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 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();
}
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 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;
}
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()
{
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] ;
}
}
