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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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of this license document, but changing it is not allowed.
Preamble
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THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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@ -0,0 +1,34 @@
EXE = LawfulGood
SRC = \
src/main.cpp \
CXX = g++
CXXFLAGS = \
-I./lib/include \
-std=c++17 \
-O2 \
LD = g++
LDFLAGS = \
-lglfw \
-lvulkan \
-ldl \
-lpthread \
$(EXE): $(SRC) shaders
mkdir -p bin
$(CXX) $(CXXFLAGS) $(SRC) $(LDFLAGS) -o bin/$@
shaders: res/shaders/shader.frag res/shaders/shader.vert
mkdir -p bin/shaders
glslc res/shaders/shader.vert -o bin/shaders/vert.spv
glslc res/shaders/shader.frag -o bin/shaders/frag.spv
.PHONY: test clean
test: $(EXE)
./bin/$<
clean:
rm -rf bin/

14
README.md
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@ -12,8 +12,18 @@ Download latest release, or browse releases page. @@@
## Building from source ## Building from source
Dependencies: Dependencies:
- Debian: `vulkan-tools libvulkan-dev vulkan-validationlayers-dev spirv-tools` - Debian:
- Arch: `vulkan-devel` - Vulkan: `vulkan-tools libvulkan-dev vulkan-validationlayers-dev spirv-tools`
- glfw: `libglfw3-dev`
- glm: `libglm-dev`
- Fedora:
- Vulkan: `vulkan-tools vulkan-loader-devel mesa-vulkan-devel vulkan-validation-layers-devel`
- glfw: `glfw-devel`
- glm: `glm-devel`
- Arch:
- Vulkan: `vulkan-devel`
- glfw: `glfw-wayland` or `glfw-x11 for X11 users`
- glm: `glm`
Check for vulkan compatibility Check for vulkan compatibility
([vulkan-tutorial.com](https://vulkan-tutorial.com/resources/vulkan_tutorial_en.pdf)): ([vulkan-tutorial.com](https://vulkan-tutorial.com/resources/vulkan_tutorial_en.pdf)):

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/*
* GLFW_INCLUDE_VULKAN will include its own definitions and
* automatically load the Vulkan header with it.
*
* The stdexcept and iostream headers are included for reporting and
* propagating errors. The cstdlib header provides the EXIT_SUCCESS
* and EXIT_FAILURE macros.
*/
#define GLFW_INCLUDE_VULKAN
#include <GLFW/glfw3.h>
#include <iostream>
#include <stdexcept>
#include <vector>
#include <cstring>
#include <cstdlib>
#include <optional>
#include <set>
const uint32_t WIDTH = 800;
const uint32_t HEIGHT = 600;
/*
* All of the useful standard validation is bundled into a layer
* included in the SDK that is known as VK_LAYER_KHRONOS_validation.
*/
const std::vector<const char*> validationLayers = {
"VK_LAYER_KHRONOS_validation"
};
/*
* The NDEBUG macro is part of the C++ standard and means "not debug".
* Base that value on whether the program is being compiled in debug
* mode or not.
*/
#ifdef NDEBUG
const bool enableValidationLayers = false;
#else
const bool enableValidationLayers = true;
#endif
/*
* Proxy function that handles looks up the address of
* VkDebugUtilsMessengerEXT using vkGetInstanceProcAddr.
*/
VkResult CreateDebugUtilsMessengerEXT(VkInstance instance, const VkDebugUtilsMessengerCreateInfoEXT* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkDebugUtilsMessengerEXT* pDebugMessenger) {
auto func = (PFN_vkCreateDebugUtilsMessengerEXT) vkGetInstanceProcAddr(instance, "vkCreateDebugUtilsMessengerEXT");
if (func != nullptr) {
return func(instance, pCreateInfo, pAllocator, pDebugMessenger);
} else {
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
}
/*
* Proxy function that handles cleaning up the
* VkDebugUtilsMessengerEXT object.
*/
void DestroyDebugUtilsMessengerEXT(VkInstance instance, VkDebugUtilsMessengerEXT debugMessenger, const VkAllocationCallbacks* pAllocator) {
auto func = (PFN_vkDestroyDebugUtilsMessengerEXT) vkGetInstanceProcAddr(instance, "vkDestroyDebugUtilsMessengerEXT");
if (func != nullptr) {
func(instance, debugMessenger, pAllocator);
}
}
/*
* It has been briefly touched upon before that almost every operation in Vulkan,
* anything from drawing to uploading textures, requires commands to be submitted
* to a queue. There are different types of queues that originate from different
* queue families and each family of queues allows only a subset of commands.
* For example, there could be a queue family that only allows processing of compute
* commands or one that only allows memory transfer related commands.
* We need to check which queue families are supported by the device and which
* one of these supports the commands that we want to use. For that purpose we'll
* add a new function findQueueFamilies that looks for all the queue families
* we need.
*/
struct QueueFamilyIndices {
/*
* std::optional is a wrapper that contains no value until you assign something
* to it. At any point you can query if it contains a value or not by calling
* its has_value() member function.
*/
std::optional<uint32_t> graphicsFamily;
std::optional<uint32_t> presentFamily;
bool isComplete() {
return graphicsFamily.has_value() && presentFamily.has_value();
}
};
/*
* The program itself is wrapped into a class where we'll store the
* Vulkan objects as private class members and add functions to
* initiate each of them, which will be called from the initVulkan
* function.
*/
class Application {
public:
void run() {
initWindow();
initVulkan();
mainLoop();
cleanup();
}
private:
GLFWwindow* window; // Member to store a reference to it and initialize the window
VkInstance instance; // Data member to hold the handle to the instance
VkDebugUtilsMessengerEXT debugMessenger;
VkSurfaceKHR surface;
VkPhysicalDevice physicalDevice = VK_NULL_HANDLE;
VkDevice device;
VkQueue graphicsQueue; // Class member to store a handle to the graphics queue
VkQueue presentQueue;
void initWindow() {
glfwInit();
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
window = glfwCreateWindow(
WIDTH,
HEIGHT,
"@@@ Window Name",
nullptr,
nullptr
);
}
void initVulkan() {
createInstance();
setupDebugMessenger();
createSurface();
pickPhysicalDevice();
createLogicalDevice();
}
void mainLoop() {
while (!glfwWindowShouldClose(window)) {
glfwPollEvents();
}
}
/*
* Once the window is closed and mainLoop returns,
* we'll make sure to deallocate the resources.
*/
void cleanup() {
vkDestroyDevice(device, nullptr); // Destroy logical device
if (enableValidationLayers) {
DestroyDebugUtilsMessengerEXT(instance, debugMessenger, nullptr);
}
vkDestroySurfaceKHR(instance, surface, nullptr);
vkDestroyInstance(instance, nullptr);
glfwDestroyWindow(window);
glfwTerminate();
}
void createInstance() {
if (enableValidationLayers && !checkValidationLayerSupport()) {
throw std::runtime_error("validation layers requested, but not available!");
}
/*
* Struct with some information about our application. This data is technically
* optional, but it may provide some useful information to the driver in order
* to optimize our specific application (e.g. because it uses a well-known
* graphics engine with certain special behavior).
*/
VkApplicationInfo gameInfo{};
gameInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
gameInfo.pApplicationName = "@@@ Application Name";
gameInfo.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
gameInfo.pEngineName = "No Engine";
gameInfo.engineVersion = VK_MAKE_VERSION(1, 0, 0);
gameInfo.apiVersion = VK_API_VERSION_1_0;
VkInstanceCreateInfo createInfo{};
createInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
createInfo.pApplicationInfo = &gameInfo;
auto extensions = getRequiredExtensions();
createInfo.enabledExtensionCount = static_cast<uint32_t>(extensions.size());
createInfo.ppEnabledExtensionNames = extensions.data();
/*
* If the check was successful then vkCreateInstance should not ever return
* a VK_ERROR_LAYER_NOT_PRESENT error.
*/
VkDebugUtilsMessengerCreateInfoEXT debugCreateInfo{};
if (enableValidationLayers) {
createInfo.enabledLayerCount = static_cast<uint32_t>(validationLayers.size());
createInfo.ppEnabledLayerNames = validationLayers.data();
populateDebugMessengerCreateInfo(debugCreateInfo);
createInfo.pNext = (VkDebugUtilsMessengerCreateInfoEXT*) &debugCreateInfo;
} else {
createInfo.enabledLayerCount = 0;
createInfo.pNext = nullptr;
}
if (vkCreateInstance(&createInfo, nullptr, &instance) != VK_SUCCESS) {
throw std::runtime_error("failed to create instance!");
}
}
/*
* This struct should be passed to the vkCreateDebugUtilsMessengerEXT
* function to create the VkDebugUtilsMessengerEXT object. Unfortunately,
* because this function is an extension function, it is not automatically
* loaded. We use a proxy function, VkResult.
*/
void populateDebugMessengerCreateInfo(VkDebugUtilsMessengerCreateInfoEXT& createInfo) {
createInfo = {};
createInfo.sType = VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT;
createInfo.messageSeverity = VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT;
createInfo.messageType = VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT;
createInfo.pfnUserCallback = debugCallback;
}
void setupDebugMessenger() {
if (!enableValidationLayers) return;
VkDebugUtilsMessengerCreateInfoEXT createInfo;
populateDebugMessengerCreateInfo(createInfo);
if (CreateDebugUtilsMessengerEXT(instance, &createInfo, nullptr, &debugMessenger) != VK_SUCCESS) {
throw std::runtime_error("failed to set up debug messenger!");
}
}
void createSurface() {
if (glfwCreateWindowSurface(instance, window, nullptr, &surface) != VK_SUCCESS) {
throw std::runtime_error("failed to create window surface!");
}
}
/*
* Select a physical device
*/
void pickPhysicalDevice() {
uint32_t deviceCount = 0;
vkEnumeratePhysicalDevices(instance, &deviceCount, nullptr);
if (deviceCount == 0) {
throw std::runtime_error("failed to find GPUs with Vulkan support!");
}
std::vector<VkPhysicalDevice> devices(deviceCount);
vkEnumeratePhysicalDevices(instance, &deviceCount, devices.data());
for (const auto& device : devices) {
if (isDeviceSuitable(device)) {
physicalDevice = device;
break;
}
}
/*
* Check if any of the physical devices meet the requirements
*/
if (physicalDevice == VK_NULL_HANDLE) {
throw std::runtime_error("failed to find a suitable GPU!");
}
}
/*
* Check if any of the physical devices meet the requirements
*/
void createLogicalDevice() {
QueueFamilyIndices indices = findQueueFamilies(physicalDevice);
std::vector<VkDeviceQueueCreateInfo> queueCreateInfos;
std::set<uint32_t> uniqueQueueFamilies = {indices.graphicsFamily.value(), indices.presentFamily.value()};
float queuePriority = 1.0f;
for (uint32_t queueFamily : uniqueQueueFamilies) {
VkDeviceQueueCreateInfo queueCreateInfo{};
queueCreateInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
queueCreateInfo.queueFamilyIndex = queueFamily;
queueCreateInfo.queueCount = 1;
queueCreateInfo.pQueuePriorities = &queuePriority;
queueCreateInfos.push_back(queueCreateInfo);
}
VkPhysicalDeviceFeatures deviceFeatures{};
VkDeviceCreateInfo createInfo{};
createInfo.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
createInfo.queueCreateInfoCount = static_cast<uint32_t>(queueCreateInfos.size());
createInfo.pQueueCreateInfos = queueCreateInfos.data();
createInfo.pEnabledFeatures = &deviceFeatures;
createInfo.enabledExtensionCount = 0;
if (enableValidationLayers) {
createInfo.enabledLayerCount = static_cast<uint32_t>(validationLayers.size());
createInfo.ppEnabledLayerNames = validationLayers.data();
} else {
createInfo.enabledLayerCount = 0;
}
if (vkCreateDevice(physicalDevice, &createInfo, nullptr, &device) != VK_SUCCESS) {
throw std::runtime_error("failed to create logical device!");
}
vkGetDeviceQueue(device, indices.graphicsFamily.value(), 0, &graphicsQueue);
vkGetDeviceQueue(device, indices.presentFamily.value(), 0, &presentQueue);
}
bool isDeviceSuitable(VkPhysicalDevice device) {
QueueFamilyIndices indices = findQueueFamilies(device);
return indices.isComplete();
}
QueueFamilyIndices findQueueFamilies(VkPhysicalDevice device) {
QueueFamilyIndices indices;
uint32_t queueFamilyCount = 0;
vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, nullptr);
std::vector<VkQueueFamilyProperties> queueFamilies(queueFamilyCount);
vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, queueFamilies.data());
int i = 0;
for (const auto& queueFamily : queueFamilies) {
if (queueFamily.queueFlags & VK_QUEUE_GRAPHICS_BIT) {
indices.graphicsFamily = i;
}
VkBool32 presentSupport = false;
vkGetPhysicalDeviceSurfaceSupportKHR(device, i, surface, &presentSupport);
if (presentSupport) {
indices.presentFamily = i;
}
if (indices.isComplete()) {
break;
}
i++;
}
return indices;
}
std::vector<const char*> getRequiredExtensions() {
/*
* Vulkan is a platform agnostic API, which means that you need
* an extension to interface with the window system. GLFW has a
* handy built-in function that returns the extension(s) it needs
* to do that.
*/
uint32_t glfwExtensionCount = 0;
const char** glfwExtensions;
glfwExtensions = glfwGetRequiredInstanceExtensions(&glfwExtensionCount);
std::vector<const char*> extensions(glfwExtensions, glfwExtensions + glfwExtensionCount);
if (enableValidationLayers) {
extensions.push_back(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
}
return extensions;
}
/*
* checkValidationLayerSupport checks if all of the requested layers
* are available. First list all of the available layers using the
* vkEnumerateInstanceLayerProperties function.
*/
bool checkValidationLayerSupport() {
uint32_t layerCount;
vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
std::vector<VkLayerProperties> availableLayers(layerCount);
vkEnumerateInstanceLayerProperties(&layerCount, availableLayers.data());
/*
* Check if all of the layers in validationLayers exist in the
* availableLayers list.
*/
for (const char* layerName : validationLayers) {
bool layerFound = false;
for (const auto& layerProperties : availableLayers) {
if (strcmp(layerName, layerProperties.layerName) == 0) {
layerFound = true;
break;
}
}
if (!layerFound) {
return false;
}
}
return true;
}
static VKAPI_ATTR VkBool32 VKAPI_CALL debugCallback(VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity, VkDebugUtilsMessageTypeFlagsEXT messageType, const VkDebugUtilsMessengerCallbackDataEXT* pCallbackData, void* pUserData) {
std::cerr << "validation layer: " << pCallbackData->pMessage << std::endl;
return VK_FALSE;
}
};
/*
* Enter the main loop to start rendering frames. We'll fill in
* the mainLoop function to include a loop that iterates until
* the window is closed.
*/
int main() {
Application game;
try {
game.run();
} catch (const std::exception& e) {
std::cerr << e.what() << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}

13
doc/story/characters.md
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@ -0,0 +1,13 @@
# Main story
## Main characters
### MAINCHARACTER
### ENEMY
### FRIEND
## Secondary characters
### Elites
# Side quests

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doc/story/plot.md
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@ -1,10 +1,10 @@
# Structure # Structure
- [] Exposition - [ ] Exposition
- [] Rising action - [ ] Rising action
- [] Climax - [ ] Climax
- [] Falling action - [ ] Falling action
- [] Resolution - [ ] Resolution
## Exposition ## Exposition
@ -57,3 +57,7 @@ realizes he/she has a gun and could terminate one or many
corrupt leaders, he/she is mugged and the great leaders corrupt leaders, he/she is mugged and the great leaders
pay the bar security to get everyone out since they can't pay the bar security to get everyone out since they can't
concentrate. concentrate.
## Climax
## Falling action
## Resolution

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#version 450
layout(binding = 1) uniform sampler2D texSampler;
layout(location = 0) in vec3 fragColor;
layout(location = 1) in vec2 fragTexCoord;
layout(location = 0) out vec4 outColor;
void main() {
outColor = texture(texSampler, fragTexCoord);
}

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#version 450
layout(binding = 0) uniform UniformBufferObject {
mat4 model;
mat4 view;
mat4 proj;
} ubo;
layout(location = 0) in vec3 inPosition;
layout(location = 1) in vec3 inColor;
layout(location = 2) in vec2 inTexCoord;
layout(location = 0) out vec3 fragColor;
layout(location = 1) out vec2 fragTexCoord;
void main() {
gl_Position = ubo.proj * ubo.view * ubo.model * vec4(inPosition, 1.0);
fragColor = inColor;
fragTexCoord = inTexCoord;
}

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#ifndef CAMERA_H
#define CAMERA_H
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <vector>
const float CAMERA_FOV = 60.0f;
const float SENSITIVITY = 0.1f;
const float SPEED = 2.5f;
const float PLAYER_HEIGHT = 0.5f;
const float MAP_FLOOR = 0.0f;
const float YAW = 0.0f;
const float PITCH = 0.0f;
const float ZOOM = 45.0f;
enum Camera_Movement {
FORWARD,
BACKWARD,
LEFT,
RIGHT
};
class Camera {
public:
glm::vec3 Position;
glm::vec3 Front;
glm::vec3 Up;
glm::vec3 Right;
glm::vec3 WorldUp;
float Yaw;
float Pitch;
float MovementSpeed;
float MouseSensitivity;
float Zoom;
// Constructor with vectors
Camera(glm::vec3 position = glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f), float yaw = YAW, float pitch = PITCH) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVITY), Zoom(ZOOM) {
Position = position;
Position.y = PLAYER_HEIGHT + MAP_FLOOR;
WorldUp = up;
Yaw = yaw;
Pitch = pitch;
updateCameraVectors();
}
// Returns the view matrix calculated using Euler Angles and the LookAt Matrix
glm::mat4 GetViewMatrix() {
return glm::lookAt(Position, Position + Front, Up);
}
void ProcessKeyboard(Camera_Movement direction, float deltaTime) {
float velocity = MovementSpeed * deltaTime;
if (direction == FORWARD)
Position += Front * velocity;
if (direction == BACKWARD)
Position -= Front * velocity;
if (direction == LEFT)
Position -= Right * velocity;
if (direction == RIGHT)
Position += Right * velocity;
Position.y = PLAYER_HEIGHT + MAP_FLOOR;
}
// processes input received from a mouse input system. Expects the offset value in both the x and y direction.
void ProcessMouseMovement(float xoffset, float yoffset, GLboolean constrainPitch = true) {
xoffset *= MouseSensitivity;
yoffset *= MouseSensitivity;
Yaw += xoffset;
Pitch += yoffset;
// make sure that when pitch is out of bounds, screen doesn't get flipped
if (constrainPitch)
{
if (Pitch > 89.0f)
Pitch = 89.0f;
if (Pitch < -89.0f)
Pitch = -89.0f;
}
// update Front, Right and Up Vectors using the updated Euler angles
updateCameraVectors();
}
// processes input received from a mouse scroll-wheel event. Only requires input on the vertical wheel-axis
void ProcessMouseScroll(float yoffset) {
Zoom -= (float)yoffset;
if (Zoom < 1.0f)
Zoom = 1.0f;
if (Zoom > 45.0f)
Zoom = 45.0f;
}
private:
// calculates the front vector from the Camera's (updated) Euler Angles
void updateCameraVectors() {
glm::vec3 front; // Calculate the new Front vector
front.x = cos(glm::radians(Yaw)) * cos(glm::radians(Pitch));
front.y = sin(glm::radians(Pitch));
front.z = sin(glm::radians(Yaw)) * cos(glm::radians(Pitch));
Front = glm::normalize(front); // Normalize the vectors, because their length
Right = glm::normalize(glm::cross(Front, WorldUp)); // gets closer to 0 the more you look up or
Up = glm::normalize(glm::cross(Right, Front)); // down which results in slower movement.
}
};
#endif

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