int main()
{
double swidth, sheight ;
double i,x,y ;
double z[2] ;
swidth = 600 ; sheight = 600 ;
G_init_graphics(swidth, sheight);
i = 0;
while(i<600){
G_rgb(0,0,1) ;
G_line (i, 0, i, 599) ;
G_line(0,i,599,i) ;
i=i+10 ;
}
i=0;
while(i<10){
G_wait_click(z) ;
x = z[0] ; y = z[1] ;
x=x-fmod(x,10);
y=y-fmod(y,10);
G_fill_rectangle(x, y ,10,10);
i++;
}
G_wait_key();
}
void getClippingWindow(){
double coords[2];
int i = 0;
G_rgb(255,0,0);
G_fill_rectangle(0,0,40,40);
while(1==1){
G_wait_click(coords);
if(coords[0] < 40 && coords[1] < 40){
break;}
else{
cx[i] = coords[0];
cy[i] = coords[1];
G_rgb(255,255,255);
G_fill_rectangle(coords[0],coords[1], 5,5);
center[0] += cx[i];
center[1] += cy[i];
i++;
}
}
center[0] /=i;
center[1] /=i;
cSize = i;
}
int main (int argc, char **argv)
{
int w,h,nrows, ncols ;
double r[2],g[2],b[2] ;
int i,j,k,q ;
double dx,dy ;
if (argc != 12) {
printf("Usage : pgm xwd_res_file_name width height nrows ncols r0 g0 b0 r1 g1 b1\n") ;
exit(0) ;
}
w = atoi(argv[2]) ;
h = atoi(argv[3]) ;
nrows = atoi(argv[4]) ;
ncols = atoi(argv[5]) ;
r[0] = atof(argv[6]) ;
g[0] = atof(argv[7]) ;
b[0] = atof(argv[8]) ;
r[1] = atof(argv[9]) ;
g[1] = atof(argv[10]) ;
b[1] = atof(argv[11]) ;
G_init_graphics(w,h) ;
G_rgb(0,1,0) ;
G_clear() ;
// reveals a green bottom line...error in FPT's G_fill_rectangle
// ...now fixed
dx = 1.0*w/ncols ;
dy = 1.0*h/nrows ;
for (i = 0 ; i < ncols ; i++) {
for (j = 0 ; j < nrows ; j++) {
k = (i + j) % 2 ;
G_rgb(r[k],g[k],b[k]) ;
G_fill_rectangle(i*dx,j*dy,dx,dy) ;
}
}
q = G_wait_key() ;
G_save_image_to_file(argv[1]) ;
}
int clickandsave(double x[], double y[]){
double coords[2];
int length;
int i;
for(i = 0; i< 100; i++){
G_wait_click(coords);
if(coords[0] < 44 && coords[1] > 580){
break;
}
else{
x[i] = coords[0];
y[i] = coords[1];
G_fill_rectangle(coords[0] -1, coords[1] -1 , 3, 3 );
length = i;
}
}
return i;
}
int click_and_save (double *x, double *y)
{
int n ;
double P[2] ;
G_rgb(0,1,0.5) ;
G_fill_rectangle(0,0,swidth,20) ;
G_rgb(1,0,0) ;
G_wait_click(P);
n = 0 ;
while (P[1] > 20) {
x[n] = P[0] ;
y[n] = P[1] ;
G_circle(x[n],y[n],2) ;
if (n > 0) { G_line(x[n-1],y[n-1], x[n],y[n]) ;}
n++ ;
G_wait_click(P) ;
}
return n ;
}
int main()
{
double pwidth, pheight, bwidth ;
double angle,hx,hy,mx,my,sx,sy ;
double hours,minutes,seconds ;
double x,y,nx,ny,digit ;
int theta ; //INTERESTING that this MUST be int to avoid flicker-WHY?
double oldhourtheta,oldminutetheta,oldsecondtheta ;
char text[3] ;
double hms[3] ; // hours,minutes,seconds
G_init_graphics(600,600) ;
G_rgb (1,1,1) ;
G_fill_rectangle (0,0, 600,600) ;
// outer circle of the clock face
G_rgb (1,0,0) ; // red
theta = 0 ; // degrees
x = 225*cos(theta*M_PI/180) + 300 ;
y = 225*sin(theta*M_PI/180) + 300 ;
while (theta <= 360) {
theta = theta + 1 ;
nx = 225*cos(theta*M_PI/180) + 300 ;
ny = 225*sin(theta*M_PI/180) + 300 ;
G_line(x,y,nx,ny) ;
x = nx ;
y = ny ;
}
G_display_image() ;
// digits on the clock face
G_rgb (0,0,0) ; // black
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) ;
}
G_display_image() ;
oldsecondtheta = oldminutetheta = oldhourtheta = -10000000 ;
sx = sy = mx = my = hx = hy = 300 ;
while (0 < 1) {
/* watch out for SLIGHT FLAW : if one of the hands overlays another,
then if it is erased, you'll erase the other as well...this should
fix that...we erase them all and redraw them all */
get_timeD (hms) ;
hours = hms[0] ;
minutes = hms[1] ;
seconds = hms[2] ;
// set the second hand
theta = 90 - 6*seconds ;
if (theta != oldsecondtheta) {
G_rgb (1,1,1) ; // white
G_line(300,300,sx,sy) ;
G_line(300,300,mx,my) ;
G_line(300,300,hx,hy) ;
angle = theta*M_PI/180 ;
sx = 175*cos(angle) + 300 ;
sy = 175*sin(angle) + 300 ;
G_rgb (1,0,0) ; // red
G_line(300,300,sx,sy) ;
G_line(300,300,mx,my) ;
G_line(300,300,hx,hy) ;
G_display_image() ;
oldsecondtheta = theta ;
}
// set the minute hand
theta = 90 - 6*(minutes + seconds/60.0) ;
if (theta != oldminutetheta) {
G_rgb (1,1,1) ; // white
G_line(300,300,sx,sy) ;
G_line(300,300,mx,my) ;
G_line(300,300,hx,hy) ;
angle = theta*M_PI/180 ;
mx = 140*cos(angle) + 300 ;
my = 140*sin(angle) + 300 ;
G_rgb (1,0,0) ; // red
G_line(300,300,sx,sy) ;
G_line(300,300,mx,my) ;
G_line(300,300,hx,hy) ;
G_display_image() ;
oldminutetheta = theta ;
}
// set the hour hand
theta = 90 - 30*(hours + minutes/60.0 + seconds/3600.0) ;
if (theta != oldhourtheta) {
G_rgb (1,1,1) ; // white
G_line(300,300,sx,sy) ;
G_line(300,300,mx,my) ;
G_line(300,300,hx,hy) ;
angle = theta*M_PI/180 ;
hx = 75*cos(angle) + 300 ;
hy = 75*sin(angle) + 300 ;
G_rgb (1,0,0) ; // red
G_line(300,300,sx,sy) ;
G_line(300,300,mx,my) ;
G_line(300,300,hx,hy) ;
G_display_image() ;
oldhourtheta = theta ;
}
} // end while (0 < 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
}
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] ;
}
}
