Sphere

Figure 1. Sphere part.

This rigid body part can be used in the biomechanical editor to create a musculo-skeletal model. The sphere is a simple 3D graphic primitive with one changeable dimension:  radius. 

You can change the size of the sphere by directly setting its properties in the property toolbar, or you can do it using the mouse. If you right click and drag the mouse on the side of the sphere you can increase or decrease its radius. You can also move the part using the mouse. If you right click on the center selection box you can move the part in the XY plane. To switch to moving it in the XZ plane hold down the "s" key while moving the box. You can also move it in just one dimension by holding down the "x", "y", or "z" key while moving the part. Rotation can be performed using the mouse by left clicking on the center selection box and moving the mouse to rotate the object. Again, you can hold down the "x", "y", or "z" key while moving the mouse to rotate the part on just that axis.

Figure 2. The properties of the sphere part.

General Properties

To see a description of the properties common to all bodies follow this link

Sphere Properties

This property is specific to sphere only.

Radius
The radius of the sphere.  This value can be directly entered by the user or they can use the mouse by clicking on any portion of the sphere and dragging the mouse to the desired radius.
Default value:  5 cm
Acceptable range: any number greater than zero