From dfae3f0ea4e7dc63be2617b19af88b4010f68928 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Fri, 15 Feb 2002 08:28:48 +0000
Subject: Correction des bugs de GetCirclePoints lorsque l'one demande un arc.
 Passage des deltas de PointPolarToCartesian en flottant.

---
 generic/Geo.c | 41 ++++++++++++++++++++++++-----------------
 1 file changed, 24 insertions(+), 17 deletions(-)

(limited to 'generic/Geo.c')

diff --git a/generic/Geo.c b/generic/Geo.c
index 91c092c..8e2105e 100644
--- a/generic/Geo.c
+++ b/generic/Geo.c
@@ -1194,17 +1194,17 @@ void
 PointPolarToCartesian(ZnReal	heading,
 		      int	rho,
 		      int	theta,
-		      int	*delta_x,
-		      int	*delta_y)
+		      ZnDim	*delta_x,
+		      ZnDim	*delta_y)
 {
-  double	to_angle;
+  ZnReal	to_angle;
 
   /* Compute angle in trigonometric system */
   to_angle = DegreesToRadian(theta) + heading - M_PI_2;
   /*  to_angle = heading - DegreesToRadian(theta);*/
   /* Compute cartesian coordinates */
-  *delta_x = (int) (rho * cos(to_angle));
-  *delta_y = (int) (rho * sin(to_angle));
+  *delta_x = rho * cos(to_angle);
+  *delta_y = rho * sin(to_angle);
 }
 
 /*
@@ -2244,11 +2244,9 @@ GetCirclePoints(int	type,
     /*
      * normalize start_angle and end_angle.
      */
-    start_angle = fmod(start_angle, 2.0*M_PI);
     if (start_angle < 0.0) {
       start_angle += 2.0*M_PI;
     }
-    end_angle = fmod(end_angle, 2.0*M_PI);
     if (end_angle < 0.0) {
       end_angle += 2.0*M_PI;
     }
@@ -2256,8 +2254,11 @@ GetCirclePoints(int	type,
       if (start_angle == end_angle) {
 	type = 3;
       }
-      end_angle += 2.0*M_PI;
+      iangle = start_angle;
+      start_angle = end_angle;
+      end_angle = iangle;
     }
+    start_angle = fmod(start_angle, 2.0*M_PI);
   }
   
   /*
@@ -2276,21 +2277,27 @@ GetCirclePoints(int	type,
       iangle = 2*M_PI / (num_p-1);
       start_p.x = cos(start_angle);
       start_p.y = sin(start_angle);
+      ZnListAdd(point_list, &start_p, ZnListTail);
       i = start_angle / iangle;
       if ((i * iangle) < start_angle) {
 	i++;
       }
-      p = &p_from[i];
-      while (start_angle < end_angle) {
-	ZnListAdd(point_list, &p[i], ZnListTail);
-	start_angle += iangle;
-	i++;
-	if (i == num_p-1) {
-	  i = 0;
+      while (1) {
+	if (start_angle + iangle < end_angle) {
+	  if (i == num_p-1) {
+	    i = 0;
+	  }
+	  ZnListAdd(point_list, &p_from[i], ZnListTail);
+	  start_angle += iangle;
+	  i++;
+	}
+	else {
+	  wp.x = cos(end_angle);
+	  wp.y = sin(end_angle);
+	  ZnListAdd(point_list, &wp, ZnListTail);
+	  break;
 	}
       }
-      wp.x = cos(end_angle);
-      wp.y = sin(end_angle);
       if (type == 1) {
 	ZnListAdd(point_list, &start_p, ZnListTail);
       }
-- 
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