From 3f225bde7ff4fcd3d1157d287521aca1365baa79 Mon Sep 17 00:00:00 2001
From: Jonathan Flueren <jonathan.flueren@tu-dortmund.de>
Date: Tue, 13 Sep 2022 23:30:17 +0200
Subject: [PATCH] Viking room first tries

---
 obj/viking_room.obj |  5 +----
 src/main.rs         | 54 +++++++++++++++++++++++++++++++--------------
 src/material.rs     |  4 ++--
 3 files changed, 40 insertions(+), 23 deletions(-)

diff --git a/obj/viking_room.obj b/obj/viking_room.obj
index 7cc74b1..5f99714 100644
--- a/obj/viking_room.obj
+++ b/obj/viking_room.obj
@@ -1,7 +1,4 @@
-# Blender v2.82 (sub 7) OBJ File: ''
-# www.blender.org
-mtllib viking_room.mtl
-o mesh_all1_Texture1_0
+
 v -0.573651 0.001530 0.713748
 v -0.573651 0.151382 -0.000154
 v -0.573651 0.164474 0.619081
diff --git a/src/main.rs b/src/main.rs
index 6f6eb77..3fa4450 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -67,17 +67,17 @@ fn main() {
 
     // Image
     let aspect_ratio = 10.0 / 7.5; //16.0 / 9.0;
-    let image_width = 400;
+    let image_width = 600;
     let image_height = (image_width as f64 / aspect_ratio) as u32;
-    let samples_per_pixel = 100_u32;
-    let max_depth = 50;
+    let samples_per_pixel = 1_u32;
+    let max_depth = 30;
     let antialiasing_threshold = 0.2; // at what diff between two colors will a pixel be antialiased
 
-    let vfov = 40.0;
-    let lookfrom = Point3::new(2.0, 0.8, 3.0);
-    let lookat = Point3::new(0.0, 0.0, 0.0);
+    let vfov = 43.0;
+    let lookfrom = Point3::new(2.0, 1.0, 1.0);
+    let lookat = Point3::new(0.0, 0.2, 0.0);
     let vup = Vec3::new(0.0, 1.0, 0.0);
-    let dist_to_focus = 3.0;
+    let dist_to_focus = 1.0;
     let aperture = 0.0; // disable depth of field
 
     // limit rayon multithreading thread count
@@ -88,7 +88,7 @@ fn main() {
 
     // World
     eprintln!("[1/4] Loading meshes from file...");
-    let world = from_obj("obj/suzanne.obj");
+    let world = from_obj("obj/viking_room.obj");
     // let world = random_world();
 
     // Camera
@@ -137,6 +137,26 @@ fn main() {
         .collect();
     bar.finish_and_clear();
 
+    // no antialiasing
+    if samples_per_pixel == 1_u32 {
+        eprintln!("[4/4] Exporting image to disk...");  
+        (0..image_height).into_iter().rev().for_each(|j| {
+            (0..image_width).into_iter().for_each(|i| {
+                color::put_color(
+                    &mut image,
+                    &color_lines[(image_height - j - 1) as usize][i as usize],
+                    i,
+                    image_height - j - 1,
+                    1,
+                );
+            })
+        });
+
+        image.save(default_file).unwrap();
+
+        return;
+    }
+
     eprintln!("[3/4] Antialiasing image...");
     let mut antialiasing: Vec<Vec<bool>> = Vec::new();
     let mut antialiasing_counter = 0;
@@ -262,13 +282,13 @@ fn from_obj(path: &str) -> HittableList {
     )));
     */
 
-    let material = Arc::new(Lambertian::new(&Color::new(
-        77.0 / 255.0,
-        77.0 / 255.0,
-        118.0 / 255.0,
-    )));
+    //let material = Arc::new(Lambertian::new(&Color::new(
+    //    77.0 / 255.0,
+    //    77.0 / 255.0,
+    //    118.0 / 255.0,
+    //)));
     //let material = Arc::new(Dielectric::new(2.0));
-    //let material = Arc::new(Metal::new(&Color::new(0.9, 0.9, 0.7), 1.0));
+    let material = Arc::new(Metal::new(&Color::new(0.7, 0.7, 0.8), 0.0));
     //let material = Arc::new(Rainbow::new());
 
     let cornell_box = tobj::load_obj(path, &tobj::OFFLINE_RENDERING_LOAD_OPTIONS);
@@ -337,18 +357,18 @@ fn from_obj(path: &str) -> HittableList {
             world.add(Box::<Triangle>::new(Triangle::new(
                 Point3::new(
                     mesh.positions[3 * index_a] as f64,
-                    mesh.positions[3 * index_a + 1] as f64,
                     mesh.positions[3 * index_a + 2] as f64,
+                    mesh.positions[3 * index_a + 1] as f64,
                 ),
                 Point3::new(
                     mesh.positions[3 * index_b] as f64,
-                    mesh.positions[3 * index_b + 1] as f64,
                     mesh.positions[3 * index_b + 2] as f64,
+                    mesh.positions[3 * index_b + 1] as f64,
                 ),
                 Point3::new(
                     mesh.positions[3 * index_c] as f64,
-                    mesh.positions[3 * index_c + 1] as f64,
                     mesh.positions[3 * index_c + 2] as f64,
+                    mesh.positions[3 * index_c + 1] as f64,
                 ),
                 normal_avg,
                 material.clone(),
diff --git a/src/material.rs b/src/material.rs
index 2b90b45..409e928 100644
--- a/src/material.rs
+++ b/src/material.rs
@@ -77,7 +77,7 @@ impl Material for Metal {
         *scattered = Ray::new(rec.p, reflected + self.fuzz * Vec3::random_in_unit_sphere());
         *attenuation = self.albedo.clone();
 
-        return Vec3::dot(scattered.direction(), rec.normal) > 0.0;
+        return true;//Vec3::dot(scattered.direction(), rec.normal) > 0.0;
     }
 }
 
@@ -97,7 +97,7 @@ impl Material for Mirror {
     ) -> bool {
         if utility::random_f64() > 0.8 {
             // Reflektiert
-            let reflected = Vec3::reflect(&Vec3::unit_vector(r_in.direction()), &rec.normal);
+            let reflected = Vec3::reflect(&r_in.direction(), &rec.normal);
             *scattered = Ray::new(rec.p, reflected);
             *attenuation = self.albedo.clone();