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use std::borrow::Cow;
use std::collections::HashMap;
use ecs::Component;
use crate::asset::Handle as AssetHandle;
use crate::material::Material;
use crate::material::asset::Map as MaterialAssetMap;
use crate::mesh::Mesh;
pub mod asset;
#[derive(Debug, Clone, Component)]
#[non_exhaustive]
pub struct Model
{
pub spec_asset: AssetHandle<Spec>,
}
impl Model
{
pub fn new(asset_handle: AssetHandle<Spec>) -> Self
{
Self { spec_asset: asset_handle }
}
}
#[derive(Debug, Clone)]
#[non_exhaustive]
pub struct Spec
{
pub mesh_asset: Option<AssetHandle<Mesh>>,
pub materials: Materials,
pub material_names: Vec<Cow<'static, str>>,
}
impl Spec
{
pub fn builder() -> SpecBuilder
{
SpecBuilder::default()
}
}
#[derive(Debug, Default, Clone)]
pub struct SpecBuilder
{
mesh_asset: Option<AssetHandle<Mesh>>,
materials: Materials,
material_names: Vec<Cow<'static, str>>,
}
impl SpecBuilder
{
pub fn mesh(mut self, asset: AssetHandle<Mesh>) -> Self
{
self.mesh_asset = Some(asset);
self
}
pub fn materials(mut self, materials: Materials) -> Self
{
self.materials = materials;
self
}
pub fn material_name(mut self, material_name: impl Into<Cow<'static, str>>) -> Self
{
self.material_names.push(material_name.into());
self
}
pub fn material_names<MaterialName>(
mut self,
material_names: impl IntoIterator<Item = MaterialName>,
) -> Self
where
MaterialName: Into<Cow<'static, str>>,
{
self.material_names
.extend(material_names.into_iter().map(|mat_name| mat_name.into()));
self
}
#[tracing::instrument(skip_all)]
pub fn build(self) -> Spec
{
if !self.materials.is_empty() && self.material_names.is_empty() {
tracing::warn!("Model spec will have materials but no material names");
}
if self.materials.is_empty() && !self.material_names.is_empty() {
tracing::warn!("Model spec will have material names but no materials");
}
Spec {
mesh_asset: self.mesh_asset,
materials: self.materials,
material_names: self.material_names,
}
}
}
#[derive(Debug, Clone)]
pub enum Materials
{
Direct(HashMap<Cow<'static, str>, AssetHandle<Material>>),
Maps(Vec<AssetHandle<MaterialAssetMap>>),
}
impl Materials
{
pub fn direct<MaterialName>(
material_assets: impl IntoIterator<Item = (MaterialName, AssetHandle<Material>)>,
) -> Self
where
MaterialName: Into<Cow<'static, str>>,
{
Self::Direct(
material_assets
.into_iter()
.map(|(material_name, mat_asset)| (material_name.into(), mat_asset))
.collect(),
)
}
pub fn is_empty(&self) -> bool
{
match self {
Self::Direct(material_assets) => material_assets.is_empty(),
Self::Maps(material_asset_map_assets) => material_asset_map_assets.is_empty(),
}
}
pub fn len(&self) -> usize
{
match self {
Self::Direct(material_assets) => material_assets.len(),
Self::Maps(material_asset_map_assets) => material_asset_map_assets.len(),
}
}
}
impl Default for Materials
{
fn default() -> Self
{
Self::Maps(Vec::new())
}
}
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