Switch to u32 indices by default

crates/bevy_gltf/src/loader.rs

@@ -5,10 +5,7 @@ use bevy_render::{
 
 use anyhow::Result;
 use bevy_asset::AssetLoader;
-use gltf::{
-    buffer::Source,
-    mesh::{util::ReadIndices, Mode},
-};
+use gltf::{buffer::Source, mesh::Mode};
 use std::{fs, io, path::Path};
 use thiserror::Error;
 
@@ -101,12 +98,8 @@ fn load_node(buffer_data: &[Vec<u8>], node: &gltf::Node, depth: i32) -> Result<M
             }
 
             if let Some(indices) = reader.read_indices() {
-                mesh.indices = match indices {
-                    ReadIndices::U8(iter) => Some(Indices::U16(iter.map(|i| i as u16).collect())),
-                    ReadIndices::U16(iter) => Some(Indices::U16(iter.collect())),
-                    ReadIndices::U32(iter) => Some(Indices::U32(iter.collect())),
-                }
-            };
+                mesh.indices = Some(Indices::U32(indices.into_u32().collect()));
+            }
 
             return Ok(mesh);
         }

crates/bevy_render/src/mesh/mesh.rs

@@ -237,7 +237,7 @@ pub mod shape {
                 uvs.push(*uv);
             }
 
-            let indices = Indices::U16(vec![
+            let indices = Indices::U32(vec![
                 0, 1, 2, 2, 3, 0, // top
                 4, 5, 6, 6, 7, 4, // bottom
                 8, 9, 10, 10, 11, 8, // right
@@ -333,7 +333,7 @@ pub mod shape {
                 ]
             };
 
-            let indices = Indices::U16(vec![0, 2, 1, 0, 3, 2]);
+            let indices = Indices::U32(vec![0, 2, 1, 0, 3, 2]);
 
             let mut positions = Vec::new();
             let mut normals = Vec::new();
@@ -373,7 +373,7 @@ pub mod shape {
                 ([-extent, 0.0, -extent], [0.0, 1.0, 0.0], [0.0, 1.0]),
             ];
 
-            let indices = Indices::U16(vec![0, 2, 1, 0, 3, 2]);
+            let indices = Indices::U32(vec![0, 2, 1, 0, 3, 2]);
 
             let mut positions = Vec::new();
             let mut normals = Vec::new();

crates/bevy_render/src/pipeline/pipeline.rs

@@ -55,7 +55,7 @@ impl PipelineDescriptor {
             shader_stages,
             rasterization_state: None,
             primitive_topology: PrimitiveTopology::TriangleList,
-            index_format: IndexFormat::Uint16,
+            index_format: IndexFormat::Uint32,
             sample_count: 1,
             sample_mask: !0,
             alpha_to_coverage_enabled: false,
@@ -67,7 +67,7 @@ impl PipelineDescriptor {
             name: None,
             primitive_topology: PrimitiveTopology::TriangleList,
             layout: None,
-            index_format: IndexFormat::Uint16,
+            index_format: IndexFormat::Uint32,
             sample_count: 1,
             sample_mask: !0,
             alpha_to_coverage_enabled: false,

crates/bevy_render/src/pipeline/pipeline_compiler.rs

@@ -27,7 +27,7 @@ impl Default for PipelineSpecialization {
             shader_specialization: Default::default(),
             primitive_topology: Default::default(),
             dynamic_bindings: Default::default(),
-            index_format: IndexFormat::Uint16,
+            index_format: IndexFormat::Uint32,
         }
     }
 }

crates/bevy_render/src/pipeline/render_pipelines.rs

@@ -88,7 +88,7 @@ pub fn draw_render_pipelines_system(
         let (index_range, index_format) = match mesh.indices.as_ref() {
             Some(Indices::U32(indices)) => (Some(0..indices.len() as u32), IndexFormat::Uint32),
             Some(Indices::U16(indices)) => (Some(0..indices.len() as u32), IndexFormat::Uint16),
-            None => (None, IndexFormat::Uint16),
+            None => (None, IndexFormat::Uint32),
         };
 
         let render_pipelines = &mut *render_pipelines;

crates/bevy_render/src/pipeline/state_descriptors.rs

@@ -190,6 +190,6 @@ pub enum IndexFormat {
 
 impl Default for IndexFormat {
     fn default() -> Self {
-        IndexFormat::Uint16
+        IndexFormat::Uint32
     }
 }