From 438aaebcbc5c963d378d297bfb13e2af24b12084 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Sat, 18 Jul 2026 15:19:07 +0400
Subject: feat(render): support full-scene 32-bit indices

---
 adapters/fparkan-render-vulkan/src/ffi/resources.rs   |  2 +-
 adapters/fparkan-render-vulkan/src/ffi/smoke.rs       |  2 +-
 adapters/fparkan-render-vulkan/src/ffi/smoke_types.rs | 12 ++++++------
 3 files changed, 8 insertions(+), 8 deletions(-)

(limited to 'adapters/fparkan-render-vulkan/src/ffi')

diff --git a/adapters/fparkan-render-vulkan/src/ffi/resources.rs b/adapters/fparkan-render-vulkan/src/ffi/resources.rs
index b7e84bd..1d38503 100644
--- a/adapters/fparkan-render-vulkan/src/ffi/resources.rs
+++ b/adapters/fparkan-render-vulkan/src/ffi/resources.rs
@@ -236,7 +236,7 @@ pub(super) fn create_static_mesh_index_buffer(
     device: &VulkanLogicalDeviceProbe,
     mesh: &VulkanStaticMesh,
 ) -> Result<VulkanAllocatedBuffer, VulkanSmokeRendererError> {
-    let mut bytes = Vec::with_capacity(mesh.indices.len() * std::mem::size_of::<u16>());
+    let mut bytes = Vec::with_capacity(mesh.indices.len() * std::mem::size_of::<u32>());
     for &index in &mesh.indices {
         bytes.extend_from_slice(&index.to_ne_bytes());
     }
diff --git a/adapters/fparkan-render-vulkan/src/ffi/smoke.rs b/adapters/fparkan-render-vulkan/src/ffi/smoke.rs
index 63066b4..f7c72b6 100644
--- a/adapters/fparkan-render-vulkan/src/ffi/smoke.rs
+++ b/adapters/fparkan-render-vulkan/src/ffi/smoke.rs
@@ -701,7 +701,7 @@ impl VulkanSmokeRenderer {
                 command_buffer,
                 self.index_buffer_ref()?.buffer,
                 0,
-                vk::IndexType::UINT16,
+                vk::IndexType::UINT32,
             );
             let clip_from_world = matrix_bytes(self.camera.clip_from_world);
             device.device().cmd_push_constants(
diff --git a/adapters/fparkan-render-vulkan/src/ffi/smoke_types.rs b/adapters/fparkan-render-vulkan/src/ffi/smoke_types.rs
index 47cab7d..2ca517b 100644
--- a/adapters/fparkan-render-vulkan/src/ffi/smoke_types.rs
+++ b/adapters/fparkan-render-vulkan/src/ffi/smoke_types.rs
@@ -126,7 +126,7 @@ pub struct VulkanStaticMesh {
     /// Vertex data in pipeline order.
     pub vertices: Vec<VulkanStaticVertex>,
     /// Triangle-list indices into [`Self::vertices`].
-    pub indices: Vec<u16>,
+    pub indices: Vec<u32>,
     /// Source-preserving triangle draw ranges in [`Self::indices`].
     pub draw_ranges: Vec<VulkanStaticDrawRange>,
 }
@@ -296,11 +296,11 @@ impl VulkanStaticMesh {
         if usize::try_from(expected_first).ok() != Some(self.indices.len()) {
             return Err("static mesh draw ranges must cover all indices");
         }
-        if self
-            .indices
-            .iter()
-            .any(|&index| usize::from(index) >= self.vertices.len())
-        {
+        if self.indices.iter().any(|&index| {
+            usize::try_from(index)
+                .ok()
+                .is_none_or(|index| index >= self.vertices.len())
+        }) {
             return Err("static mesh index exceeds vertex count");
         }
         Ok(())
-- 
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