private bool computeCameraRect(Point p1,Point p2,View view)
{
Rectangle r = Tool.MakeScreenRect(p1, p2);
if (r.Right - r.Left <= 0 || r.Bottom - r.Top <= 0)
{
mRectPT[0] = mRectPT[1] = mRectPT[2] = mRectPT[3] = Vector3F.Zero;
return false;
}
mRectPT[0] = view.getCamera().getScreenWorldLocation(r.Left, r.Top, view);
mRectPT[1] = view.getCamera().getScreenWorldLocation(r.Right, r.Top, view);
mRectPT[2] = view.getCamera().getScreenWorldLocation(r.Right, r.Bottom, view);
mRectPT[3] = view.getCamera().getScreenWorldLocation(r.Left, r.Bottom, view);
for (int i = 0; i < 4; i++ )
{
Vector3F dir = mRectPT[i] - view.getCamera().Position;
dir.Normalize();
dir = dir * 0.01f;
mRectPT[i] += dir;
}
return true;
}
public static IntersectionPair Intersect(Point screenpt, Plane plane, View view)
{
Vector3F pos = view.getCamera().getScreenWorldLocation(screenpt.X, screenpt.Y, view);
Vector3F dir = pos - view.getCamera().Position; dir.Normalize();
Ray ray = new Ray(pos, dir);
IntersectionPair res = Sharp3D.Math.Geometry3D.IntersectionMethods.Intersects(ray, plane);
return res;
}
