Wim Huyghe / Profile - Comments / Helix Toolkit forum

FEX: An example of some capabilities of Helix!

Got the measurement working also. Here my (dirty) code, but should give others some idea how to add the measurement line and label with distance:

private void viewPort3d_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

// Remove previour measurement line

if (viewPort3d.Children.Contains(mMeasurementline)) viewPort3d.Children.Remove(mMeasurementline);

if (viewPort3d.Children.Contains(mMeasurementText)) viewPort3d.Children.Remove(mMeasurementText);

// Define first point

System.Windows.Point p = e.GetPosition(viewPort3d);

var hits = Viewport3DHelper.FindHits(viewPort3d.Viewport, p);

if (hits.Any()) mPoint1 = hits[0].Position;

}

private void viewPort3d_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

{

System.Windows.Point p = e.GetPosition(viewPort3d);

var hits = Viewport3DHelper.FindHits(viewPort3d.Viewport, p);

if (hits.Any())

{

// Define second point

mPoint2 = hits[0].Position;

if (mPoint1 != null && mPoint2 != null)

{

double distance = Math.Sqrt(Math.Pow(mPoint1.X - mPoint2.X, 2) + Math.Pow(mPoint1.Y - mPoint2.Y, 2) + Math.Pow(mPoint1.Z - mPoint2.Z, 2));

mMeasurementText = new TextVisual3D();

mMeasurementText.Text = Math.Round(distance, 3).ToString() + " mm";

mMeasurementText.HorizontalAlignment = System.Windows.HorizontalAlignment.Center;

mMeasurementText.VerticalAlignment = System.Windows.VerticalAlignment.Bottom;

mMeasurementText.Height = distance / 10;

mMeasurementText.Position = new Point3D((mPoint1.X + mPoint2.X) / 2, (mPoint1.Y + mPoint2.Y) / 2, (mPoint1.Z + mPoint2.Z) / 2);

mMeasurementText.TextDirection = new Vector3D((mPoint1.X - mPoint2.X) / distance, (mPoint1.Y - mPoint2.Y) / distance, (mPoint1.Z - mPoint2.Z) / distance);

mMeasurementText.UpDirection = viewPort3d.Camera.UpDirection;

mMeasurementText.UpDirection.Normalize();

mMeasurementText.Foreground = new SolidColorBrush(Colors.Black);

viewPort3d.Children.Add(mMeasurementText);

mMeasurementline = new LinesVisual3D();

mMeasurementline.Points.Add(mPoint1);

mMeasurementline.Points.Add(mPoint2);

viewPort3d.Children.Add(mMeasurementline);

}

9 years ago

FEX: An example of some capabilities of Helix!

Hi, many thanks for the tips, these allowed to already find a solution for the "mesh on top". The trick was NOT to use the modelimporter class, but to use the STLReader class directly, as this exposes the read-in meshes. The modelimporter only gives a Model3DGroup back, and from this you cannot recreate the points collection (or at least I did not find out how...)

My code now looks like this:

StLReader reader = new StLReader();

reader.Read(fileName);

LinesVisual3D lines = new LinesVisual3D();

lines.Thickness = 1;

lines.Points = reader.Meshes[0].Positions;

viewPort3d.Children.Add(lines);

Now to solve the measurement function...

9 years ago

FEX: An example of some capabilities of Helix!

Hi,

Many thanx for the quick reply. There are actually 2 features I would like some hints on:

- how to make distance measurements between two points in a model

- showing the wire mesh on top of the coloured surfaces

For this last one I read I should use the LinesVisual3D and populate that using the Tesselate function, but this function seems not available on my imported STL-file (a ModelVisual3D object).

9 years ago

FEX: An example of some capabilities of Helix!

Very nice, really impressed. Any change parts of this will ever be released open source? I just started playing around with the Helix toolkit, and your library would be wonderfull to improve the looks and features...

9 years ago

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