private void ShowPositionsArray(Vector3[] positionsArray, float pixelSize, Color4 pixelColor, Bounds positionBounds)
{
if (_isUsingPixelsVisual3D)
{
// The easiest way to show many pixels is to use PixelsVisual3D.
var pixelsVisual3D = new PixelsVisual3D()
{
Positions = positionsArray,
PixelColor = pixelColor.ToWpfColor(),
PixelSize = pixelSize
};
// It is highly recommended to manually set the PositionsBounds.
// If this is not done, the bounds are calculated by the DXEngine with checking all the positions.
pixelsVisual3D.PositionsBounds = positionBounds;
MainViewport.Children.Add(pixelsVisual3D);
// !!! IMPORTANT !!!
// When PixelsVisual3D is not used any more, it needs to be disposed (we are using DisposeList to dispose all in Unloaded event handler)
_disposables.Add(pixelsVisual3D);
return;
}
// First stop in showing positions in the positionsArray as pixels is to create a SimpleMesh<Vector3>.
// This will create a DirectX VertexBuffer that will be passed to the shaders.
var simpleMesh = new SimpleMesh <Vector3>(vertexBufferArray: positionsArray,
indexBufferArray: null,
inputLayoutType: InputLayoutType.Position);
simpleMesh.PrimitiveTopology = PrimitiveTopology.PointList; // We need to change the default PrimitiveTopology.TriangleList to PointList
// To correctly set the Camera's Near and Far distance, we need to provide the correct bounds of each shown 3D model.
if (positionBounds != null && !positionBounds.IsEmpty)
{
// It is highly recommended to manually set the Bounds.
simpleMesh.Bounds = positionBounds;
}
else
{
// if we do not manually set the Bounds, then we need to call CalculateBounds to calculate the bounds
simpleMesh.CalculateBounds();
}
simpleMesh.CalculateBounds();
// We will need to dispose the SimpleMesh
_disposables.Add(simpleMesh);
// Create a new PixelMaterial
_pixelMaterial = new PixelMaterial()
{
PixelColor = pixelColor,
PixelSize = pixelSize
};
_pixelMaterial.InitializeResources(MainDXViewportView.DXScene.DXDevice);
_disposables.Add(_pixelMaterial);
// Now create a new MeshObjectNode
_meshObjectNode = new Ab3d.DirectX.MeshObjectNode(simpleMesh, _pixelMaterial);
_disposables.Add(_meshObjectNode);
// To be able to add the MeshObjectNode (or any other SceneNode) to WPF's Viewport3D,
// we need to create a SceneNodeVisual3D
var sceneNodeVisual3D = new SceneNodeVisual3D(_meshObjectNode);
MainViewport.Children.Add(sceneNodeVisual3D);
}