Bug 560: Fix 1-pixel gaps between tiles near hidden areas.

Resolves #560. Thanks to Matt McCutchen for this patch.

git-svn-id: http://supertux.lethargik.org/svn/supertux/trunk/supertux@6292 837edb03-e0f3-0310-88ca-d4d4e8b29345

diff --git a/src/object/tilemap.cpp b/src/object/tilemap.cpp
index d916e05..4a144e6 100644 (file)
--- a/src/object/tilemap.cpp
+++ b/src/object/tilemap.cpp
@@ -200,12 +200,14 @@ TileMap::draw(DrawingContext& context)
   if(drawing_effect != 0) context.set_drawing_effect(drawing_effect);
   if(current_alpha != 1.0) context.set_alpha(current_alpha);
 
-  if(!solid) {
-    float trans_x = roundf(context.get_translation().x);
-    float trans_y = roundf(context.get_translation().y);
-    context.set_translation(Vector(int(trans_x * speed_x),
-                                   int(trans_y * speed_y)));
-  }
+  /* Force the translation to be an integer so that the tiles appear sharper.
+   * For consistency (i.e., to avoid 1-pixel gaps), this needs to be done even
+   * for solid tilemaps that are guaranteed to have speed 1.
+   * FIXME Force integer translation for all graphics, not just tilemaps. */
+  float trans_x = roundf(context.get_translation().x);
+  float trans_y = roundf(context.get_translation().y);
+  context.set_translation(Vector(int(trans_x * speed_x),
+                                 int(trans_y * speed_y)));
 
   int tsx = int((context.get_translation().x - x_offset) / 32); // tilestartindex x
   int tsy = int((context.get_translation().y - y_offset) / 32); // tilestartindex y