public void CreateExtrudedModel()
{
Vector3D extrudeVector, shapeYVector3D;
bool isSuccess = GetExtrudeAndUpVectors(out extrudeVector, out shapeYVector3D);
if (!isSuccess)
{
return;
}
bool isSmooth = IsSmoothCheckBox.IsChecked ?? false;
Vector3D modelOffset = new Vector3D(0, 0, 0);
// Adjust shape positions so that (0,0) is at the center of the area
// We also invert y so that y increased upwards (as the blue arrows shows) and not downwards as in Canvas coordinate system
var centeredShapePositions = InvertYAndCenterPoints(_shapePositions);
try
{
MeshGeometry3D extrudedMesh = Mesh3DFactory.CreateExtrudedMeshGeometry(positions: centeredShapePositions,
isSmooth: isSmooth,
modelOffset: modelOffset,
extrudeVector: extrudeVector,
shapeYVector: shapeYVector3D,
textureCoordinatesGenerationType: ExtrudeTextureCoordinatesGenerationType.Cylindrical,
addBottomTriangles: AddBottomTrianglesCheckBox.IsChecked ?? false,
addTopTriangles: AddTopTrianglesCheckBox.IsChecked ?? false);
CreateGeometryModel(extrudedMesh);
_isExtrudedModelShown = true;
}
catch (Exception ex)
{
MessageBox.Show("Error extruding shape:\r\n" + ex.Message);
}
}
public ExtrudeAlongPathSample()
{
InitializeComponent();
// First prepare two 2D shapes:
var letterTShapePositions = new Point[]
{
new Point(5, 0),
new Point(-5, 0),
new Point(-5, 40),
new Point(-20, 40),
new Point(-20, 50),
new Point(20, 50),
new Point(20, 40),
new Point(5, 40),
};
var ellipsePositionList = new List <Point>();
for (int i = 0; i < 360; i += 20)
{
ellipsePositionList.Add(new Point(Math.Sin(i / 180.0 * Math.PI) * 20, Math.Cos(i / 180.0 * Math.PI) * 10));
}
// Now define a simple 3D path:
var extrudePath = new Point3D[]
{
new Point3D(0, 0, 0),
new Point3D(0, 90, 0),
new Point3D(-20, 110, 0),
new Point3D(-50, 130, 20),
new Point3D(-50, 130, 100),
};
// Create extruded models:
MeshGeometry3D extrudedMesh1 = Mesh3DFactory.CreateExtrudedMeshGeometry(
shapePositions: ellipsePositionList,
extrudePathPositions: extrudePath,
shapeYVector3D: new Vector3D(0, 0, -1),
isClosed: true,
isSmooth: true);
CreateGeometryModel(extrudedMesh1, offset: new Vector3D(-150, 0, -50), setBackMaterial: false);
var extrudedMesh2 = Mesh3DFactory.CreateExtrudedMeshGeometry(
shapePositions: ellipsePositionList,
extrudePathPositions: extrudePath,
shapeYVector3D: new Vector3D(0, 0, -1),
isClosed: false,
isSmooth: false);
// Because this mesh will not be closed, we will be able to see inside - so set the back material to dim gray.
CreateGeometryModel(extrudedMesh2, offset: new Vector3D(0, 0, -50), setBackMaterial: true);
// Until now we only provided the shape positions to the CreateExtrudedMeshGeometry.
// This method then triangulated the shape in case it was closed.
// Here we manually triangulate the shape and provide the shapeTriangleIndices to CreateExtrudedMeshGeometry:
var triangulator = new Ab3d.Utilities.Triangulator(letterTShapePositions);
// NOTE: CreateTriangleIndices can throw FormatException when the positions are not correctly defined (for example if the lines intersect each other).
List <int> triangleIndices = triangulator.CreateTriangleIndices();
MeshGeometry3D extrudedMesh = Mesh3DFactory.CreateExtrudedMeshGeometry(
shapePositions: letterTShapePositions,
shapeTriangleIndices: triangleIndices,
extrudePathPositions: extrudePath,
shapeYVector3D: new Vector3D(0, 0, -1),
isClosed: true,
isSmooth: false,
flipNormals: triangulator.IsClockwise); // If true than normals are flipped - used when positions are defined in a counter clockwise order
CreateGeometryModel(extrudedMesh, offset: new Vector3D(150, 0, -50), setBackMaterial: false);
}
private void CreateScene()
{
// Create material with 10 x 10 numbers grid
var imageBrush = new ImageBrush(new BitmapImage(new Uri(@"pack://application:,,,/Resources/10x10-texture.png")));
var material = new DiffuseMaterial(imageBrush);
//var material = new DiffuseMaterial(Brushes.Silver);
// Create box with 10 x 10 x 10 cells
var boxVisual3D = new BoxVisual3D()
{
UseCachedMeshGeometry3D = false, // This will generate a new MeshGeometry3D for this BoxVisual3D,
FreezeMeshGeometry3D = false, // This will allow us to change the TextureCoordinates
CenterPosition = new Point3D(-150, 0, -50),
Size = new Size3D(60, 60, 60),
XCellsCount = 10,
YCellsCount = 10,
ZCellsCount = 10,
Material = material,
};
MainViewport.Children.Add(boxVisual3D);
var cylinderVisual3D = new CylinderVisual3D()
{
BottomCenterPosition = new Point3D(-50, -30, -50),
Radius = 30,
Height = 60,
Segments = 10,
IsSmooth = false,
Material = material
};
MainViewport.Children.Add(cylinderVisual3D);
var sphereVisual3D = new SphereVisual3D()
{
UseCachedMeshGeometry3D = false, // This will generate a new MeshGeometry3D for this BoxVisual3D,
FreezeMeshGeometry3D = false, // This will allow us to change the TextureCoordinates
CenterPosition = new Point3D(50, 0, -50),
Radius = 30,
Material = material
};
MainViewport.Children.Add(sphereVisual3D);
// Add dragon model
string fileName = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Resources\\ObjFiles\\dragon_vrip_res3.obj");
var objModelVisual3D = new ObjModelVisual3D()
{
Source = new Uri(fileName, UriKind.Absolute),
SizeX = 70,
Position = new Point3D(-150, 0, 100),
PositionType = ObjModelVisual3D.VisualPositionType.Center,
DefaultMaterial = material,
};
Ab3d.Utilities.ModelUtils.ChangeMaterial(objModelVisual3D.Content, material, newBackMaterial: null);
MainViewport.Children.Add(objModelVisual3D);
// Add simple extruded shape
var extrudePositions = new Point[]
{
new Point(-1, 54),
new Point(13, 35),
new Point(8, 32),
new Point(18, 13),
new Point(11, 9),
new Point(23, -13),
new Point(6, -14),
new Point(6, -29),
new Point(-8, -30),
new Point(-7, -13),
new Point(-25, -9),
new Point(-12, 9),
new Point(-25, 16),
new Point(-8, 31),
new Point(-16, 38)
};
var extrudedMesh = Mesh3DFactory.CreateExtrudedMeshGeometry(positions: extrudePositions.ToList(),
isSmooth: false,
modelOffset: new Vector3D(-50, -15, 100),
extrudeVector: new Vector3D(0, 30, 0),
shapeYVector: new Vector3D(0, 0, -1),
textureCoordinatesGenerationType: ExtrudeTextureCoordinatesGenerationType.AddAdditionalPositions);
var geometryModel3D = new GeometryModel3D(extrudedMesh, material);
var modelVisual3D = new ModelVisual3D();
modelVisual3D.Content = geometryModel3D;
MainViewport.Children.Add(modelVisual3D);
}