public static bool mate(edge e, List <point> s, ref point p)
{
int fl = 0;
point bestp = null;
double t = double.MaxValue, bestt = double.MaxValue;
edge f = new edge(e);
f = f.rot();
for (int i = 0; i < s.Count; ++i)
{
if (BaseAlgs.classify(s[i], e) == BaseAlgs.orientation.Right)
{
point tp = s[i];
edge g = new edge(ref e.dest, ref tp);
//edge g = new edge(e.dest, tp);
g.rot();
BaseAlgs.intersect(f, g, out t);
if (t < bestt)
{
fl = 1;
bestp = s[i];
bestt = t;
}
}
}
if (fl == 1)
{
p = bestp;
return(true);
}
return(false);
}
private int pointsComparer(point ps, point pd, point p)
{
switch (BaseAlgs.classify(p, new edge(ref ps, ref pd)))
{
case BaseAlgs.orientation.Left: return(-1);
case BaseAlgs.orientation.Right: return(1);
default: return(0);
}
}
public static point intersectionPoint(edge e1, edge e2)
{
point p = null;
double t;
if (intersect(e1, e2, out t) == forIntersectionPoint.Skew_Cross)
{
p = BaseAlgs.pt(e1, t);
}
return(p);
}
////////////////////////////////////////////////
private void button1_Click(object sender, EventArgs e)
{
point p = pointsBox.SelectedItem as point;
edge ed = edgesBox.SelectedItem as edge;
if (p == null || ed == null)
{
MessageBox.Show("Выберите ребро и точку!");
}
else
{
textBox1.Text = BaseAlgs.classify(p, ed).ToString();
}
}
private void isPointInsideButton_Click(object sender, EventArgs e)
{
point p = pointsBox.SelectedItem as point;
if (p == null)
{
MessageBox.Show("Выберите точку!");
}
else if (plgn == null)
{
MessageBox.Show("Создайте полигон!");
}
else
{
isPointInsideTextBox.Text = BaseAlgs.isPointInsidePolygon(p, plgn).ToString();
}
}
private void edgeIntersectButton_Click(object sender, EventArgs e)
{
edge e1 = comboBoxEdgeIntsct1.SelectedItem as edge;
edge e2 = comboBoxEdgeIntsct2.SelectedItem as edge;
if (e1 == null || e2 == null)
{
MessageBox.Show("Выберите ребра!");
}
else if (e1 == e2)
{
MessageBox.Show("Выберите разные ребра!");
}
else
{
point p = BaseAlgs.intersectionPoint(e1, e2);
if (p != null)
{
drawPoint(p, Color.Blue);
}
}
}
public static edge hullEdge(List <point> s)
{
point p1, p2;
int m = 0;
for (int i = 0; i < s.Count; ++i)
{
if (s[i] < s[m])
{
m = i;
}
}
point p = new point(s[0].x, s[0].y);
s[0].x = s[m].x;
s[0].y = s[m].y;
s[m] = p;
m = 1;
for (int j = 2; j < s.Count; ++j)
{
p1 = s[0];
p2 = s[m];
BaseAlgs.orientation c = BaseAlgs.classify(s[j], new edge(ref p1, ref p2));
//BaseAlgs.orientation c = BaseAlgs.classify(s[j], new edge(p1, p2));
if (c == BaseAlgs.orientation.Left || c == BaseAlgs.orientation.Between)
{
m = j;
}
}
p1 = s[0];
p2 = s[m];
return(new edge(ref p1, ref p2));
//return new edge(p1, p2);
}