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// Copyright (C) 2019 Oscar Shrimpton
//
// This file is part of stockton-bsp.
//
// stockton-bsp is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// stockton-bsp is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with stockton-bsp. If not, see <http://www.gnu.org/licenses/>.
use crate::helpers::{slice_to_i32, slice_to_vec2i, slice_to_vec3};
use crate::types::{Result, ParseError};
use na::Vector3;
use crate::traits::faces::*;
use super::Q3BSPFile;
const FACE_SIZE: usize = (4 * 8) + (4 * 2) + (4 * 2) + (4 * 3) + ((4 * 2) * 3) + (4 * 3) + (4 * 2);
pub fn from_data(
data: &[u8],
n_textures: u32,
n_effects: u32,
n_vertices: u32,
n_meshverts: u32,
n_lightmaps: u32,
) -> Result<Box<[Face]>> {
if data.len() % FACE_SIZE != 0 {
return Err(ParseError::Invalid);
}
let length = data.len() / FACE_SIZE;
let mut faces = Vec::with_capacity(length);
for n in 0..length {
faces.push(face_from_slice(
&data[n * FACE_SIZE..(n + 1) * FACE_SIZE],
n_textures as usize,
n_effects as usize,
n_vertices as usize,
n_meshverts as usize,
n_lightmaps as usize,
)?);
}
Ok(faces.into_boxed_slice())
}
fn face_from_slice(
data: &[u8],
n_textures: usize,
n_effects: usize,
n_vertices: usize,
n_meshverts: usize,
n_lightmaps: usize,
) -> Result<Face> {
if data.len() != FACE_SIZE {
panic!("tried to call face.from_slice with invalid slice size");
}
// texture
let texture_idx = slice_to_i32(&data[0..4]) as usize;
if texture_idx >= n_textures {
return Err(ParseError::Invalid);
}
// effects
let effect_idx = slice_to_i32(&data[4..8]) as usize;
let effect_idx = if effect_idx < 0xffffffff {
if effect_idx >= n_effects {
return Err(ParseError::Invalid);
}
Some(effect_idx)
} else {
None
};
// face type
// TODO
let face_type: FaceType = unsafe { ::std::mem::transmute(slice_to_i32(&data[8..12])) };
// vertices
let vertex_offset = slice_to_i32(&data[12..16]) as usize;
let vertex_n = slice_to_i32(&data[16..20]) as usize;
if (vertex_offset + vertex_n) > n_vertices {
return Err(ParseError::Invalid);
}
let vertices_idx = vertex_offset..vertex_offset + vertex_n;
// meshverts
let meshverts_offset = slice_to_i32(&data[20..24]) as usize;
let meshverts_n = slice_to_i32(&data[24..28]) as usize;
if (meshverts_offset + meshverts_n) > n_meshverts {
return Err(ParseError::Invalid);
}
let meshverts_idx = meshverts_offset..meshverts_offset + meshverts_n;
// lightmap
let lightmap_idx = slice_to_i32(&data[28..32]) as usize;
let lightmap_idx = if lightmap_idx < 0xffffffff {
if lightmap_idx >= n_lightmaps {
return Err(ParseError::Invalid);
}
Some(lightmap_idx)
} else {
None
};
// map properties
let map_start = slice_to_vec2i(&data[32..40]);
let map_size = slice_to_vec2i(&data[40..48]);
let map_origin = slice_to_vec3(&data[48..60]);
// map_vecs
let mut map_vecs = [Vector3::new(0.0, 0.0, 0.0); 2];
for n in 0..2 {
let offset = 60 + (n * 3 * 4);
map_vecs[n] = slice_to_vec3(&data[offset..offset + 12]);
}
// normal & size
let normal = slice_to_vec3(&data[84..96]);
let size = slice_to_vec2i(&data[96..104]);
Ok(Face {
face_type,
texture_idx,
effect_idx,
vertices_idx,
meshverts_idx,
lightmap_idx,
map_start,
map_size,
map_origin,
map_vecs,
normal,
size,
})
}
impl<'a> HasFaces<'a> for Q3BSPFile {
type FacesIter = std::slice::Iter<'a, Face>;
fn faces_iter(&'a self) -> Self::FacesIter {
self.faces.iter()
}
fn get_face(&'a self, index: u32) -> &'a Face {
&self.faces[index as usize]
}
}
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