done, just need to add some documentation and clean up code a bit

falling.rs

@@ -1,10 +1,10 @@
 use rand::Rng;
 use std::io::{stdin,stdout,Write};
+use console::Term;
 
 fn output_levels(starting_level: u64, ending_level: u64, character_x_coord: u8, character_icon: char, levels: &Vec<Vec<u8>>) {
     print!("{}[2J", 27 as char);
     for i in starting_level..ending_level {
-        print!("{}   ", i);
         for j in 0..levels[i as usize].len() {
             let object = levels[i as usize][j as usize];
             if i == starting_level && j == character_x_coord as usize { print!("{}",character_icon) }
@@ -14,29 +14,64 @@ fn output_levels(starting_level: u64, ending_level: u64, character_x_coord: u8,
             else if object == 1 { print!("/") }
             else { print!("|") }
         }
-        println!();
+        println!("    {}",i);
     }
 }
-fn generate_level(level_to_generate: u64, difficulty: u8, mut left_wall: u8, mut right_wall: u8, levels: &mut Vec<Vec<u8>>) {
+fn generate_level(level_to_generate: u64, difficulty: u8, left_wall: &mut i8, right_wall: &mut i8, screen_width: u8, levels: &mut Vec<Vec<u8>>) {
     let mut new_level: Vec<u8> = Vec::new();
 
-    let left_wall_change = rand::thread_rng().gen_range(-2..2);
-    let right_wall_change = rand::thread_rng().gen_range(-1..1);
-    let mut left_wall_temp = left_wall as i8 + left_wall_change;
-    if left_wall_temp >= 0 { left_wall = left_wall_temp as u8 }
-    right_wall = (right_wall as i8 + right_wall_change) as u8;
+    let left_wall_change = rand::thread_rng().gen_range(-1..2);
+    let right_wall_change = rand::thread_rng().gen_range(-1..2);
+    //println!("lwc: {}, rwc: {}", left_wall_change, right_wall_change);
+    *left_wall = *left_wall + left_wall_change;
+    *right_wall = *right_wall + right_wall_change;
+    if *left_wall <= 0 {
+        *left_wall = 1;
+    }
+    if *right_wall >= screen_width.try_into().unwrap() {
+        *right_wall = screen_width as i8-1
+    }
+    //println!("lw: {}, rw: {}", left_wall, right_wall);
+    if (*right_wall-*left_wall).abs() < 8 {
+        println!("VERY CLOSE");
+        *left_wall-=2;
+        *right_wall+=2;
+    }
+    //let mut left_wall_temp = left_wall as i8 + left_wall_change;
+    //if left_wall_temp >= 0 { left_wall = left_wall_temp as u8 }
+    //right_wall = (right_wall as i8 + right_wall_change) as u8;
 
-    for i in 0..right_wall+1 {
+    for i in 0..screen_width {
         new_level.push(4)
     }
 
-    new_level[left_wall as usize] = 0;
-    for i in left_wall+1..right_wall-1 {
+    for i in *left_wall+1..*right_wall-1 {
         let mut rng = rand::thread_rng();
         let object: u8 = rand::thread_rng().gen_range(3..difficulty);
         new_level[i as usize] = object;
     }
-    new_level[right_wall as usize] = 0;
+    for i in 0..*left_wall {
+        if i == *left_wall-1 && left_wall_change > 0 {
+            new_level[i as usize] = 2;
+        }
+        else if i == *left_wall-1 && left_wall_change < 0 {
+            new_level[i as usize] = 1;
+        }
+        else {
+            new_level[i as usize] = 0;
+        }
+    }
+    for i in *right_wall..screen_width as i8 {
+        if i == *right_wall && right_wall_change > 0 {
+            new_level[i as usize] = 2;
+        }
+        else if i == *right_wall && right_wall_change < 0 {
+            new_level[i as usize] = 1;
+        }
+        else {
+            new_level[i as usize] = 0;
+        }
+    }
     levels.push(new_level);
 }
 
@@ -52,39 +87,50 @@ fn input() -> String{
     }
     return s;
 }
+fn check_if_alive(levels: &Vec<Vec<u8>>, level: usize, x_coord: usize) -> bool {
+    println!("{}",levels[level][x_coord]);
+    if levels[level][x_coord] == 0 || levels[level][x_coord] == 1 || levels[level][x_coord] == 2 || levels[level][x_coord] == 3 {
+        println!("GAME OVER");
+        return false;
+    }
+    else {
+        return true;
+    }
+}
 
 fn main() {
     let mut levels: Vec<Vec<u8>> = Vec::new();
     
-    let screen_height: u8 = 20;
-    let screen_width: u8 = 11;
+    let screen_height: u8 = 70;
+    let screen_width: u8 = 100;
     let difficulty: u8 = 10;
-    
+    let stdout = Term::buffered_stdout();
 
     let mut current_level: u64 = 0;
     let character_icon: char = 'µ';
     let mut x_coord: u8 = (screen_width as f32/ 2.0) as u8; // Distance from left wall
-    let mut left_wall: u8 = 0;
-    let mut right_wall: u8 = screen_width;
-
+    let mut left_wall: i8 = (screen_width as f32/ 4.0) as i8;
+    let mut right_wall: i8 = ((screen_width as f32 * 3.0)/ 4.0) as i8;
+    let mut alive: bool = true;
 
     for i in 1..screen_height {
-        generate_level(i as u64, difficulty, left_wall, right_wall, &mut levels)
+        generate_level(i as u64, difficulty, &mut left_wall, &mut right_wall, screen_width, &mut levels)
     };
-    loop {
-        generate_level(current_level, difficulty, left_wall, right_wall, &mut levels);
+    'game_loop: loop {
+        generate_level(current_level, difficulty, &mut left_wall, &mut right_wall, screen_width, &mut levels);
         output_levels(current_level, current_level + screen_height as u64, x_coord, character_icon, &levels);
-        let direction = input();
-        if direction == "r" { 
-            if x_coord < screen_width-1 { 
-                x_coord += 1 
+        if let Ok(character) = stdout.read_char() {
+            match character {
+                'd' => if x_coord < screen_width-1 { x_coord += 1 },
+                'a' => if x_coord > 1 { x_coord -= 1 },
+                'q' => break 'game_loop,
+                _ => (),
             }
         }
-        else if direction == "l" { 
-            if x_coord > 1 {
-                x_coord -= 1 
-            }
+        current_level+=1;
+        alive = check_if_alive(&levels, current_level as usize, x_coord as usize);
+        if alive == false {
+            break 'game_loop
         }
-        current_level+=1
     }
 }