Provides access to methods for transforming 3D geometries using either specific parameters or arbitrary transformation objects.
Product Availability
Members
| Description | ||
|---|---|---|
 |
Move3D | Moves the object by dx, dy and dz along the x, y, and z axes respectively. |
|
MoveVector3D | Moves the object by an offset defined by a 3D vector. |
|
ProjectToPlane | Generates a polygon footprint for the object in an arbitrary plane. The footprint may have multiple parts. |
|
RotateVector3D | Rotates the object about axis defined by the specified vector through an angle measured in radians. |
|
Scale3D | Scales the object about the specified origin point. sx, sy, and sz are the scaling factors for the x, y, and z dimensions repectively. |
|
Transform3D | Applies an arbitrary 3D transformation. |
CoClasses that implement ITransform3D
| CoClasses and Classes | Description |
|---|---|
| MultiPatch | A collection of surface patches. |
| Multipoint | An ordered collection of points; optionally has measure, height and ID attributes. |
| Path | A sequence of connected segments. |
| Point | A two dimensional point, optionally with measure, height, and ID attributes. |
| Polygon | A collection of rings ordered by their containment relationship; optionally has measure, height and ID attributes. |
| Polyline | An ordered collection of paths; optionally has measure, height and ID attributes. |
| Ring | An area bounded by one, closed sequence of connected segments; optionally has measure, height and ID attributes at each vertex. |
| TriangleFan | A continuous 3D fan of triangles, where each triangle after the first shares an edge with the preceding triangle, and all triangles share a common pivot point. |
| Triangles | A collection of 3D triangles, where each consecutive triplet of vertices defines a new triangle |
| TriangleStrip | A continuous 3D strip of triangles, where each triangle after the first shares an edge with the preceding triangle. |
Remarks
These methods are intended to be called against top-level geometries only (Point, Polyline, Polygon, MultiPatch). To call a method against a Segment/Path or Ring, first add the part to a Polyline or Polygon container, respectively, and then call the appropriate method against the container.
public static void TransformMultiPatchGeometry()
{
const double XScale = 0.5;
const double YScale = 0.5;
const double ZScale = 2;
const double XOffset = -5;
const double YOffset = -5;
const double ZOffset = -8;
const double DegreesOfRotation = 90;
//Transform3D: Cylinder Scaled, Rotated, Repositioned Via Move3D(), Scale3D(), RotateVector3D()
IGeometry geometry = GetMultiPatchGeometry();
ITransform3D transform3D = geometry as ITransform3D;
//Stretch The Cylinder So It Looks Like A Tube
IPoint originPoint = ConstructPoint3D(0, 0, 0);
transform3D.Scale3D(originPoint, XScale, YScale, ZScale);
//Rotate The Cylinder So It Lies On Its Side
IVector3D axisOfRotationVector3D = ConstructVector3D(0, 10, 0);
double angleOfRotationInRadians = GetRadians(DegreesOfRotation);
transform3D.RotateVector3D(axisOfRotationVector3D, angleOfRotationInRadians);
//Reposition The Cylinder So It Is Located Underground
transform3D.Move3D(XOffset, YOffset, ZOffset);
}
private static IPoint ConstructPoint3D(double x, double y, double z)
{
IPoint point = ConstructPoint2D(x, y);
point.Z = z;
return
point;
}
private static IPoint ConstructPoint2D(double x, double y)
{
IPoint point = new PointClass();
point.PutCoords(x, y);
return point;
}
private static double GetRadians(double decimalDegrees)
{
return decimalDegrees * (Math.PI / 180);
}
private static IVector3D ConstructVector3D(double xComponent, double yComponent, double zComponent)
{
IVector3D vector3D = new Vector3DClass();
vector3D.SetComponents(xComponent, yComponent,
zComponent);
return vector3D;
}