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Mail Archives: geda-user/2014/01/14/15:20:10

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Message-ID: <52D59BDA.2040008@zoot.drehmel.com>
Date: Tue, 14 Jan 2014 21:19:38 +0100
From: Robert Drehmel <robert AT zoot DOT drehmel DOT com>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] New router pictures
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Reply-To: geda-user AT delorie DOT com

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On 01/14/2014 08:42 AM, Gabriel Paubert wrote:
> It's certainly not related to the GL drawing, I also see it with the
> lesstif interface. I believe that this is a polygon dicer bug, and that
> the nm conversion has nothing to do with it.
>
> I have attached two files which show the bug. On the first one, the
> bug disappears temporarily if you type th delete key (to remove the
> selected line) and then "u" to undo the changes. But it reappears
> after saving and reloading the file. On a board I'm designing, I got
> quite a few instances of the bug.
>
> The second file is the simplest test case I could come up with: a
> single 0603 resistor and a single line segment. It can't get much
> simpler than that. Just select the line and copy it from the first
> pad to the second and the bug repeats. It seems to be very reproducible.
>
> I've been trying to enable the polygon debug code, but I don't really
> understand the output.

The attached patch fixes the provided test cases for me.  It merges
the pad clearance polygons with the accumulated POLYAREA, instead of
subtracting them directly.  It's quite possible that the patch is masking
the bug by changing the order in which polygons are subtracted, though.

Best regards,
Robert


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diff --git a/src/polygon.c b/src/polygon.c
index 5f17fd0..8204384 100644
--- a/src/polygon.c
+++ b/src/polygon.c
@@ -107,6 +107,7 @@ dicer output is used for HIDs which cannot render things with holes
 
 #define UNSUBTRACT_BLOAT 10
 #define SUBTRACT_PIN_VIA_BATCH_SIZE 100
+#define SUBTRACT_PAD_BATCH_SIZE 100
 #define SUBTRACT_LINE_BATCH_SIZE 20
 
 static double rotate_circle_seg[4];
@@ -845,6 +846,15 @@ SubtractText (TextType * text, PolygonType * p)
   return Subtract (np, p, true);
 }
 
+static POLYAREA *
+PadPoly (PadType * pad)
+{
+  if (TEST_FLAG (SQUAREFLAG, pad))
+    return SquarePadPoly (pad, pad->Thickness + pad->Clearance);
+  else
+    return LinePoly ((LineType *) pad, pad->Thickness + pad->Clearance);
+}
+
 static int
 SubtractPad (PadType * pad, PolygonType * p)
 {
@@ -852,18 +862,8 @@ SubtractPad (PadType * pad, PolygonType * p)
 
   if (pad->Clearance == 0)
     return 0;
-  if (TEST_FLAG (SQUAREFLAG, pad))
-    {
-      if (!
-          (np = SquarePadPoly (pad, pad->Thickness + pad->Clearance)))
-        return -1;
-    }
-  else
-    {
-      if (!
-          (np = LinePoly ((LineType *) pad, pad->Thickness + pad->Clearance)))
-        return -1;
-    }
+  if ((np = PadPoly (pad)) == NULL)
+    return -1;
   return Subtract (np, p, true);
 }
 
@@ -922,7 +922,6 @@ pin_sub_callback (const BoxType * b, void *cl)
 
   poly_Boolean_free (info->accumulate, np, &merged, PBO_UNITE);
   info->accumulate = merged;
-
   info->batch_size ++;
 
   if (info->batch_size == SUBTRACT_PIN_VIA_BATCH_SIZE)
@@ -954,21 +953,28 @@ pad_sub_callback (const BoxType * b, void *cl)
 {
   PadType *pad = (PadType *) b;
   struct cpInfo *info = (struct cpInfo *) cl;
-  PolygonType *polygon;
+  POLYAREA *np;
+  POLYAREA *merged;
 
   /* don't subtract the object that was put back! */
   if (b == info->other)
     return 0;
   if (pad->Clearance == 0)
     return 0;
-  polygon = info->polygon;
-  if (XOR (TEST_FLAG (ONSOLDERFLAG, pad), !info->solder))
-    {
-      if (SubtractPad (pad, polygon) < 0)
-        longjmp (info->env, 1);
-      return 1;
-    }
-  return 0;
+  if (!XOR (TEST_FLAG (ONSOLDERFLAG, pad), !info->solder))
+    return 0;
+
+  if ((np = PadPoly (pad)) == NULL)
+    longjmp (info->env, 1);
+
+  poly_Boolean_free (info->accumulate, np, &merged, PBO_UNITE);
+  info->accumulate = merged;
+  info->batch_size++;
+
+  if (info->batch_size == SUBTRACT_PAD_BATCH_SIZE)
+    subtract_accumulated (info, info->polygon);
+
+  return 1;
 }
 
 static int

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