From f8a2520388c504d7c48c04f23dca3031a8dc8d94 Mon Sep 17 00:00:00 2001
From: Jakub Stasiak <jakub@stasiak.at>
Date: Wed, 10 Jul 2019 18:01:53 +0200
Subject: [PATCH] Print progress to stderr

---
 output.png | Bin 84618 -> 84618 bytes
 src/lib.rs |   9 +++++++++
 2 files changed, 9 insertions(+)

diff --git a/output.png b/output.png
index 1793ca157ffa0f0a171b6dc0862525fd06e67ba1..fa7aaf7d87ae7a74e4072012c55e7a5cad7c54ae 100644
GIT binary patch
delta 64
zcmeC0%Gx!RwP6dRjhCRAm4Ts^iJ7*6ft7)Qj)ig1bYCw<1z8l~*wpTK3_#%N>gTe~
HDWM4fBwG;6

delta 64
zcmeC0%Gx!RwP6dRjhCRQm5GU!v4ysQft7*5+#gfrru%v^D#)S;zgeoghye&ZUHx3v
IIVCg!0A8aKT>t<8

diff --git a/src/lib.rs b/src/lib.rs
index ba6731a..03af09d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -351,6 +351,9 @@ pub fn render(
     bounces: usize,
 ) -> Image {
     let mut image = Image::new(width, height);
+    let pixels_total = width * height;
+    let mut pixels_done = 0;
+    let mut percent = 0;
     for i in 0..width {
         for j in 0..height {
             // -1s here because we want to provide x and y coordinates between 0 and 1 inclusive
@@ -360,6 +363,12 @@ pub fn render(
             );
             let color = trace_ray(&spheres, &ray, bounces);
             image.set_color(i, j, color);
+            pixels_done += 1;
+            let new_percent = pixels_done * 100 / pixels_total;
+            if new_percent != percent {
+                eprintln!("{}% done...", new_percent);
+                percent = new_percent;
+            }
         }
     }
     image