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 test01()
{
int sig = 0 ;
int p[2], x,y, i ;
double degrees ;
swidth = 500 ;
sheight = 600 ;
if(! G_init_graphics (swidth, sheight)) return -1;
Draw(0);
G_display_image() ;
i = 0 ;
while(sig != 'q') {
sig = Gi_events(p) ;
x = p[0] ; y = p[1] ;
degrees = sqrt(x*x + y*y) ;
printf("i = %d sig = %d x = %d y = %d\n",i,sig,x,y) ;
i++ ;
if (sig == -4) {
// window resize
swidth = x ; sheight = y ;
}
Draw(degrees);
G_display_image() ;
}
G_close();
return 1;
}
int test02(int numreps, int sleepflag, int microseconds)
{
double degrees ;
int i ;
swidth = 500 ;
sheight = 600 ;
if(! G_init_graphics (swidth, sheight)) return -1;
for (i = 0 ; i < numreps ; i++) {
degrees = i ;
Draw(degrees);
G_display_image() ;
if (sleepflag) usleep(microseconds) ;
}
G_close();
return 1;
}
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
}