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extern crate byteorder; use byteorder::{LittleEndian, ReadBytesExt}; use std::io::*; #[derive(Debug)] pub struct Header { pub i: char, pub b: char, pub s: char, pub p: char, } fn read_header(cursor: &mut Cursor<Vec<u8>>) -> Result<Header> { let i = cursor.read_u8()? as char; let b = cursor.read_u8()? as char; let s = cursor.read_u8()? as char; let p = cursor.read_u8()? as char; Ok(Header { i: i, b: b, s: s, p: p, }) } fn read_version(cursor: &mut Cursor<Vec<u8>>) -> Result<i32> { cursor.read_i32::<LittleEndian>() } #[derive(Debug)] pub struct DirEntry { pub offset: i32, pub length: i32, } fn read_directories(cursor: &mut Cursor<Vec<u8>>) -> Result<Vec<DirEntry>> { let mut dir_entries = Vec::new(); for _ in 0..16 { let offset = cursor.read_i32::<LittleEndian>()?; let length = cursor.read_i32::<LittleEndian>()?; dir_entries.push(DirEntry { offset: offset, length: length, }); } Ok(dir_entries) } #[derive(Debug)] pub struct Entity { pub entities: String, } fn read_entities(cursor: &mut Cursor<Vec<u8>>, dir_entry: &DirEntry) -> Result<Entity> { let mut entities = Vec::with_capacity(dir_entry.length as usize); cursor.set_position(dir_entry.offset as u64); for _ in 0..dir_entry.length { let data = cursor.read_u8()?; entities.push(data); } let entities = String::from_utf8(entities).unwrap(); Ok(Entity { entities: entities }) } fn read_entry<F, T>(cursor: &mut Cursor<Vec<u8>>, dir_entry: &DirEntry, mut f: F) -> Result<Vec<T>> where F: FnMut(&mut Cursor<Vec<u8>>) -> Result<T> { let mut entries = Vec::new(); cursor.set_position(dir_entry.offset as u64); let end_pos = (dir_entry.offset + dir_entry.length) as u64; while cursor.position() < end_pos { let entry = f(cursor)?; entries.push(entry); } Ok(entries) } #[derive(Debug)] pub struct Texture { pub name: String, pub flags: i32, pub contents: i32, } fn read_texture(cursor: &mut Cursor<Vec<u8>>) -> Result<Texture> { let mut texture = Vec::new(); for _ in 0..64 { let data = cursor.read_u8()?; if data != 0u8 { texture.push(data); } } let texture_name = String::from_utf8(texture).unwrap(); let flags = cursor.read_i32::<LittleEndian>()?; let contents = cursor.read_i32::<LittleEndian>()?; Ok(Texture { name: texture_name, flags: flags, contents: contents, }) } #[derive(Debug)] pub struct Plane { pub normal: [f32; 3], pub dist: f32, } fn read_plane(cursor: &mut Cursor<Vec<u8>>) -> Result<Plane> { let x = cursor.read_f32::<LittleEndian>()?; let y = cursor.read_f32::<LittleEndian>()?; let z = cursor.read_f32::<LittleEndian>()?; let dist = cursor.read_f32::<LittleEndian>()?; let plane = Plane { normal: [x, y, z], dist: dist, }; Ok(plane) } #[derive(Debug)] pub struct Node { pub plane: i32, pub children: [i32; 2], pub mins: [i32; 3], pub maxs: [i32; 3], } fn read_node(cursor: &mut Cursor<Vec<u8>>) -> Result<Node> { let plane = cursor.read_i32::<LittleEndian>()?; let children = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let mins = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let maxs = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let node = Node { plane: plane, children: children, mins: mins, maxs: maxs, }; Ok(node) } #[derive(Debug)] pub struct Leaf { pub cluster: i32, pub area: i32, pub mins: [i32; 3], pub maxs: [i32; 3], pub leaf_face: i32, pub num_leaf_faces: i32, pub leaf_brush: i32, pub num_leaf_brushes: i32, } fn read_leaf(cursor: &mut Cursor<Vec<u8>>) -> Result<Leaf> { let cluster = cursor.read_i32::<LittleEndian>()?; let area = cursor.read_i32::<LittleEndian>()?; let mins = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let maxs = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let leaf_face = cursor.read_i32::<LittleEndian>()?; let num_leaf_faces = cursor.read_i32::<LittleEndian>()?; let leaf_brush = cursor.read_i32::<LittleEndian>()?; let num_leaf_brushes = cursor.read_i32::<LittleEndian>()?; let leaf = Leaf { cluster: cluster, area: area, mins: mins, maxs: maxs, leaf_face: leaf_face, num_leaf_faces: num_leaf_faces, leaf_brush: leaf_brush, num_leaf_brushes: num_leaf_brushes, }; Ok(leaf) } #[derive(Debug)] pub struct LeafFace { pub face: i32, } fn read_leaf_face(cursor: &mut Cursor<Vec<u8>>) -> Result<LeafFace> { let face = cursor.read_i32::<LittleEndian>()?; let leaf_face = LeafFace { face: face }; Ok(leaf_face) } #[derive(Debug)] pub struct LeafBrush { pub brush: i32, } fn read_leaf_brush(cursor: &mut Cursor<Vec<u8>>) -> Result<LeafBrush> { let brush = cursor.read_i32::<LittleEndian>()?; let leaf_brush = LeafBrush { brush: brush }; Ok(leaf_brush) } #[derive(Debug)] pub struct Model { pub mins: [f32; 3], pub maxs: [f32; 3], pub face: i32, pub num_faces: i32, pub brush: i32, pub num_brushes: i32, } fn read_model(cursor: &mut Cursor<Vec<u8>>) -> Result<Model> { let mins = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let maxs = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let face = cursor.read_i32::<LittleEndian>()?; let num_faces = cursor.read_i32::<LittleEndian>()?; let brush = cursor.read_i32::<LittleEndian>()?; let num_brushes = cursor.read_i32::<LittleEndian>()?; let model = Model { mins: mins, maxs: maxs, face: face, num_faces: num_faces, brush: brush, num_brushes: num_brushes, }; Ok(model) } #[derive(Debug)] pub struct Brush { pub brush_side: i32, pub num_brush_sides: i32, pub texture: i32, } fn read_brush(cursor: &mut Cursor<Vec<u8>>) -> Result<Brush> { let brush_side = cursor.read_i32::<LittleEndian>()?; let num_brush_sides = cursor.read_i32::<LittleEndian>()?; let texture = cursor.read_i32::<LittleEndian>()?; let brush = Brush { brush_side: brush_side, num_brush_sides: num_brush_sides, texture: texture, }; Ok(brush) } #[derive(Debug)] pub struct BrushSide { pub plane: i32, pub texture: i32, } fn read_brush_side(cursor: &mut Cursor<Vec<u8>>) -> Result<BrushSide> { let plane = cursor.read_i32::<LittleEndian>()?; let texture = cursor.read_i32::<LittleEndian>()?; let brush_side = BrushSide { plane: plane, texture: texture, }; Ok(brush_side) } #[derive(Debug)] pub struct Vertex { pub position: [f32; 3], pub tex_coord1: [f32; 2], pub tex_coord2: [f32; 2], pub normal: [f32; 3], pub color: [u8; 4], } fn read_vertex(cursor: &mut Cursor<Vec<u8>>) -> Result<Vertex> { let position = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let tex_coord1 = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let tex_coord2 = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let normal = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let color = [cursor.read_u8()?, cursor.read_u8()?, cursor.read_u8()?, cursor.read_u8()?]; let vertex = Vertex { position: position, tex_coord1: tex_coord1, tex_coord2: tex_coord2, normal: normal, color: color, }; Ok(vertex) } #[derive(Debug)] pub struct MeshVert { pub offset: i32, } fn read_mesh_vert(cursor: &mut Cursor<Vec<u8>>) -> Result<MeshVert> { let offset = cursor.read_i32::<LittleEndian>()?; let mesh_vert = MeshVert { offset: offset }; Ok(mesh_vert) } #[derive(Debug)] pub struct Effect { pub name: String, pub brush: i32, pub unk: i32, } fn read_effect(cursor: &mut Cursor<Vec<u8>>) -> Result<Effect> { let mut name = Vec::new(); for _ in 0..64 { let data = cursor.read_u8()?; if data != 0u8 { name.push(data); } } let name = String::from_utf8(name).unwrap(); let brush = cursor.read_i32::<LittleEndian>()?; let unk = cursor.read_i32::<LittleEndian>()?; Ok(Effect { name: name, brush: brush, unk: unk, }) } #[derive(Debug)] pub struct Face { pub texture: i32, pub effect: i32, pub face_type: i32, pub vertex: i32, pub num_vertexes: i32, pub mesh_vert: i32, pub num_mesh_verts: i32, pub lm_index: i32, pub lm_start: [i32; 2], pub lm_size: [i32; 2], pub lm_origin: [f32; 3], pub lm_vecs: [[f32; 3]; 2], pub normal: [f32; 3], pub size: [i32; 2], } fn read_face(cursor: &mut Cursor<Vec<u8>>) -> Result<Face> { let texture = cursor.read_i32::<LittleEndian>()?; let effect = cursor.read_i32::<LittleEndian>()?; let face_type = cursor.read_i32::<LittleEndian>()?; let vertex = cursor.read_i32::<LittleEndian>()?; let num_vertexes = cursor.read_i32::<LittleEndian>()?; let mesh_vert = cursor.read_i32::<LittleEndian>()?; let num_mesh_verts = cursor.read_i32::<LittleEndian>()?; let lm_index = cursor.read_i32::<LittleEndian>()?; let lm_start = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let lm_size = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let lm_origin = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let lm_vec1 = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let lm_vec2 = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let lm_vecs = [lm_vec1, lm_vec2]; let normal = [cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?, cursor.read_f32::<LittleEndian>()?]; let size = [cursor.read_i32::<LittleEndian>()?, cursor.read_i32::<LittleEndian>()?]; let face = Face { texture: texture, effect: effect, face_type: face_type, vertex: vertex, num_vertexes: num_vertexes, mesh_vert: mesh_vert, num_mesh_verts: num_mesh_verts, lm_index: lm_index, lm_start: lm_start, lm_size: lm_size, lm_origin: lm_origin, lm_vecs: lm_vecs, normal: normal, size: size, }; Ok(face) } #[derive(Debug)] pub struct BSP { pub header: Header, pub dir_entries: Vec<DirEntry>, pub entities: Entity, pub textures: Vec<Texture>, pub planes: Vec<Plane>, pub nodes: Vec<Node>, pub leafs: Vec<Leaf>, pub leaf_faces: Vec<LeafFace>, pub leaf_brushes: Vec<LeafBrush>, pub models: Vec<Model>, pub brushes: Vec<Brush>, pub brush_sides: Vec<BrushSide>, pub vertexes: Vec<Vertex>, pub mesh_verts: Vec<MeshVert>, pub effects: Vec<Effect>, pub faces: Vec<Face>, } pub fn read_bsp(bytes: Vec<u8>) -> Result<BSP> { let mut cursor = Cursor::new(bytes); let header = read_header(&mut cursor)?; let version = read_version(&mut cursor)?; assert_eq!(version, 0x2e); let dir_entries = read_directories(&mut cursor)?; let entities = read_entities(&mut cursor, &dir_entries[0])?; let textures = read_entry(&mut cursor, &dir_entries[1], read_texture)?; let planes = read_entry(&mut cursor, &dir_entries[2], read_plane)?; let nodes = read_entry(&mut cursor, &dir_entries[3], read_node)?; let leafs = read_entry(&mut cursor, &dir_entries[4], read_leaf)?; let leaf_faces = read_entry(&mut cursor, &dir_entries[5], read_leaf_face)?; let leaf_brushes = read_entry(&mut cursor, &dir_entries[6], read_leaf_brush)?; let models = read_entry(&mut cursor, &dir_entries[7], read_model)?; let brushes = read_entry(&mut cursor, &dir_entries[8], read_brush)?; let brush_sides = read_entry(&mut cursor, &dir_entries[9], read_brush_side)?; let vertexes = read_entry(&mut cursor, &dir_entries[10], read_vertex)?; let mesh_verts = read_entry(&mut cursor, &dir_entries[11], read_mesh_vert)?; let effects = read_entry(&mut cursor, &dir_entries[12], read_effect)?; let faces = read_entry(&mut cursor, &dir_entries[13], read_face)?; Ok({ BSP { header: header, dir_entries: dir_entries, entities: entities, textures: textures, planes: planes, nodes: nodes, leafs: leafs, leaf_faces: leaf_faces, leaf_brushes: leaf_brushes, models: models, brushes: brushes, brush_sides: brush_sides, vertexes: vertexes, mesh_verts: mesh_verts, effects: effects, faces: faces, } }) }