Basic Measurements

Table of Contents

• Bounding Box
• Surface Area
• Volume
• Centroid
• Distance
• Angle

MTK allows to compute some key properties of a 3D model:

• bounding box;
• surface area;
• volume;
• centroid (center of mass).

Each property can be computed either for an entire ModelData::Model or for any ModelData::Assembly , ModelData::Part , and ModelData::Instance .

Bounding Box

Bounding box is the smallest axis-aligned box that fully contains a 3D model (or its component).

The following example demonstrates computation of a shape bounding box:

using namespace cadex;
 
ModelData::Shape aShape = ...;
ModelData::Box aBox;
Geom::Transformation aTrsf;
Measurements::BoundingBox::Compute (aShape, aTrsf, aBox);

In addition to traditional bounding boxes, Manufacturing Toolkit also allows to compute minimum bounding box which is not necessarily axis-aligned:

using namespace cadex;
 
ModelData::Shape aShape = ...;
ModelData::Box aBox;
Geom::Transformation aTrsf;
Measurements::BoundingBox::ComputeMin (aShape, aBox, aTrsf);

Surface Area

The following example demonstrates computation of a shape surface area:

using namespace cadex;
 
ModelData::Shape aShape = ...;
double r = Measurements::SurfaceArea::Compute (aShape);

Volume

The following example demonstrates computation of a shape volume:

using namespace cadex;
 
ModelData::Shape aShape = ...;
double r = Measurements::Volume::Compute (aShape);

Centroid

The following example demonstrates computation of a shape centroid (center of mass) :

using namespace cadex;
 
ModelData::Shape aShape = ...;
Geom::Point aCentroid = Measurements::ValidationProperties::ComputeCentroid (aShape);

Distance

The following example demonstrates the computation of the distance between two shapes:

using namespace cadex;
 
ModelData::Shape aFirstShape = ...;
ModelData::Shape aSecondShape = ...;
double aDistance = Measurements::Distance::Compute (aFirstShape, aSecondShape)

Angle

The following example demonstrates the computation of the angle between two planar faces:

using namespace cadex;
 
ModelData::Face aFirstFace = ...;
ModelData::Face aSecondFace = ...;
double anAngle = Measurements::Angle::Compute (aFirstFace, aSecondFace)