Rendering lto orb barely

ray-tracing-pbrt-scene/src/lib.rs

@@ -248,12 +248,12 @@ fn parse_shape<R>(iter: &mut Tokenizer) -> Result<Statement<R>> {
         "loopsubdiv" => {
             let t = parse_dict!(iter =>
                 levels, u32, 3;
-                indices, Vec<usize>, Vec::new();
+                indices, Vec<[usize;3]>, Vec::new();
                 p, Vec<Pos3>, Vec::new();
                 alpha, ShapeAlpha, ShapeAlpha::None
                 =>
                 levels, "integer levels", iter.parse_parameter()?;
-                indices, "integer indices", iter.parse_list()?;
+                indices, "integer indices", iter.parse_list_3(|a, b, c|[a, b, c])?;
                 p, "point3 P", iter.parse_list_3(Pos3::new)?;
                 alpha, "float alpha", ShapeAlpha::Value(iter.parse_parameter()?);
                 alpha, "texture alpha", ShapeAlpha::Texture(iter.parse_parameter()?)
@@ -263,16 +263,26 @@ fn parse_shape<R>(iter: &mut Tokenizer) -> Result<Statement<R>> {
                 bail!("indices are a required field")
             }
 
-            if t.p.is_empty() {
-                bail!("p is a required field")
+            if t.p.len() < 3 {
+                bail!("at least 3 vertices required")
             }
 
+            eprintln!(
+                "WARNING: loopsubdiv is bodged. No subdivisions. levels: {}",
+                t.levels
+            );
+
             Ok(Statement::Shape(
-                ShapeType::LoopSubDiv {
-                    levels: t.levels,
+                ShapeType::TriangleMesh(Bvh::new(
+                    TriangleMesh {
                         indices: t.indices,
                         p: t.p,
+                        n: Vec::new(),
+                        s: Vec::new(),
+                        uv: Vec::new(),
                     },
+                    8,
+                )),
                 t.alpha,
             ))
         }

ray-tracing-pbrt-scene/src/material.rs

@@ -70,13 +70,17 @@ struct PbrtCoatedDiffuseMaterial {
 impl<R: Rng> PbrtMaterial<R> for PbrtCoatedDiffuseMaterial {
     fn eval(&self, u: Float, v: Float, w_in: Dir3, w_out: Dir3, rng: &mut R) -> Color {
         let _ = rng;
-        let _ = w_out;
         let _ = w_in;
-        let _ = u;
-        let _ = v;
+        if w_out.y() >= 0.0 {
+            match &self.reflectance {
+                Either::A(v) => *v,
+                Either::B(t) => t.get(u, v),
+            }
+        } else {
             Color::black()
         }
     }
+}
 
 #[derive(Debug)]
 #[allow(dead_code)]
@@ -202,7 +206,9 @@ pub fn parse_material<R: Rng>(
                 "texture reflectance", Either::B(parse_2d_spectrum_texture(input, context)?)
             ]
         ))),
-        "coateddiffuse" => Ok(Arc::new(parse_dict2!(input, PbrtCoatedDiffuseMaterial;
+        "coateddiffuse" => Ok({
+            eprintln!("WARNING: coateddiffuse has no coating");
+            Arc::new(parse_dict2!(input, PbrtCoatedDiffuseMaterial;
                 albedo, Either::A(Color::black()), [
                     "rgb albedo", Either::A(texture::parse_rgb(input)?);
                     "spectrum albedo", Either::A(texture::parse_spectrum(input)?);
@@ -245,7 +251,8 @@ pub fn parse_material<R: Rng>(
                          }
                     }
                 ]
-        ))),
+            ))
+        }),
         "dielectric" => Ok(Arc::new(parse_dict2!(input, PbrtDielectricMaterial;
             eta, Either::A(Either::A(1.5)), [
                 "float eta", Either::A(Either::A(input.parse_parameter()?));

ray-tracing-pbrt-scene/src/shape.rs

@@ -159,11 +159,6 @@ pub(crate) enum ShapeType {
         n: Vec<Dir3>,
         uv: Vec<[Float; 2]>,
     },
-    LoopSubDiv {
-        levels: u32,
-        indices: Vec<usize>,
-        p: Vec<Pos3>,
-    },
     Disk {
         height: Float,
         radius: Float,

ray-tracing-pbrt-scene/src/texture/imagemap.rs

@@ -121,8 +121,29 @@ impl Pbrt2dSpectrumTexture for SpectrumImageMapTexture {
 
         let (w, h) = self.image.dimensions();
 
-        dbg!(u, v, w, h);
-        todo!()
+        let (u, v) = match self.wrap {
+            ImageMapWrap::Repeat => (
+                if u < 0.0 { 1.0 + u.fract() } else { u.fract() },
+                if v < 0.0 { 1.0 + v.fract() } else { v.fract() },
+            ),
+            ImageMapWrap::Black => {
+                if !(0.0..=1.0).contains(&u) || !(0.0..=1.0).contains(&v) {
+                    return Color::black();
+                }
+
+                (u, v)
+            }
+            ImageMapWrap::Clamp => (u.clamp(0.0, 1.0), v.clamp(0.0, 1.0)),
+        };
+
+        let x = u * w as Float;
+        let y = v * h as Float;
+
+        let c = self
+            .image
+            .get_pixel((x as u32).clamp(0, w - 1), (y as u32).clamp(0, h - 1));
+
+        Color::new(c.0[0], c.0[1], c.0[2])
     }
 }