"SfR Fresh" - the SfR Freeware/Shareware Archive

Member "gle-3.1.0/man/gleLathe.man" of archive gle-3.1.0.tar.gz:

Caution: As a special service "SfR Fresh" has tried to format the requested manual source page into HTML format but links to other man pages may be missing or even errorneous. Alternatively you can here view or download the uninterpreted manual source code. That can be also achieved for any archive member file by clicking within an archive contents listing on the first character of the file(path) respectively on the according byte size field.

Table of Contents

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)

Table of Contents