Allow player movement

src/control/InputHandler.hpp

@@ -0,0 +1,73 @@
+/*
+  Copyright (c) 2014, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include <SDL.h>
+
+#include <cstdint>
+#include <unordered_set>
+
+
+namespace RPGEdit {
+
+namespace Control {
+
+class InputHandler {
+private:
+	std::unordered_set<uint16_t> pressedKeys;
+	std::unordered_set<uint16_t> unhandledKeys;
+
+public:
+	void keyPressed(SDL_Scancode key) {
+		pressedKeys.insert(key);
+		unhandledKeys.insert(key);
+	}
+
+	void keyReleased(SDL_Scancode key) {
+		pressedKeys.erase(key);
+	}
+
+	void keyHandled(SDL_Scancode key) {
+		unhandledKeys.erase(key);
+	}
+
+	void resetHandled() {
+		unhandledKeys.clear();
+	}
+
+	bool isKeyPressed(SDL_Scancode key) {
+		return pressedKeys.count(key);
+	}
+
+	bool isKeyUnhandled(SDL_Scancode key) {
+		return unhandledKeys.count(key);
+	}
+};
+
+}
+
+}

src/control/MapContext.hpp

@@ -27,6 +27,7 @@
 #pragma once
 
 #include "ImageLoader.hpp"
+#include "InputHandler.hpp"
 #include "../model/Map.hpp"
 #include "../view/MapView.hpp"
 
@@ -47,9 +48,31 @@ private:
 	std::vector<SDL_Surface *> tiles;
 	std::map<std::string, SDL_Surface *> entities;
 
+	uint64_t totalTicks = 0;
+
 public:
 	MapContext(ImageLoader *imageLoader0, const std::shared_ptr<const Model::Map> &map0);
 
+	void advance(InputHandler *inputHandler, uint32_t ticks) {
+		uint64_t totalTicksOld = totalTicks;
+		totalTicks += ticks;
+
+		uint64_t advanced = totalTicks/100 - totalTicksOld/100;
+
+		if (inputHandler->isKeyPressed(SDL_SCANCODE_UP)) {
+			map->getPlayerEntity().move(Model::NORTH, advanced);
+		}
+		else if (inputHandler->isKeyPressed(SDL_SCANCODE_RIGHT)) {
+			map->getPlayerEntity().move(Model::EAST, advanced);
+		}
+		else if (inputHandler->isKeyPressed(SDL_SCANCODE_DOWN)) {
+			map->getPlayerEntity().move(Model::SOUTH, advanced);
+		}
+		else if (inputHandler->isKeyPressed(SDL_SCANCODE_LEFT)) {
+			map->getPlayerEntity().move(Model::WEST, advanced);
+		}
+	}
+
 	std::shared_ptr<View::MapView> initView(const std::shared_ptr<View::Window> &window) {
 		return std::make_shared<View::MapView>(window, map, tiles, entities);
 	}

src/model/Direction.hpp

@@ -27,9 +27,17 @@
 #pragma once
 
 
+namespace RPGEdit {
+
+namespace Model {
+
 enum Direction {
 	NORTH,
 	EAST,
 	SOUTH,
 	WEST,
 };
+
+}
+
+}

src/model/Entity.hpp

@@ -63,10 +63,31 @@ public:
 		return dir;
 	}
 
-	void move(float newX, float newY) {
+	void moveTo(float newX, float newY) {
 		x = newX;
 		y = newY;
 	}
+
+	void move(Direction direction, float amount = 1) {
+		dir = direction;
+
+		switch (direction) {
+		case NORTH:
+			y -= amount;
+			break;
+
+		case EAST:
+			x += amount;
+			break;
+
+		case SOUTH:
+			y += amount;
+			break;
+
+		case WEST:
+			x -= amount;
+		}
+	}
 };
 
 }

src/model/Map.cpp

@@ -45,10 +45,10 @@ std::shared_ptr<Map> Map::load(__attribute__((unused)) const std::string &name)
 		}
 	}
 
-	std::shared_ptr<Entity> square(new Entity("square"));
-	square->move(6, 6);
+	map->playerEntity.reset(new Entity("square"));
+	map->playerEntity->moveTo(6, 6);
 
-	map->entities.push_back(square);
+	map->entities.push_back(map->playerEntity);
 
 	return map;
 }

src/model/Map.hpp

@@ -46,6 +46,7 @@ private:
 	size_t width, height;
 	std::unique_ptr<uint32_t[]> tiles;
 
+	std::shared_ptr<Entity> playerEntity;
 	mutable std::deque<std::shared_ptr<Entity>> entities;
 
 
@@ -66,6 +67,10 @@ public:
 		return entities;
 	}
 
+	Entity & getPlayerEntity() const {
+		return *playerEntity;
+	}
+
 	size_t getWidth() const {
 		return width;
 	}

src/rpgedit.cpp

@@ -24,9 +24,9 @@
 */
 
 
+#include "control/InputHandler.hpp"
 #include "control/MapContext.hpp"
 #include "view/MapView.hpp"
-#include "model/Entity.hpp"
 
 #include <unistd.h>
 
@@ -34,6 +34,9 @@
 #include <SDL_main.h>
 
 
+#define MIN_FRAME_DELAY 10
+
+
 extern "C"
 int main(__attribute__((unused)) int argc, __attribute__((unused)) char *argv[]) {
 	using namespace RPGEdit;
@@ -41,6 +44,8 @@ int main(__attribute__((unused)) int argc, __attribute__((unused)) char *argv[])
 	SDL_Init(SDL_INIT_VIDEO);
 
 	{
+		Control::InputHandler inputHandler;
+
 		Control::ImageLoader tileLoader;
 		std::shared_ptr<Model::Map> map = Model::Map::load("test");
 
@@ -50,11 +55,28 @@ int main(__attribute__((unused)) int argc, __attribute__((unused)) char *argv[])
 		std::shared_ptr<View::MapView> mapView = ctx->initView(window);
 
 		bool running = true;
+		uint32_t ticks = SDL_GetTicks();
 
 		while (true) {
 			SDL_Event event;
-			while (SDL_PollEvent(&event)) {
-				if (event.type == SDL_QUIT) {
+			while (running) {
+				int timeout = ticks + MIN_FRAME_DELAY - SDL_GetTicks();
+				if (timeout < 0)
+					timeout = 0;
+
+				if (!SDL_WaitEventTimeout(&event, timeout))
+					break;
+
+				switch (event.type) {
+				case SDL_KEYDOWN:
+					inputHandler.keyPressed(event.key.keysym.scancode);
+					break;
+
+				case SDL_KEYUP:
+					inputHandler.keyReleased(event.key.keysym.scancode);
+					break;
+
+				case SDL_QUIT:
 					running = false;
 					break;
 				}
@@ -63,6 +85,11 @@ int main(__attribute__((unused)) int argc, __attribute__((unused)) char *argv[])
 			if (!running)
 				break;
 
+			uint32_t newTicks = SDL_GetTicks();
+			ctx->advance(&inputHandler, newTicks - ticks);
+
+			ticks = newTicks;
+
 			mapView->render(8, 8);
 		}
 	}

src/view/MapView.cpp

@@ -121,7 +121,7 @@ void MapView::render(float centerX, float centerY) {
 
 	for (const std::shared_ptr<Model::Entity> &entity : map->getEntities()) {
 		std::pair<float, float> pos = entity->getPosition();
-		Direction dir = entity->getDirection();
+		Model::Direction dir = entity->getDirection();
 
 		SDL_Rect src = {
 			.x = 16*dir,