From 2e0d0e005063869ca742498c94c9545681a92463 Mon Sep 17 00:00:00 2001
From: IlyaShurupov <ilusha.main@gmail.com>
Date: Wed, 18 Oct 2023 13:45:47 +0300
Subject: [PATCH] Adding progress bar for rt application

---
 RayTracer/applications/Rayt.cpp | 28 +++++++++++++++++++++++++++-
 RayTracer/private/RayTracer.cpp |  6 ++++++
 RayTracer/public/RayTracer.hpp  |  4 ++++
 3 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/RayTracer/applications/Rayt.cpp b/RayTracer/applications/Rayt.cpp
index ea6b6cd..68313a6 100644
--- a/RayTracer/applications/Rayt.cpp
+++ b/RayTracer/applications/Rayt.cpp
@@ -37,6 +37,19 @@ void writeImage(const RayTracer::RenderBuffer& output) {
   }
 }
 
+static void* printStatus(void* arg) {
+  auto percentage = (const halnf*) arg;
+  auto old = *percentage;
+  while (*percentage < 0.99f) {
+    sleep(500);
+    if (old != *percentage && (*percentage - old) > 0.01) {
+      printf("Progress - %f\n", (*percentage) * 100);
+      old = *percentage;
+    }
+  }
+  pthread_exit(NULL);
+}
+
 void renderCommand(const String& scenePath) {
   Scene scene;
 
@@ -49,13 +62,26 @@ void renderCommand(const String& scenePath) {
 
   RayTracer rayt;
 
+  pthread_t my_thread;
+  int ret;
+
+  printf("\nStarting Render:\n\n");
+
+  ret = pthread_create(&my_thread, NULL, &printStatus, &rayt.mProgress.percentage);
+  if (ret != 0) {
+    printf("Error: pthread_create() failed\n");
+    exit(EXIT_FAILURE);
+  }
+
   auto start = get_time();
 
   rayt.render(scene, output, settings);
 
   auto end = get_time();
 
-  printf("\n Render finished with average render time per sample - %i (ms)\n", end - start);
+  pthread_join(my_thread, NULL);
+
+  printf("\nRender finished with average render time per sample - %i (ms)\n", end - start);
 
   writeImage(output);
 }
diff --git a/RayTracer/private/RayTracer.cpp b/RayTracer/private/RayTracer.cpp
index 09f598d..ff69a4b 100644
--- a/RayTracer/private/RayTracer.cpp
+++ b/RayTracer/private/RayTracer.cpp
@@ -149,6 +149,9 @@ void RayTracer::render(const Scene& scene, RayTracer::RenderBuffer& buff, const
   Vec3F deltaX = right * halnf(width / (alnf) buff.size().x);
   Vec3F deltaY = up * halnf(-height / (alnf) buff.size().y);
 
+  ualni maxIterations = buff.size().x * buff.size().y;
+  ualni currIter = 0;
+
   for (RayTracer::RenderBuffer::Index i = 0; i < buff.size().x; i++) {
     for (RayTracer::RenderBuffer::Index j = 0; j < buff.size().y; j++) {
       iterPoint = planeLeftTop + ((deltaX * (halnf) i) + (deltaY * (halnf) j));
@@ -167,6 +170,9 @@ void RayTracer::render(const Scene& scene, RayTracer::RenderBuffer& buff, const
       } else {
         buff.set({i, j}, 0.f);
       }
+
+      mProgress.percentage = (halnf) currIter / (halnf) maxIterations;
+      currIter++;
     }
   }
 }
diff --git a/RayTracer/public/RayTracer.hpp b/RayTracer/public/RayTracer.hpp
index 7c5afd2..998e386 100644
--- a/RayTracer/public/RayTracer.hpp
+++ b/RayTracer/public/RayTracer.hpp
@@ -41,6 +41,10 @@ namespace tp {
   public:
     typedef Buffer2D<RGBA> RenderBuffer;
 
+    struct Progress {
+      halnf percentage = 0.f;
+    } mProgress;
+    
     struct RenderSettings {
       uhalni depth = 2;
       uhalni spray = 1;