use gltf;
use crate::vk::{Vec3, Vec4};
use crate::vk::Result;
use std::sync::Arc;
pub struct BoxModel {
vertices: Vec<Vec3>,
vertex_normals: Vec<[Vec4; 2]>,
indices: Vec<u32>,
}
impl BoxModel {
pub fn new() -> Result<Arc<Self>> {
let (file, buffers, _) = gltf::import("data/models/box.glb").unwrap();
let mesh = file.meshes()
.nth(0)
.unwrap();
let vertices = mesh.primitives()
.filter_map(|v| v.reader(|buffer| Some(&buffers[buffer.index()])).read_positions())
.flat_map(|v| v)
.map(|v| Vec3::new(v[0], v[1], v[2]))
.collect::<Vec<Vec3>>();
let normals = mesh.primitives()
.filter_map(|v| v.reader(|buffer| Some(&buffers[buffer.index()])).read_normals())
.flat_map(|v| v)
.map(|v| Vec3::new(v[0], v[1], v[2]))
.collect::<Vec<Vec3>>();
let vertex_normals = vertices.iter()
.zip(normals.iter())
.map(|(v, n)| {
let mut array = [Vec4::new(0.0, 0.0, 0.0, 0.0); 2];
array[0] = Vec4::new(v.x, v.y, v.z, 1.0);
array[1] = Vec4::new(n.x, n.y, n.z, 0.0);
array
})
.collect::<Vec<[Vec4; 2]>>();
let indices = mesh.primitives()
.filter_map(|v| v.reader(|buffer| Some(&buffers[buffer.index()])).read_indices())
.map(|v| v.into_u32())
.flat_map(|v| v)
.collect::<Vec<u32>>();
let model = Self {
vertices,
vertex_normals,
indices,
};
Ok(Arc::new(model))
}
pub fn vertices(&self) -> &Vec<Vec3> {
&self.vertices
}
pub fn vertex_normals(&self) -> &Vec<[Vec4; 2]> {
&self.vertex_normals
}
pub fn indices(&self) -> &Vec<u32> {
&self.indices
}
}