void filled_circle( int x_pos, int y_pos,
int radius, int fillcolor);
int colormax;
/**************************************************/
void generate_circles()
/* this function draws a series of circles at random */
/* positions, each one after the first touching the */
/* nearest circle that has been previously drawn */
{
int xmax, ymax, x_pos, y_pos, radius;
randomize(); /* initialize the random numbers */
xmax = getmaxx(); /* maximum x and y positions */
ymax = getmaxy(); /* that can be displayed */
rmax = max( xmax, ymax)/2;
/* divisor of 2 can be changed to allow */
/* different maximum radii */
colormax = getmaxcolor();
/* select random position and draw first circle */
x_pos = rand() % xmax;
y_pos = rand() % ymax;
radius = rand() % rmax;
c[0].x = x_pos;
c[0].y = y_pos;
c[0].r = radius;
filled_circle( x_pos, y_pos, radius,
rand() % colormax);
/* select and draw remaining randomly placed circles */
/* each tangent to the nearest previously drawn */
/* circle */
for ( N= 1; N <= MAX_CIRCLES; N++)
{
do
{
exit_if_kbhit();
x_pos = rand() % xmax;
y_pos = rand() % ymax;
radius = new_radius( x_pos, y_pos);
} while (radius <= 0);
filled_circle( x_pos, y_pos, radius,
rand() % colormax + 1);
c[N].x = x_pos;
c[N].y = y_pos;
c[N].r = radius;
}
}
/**************************************************/
void filled_circle( int x_pos, int y_pos,
int radius, int fillcolor)
/* draws a circle filled with the specified color */
{
circle( x_pos, y_pos, radius);
setfillstyle( SOLID_FILL, fillcolor);
floodfill( x_pos, y_pos, getcolor());
}
/* End of File */