09-03-2002
shell
does any one hav any idea how to display a prompt in unix, such as hello$ instead of the normal $ sign?
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LEARN ABOUT OSX
glutessnormal
GLUTESSNORMAL(3G) GLUTESSNORMAL(3G)
NAME
gluTessNormal - specify a normal for a polygon
C SPECIFICATION
void gluTessNormal( GLUtesselator* tess,
GLdouble valueX,
GLdouble valueY,
GLdouble valueZ )
PARAMETERS
tess Specifies the tessellation object (created with gluNewTess).
valueX Specifies the first component of the normal.
valueY Specifies the second component of the normal.
valueZ Specifies the third component of the normal.
DESCRIPTION
gluTessNormal describes a normal for a polygon that the program is defining. All input data will be projected onto a plane perpendicular
to one of the three coordinate axes before tessellation and all output triangles will be oriented CCW with respect to the normal (CW orien-
tation can be obtained by reversing the sign of the supplied normal). For example, if you know that all polygons lie in the x-y plane, call
gluTessNormal(tess, 0.0, 0.0, 1.0) before rendering any polygons.
If the supplied normal is (0.0, 0.0, 0.0) (the initial value), the normal is determined as follows. The direction of the normal, up to its
sign, is found by fitting a plane to the vertices, without regard to how the vertices are connected. It is expected that the input data
lies approximately in the plane; otherwise, projection perpendicular to one of the three coordinate axes may substantially change the geom-
etry. The sign of the normal is chosen so that the sum of the signed areas of all input contours is nonnegative (where a CCW contour has
positive area).
The supplied normal persists until it is changed by another call to gluTessNormal.
SEE ALSO
gluTessBeginPolygon, gluTessEndPolygon
GLUTESSNORMAL(3G)