Rendering lto orb barely

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])
     }
 }