void main( )
{
struct polynode *first, *second, *mult ;
int i = 1 ;
first = second = mult = NULL ; /* empty linked lists */
poly_append ( &first, 3, 5 ) ;
poly_append ( &first, 2, 4 ) ;
poly_append ( &first, 1, 2 ) ;
display_poly ( first ) ;
poly_append ( &second, 1, 6 ) ;
poly_append ( &second, 2, 5 ) ;
poly_append ( &second, 3, 4 ) ;
printf ( "\n\n" ) ;
display_poly ( second ) ;
printf ( "\n" );
while ( i++ < 79 )
printf ( "-" ) ;
poly_multiply ( first, second, &mult ) ;
printf ( "\n\n" ) ;
display_poly ( mult ) ;
}
static void poly_edge_clip(poly sub, vec x0, vec x1, int left, poly res)
{
int i, side0, side1;
vec_t tmp;
vec v0 = sub->v + sub->len - 1, v1;
res->len = 0;
side0 = left_of(x0, x1, v0);
if (side0 != -left) poly_append(res, v0);
for (i = 0; i < sub->len; i++) {
v1 = sub->v + i;
side1 = left_of(x0, x1, v1);
if (side0 + side1 == 0 && side0)
/* last point and current straddle the edge */
if (line_sect(x0, x1, v0, v1, &tmp))
poly_append(res, &tmp);
if (i == sub->len - 1) break;
if (side1 != -left) poly_append(res, v1);
v0 = v1;
side0 = side1;
}
}
int main( )
{
struct polynode *first, *second, *total ;
int i = 0 ;
first = second = total = NULL ; /* empty linked lists */
poly_append ( &first, 1.4f, 5 ) ;
poly_append ( &first, 1.5f, 4 ) ;
poly_append ( &first, 1.7f, 2 ) ;
poly_append ( &first, 1.8f, 1 ) ;
poly_append ( &first, 1.9f, 0 ) ;
system ( "cls" ) ;
display_poly ( first ) ;
poly_append ( &second, 1.5f, 6 ) ;
poly_append ( &second, 2.5f, 5 ) ;
poly_append ( &second, -3.5f, 4 ) ;
poly_append ( &second, 4.5f, 3 ) ;
poly_append ( &second, 6.5f, 1 ) ;
printf ( "\n\n" ) ;
display_poly ( second ) ;
/* draws a dashed horizontal line */
printf ( "\n" ) ;
while ( i++ < 79 )
printf ( "-" ) ;
printf ( "\n\n" ) ;
poly_add ( first, second, &total ) ;
display_poly ( total ) ; /* displays the resultant polynomial */
return 0 ;
}
