1 files changed, 79 insertions, 0 deletions
diff --git a/app/mpg/1987/src/std primitives b/app/mpg/1987/src/std primitives
new file mode 100644
index 0000000..dca20bd
--- /dev/null
+++ b/app/mpg/1987/src/std primitives
@@ -0,0 +1,79 @@
+PROC std circle (INT CONST xp,yp,r,from,to): 
+   moveto (xp,yp);
+   REAL VAR ang :: real (from MOD 360),
+            rad :: real(r),
+            max :: endwinkel,
+            cx  :: real (xp),
+            cy  :: real (yp),
+            ax0 :: cx,
+            ay0 :: cy,
+            ax1, ay1;
+
+   BOOL VAR fullcircle :: ang = 0.0 AND max = 360.0;
+   IF fullcircle
+      THEN move to (int (cx + rad * cosd (ang)+0.5), 
+                    int (cy + rad * -sind (ang)+0.5));
+           ang INCR 1.0
+   FI;
+   WHILE ang <= max REP 
+     ax1 := cx + rad * cosd (ang);
+     ay1 := cy + rad * -sind (ang); 
+     draw arc;
+     ang INCR 1.0 
+   PER; 
+   IF  NOT fullcircle
+      THEN  ax0 := cx;
+            ay0 := cy;
+            draw arc;
+            draw to (xp,yp)
+      ELSE  move to (xp,yp)
+   FI. 
+
+   draw arc: 
+      IF clipped line (ax0,ay0,ax1,ay1) 
+         THEN draw to (int (ax1+0.5), int (ay1+0.5)) 
+      FI; 
+      ax0 := ax1; 
+      ay0 := ay1. 
+ 
+   endwinkel: 
+      IF (to MOD 360) = 0 
+         THEN 360.0 
+         ELSE real (to MOD 360) 
+      FI 
+END PROC std circle; 
+ 
+PROC std box (INT CONST x0, y0, x1, y1, pattern): 
+      REAL VAR xx0 :: real (x0), 
+               yy0 :: real (y0), 
+               xx1 :: real (x0), 
+               yy1 :: real (y1); 
+      IF clipped line (xx0,yy0,xx1,yy1)
+         THEN moveto (int (xx0), int (yy0)); 
+              drawto (int (xx1), int (yy1)) 
+      FI; 
+      xx0 := real (x0); 
+      yy0 := real (y1); 
+      xx1 := real (x1); 
+      yy1 := real (y1); 
+      IF clipped line (xx0,yy0,xx1,yy1) 
+         THEN moveto (int (xx0), int (yy0)); 
+              drawto (int (xx1), int (yy1)) 
+      FI; 
+      xx0 := real (x1); 
+      yy0 := real (y1); 
+      xx1 := real (x1); 
+      yy1 := real (y0); 
+      IF clipped line (xx0,yy0,xx1,yy1) 
+         THEN moveto (int (xx0), int (yy0)); 
+              drawto (int (xx1), int (yy1)) 
+      FI; 
+      xx0 := real (x1); 
+      yy0 := real (y0); 
+      xx1 := real (x0); 
+      yy1 := real (y0); 
+      IF clipped line (xx0,yy0,xx1,yy1) 
+         THEN moveto (int (xx0), int (yy0)); 
+              drawto (int (xx1), int (yy1)) 
+      FI
+END PROC std box;