glupartialdisk(3g) [xfree86 man page]

GLUPARTIALDISK(3G)														GLUPARTIALDISK(3G)

NAME

       gluPartialDisk - draw an arc of a disk

C SPECIFICATION

       void gluPartialDisk( GLUquadric* quad,
			    GLdouble inner,
			    GLdouble outer,
			    GLint slices,
			    GLint loops,
			    GLdouble start,
			    GLdouble sweep )

PARAMETERS

       quad    Specifies a quadrics object (created with gluNewQuadric).

       inner   Specifies the inner radius of the partial disk (can be 0).

       outer   Specifies the outer radius of the partial disk.

       slices  Specifies the number of subdivisions around the z axis.

       loops   Specifies the number of concentric rings about the origin into which the partial disk is subdivided.

       start   Specifies the starting angle, in degrees, of the disk portion.

       sweep   Specifies the sweep angle, in degrees, of the disk portion.

DESCRIPTION

       gluPartialDisk  renders	a partial disk on the z=0 plane. A partial disk is similar to a full disk, except that only the subset of the disk
       from start through start + sweep is included (where 0 degrees is along the +yaxis, 90 degrees along the +x axis, 180 degrees along  the	-y
       axis, and 270 degrees along the -x axis).

       The partial disk has a radius of outer, and contains a concentric circular hole with a radius of inner. If inner is 0, then no hole is gen-
       erated. The partial disk is subdivided around the z axis into slices (like pizza slices), and also about the z axis into rings  (as  speci-
       fied by slices and loops, respectively).

       With  respect  to orientation, the +z side of the partial disk is considered to be outside (see gluQuadricOrientation).	This means that if
       the orientation is set to GLU_OUTSIDE, then any normals generated point along the +z axis. Otherwise, they point along the -z axis.

       If texturing is turned on (with gluQuadricTexture), texture coordinates are generated linearly such that where r=outer, the value at (r, 0,
       0) is (1.0, 0.5), at (0, r, 0) it is (0.5, 1.0), at (-r, 0, 0) it is (0.0, 0.5), and at (0, -r, 0) it is (0.5, 0.0).

SEE ALSO

       gluCylinder(3G), gluDisk(3G), gluNewQuadric(3G), gluQuadricOrientation(3G), gluQuadricTexture(3G), gluSphere(3G)

																GLUPARTIALDISK(3G)

XSetDashes()															      XSetDashes()

Name
  XSetDashes - set a pattern of line dashes in a graphics context.

Synopsis
  XSetDashes(display, gc, dash_offset, dash_list, n)
	Display *display;
	GC gc;
	int dash_offset;
	char dash_list[];
	int n;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  gc	    Specifies the graphics context.

  dash_offset
	    Specifies the phase of the pattern for the dashed line style.

  dash_list Specifies the dash list for the dashed line style.	An odd-length list is equivalent to the same list concatenated with itself to
	    produce an even-length list.

  n	    Specifies the length of the dash list argument.

Description
  XSetDashes() sets the dashes component of a GC.  The initial and alternating elements of the dash_list argument are the dashes, the  others
  are  the  gaps.   All of the elements must be non-zero, with lengths measured in pixels.  The dash_offset argument defines the phase of the
  pattern, specifying how many pixels into the dash_list the pattern should actually begin in the line drawn by the request.

  n specifies the length of dash_list.	An odd value for n is interpreted as specifying the dash_list concatenated  with  itself  to  produce
  twice as long a list.

  Ideally,  a dash length is measured along the slope of the line, but server implementors are only required to match this ideal for horizon-
  tal and vertical lines.  Failing the ideal semantics, it is suggested that the length be measured along the major axis of  the  line.   The
  major  axis  is  defined as the x axis for lines drawn at an angle of between -45 and +45 degrees or between 315 and 225 degrees from the x
  axis.  For all other lines, the major axis is the y axis.

  See Volume One, Chapter 5, The Graphics Context, for further information.

Errors
  BadAlloc

  BadGC

  BadValue  No values in dash_list.
	    Element in dash_list is 0.

See Also
  XDefaultGC(), XChangeGC(), XCopyGC(), XCreateGC(), XFreeGC(), XGContextFromGC(), XSetArcMode(), XSetBackground(), XSetClipMask(),  XSetCli-
  pOrigin(),  XSetClipRectangles(),  XSetFillRule(),  XSetFillStyle(), XSetForeground(), XSetFunction(), XSetGraphicsExposures(), XSetLineAt-
  tributes(), XSetPlaneMask(), XSetState(), XSetStipple(), XSetSubwindowMode(), XSetTSOrigin().

Xlib - Graphics Context 													      XSetDashes()