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feat: Refactor code structure and enhance functionality across multiple crates

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This commit is contained in:
Valentin Popov
2026-02-19 10:09:18 +00:00
parent efab61a45c
commit bb827c3928
15 changed files with 232 additions and 120 deletions
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49
crates/render-demo/src/main.rs
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@@ -221,12 +221,17 @@ fn run(args: Args) -> Result<(), String> {
)
})?;
let mesh = build_render_mesh(&loaded_model.model, args.lod, args.group);
if mesh.vertices.is_empty() {
if mesh.indices.is_empty() {
return Err(format!(
"model has no renderable triangles for lod={} group={}",
args.lod, args.group
));
}
if mesh.index_overflow {
eprintln!(
"warning: mesh exceeds u16 index space and may be partially rendered on GLES2 targets"
);
}
let Some((bounds_min, bounds_max)) = compute_bounds_for_mesh(&mesh.vertices) else {
return Err(String::from("failed to compute mesh bounds"));
};
@@ -304,6 +309,7 @@ fn run(args: Args) -> Result<(), String> {
vertex_data.push(vertex.uv0[1]);
}
let vertex_bytes = f32_slice_to_ne_bytes(&vertex_data);
let index_bytes = u16_slice_to_ne_bytes(&mesh.indices);
let gl = unsafe {
glow::Context::from_loader_function(|name| video.gl_get_proc_address(name) as *const _)
@@ -319,9 +325,13 @@ fn run(args: Args) -> Result<(), String> {
.ok_or_else(|| String::from("shader attribute a_uv is missing"))?;
let vbo = unsafe { gl.create_buffer().map_err(|e| e.to_string())? };
let ebo = unsafe { gl.create_buffer().map_err(|e| e.to_string())? };
unsafe {
gl.bind_buffer(glow::ARRAY_BUFFER, Some(vbo));
gl.buffer_data_u8_slice(glow::ARRAY_BUFFER, &vertex_bytes, glow::STATIC_DRAW);
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, Some(ebo));
gl.buffer_data_u8_slice(glow::ELEMENT_ARRAY_BUFFER, &index_bytes, glow::STATIC_DRAW);
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, None);
gl.bind_buffer(glow::ARRAY_BUFFER, None);
}
@@ -341,8 +351,9 @@ fn run(args: Args) -> Result<(), String> {
a_pos,
a_uv,
vbo,
ebo,
gpu_texture.as_ref(),
mesh.vertices.len(),
mesh.indices.len(),
&args,
center,
camera_distance,
@@ -360,8 +371,9 @@ fn run(args: Args) -> Result<(), String> {
a_pos,
a_uv,
vbo,
ebo,
gpu_texture.as_ref(),
mesh.vertices.len(),
mesh.indices.len(),
&args,
center,
camera_distance,
@@ -372,6 +384,7 @@ fn run(args: Args) -> Result<(), String> {
if let Some(texture) = gpu_texture {
gl.delete_texture(texture.handle);
}
gl.delete_buffer(ebo);
gl.delete_buffer(vbo);
gl.delete_program(program);
}
@@ -452,8 +465,9 @@ fn run_capture(
a_pos: u32,
a_uv: u32,
vbo: glow::NativeBuffer,
ebo: glow::NativeBuffer,
texture: Option<&GpuTexture>,
vertex_count: usize,
index_count: usize,
args: &Args,
center: [f32; 3],
camera_distance: f32,
@@ -478,8 +492,9 @@ fn run_capture(
a_pos,
a_uv,
vbo,
ebo,
texture,
vertex_count,
index_count,
args.width,
args.height,
&mvp,
@@ -504,8 +519,9 @@ fn run_interactive(
a_pos: u32,
a_uv: u32,
vbo: glow::NativeBuffer,
ebo: glow::NativeBuffer,
texture: Option<&GpuTexture>,
vertex_count: usize,
index_count: usize,
args: &Args,
center: [f32; 3],
camera_distance: f32,
@@ -543,8 +559,9 @@ fn run_interactive(
a_pos,
a_uv,
vbo,
ebo,
texture,
vertex_count,
index_count,
w,
h,
&mvp,
@@ -584,8 +601,9 @@ unsafe fn draw_frame(
a_pos: u32,
a_uv: u32,
vbo: glow::NativeBuffer,
ebo: glow::NativeBuffer,
texture: Option<&GpuTexture>,
vertex_count: usize,
index_count: usize,
width: u32,
height: u32,
mvp: &[f32; 16],
@@ -614,17 +632,20 @@ unsafe fn draw_frame(
}
gl.bind_buffer(glow::ARRAY_BUFFER, Some(vbo));
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, Some(ebo));
gl.enable_vertex_attrib_array(a_pos);
gl.vertex_attrib_pointer_f32(a_pos, 3, glow::FLOAT, false, 20, 0);
gl.enable_vertex_attrib_array(a_uv);
gl.vertex_attrib_pointer_f32(a_uv, 2, glow::FLOAT, false, 20, 12);
gl.draw_arrays(
gl.draw_elements(
glow::TRIANGLES,
index_count.min(i32::MAX as usize) as i32,
glow::UNSIGNED_SHORT,
0,
vertex_count.min(i32::MAX as usize) as i32,
);
gl.disable_vertex_attrib_array(a_uv);
gl.disable_vertex_attrib_array(a_pos);
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, None);
gl.bind_buffer(glow::ARRAY_BUFFER, None);
gl.bind_texture(glow::TEXTURE_2D, None);
gl.use_program(None);
@@ -758,6 +779,14 @@ fn f32_slice_to_ne_bytes(slice: &[f32]) -> Vec<u8> {
out
}
fn u16_slice_to_ne_bytes(slice: &[u16]) -> Vec<u8> {
let mut out = Vec::with_capacity(slice.len().saturating_mul(std::mem::size_of::<u16>()));
for &value in slice {
out.extend_from_slice(&value.to_ne_bytes());
}
out
}
fn mat4_identity() -> [f32; 16] {
[
1.0, 0.0, 0.0, 0.0, //