2023-05-01 13:13:35 +00:00
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#include "application.h"
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2022-09-13 18:25:18 +00:00
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2023-10-01 10:38:27 +00:00
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#include <cinttypes>
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2023-04-29 14:22:25 +00:00
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#include <filesystem>
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#include <memory>
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#include <stdexcept>
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#include <string>
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#include <thread>
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2023-10-01 10:38:27 +00:00
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#include <numeric>
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2022-10-27 16:58:30 +00:00
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2023-04-29 14:22:25 +00:00
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#include <glm/mat4x4.hpp>
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2023-10-01 10:38:27 +00:00
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#include "imgui/imgui.h"
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#include "imgui/imgui_impl_sdl2.h"
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#include "imgui/imgui_impl_vulkan.h"
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2023-05-01 13:13:35 +00:00
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#include "gfx.h"
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#include "gfx_device.h"
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#include "input_manager.h"
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#include "log.h"
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2023-05-14 13:40:16 +00:00
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#include "resources/font.h"
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2023-05-01 13:13:35 +00:00
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#include "resources/material.h"
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#include "resources/mesh.h"
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#include "resources/shader.h"
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#include "resources/texture.h"
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2023-08-31 09:51:12 +00:00
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#include "systems/mesh_render_system.h"
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#include "components/transform.h"
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2023-05-01 13:13:35 +00:00
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#include "scene.h"
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#include "scene_manager.h"
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#include "window.h"
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2022-11-10 14:12:29 +00:00
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2022-12-15 15:54:11 +00:00
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#ifdef _MSC_VER
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#include <windows.h>
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#include <direct.h>
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2023-04-29 14:22:25 +00:00
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#define WIN_MAX_PATH 260
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#endif
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static struct ImGuiThings {
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ImGuiContext* context;
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} im_gui_things;
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2023-03-13 17:10:46 +00:00
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namespace engine {
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2023-10-02 11:54:37 +00:00
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static std::filesystem::path getResourcesPath()
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{
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std::filesystem::path resourcesPath{};
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2022-12-15 15:54:11 +00:00
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#ifdef _MSC_VER
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2023-10-02 11:54:37 +00:00
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// get the path of the currently running process
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CHAR exeDirBuf[MAX_PATH + 1];
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GetModuleFileNameA(NULL, exeDirBuf, WIN_MAX_PATH + 1);
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std::filesystem::path cwd = std::filesystem::path(exeDirBuf).parent_path();
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(void)_chdir((const char*)std::filesystem::absolute(cwd).c_str());
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2022-12-15 15:54:11 +00:00
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#else
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std::filesystem::path cwd = std::filesystem::current_path();
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#endif
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2023-10-02 11:54:37 +00:00
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if (std::filesystem::is_directory(cwd / "res")) {
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resourcesPath = cwd / "res";
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}
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else {
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resourcesPath = cwd.parent_path() / "share" / "sdltest";
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}
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2023-10-02 11:54:37 +00:00
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if (std::filesystem::is_directory(resourcesPath) == false) {
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resourcesPath = cwd.root_path() / "usr" / "local" / "share" / "sdltest";
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}
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2023-05-14 23:27:31 +00:00
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2023-10-02 11:54:37 +00:00
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if (std::filesystem::is_directory(resourcesPath) == false) {
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throw std::runtime_error("Unable to determine resources location. CWD: " + cwd.string());
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}
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return resourcesPath;
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}
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Application::Application(const char* appName, const char* appVersion, gfx::GraphicsSettings graphicsSettings)
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{
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window_ = std::make_unique<Window>(appName, true, false);
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input_manager_ = std::make_unique<InputManager>(window_.get());
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scene_manager_ = std::make_unique<SceneManager>(this);
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2023-10-02 11:54:37 +00:00
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// get base path for resources
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resources_path_ = getResourcesPath();
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// register resource managers
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RegisterResourceManager<Mesh>();
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RegisterResourceManager<Material>();
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RegisterResourceManager<Texture>();
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RegisterResourceManager<Shader>();
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RegisterResourceManager<Font>();
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2023-10-02 11:54:37 +00:00
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im_gui_things.context = ImGui::CreateContext();
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// ImGuiIO& io = ImGui::GetIO()
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ImGui_ImplSDL2_InitForVulkan(window_->GetHandle());
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renderer_ = std::make_unique<Renderer>(appName, appVersion, window_->GetHandle(), graphicsSettings);
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/* default fonts */
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{
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auto monoFont = std::make_unique<Font>(GetResourcePath("engine/fonts/mono.ttf"));
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GetResourceManager<Font>()->AddPersistent("builtin.mono", std::move(monoFont));
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}
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2023-10-02 11:54:37 +00:00
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/* default shaders */
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{
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Shader::VertexParams vertParams{};
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vertParams.has_normal = true;
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vertParams.has_tangent = true;
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vertParams.has_uv0 = true;
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Shader::ShaderSettings shaderSettings{};
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shaderSettings.vertexParams = vertParams;
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shaderSettings.alpha_blending = false;
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shaderSettings.cull_backface = true;
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shaderSettings.write_z = true;
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shaderSettings.render_order = 0;
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auto texturedShader = std::make_unique<Shader>(renderer(), GetResourcePath("engine/shaders/standard.vert").c_str(),
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GetResourcePath("engine/shaders/standard.frag").c_str(), shaderSettings);
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GetResourceManager<Shader>()->AddPersistent("builtin.standard", std::move(texturedShader));
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}
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{
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Shader::VertexParams vertParams{};
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vertParams.has_normal = true;
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vertParams.has_tangent = true;
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vertParams.has_uv0 = true;
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Shader::ShaderSettings shaderSettings{};
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shaderSettings.vertexParams = vertParams;
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shaderSettings.alpha_blending = false;
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shaderSettings.cull_backface = true;
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shaderSettings.write_z = true;
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shaderSettings.render_order = 0;
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2023-11-05 01:04:05 +00:00
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auto fancyShader = std::make_unique<Shader>(renderer(), GetResourcePath("engine/shaders/fancy.vert").c_str(),
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GetResourcePath("engine/shaders/fancy.frag").c_str(), shaderSettings);
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GetResourceManager<Shader>()->AddPersistent("builtin.fancy", std::move(fancyShader));
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}
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{
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Shader::VertexParams vertParams{};
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vertParams.has_normal = true;
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vertParams.has_tangent = true;
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vertParams.has_uv0 = true;
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Shader::ShaderSettings shaderSettings{};
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shaderSettings.vertexParams = vertParams;
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shaderSettings.alpha_blending = false;
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shaderSettings.cull_backface = true;
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shaderSettings.write_z = true;
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shaderSettings.render_order = 0;
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auto skyboxShader = std::make_unique<Shader>(renderer(), GetResourcePath("engine/shaders/skybox.vert").c_str(),
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GetResourcePath("engine/shaders/skybox.frag").c_str(), shaderSettings);
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GetResourceManager<Shader>()->AddPersistent("builtin.skybox", std::move(skyboxShader));
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}
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2023-11-05 01:04:05 +00:00
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#if 0
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{
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Shader::VertexParams vertParams{};
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vertParams.has_normal = true;
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vertParams.has_tangent = true;
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vertParams.has_uv0 = true;
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Shader::ShaderSettings shaderSettings{};
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shaderSettings.vertexParams = vertParams;
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shaderSettings.alpha_blending = true;
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shaderSettings.cull_backface = true;
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shaderSettings.write_z = false;
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shaderSettings.render_order = 1;
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2023-11-05 01:04:05 +00:00
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auto quadShader = std::make_unique<Shader>(renderer(), GetResourcePath("engine/shaders/quad.vert").c_str(),
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GetResourcePath("engine/shaders/quad.frag").c_str(), shaderSettings);
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2023-11-05 01:04:05 +00:00
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GetResourceManager<Shader>()->AddPersistent("builtin.quad", std::move(quadShader));
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2023-10-01 10:38:27 +00:00
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}
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#endif
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/* default textures */
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{
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auto whiteTexture = LoadTextureFromFile(GetResourcePath("engine/textures/white.png"), Texture::Filtering::kOff, renderer());
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GetResourceManager<Texture>()->AddPersistent("builtin.white", std::move(whiteTexture));
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2023-10-01 10:38:27 +00:00
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}
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2023-10-02 11:54:37 +00:00
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}
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Application::~Application()
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{
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renderer_->GetDevice()->ShutdownImguiBackend();
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ImGui_ImplSDL2_Shutdown();
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ImGui::DestroyContext(im_gui_things.context);
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}
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void Application::GameLoop()
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{
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LOG_DEBUG("Begin game loop...");
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constexpr int FPS_LIMIT = 240;
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constexpr auto FRAMETIME_LIMIT = std::chrono::nanoseconds(1000000000 / FPS_LIMIT);
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auto beginFrame = std::chrono::steady_clock::now();
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auto endFrame = beginFrame + FRAMETIME_LIMIT;
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auto lastTick = window_->GetNanos();
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std::array<float, 20> delta_times{};
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struct DebugMenuState {
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bool menu_active = false;
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bool show_info_window = true;
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} debug_menu_state;
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// single-threaded game loop
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while (window_->IsRunning()) {
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/* logic */
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const float avg_fps = static_cast<float>(delta_times.size()) / std::accumulate(delta_times.begin(), delta_times.end(), 0.0f);
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Scene* scene = scene_manager_->UpdateActiveScene(window_->dt());
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uint64_t now = window_->GetNanos();
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if (now - lastTick >= 1000000000LL * 5LL) [[unlikely]] {
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lastTick = now;
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LOG_INFO("fps: {}", std::lroundf(avg_fps));
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// renderer()->GetDevice()->LogPerformanceInfo();
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window_->ResetAvgFPS();
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}
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if (window_->GetKeyPress(inputs::Key::K_F5)) {
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bool show_window = window_->MouseCaptured();
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debug_menu_state.menu_active = show_window;
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window_->SetRelativeMouseMode(!show_window);
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}
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if (window_->GetKeyPress(inputs::Key::K_F6)) {
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debug_menu_state.show_info_window = !debug_menu_state.show_info_window;
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}
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ImGui_ImplVulkan_NewFrame();
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ImGui_ImplSDL2_NewFrame();
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ImGui::NewFrame();
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if (debug_menu_state.menu_active) {
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if (ImGui::Begin("debugMenu")) {
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ImGui::Text("Test!");
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ImGui::Text("FPS: %.3f", std::roundf(avg_fps));
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}
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ImGui::End();
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}
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if (debug_menu_state.show_info_window) {
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if (ImGui::Begin(
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"infoWindow", nullptr,
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ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoFocusOnAppearing)) {
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ImGui::Text("Scene hierarchy:");
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std::function<int(Entity, int)> find_depth = [&](Entity e, int current_depth) -> int {
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Entity parent = scene->GetComponent<TransformComponent>(e)->parent;
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if (parent == 0)
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return current_depth;
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else {
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return find_depth(parent, current_depth + 1);
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}
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};
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if (scene)
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{
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for (Entity i = 1; i < scene->next_entity_id_; ++i) {
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auto t = scene->GetComponent<TransformComponent>(i);
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std::string tabs{};
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int depth = find_depth(i, 0);
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for (int j = 0; j < depth; ++j) tabs += std::string{" "};
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ImGui::Text("%s%s", tabs.c_str(), t->tag.c_str());
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ImGui::Text("%.1f %.1f %.1f", t->position.x, t->position.y, t->position.z);
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}
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}
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else {
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ImGui::Text("No scene active!");
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}
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}
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ImGui::End();
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}
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ImGui::Render();
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const RenderList* static_list = nullptr;
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const RenderList* dynamic_list = nullptr;
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glm::mat4 camera_transform{1.0f};
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if (scene) {
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camera_transform = scene->GetComponent<TransformComponent>(scene->GetEntity("camera"))->world_matrix;
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auto mesh_render_system = scene->GetSystem<MeshRenderSystem>();
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static_list = mesh_render_system->GetStaticRenderList();
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dynamic_list = mesh_render_system->GetDynamicRenderList();
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}
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renderer_->PreRender(window()->GetWindowResized(), camera_transform);
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renderer_->Render(static_list, dynamic_list);
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2023-08-22 22:41:08 +00:00
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2023-10-02 11:54:37 +00:00
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/* poll events */
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window_->GetInputAndEvents();
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2023-05-14 23:27:31 +00:00
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2023-10-02 11:54:37 +00:00
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/* fps limiter */
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if (enable_frame_limiter_) {
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std::this_thread::sleep_until(endFrame);
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}
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beginFrame = endFrame;
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endFrame = beginFrame + FRAMETIME_LIMIT;
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delta_times[window_->GetFrameCount() % delta_times.size()] = window_->dt();
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2023-05-14 23:27:31 +00:00
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}
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2023-10-02 11:54:37 +00:00
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renderer_->GetDevice()->WaitIdle();
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2022-09-13 18:25:18 +00:00
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}
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2023-05-14 23:27:31 +00:00
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2023-10-02 11:54:37 +00:00
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} // namespace engine
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