gleextrusion(3gle) [debian man page]

gleExtrusion(3GLE)							GLE							gleExtrusion(3GLE)

NAME

       gleExtrusion - Extrude arbitrary 2D contour along arbitrary 3D path.

SYNTAX

       void gleExtrusion (int ncp,
		       gleDouble contour[][2],
		       gleDouble cont_normal[][2],
		       gleDouble up[3],
		       int npoints,
		       gleDouble point_array[][3],
		       float color_array[][3]);

ARGUMENTS

       ncp	 number of contour points

       contour	 2D contour

       cont_normal
		 2D contour normals

       up	 up vector for contour

       npoints	 numpoints in poly-line

       point_array
		 polyline vertices

       color_array
		 colors at polyline verts

DESCRIPTION

       Extrude	arbitrary  2D  contour along arbitrary 3D path. The argument "contour" specifies the 2D contour to be extruded, while the argument
       "point_array" specifies the path along which to extrude.  The vector "up" defines the orientation of the contour y-axis in real 3D space.

       Note that neither the very first segment, nor the very last segment are drawn. The first and last segments serve only to define	the  angle
       of the join at the very ends of the polyline. Thus, to draw one segment, three must be specified. To draw two segments, four must be speci-
       fied, etc.

       The normal array may be NULL. If it is, normal vectors will NOT be automatically generated, and the object will look terrible when lit.

       The color array may be NULL. If NULL, the current color is used. If not NULL, the glColor3f() routine is used to set the color;	therefore,
       specifying the glColorMaterial() subroutine before this primitive can be used to set diffuse, specular, ambient, etc. colors.

SEE ALSO

       gleTwistExtrusion, gleSuperExtrusion

AUTHOR

       Linas Vepstas (linas@linas.org)

GLE
									3.0							gleExtrusion(3GLE)

gleLathe(3GLE)								GLE							    gleLathe(3GLE)

NAME

       gleLathe - Sweep using a Z-axis shear to create an arbitrary contour along a helical path.

SYNTAX

       void gleLathe (int ncp,
		       gleDouble contour[][2],
		       gleDouble cont_normal[][2],
		       gleDouble up[3],
		       gleDouble startRadius,	  /* spiral starts in x-y plane */
		       gleDouble drdTheta,	  /* change in radius per revolution */
		       gleDouble startZ,	  /* starting z value */
		       gleDouble dzdTheta,	  /* change in Z per revolution */
		       gleDouble startXform[2][3], /* starting contour affine xform */
		       gleDouble dXformdTheta[2][3], /* tangent change xform per revoln */
		       gleDouble startTheta,	  /* start angle in x-y plane */
		       gleDouble sweepTheta);	  /* degrees to spiral around */

ARGUMENTS

       ncp	 number of contour points

       contour	 2D contour

       cont_normal
		 2D contour normals

       up	 up vector for contour

       startRadius
		 spiral starts in x-y plane

       drdTheta  change in radius per revolution

       startZ	 starting z value

       dzdTheta  change in Z per revolution

       startXform
		 starting contour affine transformation

       dXformdTheta
		 tangent change xform per revolution

       startTheta
		 start angle in x-y plane

       sweepTheta
		 degrees to spiral around

DESCRIPTION

       Sweep  an  arbitrary  contour along a helical path. The sweep will be performed as a shear along the z-axis, so that the orientation of the
       contour is displaced, rather than translated, as the contour is swept.

       The axis of the helix lies along the modeling coordinate z-axis.

       An affine transform can be applied as the contour is swept. For most ordinary usage, the affines should be given as NULL.

SEE ALSO

       gleSpiral

AUTHOR

       Linas Vepstas (linas@linas.org)

GLE
									3.0							    gleLathe(3GLE)