X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fobject%2Ftilemap.cpp;h=576cf48674c48b1ce63c52e0876ea142031c1b3f;hb=fea3446f05e1e7673607b835c269d3e8d1929ab3;hp=c923d5deaf03df8d04cfffb57bd78c94ad692189;hpb=d230ce6c64a83daa0b69af8f5f097985cc65d1b3;p=supertux.git

diff --git a/src/object/tilemap.cpp b/src/object/tilemap.cpp
index c923d5dea..576cf4867 100644
--- a/src/object/tilemap.cpp
+++ b/src/object/tilemap.cpp
@@ -23,7 +23,7 @@
 #include <algorithm>
 #include <iostream>
 #include <stdexcept>
-#include <cmath>
+#include <math.h>
 
 #include "tilemap.hpp"
 #include "video/drawing_context.hpp"
@@ -79,12 +79,16 @@ TileMap::TileMap(const lisp::Lisp& reader, TileManager* new_tile_manager)
     set_x_offset(v.x);
     set_y_offset(v.y);
   }
-  
+
   std::string draw_target_s = "normal";
   reader.get("draw-target", draw_target_s);
   if (draw_target_s == "normal") draw_target = DrawingContext::NORMAL;
   if (draw_target_s == "lightmap") draw_target = DrawingContext::LIGHTMAP;
 
+  if (reader.get("alpha", alpha)) {
+    current_alpha = alpha;
+  }
+
   reader.get("width", width);
   reader.get("height", height);
   if(width < 0 || height < 0)
@@ -148,7 +152,8 @@ TileMap::update(float elapsed_time)
       if (amt > 0) current_alpha = std::min(current_alpha + amt, alpha);
       if (amt < 0) current_alpha = std::max(current_alpha + amt, alpha);
     }
-    if (current_alpha < 0.25) set_solid(false);
+    if ((alpha < 0.25) && (current_alpha < 0.25)) set_solid(false);
+    if ((alpha > 0.75) && (current_alpha > 0.75)) set_solid(true);
   }
 
   // if we have a path to follow, follow it
@@ -162,6 +167,9 @@ TileMap::update(float elapsed_time)
 void
 TileMap::draw(DrawingContext& context)
 {
+  // skip draw if current opacity is set to 0.0
+  if (current_alpha == 0.0) return;
+
   context.push_transform();
   context.push_target();
   context.set_target(draw_target);
@@ -222,7 +230,6 @@ void
 TileMap::expose(HSQUIRRELVM vm, SQInteger table_idx)
 {
   if (name.empty()) return;
-  if (!walker.get()) return;
   Scripting::TileMap* interface = new Scripting::TileMap(this);
   expose_object(vm, table_idx, interface, name, true);
 }
@@ -231,7 +238,6 @@ void
 TileMap::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
 {
   if (name.empty()) return;
-  if (!walker.get()) return;
   Scripting::unexpose_object(vm, table_idx, name);
 }
 
@@ -288,8 +294,8 @@ TileMap::resize(int new_width, int new_height, int fill_id)
   width = new_width;
 }
 
-void 
-TileMap::set_solid(bool solid) 
+void
+TileMap::set_solid(bool solid)
 {
   this->solid = solid;
 }
@@ -333,11 +339,28 @@ TileMap::change_all(uint32_t oldtile, uint32_t newtile)
     }
 }
 
-void 
+void
 TileMap::fade(float alpha, float seconds)
 {
   this->alpha = alpha;
   this->remaining_fade_time = seconds;
 }
 
+
+void 
+TileMap::set_alpha(float alpha)
+{
+  this->alpha = alpha;
+  this->current_alpha = alpha;
+  this->remaining_fade_time = 0;
+  if (current_alpha < 0.25) set_solid(false);
+  if (current_alpha > 0.75) set_solid(true);
+}
+
+float 
+TileMap::get_alpha()
+{
+  return this->current_alpha;
+}
+
 IMPLEMENT_FACTORY(TileMap, "tilemap");