From 20db20d2702f7b547e1c9c0a2698b6d576cd79d8 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Thu, 9 Jan 2025 20:36:54 +0100
Subject: implement KHR_materials_dispersion

---
 world/src/mesh.rs | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

(limited to 'world/src')

diff --git a/world/src/mesh.rs b/world/src/mesh.rs
index a38980e..c5bbb7f 100644
--- a/world/src/mesh.rs
+++ b/world/src/mesh.rs
@@ -237,31 +237,31 @@ pub fn import_mesh(
 
         let g_albedo = if base_color[0] != 1. || base_color[1] != 1. || base_color[2] != 1. {
             info!(
-                "global albedo is r={},g={},b={}",
+                "albedo is r={},g={},b={}",
                 base_color[0], base_color[1], base_color[2]
             );
             Some(Vec3A::new(base_color[0], base_color[1], base_color[2]))
         } else {
-            debug!("global albedo pruned");
+            debug!("albedo pruned");
             None
         };
         let g_alpha = if base_color[3] != 1. {
-            info!("global alpha is {}", base_color[3]);
+            info!("alpha is {}", base_color[3]);
             Some(base_color[3])
         } else {
-            debug!("global alpha pruned");
+            debug!("alpha pruned");
             None
         };
 
         let emission = p.material().emissive_factor();
         let g_emission = if emission[0] != 0. || emission[1] != 0. || emission[2] != 0. {
             info!(
-                "global emission is r={},g={},b={}",
+                "emission is r={},g={},b={}",
                 base_color[0], base_color[1], base_color[2]
             );
             Some(Vec3A::new(emission[0], emission[1], emission[2]))
         } else {
-            debug!("global emission pruned");
+            debug!("emission pruned");
             None
         };
 
@@ -272,13 +272,27 @@ pub fn import_mesh(
             .unwrap_or(0.);
 
         let g_transmission = if transmission != 0. {
-            info!("global transmission is {transmission}");
+            info!("transmission is {transmission}");
             Some(transmission)
         } else {
-            debug!("global transmission pruned");
+            debug!("transmission pruned");
             None
         };
 
+        let g_dispersion = p
+            .material()
+            .extensions()
+            .map(|e| e.get("KHR_materials_dispersion"))
+            .flatten()
+            .map(|e| e.get("dispersion"))
+            .flatten()
+            .map(|e| e.as_f64())
+            .flatten()
+            .map(|e| e as f32);
+        if let Some(d) = g_dispersion {
+            info!("dispersion is {d}");
+        }
+
         let g_attenuation = p.material().volume().map(|v| {
             let ref_dist = v.attenuation_distance();
             Vec3A::from_array(v.attenuation_color().map(
@@ -300,6 +314,7 @@ pub fn import_mesh(
             g_attenuation,
             g_thickness,
             g_refractive_index,
+            g_dispersion,
             va_position,
             va_normal,
             va_texcoord,
@@ -313,8 +328,6 @@ pub fn import_mesh(
             tex_emission,
             tex_transmission,
             tex_thickness,
-            // not yet implemented
-            g_dispersion: None,
             // not supported by gltf
             va_transmission: None,
             va_emission: None,
-- 
cgit v1.2.3-70-g09d2