Plane Defined by Two Points and an Angle
- Last UpdatedNov 29, 2023
- 2 minute read
Another option is to define a plane by two points and an angle in the plane defined by two of the co-ordinate axes. The following form is used for input:
Figure 2:33. Form for creation of plane defined by two points and angle.
1st Axis, 2nd Axis and Angle fields: Definition of the angles of the plane. The angles and the planes in which the angles are measured are defined as follows:
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If the Axis field is set to X, the angle is in the XY-plane. Looking in negative direction along the z-axis, an angle > 0 means turning counter clockwise and < 0 means clockwise. An angle of 0 means in the positive direction of the x-axis.
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If the Axis field is set to Y, the angle is in the YZ-plane. Looking in negative direction along the x-axis, an angle > 0 means turning counter clockwise and < 0 means clockwise. An angle of 0 means in the positive direction of the y-axis.
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If the Axis field is set to Z, the angle is in the XZ-plane. Looking in negative direction along the y-axis, an angle > 0 means turning counter clockwise and < 0 means clockwise. An angle of 0 means in the positive direction of the z-axis.
Note: that the second angle will not have any effect on the plane or a curve created by intersecting the plane with a surface. When modelling a shell profile by such a curve, however, the inclination angles in the endpoints will automatically be set to the angles given in the plane definition.
The Ok button: Accept the input and create the plane.
The Cancel button: Exit the function without creating a plane.
When modifying an existing plane of this type, the following form is used:
Figure 2:34. Pop-up menu for modification of plane defined by two points and angle.
By selecting Modify Point 1 or Modify Point 2 you can modify the corresponding definition point. The push-button Modify Angle lets you change the angle in the plane definition. The Select Type button lets you change the type of the plane to any of the plane types described in this section. Finally, Ok quits the Modify function and recreates the plane.