protected override void OnPaint(PaintEventArgs e)
{
if (!suspended && init && !disposed && !Disposing && !IsDesigner)
{
device.BackgroundColor = BackColor;
device.OnSize(ClientSize);
view.EraseAll();
Point3d pt1 = extents.MinPoint;
Point3d pt2 = extents.MaxPoint;
Point3d ptm = new Point3d((pt1.X + pt2.X) / 2.0, (pt1.Y + pt2.Y) / 2.0, 0.0);
Point3d ptc = new Point3d(ptm.X, ptm.Y, 1.0);
double fw = Math.Abs(pt2.X - pt1.X);
double fh = Math.Abs(pt2.Y - pt1.Y);
view.SetView(ptc, ptm, Vector3d.YAxis, fw, fh);
foreach (Drawable item in items)
{
view.Add(item, model);
}
view.Update();
using (Bitmap bmp = view.GetSnapshot(ClientRectangle))
{
e.Graphics.DrawImageUnscaled(bmp, 0, 0);
}
if (m_Selected)
{
using (Pen pen = new Pen(m_SelectionColor, 2.0f))
{
Rectangle rec = ClientRectangle;
rec.Inflate(-2, -2);
e.Graphics.DrawRectangle(pen, rec);
}
}
}
}
public static void SetViewTo(Autodesk.AutoCAD.GraphicsSystem.View view, Database db)
{
if (_extMax.Equals(Point3d.Origin) && _extMin.Equals(Point3d.Origin))
{
// just check we have valid extents
if (db.Extmax.X < db.Extmin.X || db.Extmax.Y < db.Extmin.Y || db.Extmax.Z < db.Extmax.Z)
{
db.Extmin = new Point3d(0, 0, 0);
db.Extmax = new Point3d(400, 400, 400);
}
// get the dwg extents
_extMax = db.Extmax;
_extMin = db.Extmin;
}
// now the active viewport info
double height = 0.0, width = 0.0, viewTwist = 0.0;
Point3d targetView = new Point3d();
Vector3d viewDir = new Vector3d();
GetActiveViewPortInfo(ref height, ref width, ref targetView, ref viewDir, ref viewTwist, true);
// from the data returned let's work out the viewmatrix
viewDir = viewDir.GetNormal();
Vector3d viewXDir = viewDir.GetPerpendicularVector().GetNormal();
viewXDir = viewXDir.RotateBy(viewTwist, -viewDir);
Vector3d viewYDir = viewDir.CrossProduct(viewXDir);
Point3d boxCenter = _extMin + 0.5 * (_extMax - _extMin);
Matrix3d viewMat;
viewMat = Matrix3d.AlignCoordinateSystem(boxCenter, Vector3d.XAxis, Vector3d.YAxis, Vector3d.ZAxis,
boxCenter, viewXDir, viewYDir, viewDir).Inverse();
Extents3d wcsExtents = new Extents3d(_extMin, _extMax);
Extents3d viewExtents = wcsExtents;
viewExtents.TransformBy(viewMat);
double xMax = System.Math.Abs(viewExtents.MaxPoint.X - viewExtents.MinPoint.X);
double yMax = System.Math.Abs(viewExtents.MaxPoint.Y - viewExtents.MinPoint.Y);
Point3d eye = boxCenter + viewDir;
view.SetView(eye, boxCenter, viewYDir, xMax, yMax);
view.Invalidate();
view.Update();
}
