From d06d07217f68f12daea50be1b9df0965233da201 Mon Sep 17 00:00:00 2001
From: vonhyou <moi@rfung.dev>
Date: Mon, 19 Feb 2024 01:15:30 -0500
Subject: [PATCH] use save ppm

---
 src/RayTracer.cc | 14 ++------------
 src/RayTracer.h  |  2 +-
 2 files changed, 3 insertions(+), 13 deletions(-)

diff --git a/src/RayTracer.cc b/src/RayTracer.cc
index b6d91af..dcbce9d 100644
--- a/src/RayTracer.cc
+++ b/src/RayTracer.cc
@@ -20,7 +20,7 @@ void RayTracer::parse() {
 void RayTracer::render(Scene *scene) {
   int width = scene->getWidth();
   int height = scene->getHeight();
-  Buffer buffer(width * height);
+  Buffer buffer(width * height * 3);
   Task *task = new Task(scene, buffer);
   tasks.push_back(task);
 }
@@ -30,17 +30,7 @@ void RayTracer::output(Task *task) {
   int width = task->first->getWidth();
   int height = task->first->getHeight();
 
-  std::ofstream fout(path, std::ios_base::out | std::ios_base::binary);
-  fout << "P6" << std::endl
-       << width << ' ' << height << std::endl
-       << "255" << std::endl;
-
-  Buffer buffer = task->second;
-  for (int i = 0; i < height; ++i)
-    for (int j = 0; j < width; ++j)
-      fout << 255.0 * buffer[i * width + j].transpose() << ' ';
-
-  fout.close();
+  save_ppm(path, task->second, width, height);
 }
 
 void RayTracer::run() {
diff --git a/src/RayTracer.h b/src/RayTracer.h
index 1ac2649..95c917c 100644
--- a/src/RayTracer.h
+++ b/src/RayTracer.h
@@ -9,7 +9,7 @@
 #include <utility>
 #include <vector>
 
-using Buffer = std::vector<Eigen::Vector3f>;
+using Buffer = std::vector<double>;
 using Task = std::pair<Scene *, Buffer>;
 
 class RayTracer {