ARC

Syntax

int_val = ARC( x,y, u,v, a );

Input arguments

float	x,y	The coordinates for the starting point of the arc.
float	u,v	The coordinates for the center of the curvature.
float	a	The angle of the arc in degrees.

Return Values

Success:

int

0

Arc drawn successfully.

Description

This function draws an arc. Appearance is affected by the following attributes:

color
pen

ARC and CIRCLE can also be used to hatch faces, not only polylines, provided that the lines touch each other to complete the face.

Example

Copy

hatch_test( )
{
         START_FACE();         
         
         POLY( -20, 0, 
               -50, 0,
               -50, 50,
                   50, 50,                                    
                50, 0,                                    
                20, 0);
                
         ARC( 20, 0, 
               0, 0, 180);
               
         START_HOLE();
         CIRCLE( 0, 40, 5);                                  
         
         style= 0;         /* not used currently */       
         o_x = 0.0;     /* not used currently */       
         o_y = 0.0;     /* not used currently */
         ang = 45.0;
         spc = 2.0;
         HATCH_FACE( style, o_x, o_y, ang, spc ); 
}