fix

assignment-1c/examples/hw1c_grading_files/Test1.txt

@@ -0,0 +1,14 @@
+eye 0 0 0
+viewdir 0 0 -1
+updir 0 1 0
+hfov 60
+imsize 512 256
+bkgcolor 0.1 0.1 0.1
+light -2 1 0 1 1 1 1
+mtlcolor 0 1 0 1 1 1 0.2 0.6 0.2 20
+v 0 1 -4
+v -1 -1 -4
+v 1 -1 -4
+v 2 1 -6
+f 1 2 3
+f 1 3 4

assignment-1c/examples/hw1c_grading_files/Test2.txt

@@ -0,0 +1,18 @@
+eye 0 0 0
+viewdir 0 0 -1
+updir 0 1 0
+hfov 60
+imsize 512 256
+bkgcolor 0.1 0.1 0.1
+light -2 1 0 1 1 1 1
+mtlcolor 0 0 1 1 1 1 0.2 0.6 0.2 20
+v -1 1 -4
+v -1 -1 -4
+v 1 -1 -4
+v 1 1 -4
+vn -1 1 1
+vn -1 -1 1
+vn 1 -1 1
+vn 1 1 1
+f 1//1 2//2 3//3
+f 1//1 3//3 4//4

assignment-1c/examples/hw1c_grading_files/Test3.txt

@@ -0,0 +1,10 @@
+eye 2 -6 1
+viewdir -1 3 -0.5
+updir 0 0 1
+hfov 50
+imsize 512 512
+bkgcolor 0.5 0.7 0.9
+light 0 1 -1 0 1 1 1
+mtlcolor 0 1 0 1 1 1 0.2 0.8 0.1 20
+texture earthtexture.ppm
+sphere 0 0 0 2

assignment-1c/examples/hw1c_grading_files/Test4.txt

@@ -0,0 +1,19 @@
+eye 0 0 0
+viewdir 0 0 -1
+updir 0 1 0
+hfov 60
+imsize 512 256
+bkgcolor 0.1 0.1 0.1
+light -2 1 0 1 1 1 1
+mtlcolor 0 0 1 1 1 1 0.2 0.6 0.2 20
+texture umn.ppm
+v -1 1 -4
+v -1 -1 -4
+v 1 -1 -4
+v 1 1 -4
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+f 1/1 2/2 3/3
+f 1/1 3/3 4/4

assignment-1c/examples/hw1c_grading_files/Test5.txt

@@ -0,0 +1,25 @@
+eye 0 0 0
+viewdir 0 0 -1
+updir 0 1 0
+hfov 60
+imsize 512 256
+bkgcolor 0.1 0.1 0.1
+light -2 1 0 1 1 1 1
+mtlcolor 0 0 1 1 1 1 0.2 0.6 0.2 20
+texture umn.ppm
+v -1 1 -4
+v -1 -1 -4
+v 1 -1 -4
+v 1 1 -4
+vn -1 1 1
+vn -1 -1 1
+vn 1 -1 1
+vn 1 1 1
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+f 1/1/1 2/2/2 3/3/3
+f 1/1/1 3/3/3 4/4/4
+
+

assignment-1c/examples/hw1c_grading_files/Test6.txt

@@ -0,0 +1,56 @@
+eye 12.5 5 2.5
+viewdir -2 -0.5 2
+updir 0 1 0
+hfov 60
+imsize 900 600
+bkgcolor 0.5 0.7 0.9
+light 1 -1 1 0 1 1 1
+mtlcolor 0 1 0 1 1 1 0.2 0.8 0 20
+v 10 0 5
+v -10 0 5
+v -10 0 25
+v 10 0 25
+v 5 0 12.5
+v -5 0 12.5
+v -5 5 12.5
+v 5 5 12.5
+v 5 0 17.5
+v -5 0 17.5
+v -5 5 17.5
+v 5 5 17.5
+v 5 7.5 15
+v -5 7.5 15
+v 5 4.5 12
+v -5 4.5 12
+v 5 4.5 18
+v -5 4.5 18
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+vt 2 0
+vt 2 1
+vt 0.5 0
+vt 4 0
+vt 4 1
+texture grass.ppm
+f 1/2 2/3 3/4
+f 1/2 3/4 4/1
+texture wood.ppm
+f 5/2 6/6 7/5
+f 5/2 7/5 8/1
+f 9/2 11/5 10/6
+f 9/2 12/1 11/5
+f 6/2 10/3 11/4
+f 6/2 11/4 7/1
+f 5/3 12/1 9/2
+f 5/3 8/4 12/1
+f 7/2 11/3 14/7
+f 8/3 13/7 12/2
+texture redwood.ppm
+f 13/1 15/2 16/9
+f 13/1 16/9 14/8
+f 13/8 14/1 18/2
+f 13/8 18/2 17/9
+texture soccerball.ppm
+sphere -2.5 0.5 9 0.5

assignment-1c/examples/hw1c_grading_files/TestE.txt

@@ -0,0 +1,20 @@
+eye 0 0 0
+viewdir 0 0 -1
+updir 0 1 0
+hfov 60
+imsize 512 256
+bkgcolor 0.1 0.1 0.1
+light -2 1 0 1 1 1 1
+mtlcolor 1 1 1 1 1 1 0.2 0.6 0.2 20 1 0
+bump normalmap.ppm
+sphere -1.6 0 -4 0.5
+v -1 1 -4
+v -1 -1 -4
+v 1 -1 -4
+v 1 1 -4
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+f 1/1 2/2 3/3
+f 1/1 3/3 4/4

assignment-1c/examples/hw1c_grading_files/grading.sh

@@ -0,0 +1,2 @@
+#! /bin/sh
+PROGRAM_NAME="raytracer1c"; echo "-------- Running Test1.txt --------"; ./$PROGRAM_NAME Test1.txt; echo "-------- Running Test2.txt --------";./$PROGRAM_NAME Test2.txt; echo "-------- Running Test3.txt --------";./$PROGRAM_NAME Test3.txt; echo "-------- Running Test4.txt --------";./$PROGRAM_NAME Test4.txt; echo "-------- Running Test5.txt --------";./$PROGRAM_NAME Test5.txt; echo "-------- Running Test6.txt --------";./$PROGRAM_NAME Test6.txt; echo "-------- Running TestE.txt --------";./$PROGRAM_NAME TestE.txt; 

assignment-1c/src/main.rs

@@ -4,7 +4,7 @@ extern crate tracing;
 use std::fs::File;
 use std::path::PathBuf;
 
-use anyhow::Result;
+use anyhow::{Context, Result};
 use assignment_1c::image::Image;
 use assignment_1c::ray::Ray;
 use assignment_1c::scene::Scene;
@@ -112,9 +112,9 @@ fn main() -> Result<()> {
 
       Ok(match earliest_intersection {
         // Take the object's material color
-        Some((obj_idx, intersection_context, object)) => {
-          scene.compute_pixel_color(obj_idx, object, intersection_context)?
-        }
+        Some((obj_idx, intersection_context, object)) => scene
+          .compute_pixel_color(obj_idx, object, intersection_context)
+          .context("Could not compute pixel color.")?,
 
         // There was no intersection, so this should default to the scene's
         // background color

assignment-1c/src/scene/illumination.rs

@@ -43,7 +43,7 @@ impl Scene {
 
         let texture = match self.textures.get(texture_idx) {
           Some(v) => v,
-          None => bail!("Texture index not found."),
+          None => bail!("Texture index {texture_idx} not found."),
         };
 
         texture.pixel_at(u, v)

assignment-1c/src/scene/input_file.rs

@@ -4,7 +4,7 @@ use std::path::Path;
 
 use anyhow::{Context, Result};
 use itertools::Itertools;
-use nalgebra::Vector3;
+use nalgebra::{Vector2, Vector3};
 
 use crate::{
   image::{Color, Image},
@@ -13,7 +13,7 @@ use crate::{
     data::{Attenuation, Light, LightKind, Material},
     object::{Object, ObjectKind},
     sphere::Sphere,
-    texture::{Texture, NormalMap},
+    texture::Texture,
     triangle::Triangle,
     Scene,
   },
@@ -209,6 +209,9 @@ impl Scene {
         // vn nx ny nz
         "vn" => scene.vertex_normals.push(r!(Vector)),
 
+        // vt u v
+        "vt" => scene.texture_vertices.push(r!(Vector2<f64>)),
+
         // f v1 v2 v3
         // f v1//n1 v2//n2 v3//n3
         "f" => {
@@ -230,7 +233,7 @@ impl Scene {
           let textures = match textures.iter().filter(|o| o.is_some()).count() {
             0 => None,
             n if n == vs.len() => Some(textures.map(|o| o.unwrap())),
-            _ => bail!("Cannot mix and match having a normal index"),
+            _ => bail!("Cannot mix and match having a texture index"),
           };
 
           let triangle = Triangle {
@@ -256,7 +259,7 @@ impl Scene {
           texture_idx = Some(idx);
 
           let image = Image::from_file(path)?;
-          let texture = Texture::new(image);
+          let texture = Texture::new(image, false);
           scene.textures.push(texture);
         }
 
@@ -271,8 +274,8 @@ impl Scene {
           texture_idx = Some(idx);
 
           let image = Image::from_file(path)?;
-          let normal_map = NormalMap::new(image);
-          scene.normal_maps.push(normal_map);
+          let normal_map = Texture::new(image, true);
+          scene.textures.push(normal_map);
         }
 
         _ => bail!("Unknown keyword {keyword}"),
@@ -332,6 +335,25 @@ macro_rules! impl_construct {
 impl_construct!(f64);
 impl_construct!(usize);
 
+impl Construct for Vector2<f64> {
+  type Args = ();
+
+  fn construct<'a, I>(it: &mut I, _: Self::Args) -> Result<Self>
+  where
+    I: Iterator<Item = &'a str>,
+  {
+    let (x, y) = match it.next_tuple() {
+      Some(v) => v,
+      None => bail!("Expected 2 values"),
+    };
+
+    let x: f64 = x.parse()?;
+    let y: f64 = y.parse()?;
+
+    Ok(Vector2::new(x, y))
+  }
+}
+
 impl Construct for Vector3<f64> {
   type Args = ();
 

assignment-1c/src/scene/mod.rs

@@ -7,12 +7,14 @@ pub mod sphere;
 pub mod texture;
 pub mod triangle;
 
+use nalgebra::Vector2;
+
 use crate::image::Color;
 use crate::{Point, Point2, Vector};
 
 use self::data::{Attenuation, DepthCueing, Light, Material};
 use self::object::Object;
-use self::texture::{Texture, NormalMap};
+use self::texture::{Texture};
 
 #[derive(Debug, Default)]
 pub struct Scene {
@@ -40,7 +42,7 @@ pub struct Scene {
   pub textures: Vec<Texture>,
 
   /// List of normal maps (Extra credit)
-  pub normal_maps: Vec<NormalMap>,
+  pub normal_maps: Vec<Texture>,
 
   /// Coordinates into a texture image
   pub texture_vertices: Vec<Point2>,

assignment-1c/src/scene/texture.rs

@@ -4,17 +4,33 @@ use crate::{
 };
 
 #[derive(Debug)]
-pub struct Texture(Image);
+pub struct Texture {
+  image: Image,
+  is_normal_map: bool,
+}
 
 impl Texture {
-  pub fn new(image: Image) -> Self {
-    Self(image)
+  pub fn new(image: Image, is_normal_map: bool) -> Self {
+    Self {
+      image,
+      is_normal_map,
+    }
   }
 
   pub fn pixel_at_exact(&self, x: usize, y: usize) -> Color {
     // TODO: Debug asserts?
 
-    self.0.data[y * self.0.width + x]
+    let x = match x {
+      n if n < self.image.width => n,
+      _ => self.image.width - 1,
+    };
+
+    let y = match y {
+      n if n < self.image.height => n,
+      _ => self.image.height - 1,
+    };
+
+    self.image.data[y * self.image.width + x]
   }
 
   /// Returns a pixel at the given coordinate. For non-lattice coordinates,
@@ -24,8 +40,8 @@ impl Texture {
     debug_assert!(0.0 <= v && v <= 1.0, "u must be between 0 and 1");
 
     // Slide 121
-    let x = u * (self.0.width - 1) as f64;
-    let y = v * (self.0.height - 1) as f64;
+    let x = u * (self.image.width - 1) as f64;
+    let y = v * (self.image.height - 1) as f64;
 
     let i = x.floor();
     let j = y.floor();
@@ -42,23 +58,3 @@ impl Texture {
       + (alpha) * (beta) * self.pixel_at_exact(i + 1, j + 1)
   }
 }
-
-#[derive(Debug)]
-pub struct NormalMap(Image);
-
-impl NormalMap {
-  pub fn new(image: Image) -> Self {
-    Self(image)
-  }
-
-  pub fn normal_vector_at_exact(&self, x: usize, y: usize) -> Vector {
-    let vec = self.0.data[y * self.0.width + x];
-
-    // So, according to the instructions, this should actually be a value
-    // between -1 and 1. However, we're reading this in through an image.
-    // I'm just going to do the lazy thing here (which theoretically
-    // actually saves cycles) by only doing the transformation when loading
-    // out of the image
-    vec.map(|value| 2.0 * value / 255.0 - 1.0)
-  }
-}