An SoVRMLExtrusion is defined by a 2D crossSection piecewise linear curve (described as a series of connected vertices), a 3D spine piecewise linear curve (also described as a series of connected vertices), a list of 2D scale parameters, and a list of 3D orientation parameters.
If the crossSection is counterclockwise when viewed from the +Y axis, then the polygons will have counterclockwise ordering when viewed from 'outside' of the shape (and vice versa for clockwise ordered crossSection curves).
When crossSection is closed, the texture has a seam that follows the line traced by the crossSection's start/end point as it travels along the spine.
To get relative crosssections, you will need to correct the integrals for the detection efficiency, which is energy dependent.
Plot relative crosssections versus angle, as in fig.
Plot the photofraction versus energy and try to interpret your graph using tabulated values of the photoelectric and Compton scattering crosssections from the literature or from a URL such as http://www.csrri.iit.edu/periodic-table.html.
One element of crosssection design that is often overlooked is the accommodation of public utilities.
Decisions that designers need to make may include the number of lanes proposed for the improvement, the width of travel lanes and shoulder areas, the type of drainage proposed, or the desirability of including sidewalks or bicycle/pedestrian paths as part of the project.
One option, as has been discussed previously, is to reconsider the functional classification and design speed of a particular section of highway, because these decisions go a long way toward defining the basic design parameters that can be used in connection with an improvement of the facility.
Floppy's Web3D Guide - The VRML Developer's Library(Site not responding. Last check: 2007-11-02)
The torus is created using the extrusion, but the extrusion parameters are created by the script.
In the script's initialize() function, we calculate the spine and the crossSection of the torus.
Both of these will be circular - different shapes are left up to the user to create with scaling etc. Creating the circles is easy - simply work out the angle between each point on the surface (2pi / num_segments).
[No title](Site not responding. Last check: 2007-11-02)
The blueprint copy was in the collection of Leonard Miekiszak and was donated to the Burlington Route Historical Society.
Nine contain major sections of the drawing: O1s1 - O1s5 cover the side view, O1fr is the front crosssection, O1ap is a crosssection at the air pump, O1vg is a crosssection at the valve gear, and O1cab is a crosssection at the cab.
Block and stamp are the data block and the copy stamp on the blueprint.
A typical main program in XITE, with the ingredients from the above sections Reading and writing BIFF images and Standardized command line user interface, will look something like this (an excerpt from
/*P:crossSection* ________________________________________________________________ crossSection ________________________________________________________________ Name: crossSection - Find cross sections, row or column of image Syntax: crossSection [
Options: and-M cross-section maximum (default) and-n num pick row or column number 'num' and-t title Title of output image and-s scale Scale curve height relative to image height (default is 1.0, which means that the curve peak will touch the top edge of the image).