104 lines
2.1 KiB
C++
104 lines
2.1 KiB
C++
#include "Application.hpp"
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#include <iostream>
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#include <SDL.h>
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Application::Application(int width, int height, const char* title)
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{
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window = SDL_CreateWindow(
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title,
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SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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width, height,
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SDL_WINDOW_SHOWN
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);
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if (window == nullptr)
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{
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char errbuf[512];
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SDL_GetErrorMsg(errbuf, 512);
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std::cerr << "Failed to create SDL Window: " << std::endl
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<< errbuf << std::endl;
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return;
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}
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// Let's just pretend we're the first application in this program to create a renderer :) what could go wrong
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renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
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if (renderer == nullptr)
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{
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char errbuf[512];
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SDL_GetErrorMsg(errbuf, 512);
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std::cerr << "Failed to create SDL Renderer: " << std::endl
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<< errbuf << std::endl;
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return;
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}
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SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
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field = new FluidField(60);
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before = std::chrono::steady_clock::now();
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}
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Application::~Application()
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{
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delete field;
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SDL_DestroyRenderer(renderer); // Let's just destroy this renderer regardless of other applications in this program :) what could go wrong
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SDL_DestroyWindow(window);
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}
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void Application::Launch()
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{
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if (renderer == nullptr || window == nullptr)
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{
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throw std::runtime_error("Can't launch application. Window or Renderer is in invalid state.");
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}
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while (!shouldClose)
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{
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HandleEvents();
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Update();
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Render();
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}
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}
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void Application::HandleEvents()
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{
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static SDL_Event event;
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while (SDL_PollEvent(&event))
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{
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if (event.type == SDL_WINDOWEVENT)
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{
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switch (event.window.event)
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{
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case SDL_WINDOWEVENT_CLOSE:
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shouldClose = true;
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break;
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}
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}
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}
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}
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void Application::Update()
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{
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double frametime = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::steady_clock::now() - before).count();
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before = std::chrono::steady_clock::now();
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field->VelocityStep(0.002, frametime);
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field->DensityStep(0.0005, frametime);
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}
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void Application::Render()
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{
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
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SDL_RenderClear(renderer);
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field->Draw(renderer, {0, 0, 1000, 1000});
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SDL_RenderPresent(renderer);
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}
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