feat(rtlisp): add rt_inerp binary and demo script

src/bin/rt_interp.rs

@@ -0,0 +1,38 @@
+use std::env;
+
+use lispers::raytracer::lisp::mk_raytrace;
+use lispers_core::lisp::environment::EnvironmentLayer;
+use lispers_core::lisp::prelude::mk_prelude;
+use lispers_core::lisp::{eval, Environment};
+use lispers_core::parser::ExpressionStream;
+
+fn main() {
+    let program_paths: Vec<_> = env::args().skip(1).collect();
+    let programs: Vec<_> = program_paths
+        .iter()
+        .map(|path| std::fs::read_to_string(path).unwrap())
+        .collect();
+
+    let mut layer = EnvironmentLayer::new();
+    mk_prelude(&mut layer);
+    mk_raytrace(&mut layer);
+
+    let environment = Environment::from_layer(layer);
+
+    for (i, r) in
+        ExpressionStream::from_char_stream(programs.iter().map(|p| p.chars()).flatten()).enumerate()
+    {
+        match r {
+            Err(err) => {
+                println!("ParserError in Expression {}: {:?}", i + 1, err);
+                break;
+            }
+            Ok(expr) => match eval(&environment, expr) {
+                Ok(_) => {}
+                Err(e) => println!("Error evaluating Expression {}: {}", i + 1, e),
+            },
+        }
+    }
+
+    println!("Interpreter Done!");
+}

src/bin/rt_lisp_demo.rs

@@ -6,20 +6,21 @@ use lispers_core::parser::ExpressionStream;
 
 fn main() {
     let programs = [
-        "(vadd (vector 1 2 3) (vector 4 5 6))",
-        "(vadd (vector 1 2 3) (point 4 5 6))",
-        "(vadd (point 1 2 3) (vector 4 5 6))",
-        "(vadd (point 1 2 3) (point 4 5 6))",
+        "(set 'red (material (color 1 0 0) (color 1 0 0) (color 0.5 0 0) 50 0.25))",
         "(set 'blue (material (color 0 0 1) (color 0 0 1) (color 0 0 0.6) 50 0.25))",
         "(set 'green (material (color 0 1 0) (color 0 1 0) (color 0 0.6 0) 50 0.25))",
         "(set 'white (material (color 1 1 1) (color 1 1 1) (color 0.6 0.6 0.6) 100 0.5))",
         "(set 'black (material (color 0 0 0) (color 0 0 0) (color 0.6 0.6 0.6) 100 0.5))",
         "(set 's1 (sphere (point 0 1 0) 1 blue))",
         "(set 's2 (sphere (point 2 0.5 2) 0.5 green))",
+        "(defun spiral-sphere (i n) (sphere (print (point (* 2 (cos (/ (* i 6.2) n))) 0.5 (* 2 (sin (/ (* i 6.2) n))))) 0.5 red))",
+        "(defun spiral (scn i n) (if (< i n) (scene-add (spiral scn (+ i 1) n) (spiral-sphere i n)) scn))",
         "(set 'p1 (checkerboard (point 0 0 0) (vector 0 1 0) black white 0.5 (vector 0.5 0 1)))",
         "(set 'l1 (light (point 3 10 5) (color 1 1 1)))",
         "(set 'l2 (light (point 2 10 5) (color 1 1 1)))",
         "(set 'scn (scene (color 0.1 0.1 0.1) '(s1 s2 p1) '(l1 l2)))",
+        "(set 'scn (spiral scn 0.0 10.0))",
+        "(print scn)",
         "(set 'cam (camera (point 0 3 6) (point 0 0 0) (vector 0 1 0) 40 1920 1080))",
         "(render cam scn 5 4 \"rt-lisp-demo.png\")",
     ];