Create a point by coordinates. You can also select a local coordinate system and give the coordinates related to this local coordinate system.

Create a point using center of circle, ellipse, parabola, hyperbola, sphere, torus, or apex of cone.

Create a reference point at the gravity center or parameter center of the selected shape.

Create reference points at the intersection of the two selected curves or ref-axes. If the two curves are not intersected with each other, you can evaluate related points using the extrema mode. For example, two circles at the same plane, but far from each other, you can get the farthest and nearest points' pairs in two circles using the extrema mode.

Create reference points at the intersection of the selected curve and surface. You can select edge, reference axis, face and reference plane.

Create reference points by picking positions on edge or face.

Create a reference point which locates at the center of the circle which created by selected 3 points. You can select vertex, reference point, node, or pick position on edge or face.

Sample points from curve by methods: Uniform, Curvature and Control Points. Uniform: sample the curve uniformly by distance. Curvature: sample the curve curvaturally. Control Points: if the selected curve is B-spline curve, the sample points are the control points of the B-spline curve. If the curve is not a B-spline curve, the software creates a B-spline curve internally.

Figure 5.1: Sample curve uniformally by given number of points 10

Figure 5.2: Sample curve curvaturally

Figure 5.3: Sample curve by control points

Sample points from surface by methods: Uniform, Curvature and Control Points. Uniform: sample the surface uniformly in U and V direction. Curvature: sample the surface curvaturally. Control Points: if the selected surface is a B-spline surface, the sample points are the control points of the B-spline surface. If it is not a B-spline surface, the software creates a B-spline surface internally.

Create a point which locate at the barycenter of the selected points.

Create middle points between two selected points.

Create an axis through a point and a direction vector by parameters.

Create an axis through a line or linear edge.

Create axes by the selected planes' intersection.

Create an axis by two points.

Create an axis which is the axis of circle/ellipse/cylinder/cone/revolve surface.

Project the selected point to the selected curve. The result ref-axis will pass the projected point and the direction is the tangent direction on the curve. If the curve and the point locate at the same plane, you can also check "Normal to Curve" to create an axis normal to the curve using the point as reference.

Figure 5.4: Tangent with Curve: Project the selected point to the selected curve

Select a plane and a point, the axis will pass the point and normal to the plane.

Select a surface and a point. Project the selected point to the surface. The axis will pass the projected position and normal to the surface.

Select a plane and a point, the axis will pass the point and normal to the plane.

Create an axis normal to the two selected lines and pass the intersection point of the two lines. Checking "Middle" will make the axis locate at the same plane with two selected lines and equal angle with two lines.

Create a plane by an origin point and a normal vector. You can also sketch ref-planes when "Sketch" is checked.

Creates a reference plane passing the selected point and the selected line.

Creates a reference plane which passes the selected point and normals to the selected line.

Create a plane passing through a point and parallel to a plane.

Select a point (the yellow ref-point) and a plane (the highlight front plane) to create a parallel plane.

Create a new plane by rotating an existed plane with a selected axis.

Select a line (the top-right edge of the box) and a plane (the highlight front plane) to create a rotation plane.

Create several planes parallel to a selected plane, and offset by a specified distance.

Select a plane to offset 5 planes.

Create a plane through a point and perpendicular to a curve.

Ref-plane normal to the curve at the end point.

Create a plane on a non-planar face or angular surface.

Select the ref-point and the surface to create tangent ref-plane.

Create a plane passing through 3 selected points.

Plane by 3 Points

Create a plane normal to a virtual line segment built by 2 points.

Create a plane by equation. You can also define any point which the plane should pass through.

Create a plane passing through two lines. If the two selected lines are not located at the same plane, the first line will be selected as the reference.

Create a coordinate system through an origin point, a Z-axis and a X-axis parameters.

Create a coordinate system by selecting an origin point, a Z-axis line, and a X-axis line. By default, you can select only an origin point and Z-axis line, the X-axis line will be calculated by Z-axis.

Create a coordinate system by select a point on the selected curve or the selected surface. The selected point is firstly projected to the curve or surface. For the curve, the projected point will be treated as the origin, the tangent vector of the project position on the curve will be treated as the Z-direction. And the X-axis is chosen randomly. For the surface, the projected point will be treated as the origin, the X-axis and the Y-axis are the U and V tangent vectors of the project position on the surface.

Figure 5.5: Select the vertex from the helix, using In Cur/Surf method to create a local coordinate system

Figure 5.6: Use this coordinate system to create a circle

Figure 5.7: Select the circle and the helix, use Surface, Sweep to create the spring surface

Create a coordinate system by 3 points. You can choose type as XOY, YOZ, or ZOX.

Create a series of coordinate systems in the selected curve.

Create a series of coordinate systems in the selected surface.

Using principal component analysis (PCA) method to calculate a principal axes coordinate system by the selected entities.

The Euler angles are three angles that describe the orientation of a rigid body with respect to a fixed coordinate system. They can also represent the orientation of a mobile frame of reference in physics or the orientation of a general basis in 3-dimensional linear algebra.

There are six possibilities of choosing the rotation axes for Proper Euler Angles. In all of them, the first and third rotation axes are the same. The six possible sequences are:

There are six possibilities of choosing the rotation axes for Tait–Bryan Angles. The six possible sequences are: