//构造平行线上点法
private void button8_Click(object sender, EventArgs e)
{
delFeature("point");
IPoint[] points = new IPoint[2];
for (int i = 0; i < 2; i++)
{
points[i] = new PointClass();
}
points[0].PutCoords(0, 0);
points[1].PutCoords(20, 0);
ISegment segment;
ILine line = new LineClass();
line.FromPoint = points[0];
line.ToPoint = points[1];
segment = line as ISegment;
IPoint fromPoint = new PointClass();
fromPoint.X = points[0].X + 10;
fromPoint.Y = points[0].Y + 5;
IConstructPoint constructPoint = new PointClass();
constructPoint.ConstructParallel(segment, esriSegmentExtension.esriNoExtension, fromPoint, segment.Length);
addFeature("point", points[0]);
addFeature("point", points[1]);
addFeature("point", constructPoint as IPoint);
axMapControl1.Refresh();
}
