96 lines
No EOL
2.3 KiB
C++
96 lines
No EOL
2.3 KiB
C++
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#include <SDL2/SDL.h>
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#include <chrono>
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#include <memory>
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#include <print>
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#include <random>
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template <auto sdl_destroyfunc>
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using sdl_deleter_t = decltype([](auto* ptr) { sdl_destroyfunc(ptr); });
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template <class SDLT, auto sdl_destroyfunc>
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using sdl_wrapper_t = std::unique_ptr<SDLT, sdl_deleter_t<sdl_destroyfunc>>;
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using window_t = sdl_wrapper_t<SDL_Window, SDL_DestroyWindow>;
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using surface_t = sdl_wrapper_t<SDL_Surface, SDL_FreeSurface>;
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using renderer_t = sdl_wrapper_t<SDL_Renderer, SDL_DestroyRenderer>;
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struct Point {
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int x;
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int y;
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};
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auto operator+(Point a, Point b) {
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return Point{.x = a.x + b.x, .y = a.y + b.y};
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}
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constexpr int width = 3440;
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constexpr int height = 1440;
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int main() {
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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std::println("fuck");
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return EXIT_FAILURE;
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}
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{
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window_t window{SDL_CreateWindow(
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"random walk", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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width, height, SDL_WINDOW_FULLSCREEN
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)};
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renderer_t renderer{
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SDL_CreateRenderer(window.get(), -1, SDL_RENDERER_ACCELERATED)
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};
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SDL_SetRenderDrawColor(renderer.get(), 0, 0, 0, 0);
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SDL_RenderClear(renderer.get());
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SDL_SetRenderDrawColor(renderer.get(), 255, 0, 0, 255);
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if (!window) {
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std::println(
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"Window could not be created! SDL_Error: {}", SDL_GetError()
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);
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return EXIT_FAILURE;
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}
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auto surface = surface_t{SDL_GetWindowSurface(window.get())};
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auto point = Point{.x = width / 2, .y = height / 2};
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const Point directions[] = {
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{.x = -1, .y = 0},
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{.x = 1, .y = 0},
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{.x = 0, .y = -1},
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{.x = 0, .y = 1}
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};
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std::mt19937_64 rne(std::random_device{}());
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std::uniform_int_distribution<int> dist(0, 3);
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bool quit = false;
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auto next_frame = std::chrono::steady_clock::now();
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while (!quit) {
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SDL_RenderDrawPoint(renderer.get(), point.x, point.y);
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Point newpoint;
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do {
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newpoint = point + directions[dist(rne)];
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} while (newpoint.x < 0 or newpoint.x >= width or newpoint.y < 0 or
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newpoint.y >= height);
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point = newpoint;
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if (std::chrono::steady_clock::now() > next_frame) {
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next_frame += std::chrono::milliseconds{200};
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SDL_Event e;
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while (SDL_PollEvent(&e)) {
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if (e.type == SDL_QUIT) { quit = true; }
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}
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SDL_RenderPresent(renderer.get());
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}
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}
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}
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SDL_Quit();
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// leaking memory, nothing I can do
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} |