Patch by mathnerd314 <man.is.allan@gmail.com> resolves issue 0000302: Mr. Ice Block...

[supertux.git] / src / object / platform.cpp

diff --git a/src/object/platform.cpp b/src/object/platform.cpp
index 6d04777..c6a2da6 100644 (file)
--- a/src/object/platform.cpp
+++ b/src/object/platform.cpp
@@ -33,13 +33,17 @@
 #include "object_factory.hpp"
 #include "scripting/platform.hpp"
 #include "scripting/squirrel_util.hpp"
+#include "sector.hpp"
 
 Platform::Platform(const lisp::Lisp& reader)
-       : MovingSprite(reader, Vector(0,0), LAYER_OBJECTS, COLGROUP_STATIC), name(""), speed(Vector(0,0))
+       : MovingSprite(reader, Vector(0,0), LAYER_OBJECTS, COLGROUP_STATIC), 
+       speed(Vector(0,0)), 
+       automatic(false), player_contact(false), last_player_contact(false)
 {
   bool running = true;
   reader.get("name", name);
   reader.get("running", running);
+  if ((name == "") && (!running)) automatic=true;
   const lisp::Lisp* pathLisp = reader.get_lisp("path");
   if(pathLisp == NULL)
     throw std::runtime_error("No path specified for platform");
@@ -47,27 +51,65 @@ Platform::Platform(const lisp::Lisp& reader)
   path->read(*pathLisp);
   walker.reset(new PathWalker(path.get(), running));
   bbox.set_pos(path->get_base());
-
-  flags |= FLAG_SOLID;
 }
 
 Platform::Platform(const Platform& other)
-       : MovingSprite(other), ScriptInterface(other), name(other.name), speed(other.speed)
+       : MovingSprite(other), ScriptInterface(other), 
+       speed(other.speed), 
+       automatic(other.automatic), player_contact(false), last_player_contact(false)
 {
+  name = other.name;
   path.reset(new Path(*other.path));
   walker.reset(new PathWalker(*other.walker));
   walker->path = &*path;
 }
 
 HitResponse
-Platform::collision(GameObject& , const CollisionHit& )
+Platform::collision(GameObject& other, const CollisionHit& )
 {
+  if (dynamic_cast<Player*>(&other)) player_contact = true;
   return FORCE_MOVE;
 }
 
 void
 Platform::update(float elapsed_time)
 {
+  // check if Platform should automatically pick a destination
+  if (automatic) {
+
+    if (!player_contact && !walker->is_moving()) {
+      // Player doesn't touch platform and Platform is not moving
+
+      // Travel to node nearest to nearest player
+      // FIXME: does not really use nearest player
+      Player* player = 0;      
+      std::vector<Player*> players = Sector::current()->get_players();
+      for (std::vector<Player*>::iterator playerIter = players.begin(); playerIter != players.end(); ++playerIter) {
+       player = *playerIter;
+      }
+      if (player) {
+       int nearest_node_id = path->get_nearest_node_no(player->get_bbox().p2);
+       if (nearest_node_id != -1) {
+         goto_node(nearest_node_id);
+       }
+      }
+    } 
+
+    if (player_contact && !last_player_contact && !walker->is_moving()) {
+      // Player touched platform, didn't touch last frame and Platform is not moving
+
+      // Travel to node farthest from current position
+      int farthest_node_id = path->get_farthest_node_no(get_pos());
+      if (farthest_node_id != -1) {
+       goto_node(farthest_node_id);
+      } 
+    }
+
+    // Clear player_contact flag set by collision() method
+    last_player_contact = player_contact;
+    player_contact = false;
+  }
+
   movement = walker->advance(elapsed_time) - get_pos();
   speed = movement / elapsed_time;
 }
@@ -93,7 +135,7 @@ Platform::stop_moving()
 void
 Platform::expose(HSQUIRRELVM vm, SQInteger table_idx)
 {
-  if (name == "") return;
+  if (name.empty()) return;
   Scripting::Platform* interface = new Scripting::Platform(this);
   expose_object(vm, table_idx, interface, name, true);
 }
@@ -101,7 +143,7 @@ Platform::expose(HSQUIRRELVM vm, SQInteger table_idx)
 void
 Platform::unexpose(HSQUIRRELVM vm, SQInteger table_idx)
 {
-  if (name == "") return;
+  if (name.empty()) return;
   Scripting::unexpose_object(vm, table_idx, name);
 }