private void UpdateLines()
{
var sphereMesh = new Ab3d.Meshes.SphereMesh3D(new Point3D(0, 0, 0), 100, Convert.ToInt32(SegmentsSlider.Value));
GeometryModel3D wireframeModel = Ab3d.Models.WireframeFactory.CreateWireframe(sphereMesh.Geometry, 1, Colors.White, MainViewport);
MainModel3DGroup.Children.Clear();
MainModel3DGroup.Children.Add(wireframeModel);
// After the line is connected to Viewport3D we can create its geometry.
// This is automatically done with LinesUpdater in its Rendering event handler.
// But to get the linesGeometry.Positions.Count we can call the Refresh method manually to recreate the Geometry.
Ab3d.Utilities.LinesUpdater.Instance.Refresh();
PositionsTextBlock.Text = string.Format("Sphere positions count: {0}", sphereMesh.Geometry.Positions.Count);
var linesGeometry = wireframeModel.Geometry as MeshGeometry3D;
if (linesGeometry == null)
{
LinesTextBlock.Text = "";
}
else
{
LinesTextBlock.Text = string.Format("3D Line Positions count: {0:0}", linesGeometry.Positions.Count / 4); // 4 positions for one line
}
FpsMeter1.Reset(); // Resets the average
}
public BooleanOperationsSample()
{
InitializeComponent();
var boxMesh = new Ab3d.Meshes.BoxMesh3D(new Point3D(0, 0, 0), new Size3D(100, 100, 100), 1, 1, 1).Geometry;
var sphereMesh = new Ab3d.Meshes.SphereMesh3D(new Point3D(0, 0, 0), 65, 16).Geometry;
// Note that we set processOnlyIntersectingTriangles to false because boxMesh and sphereMesh are almost the same size and
// therefore all triangles need to be processes. With false value we skip checking which triangles are intersecting.
// If the sphereMesh would be much smaller than it is recommended to set that to true (this is also the default value so we can skip that).
// See the next (AdvancedBooleanOperations) for more info about that.
// Subtract
var subtractedMesh = Ab3d.Utilities.MeshBooleanOperations.Subtract(boxMesh, sphereMesh, processOnlyIntersectingTriangles: false);
ShowMesh(subtractedMesh, -150);
// Intersect
var intersectedMesh = Ab3d.Utilities.MeshBooleanOperations.Intersect(boxMesh, sphereMesh, processOnlyIntersectingTriangles: false);
ShowMesh(intersectedMesh, 0);
//Union
var unionMesh = Ab3d.Utilities.MeshBooleanOperations.Union(boxMesh, sphereMesh, processOnlyIntersectingTriangles: false);
ShowMesh(unionMesh, 150);
// SEE ALSO:
// AdvancedBooleanOperations.xaml.cs
// UseCases/ModelingWithBooleanOperations.xaml.cs
// Utilities/TextureCoordinatesGeneratorSample (to generate texture coordinates that are lost with boolean operations)
}
private void CreateInstances()
{
MeshGeometry3D meshGeometry3D;
double modelScaleFactor;
if (MeshTypeComboBox.SelectedIndex == 2) // Bunnies
{
// Load standard Standfor Bunny model (res3) with 11533 position
meshGeometry3D = LoadMeshFromObjFile("bun_zipper_res3.obj");
var bounds = meshGeometry3D.Bounds;
double diagonalSize = Math.Sqrt(bounds.SizeX * bounds.SizeX + bounds.SizeY * bounds.SizeY + bounds.SizeZ * bounds.SizeZ);
modelScaleFactor = 20 / diagonalSize; // Scale model so that its diagonal is 20 units big
}
else if (MeshTypeComboBox.SelectedIndex == 1) // Spheres
{
// Sphere with 382
meshGeometry3D = new Ab3d.Meshes.SphereMesh3D(centerPosition: new Point3D(0, 0, 0), radius: 5, segments: 20, generateTextureCoordinates: false).Geometry;
modelScaleFactor = 1;
}
else
{
// Box with 24 positions (for each corner we need 3 positions to create sharp edges - we need 3 normal vectors for each edge)
meshGeometry3D = new Ab3d.Meshes.BoxMesh3D(centerPosition: new Point3D(0, 0, 0), size: new Size3D(10, 10, 10), xSegments: 1, ySegments: 1, zSegments: 1).Geometry;
modelScaleFactor = 1;
}
int selectedInstancesYCount = GetSelectedInstancesYCount();
bool useTransparency = UseTransparencyCheckBox.IsChecked ?? false;
float alphaColor = useTransparency ? 0.3f : 1.0f; // When we use transparency, we set alpha color to 0.3 (we also need to set UseAlphaBlend to true - see below)
// The following method prepare InstanceData array with data for each instance (WorldMatrix and Color)
InstanceData[] instancedData = CreateInstancesData(new Point3D(0, 200, 0), new Size3D(400, 400, 400), (float)modelScaleFactor, 20, selectedInstancesYCount, 20, useTransparency);
// Create InstancedGeometryVisual3D with selected meshGeometry and InstancesData
var instancedMeshGeometryVisual3D = new InstancedMeshGeometryVisual3D(meshGeometry3D);
instancedMeshGeometryVisual3D.InstancesData = instancedData;
// When we use transparency, we also need to set UseAlphaBlend to true
instancedMeshGeometryVisual3D.UseAlphaBlend = useTransparency;
// If we would only change the InstancedData we would need to call Update method (but here this is not needed because we have set the data for the first time)
//_instancedGeometryVisual3D.Update();
ObjectsPlaceholder.Children.Clear();
ObjectsPlaceholder.Children.Add(instancedMeshGeometryVisual3D);
// Update statistics:
//PositionsPerMeshTextBlock.Text = string.Format("Positions per mesh: {0:#,##0}", meshGeometry3D.Positions.Count);
TotalTextBlock.Text = string.Format("Total positions: {0:#,##0} * {1:#,##0} = {2:#,##0}", meshGeometry3D.Positions.Count, 20 * 20 * selectedInstancesYCount, meshGeometry3D.Positions.Count * selectedInstancesYCount * 20 * 20);
}
public BooleanOperationsSample()
{
InitializeComponent();
var boxMesh = new Ab3d.Meshes.BoxMesh3D(new Point3D(0, 0, 0), new Size3D(100, 100, 100), 1, 1, 1).Geometry;
var sphereMesh = new Ab3d.Meshes.SphereMesh3D(new Point3D(0, 0, 0), 65, 16).Geometry;
// Subtract
var subtractedMesh = Ab3d.Utilities.MeshBooleanOperations.Subtract(boxMesh, sphereMesh);
ShowMesh(subtractedMesh, -150);
// Intersect
var intersectedMesh = Ab3d.Utilities.MeshBooleanOperations.Intersect(boxMesh, sphereMesh);
ShowMesh(intersectedMesh, 0);
//Union
var unionMesh = Ab3d.Utilities.MeshBooleanOperations.Union(boxMesh, sphereMesh);
ShowMesh(unionMesh, 150);
}
