void
Shape::d_markAnchorTilt()
{
if(!pixdebug) return;
int x1 = getmaxx();
int y1 = gety(x1);
// tilt check with maxx pixel offset to the center pixel using y
int y2 = (y1 > getcy()) ? getminy() : getmaxy();
int x2 = getx(y2);
int o = x1 - x2;
int a = ( y1 > y2 ) ? y1 - y2 : y2 - y1;
// threshold check and return if within
int threshold = (o > a) ? o/10 : a/10;
if (threshold <= 0) threshold = 5;
if (abs(o - a) < threshold) return;
if( o > 0 && a > 0 ) {
if( y2 > y1 ) d_pixmap->setPen(0, 255, 255);
else d_pixmap->setPen(255, 0, 255);
d_pixmap->markHLine( x1, x2, y1);
d_pixmap->markHLine( x1, x2, y1+1);
d_pixmap->markHLine( x1, x2, y1-1);
d_pixmap->markVLine( y1, y2, x1);
d_pixmap->markVLine( y1, y2, x1+1);
d_pixmap->markVLine( y1, y2, x1-1);
}
}
int main()
{
int n;
scanf("%d",&n);
for(int i=0;i<n;i++)
{
getpoint(points+i);
}
getminy(n);
qsort ( points+1, n-1, sizeof(*points), comparepolar);
push(points[0]);
push(points[1]);
for(int i=2;i<n;i++)
{
while(ccw(stack[top-1],stack[top],points[i])<=0&&top>0)
{
// printf("stack-->");putpoint(stack[top]);printf("\n");
top--;
}
//printf("stack<--");putpoint(points[i]);printf("\n");
push(points[i]);
}
int t=top;
while(t>=0)
{
putpoint(stack[t]);
printf("\n");
t--;
}
fflush(stdin);
getchar();
}
