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Man Pages


Manual Reference Pages  -  GLELATHE (3)

NAME

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

CONTENTS

Syntax
Arguments
Description
See Also
Author

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@fc.net)
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GLE GLELATHE (3GLE) 3.6

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