Linedef Loading

Added the ability to load linedefs from a wad file. Also added
functions to the linedef type to allow you to check the status of
each bit of the flags value making it very easy to check linedef
properties.

src/doomlevel.rs

@@ -1,3 +1,4 @@
+mod linedef;
 mod vertex;
 
 use std::{
@@ -5,6 +6,8 @@ use std::{
     io::{Read, Seek, SeekFrom},
 };
 
+use self::linedef::Linedef;
+
 use super::wadfile::WADFile;
 use vertex::Vertex;
 
@@ -19,12 +22,12 @@ enum Lumps {
     SECTORS,
     REJECT,
     BLOCKMAP,
-    BEHAVIOR,
 }
 
 pub struct DoomLevel {
     pub name: String,
     pub vertexes: Vec<Vertex>,
+    pub linedefs: Vec<Linedef>,
 }
 
 impl DoomLevel {
@@ -36,6 +39,11 @@ impl DoomLevel {
                 wad_file.get_lump_offset(lvl_index + Lumps::VERTEXES as u32),
                 wad_file.get_lump_size(lvl_index + Lumps::VERTEXES as u32),
             ),
+            linedefs: load_linedefs(
+                wad_file,
+                wad_file.get_lump_offset(lvl_index + Lumps::LINEDEFS as u32),
+                wad_file.get_lump_size(lvl_index + Lumps::LINEDEFS as u32),
+            ),
         }
     }
 }
@@ -63,3 +71,42 @@ fn load_vertexes(wad_file: &WADFile, offset: u32, size: u32) -> Vec<Vertex> {
 
     vertex_list
 }
+
+fn load_linedefs(wad_file: &WADFile, offset: u32, size: u32) -> Vec<Linedef> {
+    let num_linedef: u32 = size / 14u32;
+
+    let mut linedef_list: Vec<Linedef> = Vec::with_capacity(num_linedef as usize);
+
+    let mut linedef_data = File::open(&wad_file.wad_path).unwrap();
+    linedef_data.seek(SeekFrom::Start(offset as u64)).unwrap();
+
+    for _ in 0..num_linedef {
+        let mut start_vertex = [0; 2];
+        let mut end_vertex = [0; 2];
+        let mut flags = [0; 2];
+        let mut special_type = [0; 2];
+        let mut sector_tag = [0; 2];
+        let mut front_sidedef = [0; 2];
+        let mut back_sidedef = [0; 2];
+
+        linedef_data.read(&mut start_vertex).unwrap();
+        linedef_data.read(&mut end_vertex).unwrap();
+        linedef_data.read(&mut flags).unwrap();
+        linedef_data.read(&mut special_type).unwrap();
+        linedef_data.read(&mut sector_tag).unwrap();
+        linedef_data.read(&mut front_sidedef).unwrap();
+        linedef_data.read(&mut back_sidedef).unwrap();
+
+        linedef_list.push(Linedef {
+            start_vertex: i16::from_le_bytes(start_vertex),
+            end_vertex: i16::from_le_bytes(end_vertex),
+            flags: i16::from_le_bytes(flags),
+            special_type: i16::from_le_bytes(special_type),
+            sector_tag: i16::from_le_bytes(sector_tag),
+            front_sidedef: i16::from_le_bytes(front_sidedef),
+            back_sidedef: i16::from_le_bytes(back_sidedef),
+        });
+    }
+
+    linedef_list
+}

src/doomlevel/linedef.rs

@@ -0,0 +1,47 @@
+pub struct Linedef {
+    pub start_vertex: i16,
+    pub end_vertex: i16,
+    pub flags: i16,
+    pub special_type: i16,
+    pub sector_tag: i16,
+    pub front_sidedef: i16,
+    pub back_sidedef: i16,
+}
+
+impl Linedef {
+    pub fn blocks_players(&self) -> bool {
+        self.flags & (1 << 0) != 0
+    }
+
+    pub fn blocks_monsters(&self) -> bool {
+        self.flags & (1 << 1) != 0
+    }
+
+    pub fn is_two_sided(&self) -> bool {
+        self.flags & (1 << 2) != 0
+    }
+
+    pub fn is_upper_unpegged(&self) -> bool {
+        self.flags & (1 << 3) != 0
+    }
+
+    pub fn is_lower_unpegged(&self) -> bool {
+        self.flags & (1 << 4) != 0
+    }
+
+    pub fn is_secret(&self) -> bool {
+        self.flags & (1 << 5) != 0
+    }
+
+    pub fn blocks_sound(&self) -> bool {
+        self.flags & (1 << 6) != 0
+    }
+
+    pub fn never_automap(&self) -> bool {
+        self.flags & (1 << 7) != 0
+    }
+
+    pub fn always_automap(&self) -> bool {
+        self.flags & (1 << 8) != 0
+    }
+}

src/main.rs

@@ -35,12 +35,53 @@ Header:
         );
     }
 
-    println!("\nFirst 20 Vertex Entries for E1M1:");
+    println!("\nFirst 15 Vertex Entries for {}:", level.name);
 
-    for i in 0..20 {
+    for i in 0..15 {
         println!(
             "\t{} - ({}, {})",
             i, level.vertexes[i].x, level.vertexes[i].y
         );
     }
+
+    let test_linedef = 247;
+
+    println!("\nLinedef Entry {} for {}:", test_linedef, level.name);
+
+    println!(
+        "Start Vertex: {}
+End Vertex: {}
+Flags: {}
+Special Type: {}
+Sector Tag: {}
+Front Sidedef: {}
+Back Sidedef: {}
+
+Flags:
+\tBlocks Players: {}
+\tBlocks Monsters: {}
+\tTwo Sided: {}
+\tUpper Texture Unpegged: {}
+\tLower Texture Unpegged: {}
+\tSecret: {}
+\tBlocks Sound: {}
+\tNever Shows on Automap: {}
+\tAlways Shows on Automap {}",
+        level.linedefs[test_linedef].start_vertex,
+        level.linedefs[test_linedef].end_vertex,
+        level.linedefs[test_linedef].flags,
+        level.linedefs[test_linedef].special_type,
+        level.linedefs[test_linedef].sector_tag,
+        level.linedefs[test_linedef].front_sidedef,
+        level.linedefs[test_linedef].back_sidedef,
+        level.linedefs[test_linedef].blocks_players(),
+        level.linedefs[test_linedef].blocks_monsters(),
+        level.linedefs[test_linedef].is_two_sided(),
+        level.linedefs[test_linedef].is_upper_unpegged(),
+        level.linedefs[test_linedef].is_lower_unpegged(),
+        level.linedefs[test_linedef].is_secret(),
+        level.linedefs[test_linedef].blocks_sound(),
+        level.linedefs[test_linedef].never_automap(),
+        level.linedefs[test_linedef].always_automap()
+    );
 }