mcab21 wrote at 2014-02-04 16:26:

icube wrote at 2011-06-21 15:16:

Hi,

Looking at the TerrainDemo project, it uses a .btz file. How can i create such a file? Can't really find anything on google regarding this...

And also, could you do a MultiTouchDemo that uses multi touch input to navigate the HelixView3D.

Thanks for this awesome project.

Regards

objo wrote at 2011-06-22 10:18:

.btz is just a gzip compressed .bt file (binary terrain file). It is only used inside Helix toolkit to reduce the size of the .bt files. You can use GZipStream to compress a .bt file, and the TerrainModel class should be able to read it. You find the TerrainModel class in Visual3Ds/Composite/TerrainVisual3D.cs

Note that this class does not implement a level of detail algorithm, so it is only useful for small models. (You can find LOD implementations on http://www.vterrain.org/)

For documentation on .bt files, see http://www.vterrain.org/Implementation/Formats/BT.html

A multi-touch demo would be very interesting, but I don't have any hardware to test it on myself!

JoJo1 wrote at 2013-12-10 06:26:

objo wrote at 2013-12-12 21:42:

objo wrote at 2013-12-13 14:46:

Elemental wrote at 2011-11-18 07:24:

I really like your ViewCube, but one of my collegues at work had an idea that makes it even beter (in my opinion ;-) )

When you click on one side of the cube it rotates to the side. The change is that it rotates to the opposite site on double click.

It an easy change and I thought maybe you want to add it to your library...

       private DateTime lastClick = DateTime.MinValue;

        void cube_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            DateTime currentTime = DateTime.Now;

            Vector3D normalVector = this.m_dicNormalVectors[sender];
            Vector3D upVector = this.m_dicUpVectors[sender];

            //check if this was a double click or a normal click
            if ((currentTime - lastClick).TotalSeconds < 0.5)
            {
                //this was a double click, so scroll to the opposite side of the cube
                normalVector = this.m_dicOppositeNormalVectors[sender];
                upVector = this.m_dicOppositeUpVectors[sender];
            }
            lastClick = currentTime;

            var camera = this.MainViewport.Camera as ProjectionCamera;
            Point3D target = camera.Position + camera.LookDirection;
            double distance = camera.LookDirection.Length;

            Vector3D lookDirection = -normalVector;
            lookDirection.Normalize();
            lookDirection = lookDirection * distance;

            Point3D pos = target - lookDirection;
            Vector3D upDirection = upVector;
            upDirection.Normalize();

            Helper.AnimateTo(camera, pos, lookDirection, upDirection, 500);
        }

Best Regards

objo wrote at 2011-11-18 19:00:

good idea! I added double-click to the ViewCube in change set 72415!

Elemental wrote at 2011-11-20 18:55:

Wow, I learn so much from your toolkit!

Didn't know the MouseButtonEventArgs has a ClickCount property :-)

JustFreak wrote at 2013-05-09 21:08:

objo wrote at 2013-05-27 15:23:

mihaipruna wrote at 2014-04-20 00:42:

objo wrote at 2014-04-29 10:15:

viettp wrote at 2011-10-02 19:22:

I found that alpha color of plane in ExportDemo only work if the transparent plane is declared last.

I need transparent surface feature in my project and don't want to depend on order of visuals. Is there anyway to overcome this issue?

objo wrote at 2011-10-03 19:31:

try the SortingVisual3D, this object sorts its children on distance from the camera to the center of each child's bounding box. 

This is sufficient for simple models like the one shown in the TransparencyDemo, but for more complicated models it might not always give the correct result..

http://helixtoolkit.codeplex.com/wikipage?title=TransparencyDemo

etick wrote at 2013-02-16 11:56:

objo wrote at 2013-03-12 11:44: