[gimp/soc-2011-warp: 50/56] app: change interpolation for warp tool

[Michael Murà <mmure src gnome org>]

commit 6e1ea21c529cb9702e3cb2488a588cae0e2d4d1c
Author: Alexia Death <alexiadeath gmail com>
Date:   Fri Jul 8 09:07:41 2011 +0300

    app: change interpolation for warp tool

 app/gegl/gimpoperationwarp.c |   35 +++++++++++++++++++++++++----------
 1 files changed, 25 insertions(+), 10 deletions(-)
---
diff --git a/app/gegl/gimpoperationwarp.c b/app/gegl/gimpoperationwarp.c
index 84db9fe..4ccdb83 100644
--- a/app/gegl/gimpoperationwarp.c
+++ b/app/gegl/gimpoperationwarp.c
@@ -255,7 +255,10 @@ gimp_operation_warp_process (GeglOperation       *operation,
                              const GeglRectangle *roi)
 {
   GimpOperationWarp   *ow    = GIMP_OPERATION_WARP (operation);
-  gdouble              distance;
+  gdouble              dist;
+  gdouble              stamps;
+  gdouble              spacing = MAX (ow->size * 0.01, 0.5); /*1% spacing for starters*/
+
   Point                prev, next, lerp;
   gulong               i;
   GeglPathList        *event;
@@ -270,19 +273,31 @@ gimp_operation_warp_process (GeglOperation       *operation,
 
   while (event->next)
     {
+
       event = event->next;
       next = *(event->d.point);
+      dist = point_dist (&next, &prev);
+      stamps = dist / spacing;
 
       /* we are doing a sort of interpolation 3d throught x,y and time */
-      distance = sqrt (POW2(point_dist (&next, &prev)) + POW2(STROKE_RATE));
-
-      for (i = 0; i <= distance; i++)
-        {
-          point_lerp (&lerp, &prev, &next, i / distance);
-          gimp_operation_warp_stamp (ow, lerp.x, lerp.y);
-        }
-
-      prev = next;
+      /*distance = sqrt (POW2() + POW2(STROKE_RATE)); Weird stuff... */
+
+      if (stamps < 1)
+       {
+        gimp_operation_warp_stamp (ow, next.x, next.y);
+        prev = next;
+       }
+      else
+       {
+        for (i = 0; i < stamps; i++)
+          {
+            point_lerp (&lerp, &prev, &next, (i * spacing) / dist);
+            gimp_operation_warp_stamp (ow, lerp.x, lerp.y);
+          }
+         prev = lerp;
+       }
+
+      
     }
 
   /* Affect the output buffer */