Topic       : TOS - The Operating System
Author      : 
Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
Nodes       : 3010
Index Size  : 93790
HCP-Version : 5
Compiled on : Atari
@charset    : atarist
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View Ref-File7.5.3  v_arc                                                       TOS

 Name:         »Arc« - Draw a circular arc.

 Opcode:       11 (GDP 2)

 Syntax:       void v_arc ( int16_t handle, int16_t x, int16_t y, 
               int16_t radius, int16_t begang, int16_t endang );

 Description:  The call v_arc draws an arc of a circle. The following 
               apply:

                Parameter  Meaning

                handle     Workstation identifier
                x          X-coordinate, and
                y          Y-coordinate of arc's center point
                radius     Length of arc's radius in X-axis units
                begang     Starting angle in tenths of degrees 
                           (0-3600)
                endang     Ending angle in tenths of degrees (0-3600)

               Note: The lines attributes, the writing mode as well as 
               the actual pixel size are taken into account for 
               drawing. The specification for the radius refers to the 
               X-axis. The angle is specified in 1/10 degrees in the 
               anticlockwise direction.

                            900
                           |
                           |
                           |
                  ---------+---------
               1800        |        0
                           |
                           |
                            2700

 Return value: The function does not return a result.

 Availability: Supported by all drivers. This function comprises one 
               of the 10 VDI GDP's (Generalized Drawing Primitives). 
               Although all current drivers support all GDP's, their 
               availability is not guaranteed and may vary. To check 
               for a particular GDP refer to the table returned by 
               v_opnvwk or v_opnwk.

 Group:        Output functions

 See Also:     Binding   vs_color   vswr_mode   vsl_type   vsl_width 
               vsl_color   vsl_ends   vsl_udsty