1 | #ifndef _SDL_GAME_H
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2 | #define _SDL_GAME_H
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3 |
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4 | #include <chrono>
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5 | #include <map>
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6 | #include <vector>
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7 |
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8 | #include <vulkan/vulkan.h>
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9 |
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10 | #include <SDL2/SDL.h>
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11 |
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12 | #define GLM_FORCE_RADIANS
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13 | #define GLM_FORCE_DEPTH_ZERO_TO_ONE // Since, in Vulkan, the depth range is 0 to 1 instead of -1 to 1
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14 | #define GLM_FORCE_RIGHT_HANDED
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15 |
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16 | #include <glm/glm.hpp>
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17 | #include <glm/gtc/matrix_transform.hpp>
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18 |
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19 | #include "IMGUI/imgui_impl_vulkan.h"
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20 |
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21 | #include "consts.hpp"
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22 | #include "game-gui-sdl.hpp"
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23 | #include "vulkan-utils.hpp"
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24 | #include "graphics-pipeline_vulkan.hpp"
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25 | #include "vulkan-buffer.hpp"
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26 |
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27 | using namespace glm;
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28 | using namespace std;
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29 | using namespace std::chrono;
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30 |
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31 | #define VulkanGame NewVulkanGame
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32 |
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33 | #ifdef NDEBUG
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34 | const bool ENABLE_VALIDATION_LAYERS = false;
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35 | #else
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36 | const bool ENABLE_VALIDATION_LAYERS = true;
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37 | #endif
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38 |
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39 | // TODO: Consider if there is a better way of dealing with all the vertex types and ssbo types, maybe
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40 | // by consolidating some and trying to keep new ones to a minimum
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41 |
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42 | struct ModelVertex {
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43 | vec3 pos;
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44 | vec3 color;
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45 | vec2 texCoord;
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46 | vec3 normal;
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47 | unsigned int objIndex;
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48 | };
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49 |
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50 | struct LaserVertex {
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51 | vec3 pos;
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52 | vec2 texCoord;
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53 | unsigned int objIndex;
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54 | };
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55 |
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56 | struct ExplosionVertex {
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57 | vec3 particleStartVelocity;
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58 | float particleStartTime;
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59 | unsigned int objIndex;
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60 | };
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61 |
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62 | // Currently using these as the dynamic UBO types as well
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63 | // TODO: Rename them to something more general
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64 |
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65 | struct SSBO_ModelObject {
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66 | alignas(16) mat4 model;
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67 | };
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68 |
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69 | struct SSBO_Asteroid {
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70 | alignas(16) mat4 model;
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71 | alignas(4) float hp;
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72 | alignas(4) unsigned int deleted;
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73 | };
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74 |
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75 | struct UBO_VP_mats {
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76 | alignas(16) mat4 view;
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77 | alignas(16) mat4 proj;
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78 | };
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79 |
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80 | // TODO: Use this struct for uniform buffers as well and probably combine it with the VulkanBuffer class
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81 | // Also, probably better to make this a vector of structs where each struct
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82 | // has a VkBuffer, VkDeviceMemory, and VkDescriptorBufferInfo
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83 | // TODO: Maybe change the structure here since VkDescriptorBufferInfo already stores a reference to the VkBuffer
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84 | struct BufferSet {
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85 | vector<VkBuffer> buffers;
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86 | vector<VkDeviceMemory> memory;
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87 | vector<VkDescriptorBufferInfo> infoSet;
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88 | VkBufferUsageFlags usages;
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89 | VkMemoryPropertyFlags properties;
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90 | };
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91 |
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92 | // TODO: Change the index type to uint32_t and check the Vulkan Tutorial loading model section as a reference
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93 | // TODO: Create a typedef for index type so I can easily change uin16_t to something else later
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94 | // TODO: Maybe create a typedef for each of the templated SceneObject types
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95 | template<class VertexType>
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96 | struct SceneObject {
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97 | vector<VertexType> vertices;
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98 | vector<uint16_t> indices;
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99 |
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100 | mat4 model_base;
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101 | mat4 model_transform;
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102 |
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103 | // TODO: Figure out if I should make child classes that have these fields instead of putting them in the
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104 | // parent class
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105 | vec3 center; // currently only matters for asteroids
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106 | float radius; // currently only matters for asteroids
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107 |
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108 | // Move the targetAsteroid stuff out of this class since it is very specific to lasers
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109 | // and makes moving SceneObject into its own header file more problematic
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110 | SceneObject<ModelVertex>* targetAsteroid; // currently only used for lasers
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111 | };
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112 |
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113 | // TODO: Figure out how to include an optional ssbo parameter for each object
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114 | // Could probably use the same approach to make indices optional
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115 | // Figure out if there are sufficient use cases to make either of these optional or is it fine to make
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116 | // them mandatory
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117 |
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118 |
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119 | // TODO: Look into using dynamic_cast to check types of SceneObject and EffectOverTime
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120 |
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121 | // TODO: Maybe move this to a different header
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122 |
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123 | enum UIValueType {
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124 | UIVALUE_INT,
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125 | UIVALUE_DOUBLE,
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126 | };
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127 |
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128 | struct UIValue {
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129 | UIValueType type;
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130 | string label;
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131 | void* value;
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132 |
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133 | UIValue(UIValueType _type, string _label, void* _value) : type(_type), label(_label), value(_value) {}
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134 | };
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135 |
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136 | class VulkanGame {
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137 |
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138 | public:
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139 |
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140 | VulkanGame();
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141 | ~VulkanGame();
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142 |
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143 | void run(int width, int height, unsigned char guiFlags);
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144 |
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145 | private:
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146 |
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147 | static VKAPI_ATTR VkBool32 VKAPI_CALL debugCallback(
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148 | VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity,
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149 | VkDebugUtilsMessageTypeFlagsEXT messageType,
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150 | const VkDebugUtilsMessengerCallbackDataEXT* pCallbackData,
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151 | void* pUserData);
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152 |
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153 | // TODO: Maybe pass these in as parameters to some Camera class
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154 | const float NEAR_CLIP = 0.1f;
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155 | const float FAR_CLIP = 100.0f;
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156 | const float FOV_ANGLE = 67.0f; // means the camera lens goes from -33 deg to 33 deg
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157 |
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158 | bool done;
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159 |
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160 | vec3 cam_pos;
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161 |
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162 | // TODO: Good place to start using smart pointers
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163 | GameGui* gui;
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164 |
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165 | SDL_version sdlVersion;
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166 | SDL_Window* window;
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167 |
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168 | VkInstance instance;
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169 | VkDebugUtilsMessengerEXT debugMessenger;
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170 | VkSurfaceKHR vulkanSurface;
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171 | VkPhysicalDevice physicalDevice;
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172 | VkDevice device;
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173 |
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174 | VkQueue graphicsQueue;
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175 | VkQueue presentQueue;
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176 |
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177 | // TODO: Maybe make a swapchain struct for convenience
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178 | VkSurfaceFormatKHR swapChainSurfaceFormat;
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179 | VkPresentModeKHR swapChainPresentMode;
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180 | VkExtent2D swapChainExtent;
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181 | uint32_t swapChainMinImageCount;
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182 | uint32_t swapChainImageCount;
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183 |
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184 | VkSwapchainKHR swapChain;
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185 | vector<VkImage> swapChainImages;
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186 | vector<VkImageView> swapChainImageViews;
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187 | vector<VkFramebuffer> swapChainFramebuffers;
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188 |
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189 | VkRenderPass renderPass;
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190 |
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191 | VkCommandPool resourceCommandPool;
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192 |
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193 | vector<VkCommandPool> commandPools;
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194 | vector<VkCommandBuffer> commandBuffers;
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195 |
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196 | VulkanImage depthImage;
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197 |
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198 | // These are per frame
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199 | vector<VkSemaphore> imageAcquiredSemaphores;
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200 | vector<VkSemaphore> renderCompleteSemaphores;
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201 |
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202 | // These are per swap chain image
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203 | vector<VkFence> inFlightFences;
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204 |
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205 | uint32_t imageIndex;
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206 | uint32_t currentFrame;
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207 |
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208 | bool shouldRecreateSwapChain;
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209 |
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210 | VkSampler textureSampler;
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211 |
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212 | VulkanImage floorTextureImage;
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213 | VkDescriptorImageInfo floorTextureImageDescriptor;
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214 |
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215 | mat4 viewMat, projMat;
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216 |
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217 | // Maybe at some point create an imgui pipeline class, but I don't think it makes sense right now
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218 | VkDescriptorPool imguiDescriptorPool;
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219 |
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220 | // TODO: Probably restructure the GraphicsPipeline_Vulkan class based on what I learned about descriptors and textures
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221 | // while working on graphics-library. Double-check exactly what this was and note it down here.
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222 | // Basically, I think the point was that if I have several models that all use the same shaders and, therefore,
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223 | // the same pipeline, but use different textures, the approach I took when initially creating GraphicsPipeline_Vulkan
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224 | // wouldn't work since the whole pipeline couldn't have a common set of descriptors for the textures
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225 | GraphicsPipeline_Vulkan<ModelVertex> modelPipeline;
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226 |
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227 | BufferSet uniformBuffers_modelPipeline;
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228 | BufferSet objectBuffers_modelPipeline;
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229 |
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230 | VulkanBuffer<UBO_VP_mats> uniforms_modelPipeline;
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231 | VulkanBuffer<SSBO_ModelObject> objects_modelPipeline;
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232 |
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233 | // TODO: Maybe make the ubo objects part of the pipeline class since there's only one ubo
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234 | // per pipeline.
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235 | // Or maybe create a higher level wrapper around GraphicsPipeline_Vulkan to hold things like
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236 | // the objects vector, the ubo, and the ssbo
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237 |
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238 | // TODO: Rename *_VP_mats to *_uniforms and possibly use different types for each one
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239 | // if there is a need to add other uniform variables to one or more of the shaders
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240 |
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241 | vector<SceneObject<ModelVertex>> modelObjects;
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242 |
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243 | /*** High-level vars ***/
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244 |
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245 | // TODO: Just typedef the type of this function to RenderScreenFn or something since it's used in a few places
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246 | void (VulkanGame::* currentRenderScreenFn)(int width, int height);
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247 |
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248 | map<string, vector<UIValue>> valueLists;
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249 |
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250 | int score;
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251 | float fps;
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252 |
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253 | // TODO: Make a separate singleton Timer class
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254 | time_point<steady_clock> startTime;
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255 | float fpsStartTime, curTime, prevTime, elapsedTime;
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256 |
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257 | int frameCount;
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258 |
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259 | /*** Functions ***/
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260 |
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261 | bool initUI(int width, int height, unsigned char guiFlags);
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262 | void initVulkan();
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263 | void initGraphicsPipelines();
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264 | void initMatrices();
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265 | void renderLoop();
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266 | void updateScene();
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267 | void cleanup();
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268 |
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269 | void createVulkanInstance(const vector<const char*>& validationLayers);
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270 | void setupDebugMessenger();
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271 | void populateDebugMessengerCreateInfo(VkDebugUtilsMessengerCreateInfoEXT& createInfo);
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272 | void createVulkanSurface();
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273 | void pickPhysicalDevice(const vector<const char*>& deviceExtensions);
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274 | bool isDeviceSuitable(VkPhysicalDevice physicalDevice, const vector<const char*>& deviceExtensions);
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275 | void createLogicalDevice(const vector<const char*>& validationLayers,
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276 | const vector<const char*>& deviceExtensions);
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277 | void chooseSwapChainProperties();
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278 | void createSwapChain();
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279 | void createImageViews();
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280 | void createResourceCommandPool();
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281 | void createImageResources();
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282 | VkFormat findDepthFormat(); // TODO: Declare/define (in the cpp file) this function in some util functions section
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283 | void createRenderPass();
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284 | void createCommandPools();
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285 | void createFramebuffers();
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286 | void createCommandBuffers();
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287 | void createSyncObjects();
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288 |
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289 | void createTextureSampler();
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290 |
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291 | void initImGuiOverlay();
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292 | void cleanupImGuiOverlay();
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293 |
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294 | // TODO: Maybe move these to a different class, possibly VulkanBuffer or some new related class
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295 |
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296 | void createBufferSet(VkDeviceSize bufferSize, VkBufferUsageFlags usages, VkMemoryPropertyFlags properties,
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297 | BufferSet& set);
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298 |
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299 | void resizeBufferSet(BufferSet& set, VkDeviceSize newSize, VkCommandPool commandPool, VkQueue graphicsQueue,
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300 | bool copyData);
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301 |
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302 | // TODO: Since addObject() returns a reference to the new object now,
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303 | // stop using objects.back() to access the object that was just created
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304 | template<class VertexType, class SSBOType>
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305 | SceneObject<VertexType>& addObject(vector<SceneObject<VertexType>>& objects,
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306 | GraphicsPipeline_Vulkan<VertexType>& pipeline,
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307 | const vector<VertexType>& vertices, vector<uint16_t> indices,
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308 | VulkanBuffer<SSBOType>& objectBuffer, SSBOType ssbo);
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309 |
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310 | template<class VertexType>
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311 | vector<VertexType> addObjectIndex(unsigned int objIndex, vector<VertexType> vertices);
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312 |
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313 | template<class VertexType>
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314 | vector<VertexType> addVertexNormals(vector<VertexType> vertices);
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315 |
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316 | template<class VertexType>
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317 | void centerObject(SceneObject<VertexType>& object);
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318 |
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319 | void renderFrame(ImDrawData* draw_data);
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320 | void presentFrame();
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321 |
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322 | void recreateSwapChain();
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323 |
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324 | void cleanupSwapChain();
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325 |
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326 | /*** High-level functions ***/
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327 |
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328 | void renderMainScreen(int width, int height);
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329 | void renderGameScreen(int width, int height);
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330 |
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331 | void initGuiValueLists(map<string, vector<UIValue>>& valueLists);
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332 | void renderGuiValueList(vector<UIValue>& values);
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333 |
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334 | void goToScreen(void (VulkanGame::* renderScreenFn)(int width, int height));
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335 | void quitGame();
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336 | };
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337 |
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338 | // TODO: Right now, it's basically necessary to pass the identity matrix in for ssbo.model and to change
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339 | // the model matrix later by setting model_transform and then calculating the new ssbo.model.
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340 | // Figure out a better way to allow the model matrix to be set during object creation
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341 | template<class VertexType, class SSBOType>
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342 | SceneObject<VertexType>& VulkanGame::addObject(vector<SceneObject<VertexType>>& objects,
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343 | GraphicsPipeline_Vulkan<VertexType>& pipeline,
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344 | const vector<VertexType>& vertices, vector<uint16_t> indices,
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345 | VulkanBuffer<SSBOType>& objectBuffer, SSBOType ssbo) {
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346 | // TODO: Use the model field of ssbo to set the object's model_base
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347 | // currently, the passed-in model is useless since it gets overridden when ssbo.model is recalculated
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348 | size_t numVertices = pipeline.getNumVertices();
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349 |
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350 | for (uint16_t& idx : indices) {
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351 | idx += numVertices;
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352 | }
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353 |
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354 | objects.push_back({ vertices, indices, mat4(1.0f), mat4(1.0f) });
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355 | objectBuffer.add(ssbo);
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356 |
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357 | SceneObject<VertexType>& obj = objects.back();
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358 |
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359 | // TODO: Specify whether to center the object outside of this function or, worst case, maybe
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360 | // with a boolean being passed in here, so that I don't have to rely on checking the specific object
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361 | // type
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362 | // TODO: Actually, I've already defined a no-op centerObject method for explosions
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363 | // Maybe I should do the same for lasers and remove this conditional altogether
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364 | if (!is_same_v<VertexType, LaserVertex> && !is_same_v<VertexType, ExplosionVertex>) {
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365 | centerObject(obj);
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366 | }
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367 |
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368 | pipeline.addObject(obj.vertices, obj.indices, resourceCommandPool, graphicsQueue);
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369 |
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370 | return obj;
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371 | }
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372 |
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373 | template<class VertexType>
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374 | vector<VertexType> VulkanGame::addObjectIndex(unsigned int objIndex, vector<VertexType> vertices) {
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375 | for (VertexType& vertex : vertices) {
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376 | vertex.objIndex = objIndex;
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377 | }
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378 |
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379 | return vertices;
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380 | }
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381 |
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382 | template<class VertexType>
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383 | vector<VertexType> VulkanGame::addVertexNormals(vector<VertexType> vertices) {
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384 | for (unsigned int i = 0; i < vertices.size(); i += 3) {
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385 | vec3 p1 = vertices[i].pos;
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386 | vec3 p2 = vertices[i + 1].pos;
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387 | vec3 p3 = vertices[i + 2].pos;
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388 |
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389 | vec3 normal = normalize(cross(p2 - p1, p3 - p1));
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390 |
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391 | // Add the same normal for all 3 vertices
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392 | vertices[i].normal = normal;
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393 | vertices[i + 1].normal = normal;
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394 | vertices[i + 2].normal = normal;
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395 | }
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396 |
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397 | return vertices;
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398 | }
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399 |
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400 | template<class VertexType>
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401 | void VulkanGame::centerObject(SceneObject<VertexType>& object) {
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402 | vector<VertexType>& vertices = object.vertices;
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403 |
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404 | float min_x = vertices[0].pos.x;
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405 | float max_x = vertices[0].pos.x;
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406 | float min_y = vertices[0].pos.y;
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407 | float max_y = vertices[0].pos.y;
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408 | float min_z = vertices[0].pos.z;
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409 | float max_z = vertices[0].pos.z;
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410 |
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411 | // start from the second point
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412 | for (unsigned int i = 1; i < vertices.size(); i++) {
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413 | vec3& pos = vertices[i].pos;
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414 |
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415 | if (min_x > pos.x) {
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416 | min_x = pos.x;
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417 | }
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418 | else if (max_x < pos.x) {
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419 | max_x = pos.x;
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420 | }
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421 |
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422 | if (min_y > pos.y) {
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423 | min_y = pos.y;
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424 | }
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425 | else if (max_y < pos.y) {
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426 | max_y = pos.y;
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427 | }
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428 |
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429 | if (min_z > pos.z) {
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430 | min_z = pos.z;
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431 | }
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432 | else if (max_z < pos.z) {
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433 | max_z = pos.z;
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434 | }
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435 | }
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436 |
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437 | vec3 center = vec3(min_x + max_x, min_y + max_y, min_z + max_z) / 2.0f;
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438 |
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439 | for (unsigned int i = 0; i < vertices.size(); i++) {
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440 | vertices[i].pos -= center;
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441 | }
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442 |
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443 | object.radius = std::max(max_x - center.x, max_y - center.y);
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444 | object.radius = std::max(object.radius, max_z - center.z);
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445 |
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446 | object.center = vec3(0.0f, 0.0f, 0.0f);
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447 | }
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448 |
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449 | #endif // _SDL_GAME_H
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