public void move(double dx, double dy)
{
int n = countPoint();
for (int i = 0; i < n; i++)
{
PointCoord p = (PointCoord)this.polygon[i];
p.x += dx; p.y += dy;
}
}
public PointCoord pointMirrorSymmetry(PointCoord p)
{
if (this.isVertical())
{
return(new PointCoord(2 * a - p.x, p.y));
}
else
{
double x2 = (2 * (p.y - b) + (1 / k - k) * p.x) / (k + 1 / k);
double y2 = p.y + (p.x - x2) / k;
return(new PointCoord(x2, y2));
}
}
public Polygon toScrPolygon(int x0, int y0)
{
if (type == TYPE_POLYGON)
{
int n = countPoint();
int[] x = new int[n], y = new int[n];
for (int i = 0; i < n; i++)
{
Point p = PointCoord.toScrPoint(getPoint(i).x, getPoint(i).y, x0, y0);
x[i] = p.X; y[i] = p.Y;
}
return(new Polygon(x, y, n));
}
else
{
return(null); //?????
}
}
public PicObject picObjectMirrorSymmetry(PicObject pic)
{
if (pic.mirror == this)
{
return(null); // a Pic In this mirror can not through the mirror itself
}
Color color = colorMirrorRef(pic.color, refl);
PicObject pic2 = new PicObject(pic.type, color, pic.filled);
int n = pic.countPoint();
for (int i = 0; i < n; i++)
{
PointCoord p = pic.getPoint(i);
pic2.addPoint(pointMirrorSymmetry(p));
}
pic2.mirror = this;
pic2.originalPicObject = pic.originalPicObject;
pic2.srcPicObject = pic;
return(pic2);
}
public bool contains(PointCoord p)
{
return(toScrPolygon(0, 0).contains(p.toScrPoint(0, 0)));
}
public void addPoint(PointCoord p)
{
addPoint(p.x, p.y);
}