|  | Home If you're new to Python and VPython: Introduction A VPython tutorial Pictures of 3D objects What's new Classic VPython web site VPython license Python web site |  |
sphere |
Here is an example of how to make a sphere: ball = sphere(pos=vector(1,2,1), radius=0.5) This produces a sphere centered at location (1,2,1) with radius = 0.5, with the current foreground color. The sphere object has the following attributes and default values, similar to cylinder: pos vector(0,0,0), axis vector(1,0,0), color vector(1,1,1) which is color.white, red (1), green (1), blue (1), opacity (1), shininess (0.6), emissive (False), texture, and up vector(0,1,0). As with cylinders, up and axis attributes affect the orientation of the sphere but have only a subtle effect on appearance unless a non-smooth texture is specified or the cross section is oval. The magnitude of the axis attribute is irrelevant. Additional sphere attributes: radius The radius of the sphere, default = 1 size Default is vector(2,2,2). Instead of specifying the radius, you can set size=vector(length,height,width), which means that the cross section of the sphere can be elliptical, making it like the ellipsoid object. Unlike other objects, changing size doesn't change axis, changing axis doesn't change size. Note that the pos attribute for cylinder, arrow, cone, and pyramid corresponds to one end of the object, whereas for a sphere it corresponds to the center of the object. If you include make_trail=True when you create the object, a trail will be left behind the object as you move it. For related options, see Leaving a Trail. See Rotating an Object for an easy way to change the orientation of an object. See description of Additional Attributes available for all 3D display objects.