Chapters 1-5, 8

Created by: chalonverse

Chapter01/Chapter01-mac.xcodeproj/project.xcworkspace/contents.xcworkspacedata

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Chapter01/Chapter01-mac.xcodeproj/project.xcworkspace/contents.xcworkspacedata

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Chapter01/Chapter01-windows.sln

+
+Microsoft Visual Studio Solution File, Format Version 12.00
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+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Game", "Game.vcxproj", "{BC508D87-495F-4554-932D-DD68388B63CC}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{BC508D87-495F-4554-932D-DD68388B63CC}.Debug|Win32.ActiveCfg = Debug|Win32
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+		{BC508D87-495F-4554-932D-DD68388B63CC}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Chapter01/Game.cpp

+// ----------------------------------------------------------------
+// From Game Programming in C++ by Sanjay Madhav
+// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
+// 
+// Released under the BSD License
+// See LICENSE in root directory for full details.
+// ----------------------------------------------------------------
+
+#include "Game.h"
+
+const int thickness = 15;
+const float paddleH = 100.0f;
+
+Game::Game()
+:mWindow(nullptr)
+,mRenderer(nullptr)
+,mTicksCount(0)
+,mIsRunning(true)
+,mPaddleDir(0)
+{
+	
+}
+
+bool Game::Initialize()
+{
+	// Initialize SDL
+	int sdlResult = SDL_Init(SDL_INIT_VIDEO);
+	if (sdlResult != 0)
+	{
+		SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
+		return false;
+	}
+	
+	// Create an SDL Window
+	mWindow = SDL_CreateWindow(
+		"Game Programming in C++ (Chapter 1)", // Window title
+		100,	// Top left x-coordinate of window
+		100,	// Top left y-coordinate of window
+		1024,	// Width of window
+		768,	// Height of window
+		0		// Flags (0 for no flags set)
+	);
+
+	if (!mWindow)
+	{
+		SDL_Log("Failed to create window: %s", SDL_GetError());
+		return false;
+	}
+	
+	//// Create SDL renderer
+	mRenderer = SDL_CreateRenderer(
+		mWindow, // Window to create renderer for
+		-1,		 // Usually -1
+		SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC
+	);
+
+	if (!mRenderer)
+	{
+		SDL_Log("Failed to create renderer: %s", SDL_GetError());
+		return false;
+	}
+	//
+	mPaddlePos.x = 10.0f;
+	mPaddlePos.y = 768.0f/2.0f;
+	mBallPos.x = 1024.0f/2.0f;
+	mBallPos.y = 768.0f/2.0f;
+	mBallVel.x = -200.0f;
+	mBallVel.y = 235.0f;
+	return true;
+}
+
+void Game::RunLoop()
+{
+	while (mIsRunning)
+	{
+		ProcessInput();
+		UpdateGame();
+		GenerateOutput();
+	}
+}
+
+void Game::ProcessInput()
+{
+	SDL_Event event;
+	while (SDL_PollEvent(&event))
+	{
+		switch (event.type)
+		{
+			// If we get an SDL_QUIT event, end loop
+			case SDL_QUIT:
+				mIsRunning = false;
+				break;
+		}
+	}
+	
+	// Get state of keyboard
+	const Uint8* state = SDL_GetKeyboardState(NULL);
+	// If escape is pressed, also end loop
+	if (state[SDL_SCANCODE_ESCAPE])
+	{
+		mIsRunning = false;
+	}
+	
+	// Update paddle direction based on W/S keys
+	mPaddleDir = 0;
+	if (state[SDL_SCANCODE_W])
+	{
+		mPaddleDir -= 1;
+	}
+	if (state[SDL_SCANCODE_S])
+	{
+		mPaddleDir += 1;
+	}
+}
+
+void Game::UpdateGame()
+{
+	// Wait until 16ms has elapsed since last frame
+	while (!SDL_TICKS_PASSED(SDL_GetTicks(), mTicksCount + 16))
+		;
+
+	// Delta time is the difference in ticks from last frame
+	// (converted to seconds)
+	float deltaTime = (SDL_GetTicks() - mTicksCount) / 1000.0f;
+	
+	// Clamp maximum delta time value
+	if (deltaTime > 0.05f)
+	{
+		deltaTime = 0.05f;
+	}
+
+	// Update tick counts (for next frame)
+	mTicksCount = SDL_GetTicks();
+	
+	// Update paddle position based on direction
+	if (mPaddleDir != 0)
+	{
+		mPaddlePos.y += mPaddleDir * 300.0f * deltaTime;
+		// Make sure paddle doesn't move off screen!
+		if (mPaddlePos.y < (paddleH/2.0f + thickness))
+		{
+			mPaddlePos.y = paddleH/2.0f + thickness;
+		}
+		else if (mPaddlePos.y > (768.0f - paddleH/2.0f - thickness))
+		{
+			mPaddlePos.y = 768.0f - paddleH/2.0f - thickness;
+		}
+	}
+	
+	// Update ball position based on ball velocity
+	mBallPos.x += mBallVel.x * deltaTime;
+	mBallPos.y += mBallVel.y * deltaTime;
+	
+	// Bounce if needed
+	// Did we intersect with the paddle?
+	float diff = mPaddlePos.y - mBallPos.y;
+	// Take absolute value of difference
+	diff = (diff > 0.0f) ? diff : -diff;
+	if (
+		// Our y-difference is small enough
+		diff <= paddleH / 2.0f &&
+		// We are in the correct x-position
+		mBallPos.x <= 25.0f && mBallPos.x >= 20.0f &&
+		// The ball is moving to the left
+		mBallVel.x < 0.0f)
+	{
+		mBallVel.x *= -1.0f;
+	}
+	// Did the ball go off the screen? (if so, end game)
+	else if (mBallPos.x <= 0.0f)
+	{
+		mIsRunning = false;
+	}
+	// Did the ball collide with the right wall?
+	else if (mBallPos.x >= (1024.0f - thickness) && mBallVel.x > 0.0f)
+	{
+		mBallVel.x *= -1.0f;
+	}
+	
+	// Did the ball collide with the top wall?
+	if (mBallPos.y <= thickness && mBallVel.y < 0.0f)
+	{
+		mBallVel.y *= -1;
+	}
+	// Did the ball collide with the bottom wall?
+	else if (mBallPos.y >= (768 - thickness) &&
+		mBallVel.y > 0.0f)
+	{
+		mBallVel.y *= -1;
+	}
+}
+
+void Game::GenerateOutput()
+{
+	// Set draw color to blue
+	SDL_SetRenderDrawColor(
+		mRenderer,
+		0,		// R
+		0,		// G 
+		255,	// B
+		255		// A
+	);
+	
+	// Clear back buffer
+	SDL_RenderClear(mRenderer);
+
+	// Draw walls
+	SDL_SetRenderDrawColor(mRenderer, 255, 255, 255, 255);
+	
+	// Draw top wall
+	SDL_Rect wall{
+		0,			// Top left x
+		0,			// Top left y
+		1024,		// Width
+		thickness	// Height
+	};
+	SDL_RenderFillRect(mRenderer, &wall);
+	
+	// Draw bottom wall
+	wall.y = 768 - thickness;
+	SDL_RenderFillRect(mRenderer, &wall);
+	
+	// Draw right wall
+	wall.x = 1024 - thickness;
+	wall.y = 0;
+	wall.w = thickness;
+	wall.h = 1024;
+	SDL_RenderFillRect(mRenderer, &wall);
+	
+	// Draw paddle
+	SDL_Rect paddle{
+		static_cast<int>(mPaddlePos.x),
+		static_cast<int>(mPaddlePos.y - paddleH/2),
+		thickness,
+		static_cast<int>(paddleH)
+	};
+	SDL_RenderFillRect(mRenderer, &paddle);
+	
+	// Draw ball
+	SDL_Rect ball{	
+		static_cast<int>(mBallPos.x - thickness/2),
+		static_cast<int>(mBallPos.y - thickness/2),
+		thickness,
+		thickness
+	};
+	SDL_RenderFillRect(mRenderer, &ball);
+	
+	// Swap front buffer and back buffer
+	SDL_RenderPresent(mRenderer);
+}
+
+void Game::Shutdown()
+{
+	SDL_DestroyRenderer(mRenderer);
+	SDL_DestroyWindow(mWindow);
+	SDL_Quit();
+}

Chapter01/Game.h

+// ----------------------------------------------------------------
+// From Game Programming in C++ by Sanjay Madhav
+// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
+// 
+// Released under the BSD License
+// See LICENSE in root directory for full details.
+// ----------------------------------------------------------------
+
+#pragma once
+#include "SDL/SDL.h"
+
+// Vector2 struct just stores x/y coordinates
+// (for now)
+struct Vector2
+{
+	float x;
+	float y;
+};
+
+// Game class
+class Game
+{
+public:
+	Game();
+	// Initialize the game
+	bool Initialize();
+	// Runs the game loop until the game is over
+	void RunLoop();
+	// Shutdown the game
+	void Shutdown();
+private:
+	// Helper functions for the game loop
+	void ProcessInput();
+	void UpdateGame();
+	void GenerateOutput();
+
+	// Window created by SDL
+	SDL_Window* mWindow;
+	// Renderer for 2D drawing
+	SDL_Renderer* mRenderer;
+	// Number of ticks since start of game
+	Uint32 mTicksCount;
+	// Game should continue to run
+	bool mIsRunning;
+	
+	// Pong specific
+	// Direction of paddle
+	int mPaddleDir;
+	// Position of paddle
+	Vector2 mPaddlePos;
+	// Position of ball
+	Vector2 mBallPos;
+	// Velocity of ball
+	Vector2 mBallVel;
+};

Chapter01/Game.vcxproj

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+    <ClCompile Include="Game.cpp" />
+    <ClCompile Include="Main.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Game.h" />
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+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>Game</RootNamespace>
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+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
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+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>..\external\SDL\include;..\external\GLEW\include;..\external\SOIL\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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+    <Link>
+      <SubSystem>Console</SubSystem>
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+      <AdditionalOptions>/NODEFAULTLIB:msvcrt.lib %(AdditionalOptions)</AdditionalOptions>
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+    <PostBuildEvent>
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+    </PostBuildEvent>
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+      <SDLCheck>true</SDLCheck>
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+    <Link>
+      <SubSystem>Console</SubSystem>
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+      <AdditionalLibraryDirectories>..\external\SDL\lib\win\x86;..\external\GLEW\lib\win\x86;..\external\SOIL\lib\win\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
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\ No newline at end of file

Chapter01/Game.vcxproj.filters

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\ No newline at end of file

Chapter01/Main.cpp

+// ----------------------------------------------------------------
+// From Game Programming in C++ by Sanjay Madhav
+// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
+// 
+// Released under the BSD License
+// See LICENSE in root directory for full details.
+// ----------------------------------------------------------------
+
+#include "Game.h"
+
+int main(int argc, char** argv)
+{
+	Game game;
+	bool success = game.Initialize();
+	if (success)
+	{
+		game.RunLoop();
+	}
+	game.Shutdown();
+	return 0;
+}