Stuck on day 8

crates/day_8/src/map.rs

@@ -11,7 +11,7 @@
 // single lowercase letter, uppercase letter, or digit.
 
 
-use std::{collections::HashMap,  mem};
+use std::{io::prelude::*, fs::File, collections::HashMap,  mem};
 
 use nalgebra_glm::Vec2;
 
@@ -38,10 +38,31 @@ impl PointIdx
 		PointIdx { i, j }
 	}
 
-	// pub fn as_glm_vec(self: & PointIdx) -> I32Vec2
-	// {
-	// 	I32Vec2::new(self.i as i32, self.j as i32)
-	// }
+	pub fn from_glm_vec(glm_vec: &Vec2) -> PointIdx
+	{
+		PointIdx{ i: glm_vec.x as usize, j: glm_vec.y as usize }
+	}
+
+	pub fn as_glm_vec(self: & PointIdx) -> Vec2
+	{
+		Vec2::new(self.i as f32, self.j as f32)
+	}
+
+}
+
+#[derive(Copy, Clone, PartialEq, Debug)]
+pub struct Antinode
+{
+	location: PointIdx,
+	freq: u8,
+}
+
+impl Antinode
+{
+	pub fn new(location: PointIdx, freq: u8) -> Antinode
+	{
+		Antinode { location, freq }
+	}
 }
 
 #[derive(Clone, Debug)]
@@ -49,18 +70,22 @@ pub struct Map
 {
 	map: Vec<Vec<MapCell>>,
 	antenna_locations: HashMap<u8, Vec<PointIdx>>,
-	antinodes: Vec<PointIdx>,
+	antinodes: Vec<Antinode>,
+
+	// DEBUG STUFF
+	first_processed_freq: u8,
 }
 
 impl Map
 {
 	pub fn new() -> Map
 	{
-		Map { map: vec![], antenna_locations: HashMap::new(), antinodes: vec![] }
+		Map { map: vec![], antenna_locations: HashMap::new(), antinodes: vec![], first_processed_freq: 0 }
 	}
 
 	pub fn parse(data: &str) -> Map
 	{
+		// let mut num_freqs = 0;
 		let mut split_pattern = "\n";
 		if data.contains("\r\n")
 		{
@@ -101,10 +126,14 @@ impl Map
 				}
 			}
 
+
 			map.push(parsed_row);
 		}
 
-		Map { map, antenna_locations, antinodes: vec![] }
+		// DEBUG:
+		// println!("num freqs found: {}", antenna_locations.len());
+
+		Map { map, antenna_locations, antinodes: vec![], first_processed_freq: 0 }
 	}
 
 	pub fn double_check_antenna_locations(self: &Map) -> bool
@@ -141,22 +170,18 @@ impl Map
 		{
 			print!("MAP:");
 		}
-		for (i, row) in self.map.iter().enumerate()
+		for (_i, row) in self.map.iter().enumerate()
 		{
 			print!("\n\t");
-			for (j, c) in row.iter().enumerate()
+			for (_j, c) in row.iter().enumerate()
 			{
-				if include_antinodes && self.antinodes.contains(&PointIdx::new(i, j))
+				match c
 				{
-					print!("#");
-				}
-				else
-				{
-					match c
+					MapCell::Empty => print!("."),	
+					MapCell::Freq(f) => 
 					{
-						MapCell::Empty => print!("."),	
-						MapCell::Freq(f) => print!("{}", *f as char),	
-					}
+						print!("{}", *f as char);
+					},
 				}				
 			}
 		}
@@ -168,6 +193,40 @@ impl Map
 		println!("{:#?}", self.antenna_locations);
 	}
 
+	pub fn dump_map_data_by_freq(self: &Map, filename: &str)
+	{
+		let mut file = File::create("foo.txt").expect(&format!("Failed to create file {}", filename));
+		for (freq, _locations) in &self.antenna_locations
+		{
+			file.write_all(&format!("\nMap for freq: {}", *freq as char).as_bytes()).expect("Failed to write to file!");
+
+			for (_i, row) in self.map.iter().enumerate()
+			{
+				file.write_all(b"\n\t").expect("Failed to write to file again");
+				for (_j, c) in row.iter().enumerate()
+				{
+
+					match c
+					{
+						MapCell::Empty => file.write_all(b".").expect("Failed to write to file (in match statement)"),	
+						MapCell::Freq(f) => 
+						{
+							if *freq == *f
+							{
+								file.write_all(&format!("{}", *f as char).as_bytes()).expect("Failed to write to file (in match statement 2)");
+							}
+							else
+							{
+								file.write_all(b".").expect("Failed to write to file (in match statement 3)");
+							}
+						},
+					}
+				}
+			}
+		}
+
+	}
+
 	// an antinode occurs at any point that is perfectly in line with two antennas of the same 
 	// frequency - but only when one of the antennas is twice as far away as the other
 	// This means that for any pair of antennas with the same frequency, there are two antinodes, one on either side of them.
@@ -185,11 +244,12 @@ impl Map
 	// ..........
 	// ..........
 
-	pub fn find_antinodes(self: &mut Map) -> Vec<PointIdx>
+	pub fn find_antinodes(self: &mut Map) -> Vec<Antinode>
 	{
-		let mut antinodes: Vec<PointIdx> = vec![];
-		for (_freq, locations) in &self.antenna_locations
+		let mut antinodes: Vec<Antinode> = vec![];
+		for (freq, locations) in &self.antenna_locations
 		{
+			self.first_processed_freq = *freq;
 			let mut i = 0;
 			while i < locations.len()
 			{
@@ -214,26 +274,22 @@ impl Map
 					let direction = (second_glm - first_glm).normalize();
 
 
-					let new_i = (locations[i].i as f32 + direction.x * dist);
-					let new_j = (locations[i].j as f32 + direction.y * dist);
+					let new_i = locations[i].i as f32 + direction.x * dist;
+					let new_j = locations[i].j as f32 + direction.y * dist;
 
-					if new_i < 0.0 || new_j < 0.0
-					{
-						j += 1;
-						continue;
-					}
-					if new_i >= self.map.len() as f32 ||
+					if new_i < 0.0 || new_j < 0.0 ||
+						new_i >= self.map.len() as f32 ||
 						new_j >= self.map[0].len() as f32
 					{
 						j += 1;
 						continue;
 					}
 
-					let antinode_location = PointIdx::new(new_i as usize, new_j as usize);
+					let antinode = Antinode::new(PointIdx::new(new_i as usize, new_j as usize), *freq);
 
-					if !antinodes.contains(&antinode_location)
+					if !antinodes.contains(&antinode)
 					{
-						antinodes.push(antinode_location);
+						antinodes.push(antinode);
 					}
 
 					j += 1;