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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| //! PLY utilities | ||
| use alloc::string::String; | ||
| use nalgebra::Rotation3; | ||
| use ply_rs::{ | ||
| parser::Parser, | ||
| ply::{self, Property}, | ||
| }; | ||
|
|
||
| use crate::{ | ||
| aabb::AABB, | ||
| bvh::build::utils::vec_bounding_box, | ||
| hitable::Hitable, | ||
| materials::{Material, MaterialInit, SharedMaterial}, | ||
| objects::Triangle, | ||
| Float, Position, Vec3, | ||
| }; | ||
|
|
||
| /// Internal PLY object representation after initialization. Contains the material for all triangles in it to avoid having n copies. | ||
| #[derive(Debug, Clone)] | ||
| pub struct PLY<'scene> { | ||
| /// Primitives of the `PLY` object, a list of `Triangle`s. | ||
| pub hitables: Vec<Hitable<'scene>>, | ||
| /// Material for the object | ||
| pub material: &'scene Material, | ||
| /// Axis-aligned bounding box of the object | ||
| pub aabb: AABB, | ||
| } | ||
|
|
||
| /// PLY structure. This gets converted into an internal representation using [Triangles](crate::objects::Triangle) | ||
| #[derive(Clone, Debug)] | ||
| #[cfg_attr(feature = "serde-derive", derive(serde::Serialize, serde::Deserialize))] | ||
| pub struct PLYInit { | ||
| /// Used for multiple importance sampling | ||
| #[cfg_attr(feature = "serde-derive", serde(default))] | ||
| pub priority: bool, | ||
| /// Path of the .ply file | ||
| pub path: String, | ||
| /// Material to use for the .ply object | ||
| #[cfg_attr(feature = "serde-derive", serde(default))] | ||
| pub material: MaterialInit, | ||
| /// Scaling factor for the object | ||
| pub scale: Float, | ||
| /// Location of the object in the rendered scene | ||
| pub center: Position, | ||
| /// Rotation of the object. Described as three angles, `roll`, `pitch`, `yaw`, applied in that order. | ||
| pub rotation: Vec3, | ||
| } | ||
|
|
||
| #[must_use] | ||
| /// Initializes a PLY | ||
| pub fn initialize_ply<'scene>( | ||
| ply_init: PLYInit, | ||
| materials: &'scene [SharedMaterial], | ||
| ) -> PLY<'scene> { | ||
| let material: &Material = match ply_init.material { | ||
| MaterialInit::Shared(name) => &materials.iter().find(|m| m.name == name).unwrap().material, | ||
| MaterialInit::Owned(m) => { | ||
| // TODO: do not leak memory | ||
| let material: &'scene Material = Box::leak(Box::new(m)); | ||
| material | ||
| } | ||
| }; | ||
| let mut hitables = Vec::new(); | ||
|
|
||
| // TODO: error handling! | ||
| let mut f = std::fs::File::open(ply_init.path).unwrap(); | ||
| let parser = Parser::<ply::DefaultElement>::new(); | ||
| let ply = parser.read_ply(&mut f); | ||
| let ply = ply.unwrap(); | ||
|
|
||
| let mut vertices = Vec::new(); | ||
| for vertex in &ply.payload["vertex"] { | ||
| let x = property_to_float(&vertex["x"]); | ||
| let y = property_to_float(&vertex["y"]); | ||
| let z = property_to_float(&vertex["z"]); | ||
| vertices.push(Vec3::new(x, y, z)); | ||
| } | ||
|
|
||
| for face in &ply.payload["face"] { | ||
| let indices = property_to_vec_u32(&face["vertex_indices"]); | ||
|
|
||
| let a = vertices[indices[0]]; | ||
| let b = vertices[indices[1]]; | ||
| let c = vertices[indices[2]]; | ||
|
|
||
| let a: Vec3 = Vec3::new(a[0], a[1], a[2]); | ||
| let b: Vec3 = Vec3::new(b[0], b[1], b[2]); | ||
| let c: Vec3 = Vec3::new(c[0], c[1], c[2]); | ||
| // Handle rotation | ||
| let rotation = Rotation3::from_euler_angles( | ||
| ply_init.rotation[0].to_radians(), | ||
| ply_init.rotation[1].to_radians(), | ||
| ply_init.rotation[2].to_radians(), | ||
| ); | ||
| let a: Vec3 = rotation * a; | ||
| let b: Vec3 = rotation * b; | ||
| let c: Vec3 = rotation * c; | ||
| // Handle scaling and offset | ||
| let a: Vec3 = a * ply_init.scale + ply_init.center; | ||
| let b: Vec3 = b * ply_init.scale + ply_init.center; | ||
| let c: Vec3 = c * ply_init.scale + ply_init.center; | ||
|
|
||
| let triangle = Triangle::from_coordinates(a, b, c, material); | ||
| hitables.push(Hitable::Triangle(triangle)); | ||
| } | ||
| // TODO: remove unwrap | ||
| let aabb = vec_bounding_box(&hitables).unwrap(); | ||
|
|
||
| PLY { | ||
| hitables, | ||
| material, | ||
| aabb, | ||
| } | ||
| } | ||
|
|
||
| // TODO: better ergonomics? | ||
| #[allow(trivial_numeric_casts)] | ||
| #[allow(clippy::cast_precision_loss)] | ||
| #[allow(clippy::cast_possible_truncation)] | ||
| fn property_to_float(p: &Property) -> Float { | ||
| match *p { | ||
| Property::Int(i) => i as Float, | ||
| Property::UInt(u) => u as Float, | ||
| Property::Float(f) => f as Float, | ||
| Property::Double(f) => f as Float, | ||
| // Unsupported | ||
| Property::Char(_) | ||
| | Property::UChar(_) | ||
| | Property::Short(_) | ||
| | Property::UShort(_) | ||
| | Property::ListChar(_) | ||
| | Property::ListUChar(_) | ||
| | Property::ListShort(_) | ||
| | Property::ListUShort(_) | ||
| | Property::ListInt(_) | ||
| | Property::ListUInt(_) | ||
| | Property::ListFloat(_) | ||
| | Property::ListDouble(_) => unimplemented!("PLY: unsupported property format {p:?}"), | ||
| } | ||
| } | ||
|
|
||
| // TODO: better ergonomics? | ||
| #[allow(trivial_numeric_casts)] | ||
| fn property_to_vec_u32(p: &Property) -> Vec<usize> { | ||
| match p { | ||
| Property::Char(_) | ||
| | Property::UChar(_) | ||
| | Property::Short(_) | ||
| | Property::UShort(_) | ||
| | Property::Int(_) | ||
| | Property::UInt(_) | ||
| | Property::Float(_) | ||
| | Property::Double(_) | ||
| | Property::ListChar(_) | ||
| | Property::ListFloat(_) | ||
| | Property::ListDouble(_) => unimplemented!("PLY: unsupported property format {p:?}"), | ||
| // | ||
| Property::ListUChar(vec_u) => vec_u.iter().map(|&u| u.into()).collect(), | ||
| Property::ListUShort(vec_u) => vec_u.iter().map(|&u| u.into()).collect(), | ||
| Property::ListUInt(vec_u) => vec_u.iter().map(|&u| u as usize).collect(), | ||
| // | ||
| Property::ListShort(vec_i) => vec_i.iter().map(|&i| i.unsigned_abs().into()).collect(), | ||
| Property::ListInt(vec_i) => vec_i.iter().map(|&i| i.unsigned_abs() as usize).collect(), | ||
| } | ||
| } |