ANTENNAVIS(1) General Commands Manual ANTENNAVIS(1)NAME
antennavis - Antenna Radiation Pattern Visualization Software
SYNOPSIS
antennavis
DESCRIPTION
Antennavis lets the user fly around and view antenna systems and their patterns from any angle in 3D. There are several means of viewing
the patterns, through rendered, variable-size cubes, smooth shaded polygonal surface approximations, and color-mapped spheres.
Antennavis works together with nec2. Nec2 simulates the electromagnetic response of antennas and metal structures and can be called from
within antennavis. Antennavis then uses the TkAnt OpenGL widget to render the nec output.
AUTHORS
The program was originally developed by Kenneth Harker WM5R and Adrian Agogino. It is currently maintained by Nanakos Chrysostomos,
nanakos@wired-net.gr.
0.3 March 1, 2006 ANTENNAVIS(1)
Check Out this Related Man Page
GLSHADEMODEL(3G) OpenGL Manual GLSHADEMODEL(3G)NAME
glShadeModel - select flat or smooth shading
C SPECIFICATION
void glShadeModel(GLenum mode);
PARAMETERS
mode
Specifies a symbolic value representing a shading technique. Accepted values are GL_FLAT and GL_SMOOTH. The initial value is GL_SMOOTH.
DESCRIPTION
GL primitives can have either flat or smooth shading. Smooth shading, the default, causes the computed colors of vertices to be
interpolated as the primitive is rasterized, typically assigning different colors to each resulting pixel fragment. Flat shading selects
the computed color of just one vertex and assigns it to all the pixel fragments generated by rasterizing a single primitive. In either
case, the computed color of a vertex is the result of lighting if lighting is enabled, or it is the current color at the time the vertex
was specified if lighting is disabled.
Flat and smooth shading are indistinguishable for points. Starting when glBegin() is issued and counting vertices and primitives from 1,
the GL gives each flat-shaded line segment i the computed color of vertex i + 1, its second vertex. Counting similarly from 1, the GL gives
each flat-shaded polygon the computed color of the vertex listed in the following table. This is the last vertex to specify the polygon in
all cases except single polygons, where the first vertex specifies the flat-shaded color.
+--------------------------------------------------+-----------------------------------+
| | |
| Primitive Type of Polygon | Vertex |
| i | |
| | |
+--------------------------------------------------+-----------------------------------+
|Single polygon | 1 |
| ( | |
| | |
| | |
| i | |
| == | |
| 1 | |
| | |
| ) | |
+--------------------------------------------------+-----------------------------------+
|Triangle strip | i |
| | + |
| | 2 |
+--------------------------------------------------+-----------------------------------+
|Triangle fan | i |
| | + |
| | 2 |
+--------------------------------------------------+-----------------------------------+
|Independent triangle | 3 |
| | |
| | i |
+--------------------------------------------------+-----------------------------------+
|Quad strip | 2 |
| | |
| | i |
| | + |
| | 2 |
+--------------------------------------------------+-----------------------------------+
|Independent quad | 4 |
| | |
| | i |
+--------------------------------------------------+-----------------------------------+
Flat and smooth shading are specified by glShadeModel with mode set to GL_FLAT and GL_SMOOTH, respectively.
ERRORS
GL_INVALID_ENUM is generated if mode is any value other than GL_FLAT or GL_SMOOTH.
GL_INVALID_OPERATION is generated if glShadeModel is executed between the execution of glBegin() and the corresponding execution of
glEnd().
ASSOCIATED GETS
glGet() with argument GL_SHADE_MODEL
SEE ALSO
glBegin(), glColor(), glLight(), glLightModel()
COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 06/10/2014 GLSHADEMODEL(3G)