// Create a yellow sphere that will represent the light
private void CreateLightSphere()
{
_lightTransform = new TranslateTransform3D(300, 80, 0);
var lightSphere = new Ab3d.Visuals.SphereVisual3D();
lightSphere.CenterPosition = new Point3D(0, 0, 0);
lightSphere.Radius = 8;
lightSphere.Transform = _lightTransform;
var materialGroup = new MaterialGroup();
materialGroup.Children.Add(new DiffuseMaterial(Brushes.Black));
materialGroup.Children.Add(new EmissiveMaterial(Brushes.Yellow));
lightSphere.Material = materialGroup;
MainDXViewportView.Viewport3D.Children.Add(lightSphere);
UpdateLightSpherePosition();
}
private void UpdateClosestLine()
{
if (_lineSelectorData == null || _lineSelectorData.Count == 0)
{
return;
}
if (_isCameraChanged)
{
// Each time camera is changed, we need to call CalculateScreenSpacePositions method.
// This will update the 2D screen positions of the 3D lines.
// IMPORTANT:
// Before calling CalculateScreenSpacePositions it is highly recommended to call Refresh method on the camera.
Camera1.Refresh();
if (MultiThreadedCheckBox.IsChecked ?? false)
{
// This code demonstrates how to use call CalculateScreenSpacePositions from multiple threads.
// This significantly improves performance when many 3D lines are used (thousands)
// but is not needed when using only a few lines (as in this demo).
//
// When calling CalculateScreenSpacePositions we need to prepare all the data
// from WPF properties before calling the method because those properties
// are not accessible from the other thread.
// We need worldToViewportMatrix and
// the _lineSelectorData[i].Camera and _lineSelectorData[i].UsedLineThickness need to be set
// (in this sample they are set in the LineSelectorData constructor).
var worldToViewportMatrix = new Matrix3D();
bool isWorldToViewportMatrixValid = Camera1.GetWorldToViewportMatrix(ref worldToViewportMatrix, forceMatrixRefresh: false);
if (isWorldToViewportMatrixValid)
{
Parallel.For(0, _lineSelectorData.Count,
i => _lineSelectorData[i].CalculateScreenSpacePositions(ref worldToViewportMatrix, transform: null));
}
}
else
{
for (var i = 0; i < _lineSelectorData.Count; i++)
{
_lineSelectorData[i].CalculateScreenSpacePositions(Camera1);
}
}
_isCameraChanged = false;
}
// Now we can call the GetClosestDistance method.
// This method calculates the closest distance from the _lastMousePosition to the line that was used to create the LineSelectorData.
// GetClosestDistance also sets the LastDistance, LastLinePositionIndex properties on the LineSelectorData.
if (MultiThreadedCheckBox.IsChecked ?? false)
{
Parallel.For(0, _lineSelectorData.Count,
i => _lineSelectorData[i].GetClosestDistance(_lastMousePosition));
}
else
{
for (var i = 0; i < _lineSelectorData.Count; i++)
{
_lineSelectorData[i].GetClosestDistance(_lastMousePosition);
}
}
// Get the closest line
IEnumerable <LineSelectorData> usedLineSelectors;
// If we limit the distance of the specified position to the line, then we can filter all the line with Where
if (_maxSelectionDistance >= 0)
{
usedLineSelectors = _lineSelectorData.Where(l => l.LastDistance <= _maxSelectionDistance).ToList();
}
else
{
usedLineSelectors = _lineSelectorData;
}
List <LineSelectorData> orderedLineSelectors;
if (OrderByDistanceCheckBox.IsChecked ?? false)
{
// Order by camera distance
orderedLineSelectors = usedLineSelectors.OrderBy(l => l.LastDistanceFromCamera).ToList();
}
else
{
// Order by distance to the specified position
orderedLineSelectors = usedLineSelectors.OrderBy(l => l.LastDistance).ToList();
}
// Get the closest LineSelectorData
LineSelectorData closestLineSelector;
if (orderedLineSelectors.Count > 0)
{
closestLineSelector = orderedLineSelectors[0];
}
else
{
closestLineSelector = null;
}
// It is possible to get the positions of the line segment that is closest to the mouse position
//var closestPolyLine = (PolyLineVisual3D)closestLineSelector.LineVisual;
//Point3D firstSegmentPosition = closestPolyLine.Positions[closestLineSelector.LastLinePositionIndex];
//Point3D secondSegmentPosition = closestPolyLine.Positions[closestLineSelector.LastLinePositionIndex + 1];
// To get the actual position on the line that is closest to the mouse position, use the LastClosestPositionOnLine
//closestLineSelector.LastClosestPositionOnLine;
// The closest position on the line is shown with a SphereVisual3D
if (_closestPositionSphereVisual3D == null)
{
_closestPositionSphereVisual3D = new SphereVisual3D()
{
Radius = 2,
Material = new DiffuseMaterial(Brushes.Red)
};
MainViewport.Children.Add(_closestPositionSphereVisual3D);
}
if (closestLineSelector == null)
{
ClosestDistanceValue.Text = "";
LineSegmentIndexValue.Text = "";
_closestPositionSphereVisual3D.IsVisible = false;
}
else
{
ClosestDistanceValue.Text = string.Format("{0:0.0}", closestLineSelector.LastDistance);
LineSegmentIndexValue.Text = closestLineSelector.LastLinePositionIndex.ToString();
_closestPositionSphereVisual3D.CenterPosition = closestLineSelector.LastClosestPositionOnLine;
_closestPositionSphereVisual3D.IsVisible = true;
}
// Show the closest line as red
if (!ReferenceEquals(_lastSelectedLineSelector, closestLineSelector))
{
if (_lastSelectedLineSelector != null)
{
_lastSelectedLineSelector.LineVisual3D.LineColor = _savedLineColor;
}
if (closestLineSelector != null)
{
_savedLineColor = closestLineSelector.LineVisual3D.LineColor;
closestLineSelector.LineVisual3D.LineColor = Colors.Red;
}
_lastSelectedLineSelector = closestLineSelector;
}
}
private void CreateScene(Viewport3D parentViewport3D, double sphereRadius, double depthBias, TargetPositionCamera targetPositionCamera, bool showSphere)
{
parentViewport3D.Children.Clear();
if (showSphere)
{
var sphereVisual3D = new Ab3d.Visuals.SphereVisual3D()
{
CenterPosition = new Point3D(0, 0, 0),
Radius = sphereRadius,
Segments = 10,
Material = new DiffuseMaterial(Brushes.SkyBlue),
UseCachedMeshGeometry3D = false // This will create a new MeshGeometry3D and will not use the shared MeshGeometry3D with radius = 1
};
parentViewport3D.Children.Add(sphereVisual3D);
var sphereMesh = ((GeometryModel3D)sphereVisual3D.Content).Geometry as MeshGeometry3D;
var sphereLinePositions = CollectWireframeLinePositions(sphereMesh);
var multiLineVisual3D = new Ab3d.Visuals.MultiLineVisual3D()
{
Positions = sphereLinePositions,
LineThickness = 0.5,
LineColor = Colors.Black
};
// To specify line depth bias to the Ab3d.PowerToys line Visual3D objects,
// we use SetDXAttribute extension method and use LineDepthBias as DXAttributeType
// NOTE: This can be used only before the Visual3D is created by DXEngine.
// If you want to change the line bias after the object has been rendered, use the SetDepthBias method (defined below)
multiLineVisual3D.SetDXAttribute(DXAttributeType.LineDepthBias, depthBias);
// It would be also possible to set the depth with changing the DepthBias on the WpfWireframeVisual3DNode.
// This is done with using the SetDepthBias method
//SetDepthBias(dxViewportView, wireframeVisual3D, depthBias);
parentViewport3D.Children.Add(multiLineVisual3D);
_shownLineVisual3D = multiLineVisual3D;
}
else
{
if (_sampleModel == null)
{
var readerObj = new Ab3d.ReaderObj();
_sampleModel = readerObj.ReadModel3D(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"Resources\Models\Teapot.obj"), null, new DiffuseMaterial(Brushes.SkyBlue));
_sampleModel.Freeze();
}
double readObjectRadius = Math.Sqrt(_sampleModel.Bounds.SizeX * _sampleModel.Bounds.SizeX + _sampleModel.Bounds.SizeZ + _sampleModel.Bounds.SizeZ) / 2;
double scaleFactor = sphereRadius / readObjectRadius;
var finalModel = new Model3DGroup();
finalModel.Children.Add(_sampleModel);
finalModel.Transform = new ScaleTransform3D(scaleFactor, scaleFactor, scaleFactor);
finalModel.Freeze();
var wireframeVisual3D = new WireframeVisual3D()
{
OriginalModel = finalModel,
WireframeType = WireframeVisual3D.WireframeTypes.WireframeWithOriginalSolidModel,
UseModelColor = false,
LineColor = Colors.Black,
LineThickness = 0.5
};
// To specify line depth bias to the WireframeVisual3D,
// we use SetDXAttribute extension method and use LineDepthBias as DXAttributeType
wireframeVisual3D.SetDXAttribute(DXAttributeType.LineDepthBias, depthBias);
// It would be also possible to set the depth with changing the DepthBias on the WpfWireframeVisual3DNode.
// This is done with using the SetDepthBias method
//SetDepthBias(dxViewportView, wireframeVisual3D, depthBias);
parentViewport3D.Children.Add(wireframeVisual3D);
_shownLineVisual3D = wireframeVisual3D;
}
_previousCameraDistance = sphereRadius * 4;
targetPositionCamera.Distance = _previousCameraDistance;
targetPositionCamera.Offset = new Vector3D(0, sphereRadius * 0.4, 0);
}
private void CreateTestModels()
{
_rootModelVisual3D = new ModelVisual3D();
MainViewport3D.Children.Add(_rootModelVisual3D);
// SphereVisual3D
var sphereVisual3D = new Ab3d.Visuals.SphereVisual3D()
{
CenterPosition = new Point3D(-50, 0, -50),
Radius = 30,
Material = new DiffuseMaterial(Brushes.Silver)
};
sphereVisual3D.SetName("SphereVisual3D");
_rootModelVisual3D.Children.Add(sphereVisual3D);
var readerObj = new ReaderObj();
var teapotModel = readerObj.ReadModel3D(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"Resources\Models\teapot-hires.obj"));
Ab3d.Utilities.ModelUtils.CenterAndScaleModel3D(teapotModel, centerPosition: new Point3D(50, 0, -50), finalSize: new Size3D(80, 80, 80), preserveAspectRatio: true);
var modelVisual3D = new ModelVisual3D()
{
Content = teapotModel
};
teapotModel.SetName("teapot Model3D");
modelVisual3D.SetName("teapot ModelVisual3D");
_rootModelVisual3D.Children.Add(modelVisual3D);
// InstancedMeshGeometryVisual3D
var boxMesh3D = new Ab3d.Meshes.BoxMesh3D(new Point3D(0, 0, 0), new Size3D(6, 6, 6), 1, 1, 1);
InstanceData[] instancedData = DXEnginePerformance.InstancedMeshGeometry3DTest.CreateInstancesData(center: new Point3D(-50, 0, 50),
size: new Size3D(80, 50, 80),
modelScaleFactor: 1,
xCount: 5,
yCount: 1,
zCount: 5,
useTransparency: false);
var instancedMeshGeometryVisual3D = new InstancedMeshGeometryVisual3D(boxMesh3D.Geometry);
instancedMeshGeometryVisual3D.InstancesData = instancedData;
instancedMeshGeometryVisual3D.SetName("InstancedMeshGeometryVisual3D");
_rootModelVisual3D.Children.Add(instancedMeshGeometryVisual3D);
// MeshObjectNode and SceneNodeVisual3D
var meshGeometry3D = new Ab3d.Meshes.PyramidMesh3D(new Point3D(50, -20, 50), new Size3D(80, 40, 80)).Geometry;
var dxMeshGeometry3D = new Ab3d.DirectX.Models.DXMeshGeometry3D(meshGeometry3D);
var standardMaterial = new StandardMaterial()
{
DiffuseColor = Colors.Gold.ToColor3()
};
var meshObjectNode = new Ab3d.DirectX.MeshObjectNode(dxMeshGeometry3D, standardMaterial);
_disposables.Add(dxMeshGeometry3D);
_disposables.Add(meshObjectNode);
var sceneNodeVisual3D = new SceneNodeVisual3D(meshObjectNode);
sceneNodeVisual3D.SetName("SceneNodeVisual3D");
_rootModelVisual3D.Children.Add(sceneNodeVisual3D);
}
