Merge pull request #929 from marquesrs/3D-plot-rust-implementation

Rust implementation for the game 3D Plot

Author: coding-horror

Diff for: 87_3-D_Plot/rust/Cargo.lock

@@ -0,0 +1,6 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

Diff for: 87_3-D_Plot/rust/Cargo.toml

@@ -0,0 +1,68 @@
+/** 3D Plot GAME 
+ * https://github.com/coding-horror/basic-computer-games/blob/main/87_3-D_Plot/3dplot.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
+*/
+
+fn main() {
+    //1 PRINT TAB(32);"3D PLOT"
+    //2 PRINT TAB(15);"CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY"
+    //3 PRINT:PRINT:PRINT
+    print!("{}",
+        format!("{}{}\n{}{}\n\n\n\n",
+            " ".repeat(31),
+            "3D PLOT",
+            " ".repeat(14),
+            "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY"
+        )
+    );
+
+    //5 DEF FNA(Z)=30*EXP(-Z*Z/100)
+    let fna = |z: f32| {30.0 * f32::exp(-z*z/100.0)};
+
+    //100 PRINT
+    println!();
+    
+    let mut line_content = String::new();
+    //110 FOR X=-30 TO 30 STEP 1.5
+    let mut x = -30.0;
+    while x <= 30.0 {
+        //120 L=0
+        let mut l = 0;
+        
+        //130 Y1=5*INT(SQR(900-X*X)/5)
+        let y1 = 5.0 * (f32::sqrt(900.0-x*x)/5.0).floor();
+
+        //140 FOR Y=Y1 TO -Y1 STEP -5
+        let mut y = y1;
+        while y >= -y1 {
+            //150 Z=INT(25+FNA(SQR(X*X+Y*Y))-.7*Y)
+            let z = (25.0 + fna(f32::sqrt(x*x+y*y))-0.7*y) as i32;
+
+            //160 IF Z<=L THEN 190
+            if z <= l {
+                y = y - 5.0;
+                continue;
+            }
+            //170 L=Z
+            l = z;
+            //180 PRINT TAB(Z);"*";
+            while (line_content.len() as i32) < (z-1) {
+                line_content += " ";
+            }
+            line_content += "*";
+            //190 NEXT Y
+            y = y - 5.0;
+        }
+        print!("{}", line_content);
+        line_content.clear();
+
+        //200 PRINT
+        println!();
+        //210 NEXT X
+        x = x + 1.5;
+    }
+    //300 END
+}

Diff for: 87_3-D_Plot/rust/src/main.rs

@@ -164,7 +164,7 @@ NOTE: per [the official blog post announcement](https://blog.codinghorror.com/up
 | 84_Super_Star_Trek     | x      | x    | x          |        |     |      | x      |      | x    | x     |
 | 85_Synonym             | x      | x    | x          |        |     | x    | x      | x    | x    | x     |
 | 86_Target              | x      | x    | x          |        |     | x    | x      |      |      | x     |
-| 87_3-D_Plot            | x      | x    | x          |        |     | x    | x      | x    |      | x     |
+| 87_3-D_Plot            | x      | x    | x          |        |     | x    | x      | x    | x    | x     |
 | 88_3-D_Tic-Tac-Toe     | x      |      | x          |        |     |      | x      |      |      | x     |
 | 89_Tic-Tac-Toe         | x      | x    | x          | x      |     | x    | x      |      | x    | x     |
 | 90_Tower               | x      | x    | x          |        |     | x    | x      |      | x    | x     |