Jérôme Bousquié
67 lines
2.0 KiB
Rust
67 lines
2.0 KiB
Rust
//! # Example: File Import (OBJ)
|
|
//!
|
|
//! Demonstrates loading a Wavefront OBJ file with `wsg_lib::mesh::load_obj`.
|
|
//! Parses the file and prints geometry statistics.
|
|
//!
|
|
//! ## Build & Run
|
|
//! ```sh
|
|
//! cargo run -p wsg-lib --example import --features import-obj -- /path/to/model.obj
|
|
//! ```
|
|
//!
|
|
//! Without a file argument, parses a built-in sample triangle.
|
|
|
|
use wsg_lib::mesh::import::parse_obj;
|
|
use wsg_lib::mesh::load_obj;
|
|
|
|
fn main() {
|
|
let args: Vec<String> = std::env::args().collect();
|
|
|
|
let content = if args.len() > 1 {
|
|
let path = &args[1];
|
|
eprintln!("Loading: {path}");
|
|
match load_obj(path) {
|
|
Ok(geom) => {
|
|
print_stats(&geom);
|
|
return;
|
|
}
|
|
Err(e) => {
|
|
eprintln!("Error: {e}");
|
|
std::process::exit(1);
|
|
}
|
|
}
|
|
} else {
|
|
eprintln!("No file argument — parsing a built-in sample.");
|
|
eprintln!("Usage: import <model.obj>");
|
|
// Built-in sample: a simple triangle with UVs and normals
|
|
"v 0.0 0.0 0.0\nv 1.0 0.0 0.0\nv 0.5 1.0 0.0\nvn 0 0 1\nvt 0.0 0.0\nvt 1.0 0.0\nvt 0.5 1.0\nf 1/1/1 2/2/1 3/3/1\n"
|
|
};
|
|
|
|
let geom = parse_obj(content).expect("sample should parse");
|
|
print_stats(&geom);
|
|
}
|
|
|
|
fn print_stats(geom: &wsg_lib::Geometry) {
|
|
println!("\n=== Geometry Statistics ===");
|
|
println!(" Vertices: {}", geom.positions.len());
|
|
if let Some(n) = &geom.normals {
|
|
println!(" Normals: {}", n.len());
|
|
}
|
|
if let Some(uv) = &geom.uvs {
|
|
println!(" UVs: {}", uv.len());
|
|
}
|
|
if let Some(idx) = &geom.indices {
|
|
println!(" Indices: {} ({} triangles)", idx.len(), idx.len() / 3);
|
|
}
|
|
if let Err(e) = geom.validate() {
|
|
println!(" Validation FAILED: {e}");
|
|
} else {
|
|
println!(" Validation: OK");
|
|
}
|
|
// Bounding box
|
|
if let Some(bbox) = geom.bbox() {
|
|
println!(" BBox min: {:?}", bbox.min);
|
|
println!(" BBox max: {:?}", bbox.max);
|
|
}
|
|
println!();
|
|
}
|