bounce game initial rust implementation

Author: marquesrs

13_Bounce/rust/src/main.rs

@@ -1,3 +1,11 @@
+/** BOUNCE GAME 
+ * https://github.com/coding-horror/basic-computer-games/blob/main/13_Bounce/bounce.bas
+ * Direct conversion from BASIC to Rust by Pablo Marques (marquesrs).
+ * No additional features or improvements were added. As a faithful translation, 
+ * many of the code here are done in an unrecommended way by today's standards.
+ * 03/03/25
+*/
+
 use std::io::Write;
 
 fn input(msg: &str) -> String {
@@ -41,22 +49,22 @@ fn main() {
 
     loop {
        //135 INPUT "TIME INCREMENT (SEC)";S2
-        //let s2 = input("TIME INCREMENT (SEC): ").parse::<f32>().unwrap();
-        let s2 = 0.1f32;
+        let s2 = input("TIME INCREMENT (SEC): ").parse::<f32>().unwrap();
+        //let s2 = 0.2f32;
 
         //140 PRINT
         println!();
 
         //150 INPUT "VELOCITY (FPS)";V
-        //let v = input("VELOCITY (FPS): ").parse::<f32>().unwrap();
-        let v = 20.0f32;
+        let v = input("VELOCITY (FPS): ").parse::<f32>().unwrap();
+        //let v = 20.0f32;
 
         //160 PRINT
         println!();
 
         //170 INPUT "COEFFICIENT";C
-        //let c = input("COEFFICIENT: ").parse::<f32>().unwrap();
-        let c = 0.5f32;
+        let c = input("COEFFICIENT: ").parse::<f32>().unwrap();
+        //let c = 0.6f32;
 
         //180 PRINT
         //182 PRINT "FEET"
@@ -74,93 +82,102 @@ fn main() {
         }
 
         let mut l = 0.0;
-        let mut l_expected = l;
 
         //220 FOR H=INT(-16*(V/32)^2+V^2/32+.5) TO 0 STEP -.5
         let mut h = (-16.0 * (v / 32.0).powi(2) + (v.powi(2)) / 32.0 + 0.5).floor();
         while h >= 0.0 {
+            let mut line_content = String::new();
             //221 IF INT(H)<>H THEN 225
             if h.floor() == h {
                 //222 PRINT H;
-                print!("{}", h);
+                line_content.push_str(h.to_string().as_str());
+                line_content.push(' ');
             }
             //225 L=0
             l = 0.0;
-            l_expected = l;
             //230 FOR I=1 TO S1
             for i in 1..=s1 {
-                let mut T = 0.0;
+                let mut t_val = 0.0;
                 //240 FOR T=0 TO T(I) STEP S2
-                while T <= t[(i - 1) as usize] {
+                while t_val <= t[(i - 1) as usize] {
                     //245 L=L+S2
                     l = l + s2;
-                    l_expected = l_expected + s2;
 
                     //250 IF ABS(H-(.5*(-32)*T^2+V*C^(I-1)*T))>.25 THEN 270
-                    let condition = h - (0.5 * (-32.0) * T.powf(2.0) + v * c.powf((i-1) as f32) * T);
+                    let condition = h - (0.5 * (-32.0) * t_val.powf(2.0) + v * c.powf((i-1) as f32) * t_val);
                     if condition.abs() >= 0.25{
-                        T = T + s2;
+                        t_val = t_val + s2;
                         continue;
                     }
                     // TABS ARE NOT SPACES, BUT A TERMINAL POSITION
                     //260 PRINT TAB(L/S2);"0";
-                    let spaces = ((l / s2).floor()-1.0) as usize;
-                    print!("{}0", " ".repeat(spaces));
-                    l = l - spaces as f32;
+                    let spaces = ((l / s2) - 1.0) as usize;
+                    while line_content.len() < spaces  {
+                        line_content.push(' ');
+                    }
+                    line_content.push('0');
 
                     //270 NEXT T
-                    T = T + s2;
+                    t_val = t_val + s2;
                 }
 
                 //275 T=T(I+1)/2
                 if i as usize == t.len() { break; }
-                T = t[i as usize] / 2.0;
+                t_val = t[i as usize] / 2.0;
 
                 //276 IF -16*T^2+V*C^(I-1)*T<H THEN 290
-                if -16.0 * T.powf(2.0) + v * c.powf(i as f32 -1.0) * T <= h {
+                if -16.0 * t_val.powf(2.0) + v * c.powf(i as f32 -1.0) * t_val <= h {
                     break;
                 }
 
                 //280 NEXT I
             }
-            
+            print!("{}", line_content);
             //290 PRINT
             println!();
 
             //300 NEXT H
             h = h - 0.5;
         }
 
-//
+        let mut line_content = String::from("");
+
         //310 PRINT TAB(1);
         print!(" ");
 
         //320 FOR I=1 TO INT(L+1)/S2+1
-        for _ in 1..=((l_expected+1.0) / s2 + 1.0) as i32 {
+        for _ in 1..=((l+1.0) / s2 + 1.0) as i32 {
             //330 PRINT ".";
-            print!(".");
+            line_content.push('.');
             //340 NEXT I
         }
 
         //350 PRINT
         //355 PRINT " 0";
-        print!("\n 0");
+        println!("{}", line_content);
 
+        line_content = String::from(" 0");
+        
         //360 FOR I=1 TO INT(L+.9995)
-        for i in 1..=((l_expected + 0.9995) as i32) {
+        for i in 1..=((l + 0.9995) as i32) {
             //380 PRINT TAB(INT(I/S2));I;
-            print!("{}{}", " ".repeat((i as f32 / s2) as usize), i);
+            while line_content.len() < (i as f32 / s2) as usize {
+            line_content.push(' ');
+            }
+            line_content.push_str(i.to_string().as_str());
             //390 NEXT I
         }
 
+        println!("{}", line_content);
+
         //400 PRINT
         //410 PRINT TAB(INT(L+1)/(2*S2)-2);"SECONDS"
         //420 PRINT
-        let tabs = ((l_expected+1.0) / (2.0 * s2) - 2.0) as usize;
-        println!("\n{}SECONDS\n", " ".repeat(tabs));
+        let tabs = ((l+1.0) / (2.0 * s2) - 2.0) as usize;
+        println!("{}SECONDS\n", " ".repeat(tabs));
 
         //430 GOTO 135
-        break;
+        //break;
     }
     //440 END
 }