46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
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// fl_arci.C
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// "integer" circle drawing functions. These draw the limited
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// circle types provided by X and NT graphics. The advantage of
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// these is that small ones draw quite nicely (probably due to stored
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// hand-drawn bitmaps of small circles!) and may be implemented by
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// hardware and thus are fast.
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// Probably should add fl_chord.
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// 3/10/98: created
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#include <FL/fl_draw.H>
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#include <FL/x.H>
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#ifdef WIN32
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#include <FL/math.h>
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#endif
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void fl_arc(int x,int y,int w,int h,double a1,double a2) {
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if (w <= 0 || h <= 0) return;
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#ifdef WIN32
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int xa = x+w/2+int(w*cos(a1/180.0*M_PI));
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int ya = y+h/2-int(h*sin(a1/180.0*M_PI));
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int xb = x+w/2+int(w*cos(a2/180.0*M_PI));
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int yb = y+h/2-int(h*sin(a2/180.0*M_PI));
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Arc(fl_gc, x, y, x+w, y+h, xa, ya, xb, yb);
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#else
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XDrawArc(fl_display, fl_window, fl_gc, x,y,w-1,h-1, int(a1*64),int((a2-a1)*64));
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#endif
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}
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void fl_pie(int x,int y,int w,int h,double a1,double a2) {
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if (w <= 0 || h <= 0) return;
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#ifdef WIN32
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if (a1 == a2) return;
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int xa = x+w/2+int(w*cos(a1/180.0*M_PI));
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int ya = y+h/2-int(h*sin(a1/180.0*M_PI));
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int xb = x+w/2+int(w*cos(a2/180.0*M_PI));
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int yb = y+h/2-int(h*sin(a2/180.0*M_PI));
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SelectObject(fl_gc, fl_brush());
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Pie(fl_gc, x, y, x+w, y+h, xa, ya, xb, yb);
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#else
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XFillArc(fl_display, fl_window, fl_gc, x,y,w,h, int(a1*64),int((a2-a1)*64));
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#endif
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}
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