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/*
* Copyright (C) Oscar Shrimpton 2020
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
use std::convert::TryInto;
use super::Q3BspFile;
use crate::coords::CoordSystem;
use crate::helpers::{slice_to_u32, slice_to_vec3};
use crate::traits::vertices::*;
use crate::types::{ParseError, Result, Rgba};
/// The size of one vertex
const VERTEX_SIZE: usize = (4 * 3) + (2 * 2 * 4) + (4 * 3) + 4;
/// Parse a Vertices data from the data in a BSP file.
pub fn verts_from_data(data: &[u8]) -> Result<Box<[Vertex]>> {
if data.len() % VERTEX_SIZE != 0 {
return Err(ParseError::Invalid);
}
let length = data.len() / VERTEX_SIZE;
let mut vertices = Vec::with_capacity(length as usize);
for n in 0..length {
let offset = n * VERTEX_SIZE;
let vertex = &data[offset..offset + VERTEX_SIZE];
vertices.push(Vertex {
position: slice_to_vec3(&vertex[0..12]),
tex: TexCoord::from_bytes(&vertex[12..28].try_into().unwrap()),
normal: slice_to_vec3(&vertex[28..40]),
color: Rgba::from_slice(&vertex[40..44]),
})
}
Ok(vertices.into_boxed_slice())
}
/// Parse the given data as a list of MeshVerts.
pub fn meshverts_from_data(data: &[u8]) -> Result<Box<[MeshVert]>> {
if data.len() % 4 != 0 {
return Err(ParseError::Invalid);
}
let length = data.len() / 4;
let mut meshverts = Vec::with_capacity(length as usize);
for n in 0..length {
meshverts.push(slice_to_u32(&data[n * 4..(n + 1) * 4]))
}
Ok(meshverts.into_boxed_slice())
}
impl<T: CoordSystem> HasVertices<T> for Q3BspFile<T> {
type VerticesIter<'a> = std::slice::Iter<'a, Vertex>;
fn vertices_iter(&self) -> Self::VerticesIter<'_> {
self.vertices.iter()
}
fn get_vertex(&self, index: u32) -> &Vertex {
&self.vertices[index as usize]
}
}
impl<T: CoordSystem> HasMeshVerts<T> for Q3BspFile<T> {
type MeshVertsIter<'a> = std::slice::Iter<'a, MeshVert>;
fn meshverts_iter(&self) -> Self::MeshVertsIter<'_> {
self.meshverts.iter()
}
fn get_meshvert<'a>(&self, index: u32) -> MeshVert {
self.meshverts[index as usize]
}
}
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