_rgb(1, 0, 0) ; // red
G_point(200, 380) ;
G_rgb(0, 1, 0) ; // green
// G_line (0, 0, 400, 400) ; // won't show if part is off screen
G_line (0, 0, 399, 399) ;
G_rgb(0, 0, 1) ; // blue
lowleftx = 200 ; lowlefty = 50 ; width = 10 ; height = 30 ;
G_rectangle (lowleftx, lowlefty, width, height) ;
lowleftx = 250 ;
G_fill_rectangle (lowleftx, lowlefty, width, height) ;
G_rgb(1, 1, 0) ; // yellow
G_triangle (10, 300, 40,300, 60,250) ;
G_fill_triangle (10,100, 40,100, 60,150) ;
G_rgb(1, 0.5, 0) ; // orange
G_circle (100, 300, 75) ;
G_fill_circle (370, 200, 50) ;
// prints text in your graphics window
G_rgb(0, 0, 0) ; // black
G_draw_string ("hello",300,100) ;
// draw a polygon
x[0] = 100 ; y[0] = 100 ;
x[1] = 100 ; y[1] = 300 ;
x[2] = 300 ; y[2] = 300 ;
x[3] = 300 ; y[3] = 100 ;
x[4] = 200 ; y[4] = 175 ;
numpoints = 5 ;
G_polygon (x,y,numpoints) ;
q = G_wait_key() ; // pause to look ...any key to continue
G_rgb (0.4, 0.2, 0.1) ; // brown
G_fill_polygon (x,y,numpoints) ;
G_rgb (0.5, 0.8, 0.4) ;// what color is this?
G_wait_click(p) ; // wait for a mouse click
x0 = p[0] ; y0 = p[1] ; // extract coordinates
G_fill_rectangle (x0-2, y0-2, 4,4) ;// mark the clicked point
G_wait_click(p) ;
x1 = p[0] ; y1 = p[1] ;
G_fill_rectangle (x1-2, y1-2, 4,4) ;
G_rgb (0.5, 0.5, 0.5) ; // a grey
G_line (x0,y0, x1,y1) ;
q = G_wait_key() ; // pause again before exit
G_save_image_to_file ("t01c.xwd") ;
G_close() ; // terminate graphics...probably not fatal if forgotten
}
int main()
{
int swidth, sheight ;
double lowleftx, lowlefty, width, height ;
double x[10],y[10] ;
double numpoints,q, x0,y0,x1,y1 ;
double p[2] ;
int i ;
// must do this before you do 'almost' any other
// graphical tasks
swidth = 400 ; sheight = 500 ;
G_init_graphics (swidth, sheight) ;
// draw a point, a line, some rectangles, some triangles
G_rgb(1, 0, 0) ; // red
G_point(200, 380) ;
G_fill_rectangle (300,400, 50, 20) ;
G_rgb(0, 1, 0) ; // green
// G_line (0, 0, 400, 400) ; // won't show if part is off screen
G_line (0, 0, 399, 399) ;
G_fill_triangle(50, 400, 100,400, 150,475) ;
G_rgb(0, 0, 1) ; // blue
lowleftx = 200 ; lowlefty = 50 ; width = 10 ; height = 30 ;
G_rectangle (lowleftx, lowlefty, width, height) ;
lowleftx = 250 ;
G_fill_rectangle (lowleftx, lowlefty, width, height) ;
G_rgb(1, 1, 0) ; // yellow
G_triangle (10, 300, 40,300, 60,250) ;
G_fill_triangle (10,100, 40,100, 60,150) ;
G_rgb(1, 0.5, 0) ; // orange
G_circle (100, 300, 75) ;
G_fill_circle (370, 200, 50) ;
// prints text in your graphics window
G_rgb(0, 0, 0) ; // black
G_draw_string ("hello",300,100) ;
// draw a polygon
x[0] = 100 ; y[0] = 100 ;
x[1] = 100 ; y[1] = 300 ;
x[2] = 300 ; y[2] = 300 ;
x[3] = 300 ; y[3] = 100 ;
x[4] = 200 ; y[4] = 175 ;
numpoints = 5 ;
G_polygon (x,y,numpoints) ;
G_rgb (0.4, 0.2, 0.1) ; // brown
G_fill_polygon (x,y,numpoints) ;
G_rgb (0.5, 0.8, 0.4) ;// what color is this?
int xc,yc ;
int pixel ;
int rgbI[3] ;
double rgb[3] ;
G_wait_click(p) ;
xc = p[0] ; yc = p[1] ;
while (yc > 20) {
printf("%d %d\n",xc,yc) ;
pixel = G_get_pixel(xc,yc) ;
G_convert_pixel_to_rgbI(pixel, rgbI) ;
G_convert_rgbI_to_rgb(rgbI, rgb) ;
printf("pixel = %x\n",pixel) ;
printf("%3d %3d %3d\n",rgbI[0],rgbI[1],rgbI[2]) ;
printf("%lf %lf %lf\n",rgb[0],rgb[1],rgb[2]) ;
printf("\n") ;
G_wait_click(p) ;
xc = p[0] ; yc = p[1] ;
}
}
int main()
{
// analog clock using double buffering...simpler
double hours,minutes,seconds,x,y,nx,ny,theta,digit ;
double hx,hy,mx,my,sx,sy,angle ;
double oldhourtheta,oldminutetheta,oldsecondtheta ;
char text[3] ;
double hms[3] ;
double xx[100],yy[100] ;
int num ;
G_init_graphics(600,600) ;
while (0 < 1) {
// blank the window
G_rgb(0.3, 0.3, 0.3) ;
G_clear() ;
// outer circle of the clock face
G_rgb(0,0,1) ;
G_fill_circle(300,300,230) ;
G_rgb (1,0.5,0) ;
G_fill_circle(300,300,220) ;
// digits on the clock face
G_rgb (0,0,0) ;
theta = 90 ; // degrees
digit = 0 ;
while (theta > -270) {
theta = theta - 30 ;
digit = digit + 1 ;
nx = 200*cos(theta*M_PI/180) + 300 ;
ny = 200*sin(theta*M_PI/180) + 300 ;
if (digit >= 10) {
text[0] = '1' ;
text[1] = '0' + digit - 10 ;
text[2] = '\0' ;
}
else {
text[0] = '0' + digit ;
text[1] = '\0' ;
}
G_draw_string(text,nx-5,ny-5) ;
}
// get_timeD(hms) ;
// hours = hms[0] ;
// minutes = hms[1] ;
// seconds = hms[2] ;
printf("enter hours minutes seconds") ;
scanf("%lf %lf %lf",&hours,&minutes,&seconds) ;
G_rgb (0,0,0) ;
// set the second hand
theta = 90 - 6*seconds ;
angle = theta*M_PI/180 ;
sx = 175*cos(angle) + 300 ;
sy = 175*sin(angle) + 300 ;
// G_line(300,300,sx,sy) ;
num = make_arrow (300,300,
sx,sy,
3.0,
xx,yy) ;
G_fill_polygon(xx,yy,num) ;
// set the minute hand
theta = 90 - 6*(minutes + seconds/60.0) ;
angle = theta*M_PI/180 ;
mx = 140*cos(angle) + 300 ;
my = 140*sin(angle) + 300 ;
// G_line(300,300,mx,my) ;
num = make_arrow (300,300,
mx,my,
3.0,
xx,yy) ;
G_fill_polygon(xx,yy,num) ;
// set the hour hand
theta = 90 - 30*(hours + minutes/60.0 + seconds/3600.0) ;
angle = theta*M_PI/180 ;
hx = 75*cos(angle) + 300 ;
hy = 75*sin(angle) + 300 ;
// G_line(300,300,hx,hy) ;
num = make_arrow (300,300,
hx,hy,
3.0,
xx,yy) ;
G_fill_polygon(xx,yy,num) ;
G_rgb(0,0,0) ;
G_fill_circle(300,300,12) ;
G_display_image() ;
break ;
} // end while (0 < 1)
G_save_image_to_file("clock.xwd") ;
}
