86 lines
No EOL
3 KiB
C++
86 lines
No EOL
3 KiB
C++
#include "camera/camera.h"
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#include "renderer/simplerenderer.h"
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#include "scene/scene.h"
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#include <iostream>
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#include <thread>
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#include <chrono>
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#include <iomanip>
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#include "post_processing/bloom.h"
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void SimpleRenderer::renderThread(const Scene *scene, Camera const *camera, Texture *image, int width, int widthStep, int widthOffset, int height, int heightStep, int heightOffset, std::atomic<int> *k, int const stepSize) {
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float const aspectRatio = static_cast<float>(height) / width;
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for (int y = heightOffset; y < height; y += heightStep) {
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for (int x = widthOffset; x < width; x += widthStep) {
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Ray ray = camera->createRay((static_cast<float>(x) / width * 2 - 1), -(static_cast<float>(y) / height * 2 - 1) * aspectRatio);
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image->setPixelAt(x, y, clamped(scene->traceRay(ray)));
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// Super hacky progress bar!
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if (++*k % stepSize == 0) {
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std::cout << "=" << std::flush;
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}
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}
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}
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}
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Texture SimpleRenderer::renderImage(Scene const &scene, Camera const &camera, int width, int height) {
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Texture image(width, height);
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// Setup timer
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std::chrono::steady_clock::time_point start, stop;
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// Reset Ray counting
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Ray::resetRayCount();
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// Super-hacky progress bar!
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std::cout << "(SimpleRenderer): Begin rendering..." << std::endl;
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std::cout << "| 0%";
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int const barSize = 50;
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int const stepSize = (width * height) / barSize;
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for (int i = 0; i < barSize - 3 - 5; ++i)
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std::cout << " ";
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std::cout << "100% |" << std::endl << "|";
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std::atomic<int> k(0);
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/* Start timer */ start = std::chrono::steady_clock::now();
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// Spawn a thread for every logical processor -1, calling the renderThread function
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int const nThreads = std::thread::hardware_concurrency();
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std::vector<std::thread> threads;
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for (int t = 0; t < nThreads - 1; ++t) {
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threads.emplace_back(renderThread, &scene, &camera, &image, width, nThreads, t, height, 1, 0, &k, stepSize);
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}
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// Call the renderThread function yourself
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renderThread(&scene, &camera, &image, width, nThreads, nThreads - 1, height, 1, 0, &k, stepSize);
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// Rejoin the threads
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for (int t = 0; t < nThreads - 1; ++t) {
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threads[t].join();
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}
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// Stop timer
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stop = std::chrono::steady_clock::now();
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std::cout << "| Done!" << std::endl;
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// Calculate the Time taken in seconds
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double seconds = std::chrono::duration_cast<std::chrono::duration<double>>(stop - start).count();
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std::cout << "Time: " << seconds << "s" << std::endl;
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// Get the number of seconds per ray
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int rays = Ray::getRayCount();
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std::cout << "Paths: " << rays << std::endl;
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std::cout << "Paths per second: " << std::fixed << std::setprecision(0) << rays / seconds << std::endl;
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// Post-processing
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// Bloom shader
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image.save("original.png");
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Bloom bloomEffect = Bloom(image.getImage());
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image.setTexture(bloomEffect.bloom(0.55f, 5, 10.0f, 0.06f));
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return image;
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} |