mjbWorld - cylinderBean

stores a cylinder

The Cylinder node specifies a capped cylinder centred at (0,0,0) in the local coordinate system and with a central axis oriented along the local
Y-axis. By default, the cylinder is sized at "-1" to "+1" in all three dimensions. The radius field specifies the radius of the cylinder and the height
field specifies the height of the cylinder along the central axis. Both radius and height shall be greater than zero. Figure 6.4 illustrates the Cylinder
node.

The cylinder has three parts: the side, the top (Y = +height/2) and the bottom (Y = -height/2). Each part has an associated SFBool field that
indicates whether the part exists (TRUE) or does not exist (FALSE). Parts which do not exist are not rendered and not eligible for intersection
tests (e.g., collision detection or sensor activation).

When a texture is applied to a cylinder, it is applied differently to the sides, top, and bottom. On the sides, the texture wraps counterclockwise
(from above) starting at the back of the cylinder. The texture has a vertical seam at the back, intersecting the X=0 plane. For the top and bottom
caps, a circle is cut out of the unit texture squares centred at (0, +/- height/2, 0) with dimensions 2 × radius by 2 × radius. The top texture
appears right side up when the top of the cylinder is tilted toward the +Z-axis, and the bottom texture appears right side up when the top of the
cylinder is tilted toward the -Z-axis. TextureTransform affects the texture coordinates of the Cylinder node.

The Cylinder node's geometry requires outside faces only. When viewed from the inside the results are undefined.

 

Classes written for this program

Java3D classes (scene graph structure)

VRML2 definition

 Cylinder { 

 field SFBool bottom TRUE 

 field SFloat height 2 

 field SFloat radius 1 

 field SFBool side TRUE 

 field SFloat top TRUE 

 }