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- /**
- ** PATFARC.C
- **
- ** Copyright (C) 1992, Csaba Biegl
- ** 820 Stirrup Dr, Nashville, TN, 37221
- ** csaba@vuse.vanderbilt.edu
- **
- ** This file is distributed under the terms listed in the document
- ** "copying.cb", available from the author at the address above.
- ** A copy of "copying.cb" should accompany this file; if not, a copy
- ** should be available from where this file was obtained. This file
- ** may not be distributed without a verbatim copy of "copying.cb".
- ** You should also have received a copy of the GNU General Public
- ** License along with this program (it is in the file "copying");
- ** if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- ** Cambridge, MA 02139, USA.
- **
- ** This program is distributed in the hope that it will be useful,
- ** but WITHOUT ANY WARRANTY; without even the implied warranty of
- ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ** GNU General Public License for more details.
- **/
-
- #include "grx.h"
- #include "libgrx.h"
- #include "clipping.h"
-
- void GrPatternFilledEllipseArc(int xc,int yc,int xa,int ya,int start,int end,GrPattern *p)
- {
- int pt[MAX_ELLIPSE_PTS+1][2];
- int x1,x2,y1,y2,nn;
- MOUSE_FLAG;
-
- if(xa < 0) xa = (-xa);
- if(ya < 0) ya = (-ya);
- x1 = xc - xa; y1 = yc - ya;
- x2 = xc + xa; y2 = yc + ya;
- CLIPSORTEDBOX(CURC,x1,y1,x2,y2);
- MOUSE_BLOCK(CURC,x1,y1,x2,y2);
- nn = _GrGenerateEllipseArc(pt,xc,yc,xa,ya,start,end);
- if(nn < 0)
- GrPatternFilledConvexPolygon((-nn),pt,p);
- else if(nn == 1)
- GrPatternFilledPlot(pt[0][0],pt[0][1],p);
- else {
- pt[nn][0] = xc;
- pt[nn][1] = yc;
- GrPatternFilledPolygon(++nn,pt,p);
- }
- MOUSE_UNBLOCK();
- }
-
- void GrPatternFilledCircleArc(int xc,int yc,int r,int start,int end,GrPattern *p)
- {
- GrPatternFilledEllipseArc(xc,yc,r,r,start,end,p);
- }
-