improved editor (deletion of entities and better loading dialog)

asteroids/Controller.cc

@@ -35,6 +35,9 @@ bool Controller::OnReceiveEvent (const Engine::EventBasePtr &event) {
 void Controller::ResetPlayerEntity () {
 	Engine::HaltSoundLoop(Engine::GetResourceFullPath("/data/sounds/thrust.wav"));
 
+	// We definitely have to reset the player entity id
+	GetModel()->SetPlayerEntityId(Engine::NullEntityId);
+
 	Engine::EntityBase *player_entity = GetModel()->GetEntity(GetModel()->GetPlayerEntityId());
 
 	// if we were unable to get the player then there is no need to invalidate
@@ -46,7 +49,6 @@ void Controller::ResetPlayerEntity () {
 	for (i = 0; i < EntityControllerMaxKeyStates; i++)
 		player_entity->UnsetControllerKeyState(i);
 
-	GetModel()->SetPlayerEntityId(Engine::NullEntityId);
 }
 
 void Controller::ResetLevel() {

asteroids/Model.cc

@@ -250,7 +250,7 @@ int Model::DoLoadLevel (const char* filename) {
 	std::fstream level_file (filename, std::ios::in);
 	
 	if (!level_file) {
-		Engine::LogError ("Unable to open file %s for writing!", filename);
+		Engine::LogError ("Unable to open file %s for reading!", filename);
 		exit (-1);
 	}
 

asteroids/View.cc

@@ -105,8 +105,10 @@ bool View::OnReceiveEvent (const Engine::EventBasePtr &event) {
 
 			break;
 		case EventLevelComplete:
+			if (GetModel()->GetGameState() == GameStateRunning) {
 				PushViewState(ViewStateLevelComplete);
 				GetController()->ResetPlayerEntity();
+			}
 			break;
 
 		case EventGameOver:
@@ -489,6 +491,7 @@ void View::DrawUiMainMenu() {
 
 	if (Engine::GUI::Button (6, "E", screen_right - 48, 20, 32, button_height)) {
 		PushViewState(ViewStateEditor);
+		GetController()->ResetLevel();
 	}
 
 	if (Engine::GUI::Button (4, "Quit", screen_right * 0.5 - 100, 380, button_width, button_height)) {
@@ -768,14 +771,6 @@ void View::DrawUiEditor() {
 //	DrawPageTitle ("Editor");
 	SelectFont ("console.ttf size=23");
 
-	// Special case: if we get here and are currently in the editor state
-	// EditorStateTest, then we returned from our test. In this case we have to
-	// reset the editor state
-	if (mEditorState == EditorStateTest) {
-//		mEditorState = EditorStateUnknown;
-//		Engine::LogMessage ("Returned from testing");
-	}
-
 	// The close button
 	if (Engine::GUI::Button (1, "X", screen_right - 48, 20, 32, button_height) 
 			|| Engine::GUI::CheckKeyPress(SDLK_ESCAPE)) {
@@ -790,33 +785,42 @@ void View::DrawUiEditor() {
 	}
 
 	if (mEditorState != EditorStateTest) {
-		if (Engine::GUI::Button (2, "+", 30, 20, 32, button_height)) {
+		if (Engine::GUI::Button (2, "Add", 30, 20, 50, button_height)) {
 			mEditorState = EditorStateAddEntity;
 		}
 
-		if (Engine::GUI::Button (3, "M", 70, 20, 32, button_height)) {
+		if (Engine::GUI::Button (3, "Del", 85, 20, 50, button_height)) {
+			mEditorState = EditorStateDelEntity;
+		}
+
+		if (Engine::GUI::Button (4, "Move", 140, 20, 65, button_height)) {
 			mEditorState = EditorStateMoveEntity;
 		}
 
-		if (Engine::GUI::Button (4, "V", 110, 20, 32, button_height)) {
+		if (Engine::GUI::Button (5, "Spd", 210, 20, 50, button_height)) {
 			mEditorState = EditorStateEntityVelocity;
 		}
 
-		if (Engine::GUI::Button (5, "S", 150, 20, 32, button_height)) {
+		if (Engine::GUI::Button (6, "Save", 265, 20, 65, button_height)) {
 			mEditorState = EditorStateSave;
 		}
 
-		if (Engine::GUI::Button (6, "L", 190, 20, 32, button_height)) {
+		if (Engine::GUI::Button (7, "Load", 335, 20, 65, button_height)) {
 			mEditorState = EditorStateLoad;
 		}
 
-		if (Engine::GUI::Button (7, "T", 230, 20, 32, button_height)) {
+		// we only show the Test button when there is actually something to play
+		// (i.e. a player entity and at least one asteroid)
+		if (GetModel()->GetPlayerEntityId() != 0 
+				&& GetModel()->mAsteroids.size() > 0) {
+			if (Engine::GUI::Button (8, "Test", 405, 20, 64, button_height)) {
 				mEditorState = EditorStateTest;
 
 				GetModel()->DoSaveLevel("level_edit_temp.txt");
 				GetModel()->SetGameState(GameStateRunning);
 			}
 		}
+	}
 
 	std::ostringstream mouse_pos_str;
 	vector3d mouse_world_pos;
@@ -834,21 +838,32 @@ void View::DrawUiEditor() {
 			// an asteroid
 
 			Engine::EntityBase* entity = NULL;
-			GameEntityType entity_type = GameEntityTypeShip;
+			if (GetModel()->GetPlayerEntityId() != Engine::NullEntityId) {
-			if (GetModel()->GetPlayerEntityId() != 0) {
 				entity = Engine::CreateEntity(GameEntityTypeAsteroid);
 				entity->mPhysicState->SetVelocity (vector3d (0., 0., -1.));
 			} else {
 				entity = Engine::CreateEntity(GameEntityTypeShip);
 				GetModel()->SetPlayerEntityId(entity->mId);
-
 				entity->mPhysicState->SetOrientation (vector3d (0., 90., 0.));
 			}
 
 			// Now we want to insert an Asteroid at the given position
 			entity->mPhysicState->SetPosition (vector3d (mouse_world_pos[0], 0., mouse_world_pos[2]));
+		}
+	}
 
-			mEditorState = EditorStateUnknown;
+	if (mEditorState == EditorStateDelEntity) {
+		SelectFont ("console.ttf size=12");
+		Engine::GUI::Label (9999, "Deleting", 128, 16);
+
+		if (controller->GetButtonState(MouseButtonLeft)) {
+			// Check if there is an entity near the given position
+			Engine::EntityBase* entity = Engine::GetEntityAt (mouse_world_pos);
+
+			if (entity && entity->mType == GameEntityTypeAsteroid) {
+				Engine::LogMessage ("Killing entity with id %u", entity->mId);
+				GetModel()->UnregisterEntity (entity->mId);
+			}
 		}
 	}
 
@@ -941,11 +956,13 @@ void View::DrawUiEditor() {
 		if (Engine::GUI::LineEdit(52, 145, 210, level_name, 32))
 			GetModel()->SetLevelName(level_name);
 
+		if (Engine::FileExists (level_name + std::string(".txt"))) {
 			if (Engine::GUI::Button (54, "Load", 145, 300, button_width, button_height)) {
 				GetModel()->DoLoadLevel((level_name + std::string(".txt")).c_str());
 				Engine::LogMessage ("Load");
 				mEditorState = EditorStateUnknown;
 			}
+		}
 
 		if (Engine::GUI::Button (55, "Cancel", screen_right - 140 - 5 - button_width, 300, button_width, button_height))
 			mEditorState = EditorStateUnknown;

asteroids/View.h

@@ -136,6 +136,7 @@ class View : public Engine::ViewBase {
 		enum EditorState {
 			EditorStateUnknown = 0,
 			EditorStateAddEntity,
+			EditorStateDelEntity,
 			EditorStateMoveEntity,
 			EditorStateSave,
 			EditorStateEntityVelocity,

engine/Engine.cc

@@ -19,6 +19,7 @@
 #include <cstdarg>
 #include <cstdlib>
 #include <assert.h>
+#include <boost/filesystem.hpp>
 
 int vasprintf (char **result, const char *format, va_list *string) {
 	return 0;
@@ -381,5 +382,17 @@ std::string GetUserDirFullPath (const std::string &path) {
 	return EngineInstance->GetUserDirFullPath(path);
 }
 
+bool FileExists (const std::string &path) {
+	boost::filesystem::path file_path (path);
+
+	if (!boost::filesystem::exists(file_path))
+		return false;
+
+	if (boost::filesystem::is_directory(file_path))
+		return false;
+
+	return true;
+}
+
 }
 

engine/Engine.h

@@ -186,6 +186,10 @@ std::string GetResourceFullPath (const std::string &resource);
 /** \brief Returns the path to a file by prepending the user data path to it
  */
 std::string GetUserDirFullPath (const std::string &path);
+
+/** \brief Checks whether a given file exists */
+bool FileExists (const std::string &path);
+
 }
 
 /* Include the globally visible declarations of the other modules */

engine/ModelBase.cc

@@ -22,6 +22,7 @@ int ModelBase::OnInit (int argc, char* argv[]) {
 	mKilledEntities.clear ();
 	mEntityIdCounter = 0;
 	mDeltaSec = 0.;
+	mPlayerEntityId = NullEntityId;
 
 	return 0;
 }
@@ -192,7 +193,6 @@ EntityBase* ModelBase::GetEntityAt (const vector3d &pos) {
 	return NULL;
 }
 
-
 unsigned int ModelBase::CreateEntityId () {
 	if (mEntityIdCounter == NullEntityId - 1)
 		LogError ("Could not create valid entity id, reached maximum value of %u", mEntityIdCounter);