public void Translate(float dx, float dy)
{
for (int i = 0; i < points.Count; ++i)
{
AffineTransformer t = new AffineTransformer(AffineMatrix.FromPoint(points[i]));
t.Translate(dx, dy);
points[i] = t.GetResult().ToPoint();
}
RaiseChangedEvent(PolygonChangeType.PointsChanged);
}
public void Rotate(float angle, PointF point)
{
for (int i = 0; i < points.Count; ++i)
{
AffineTransformer t = new AffineTransformer(AffineMatrix.FromPoint(points[i]));
t.Translate(-point.X, -point.Y);
t.Rotate(angle);
t.Translate(point.X, point.Y);
points[i] = t.GetResult().ToPoint();
}
RaiseChangedEvent(PolygonChangeType.PointsChanged);
}
public void Scale(float width, float height)
{
float sumX = 0, sumY = 0;
for (int i = 0; i < points.Count; ++i)
{
sumX += points[i].X;
sumY += points[i].Y;
}
PointF transPoint = new PointF(sumX / points.Count, sumY / points.Count);
for (int i = 0; i < points.Count; ++i)
{
AffineTransformer t = new AffineTransformer(AffineMatrix.FromPoint(points[i]));
t.Translate(-transPoint.X, -transPoint.Y);
t.Scale(width, height);
t.Translate(transPoint.X, transPoint.Y);
points[i] = t.GetResult().ToPoint();
}
RaiseChangedEvent(PolygonChangeType.PointsChanged);
}