1 files changed, 11 insertions, 0 deletions

diff --git a/src/lisp/prelude.rs b/src/lisp/prelude.rs
index fee787e..d0667d8 100644
--- a/src/lisp/prelude.rs
+++ b/src/lisp/prelude.rs
@@ -1,6 +1,7 @@
 use crate::{
     bitmap::MapPoint,
     brush::Brush,
+    grid::{Grid, GridKind},
     guide::Guide,
     lisp::{
         error::{EvalError, LispError},
@@ -257,6 +258,16 @@ pub fn new_env() -> Result<Environment, LispError> {
         Ok(LispExpr::Unit)
     });
 
+    primitive!(env, Arity::Exact(0), "grid-rectangle", |_, app| {
+        app.grid.kind = GridKind::Rectangle;
+        Ok(LispExpr::Unit)
+    });
+
+    primitive!(env, Arity::Exact(0), "grid-isometric", |_, app| {
+        app.grid.kind = GridKind::Isometric;
+        Ok(LispExpr::Unit)
+    });
+
     primitive!(env, Arity::Exact(0), "brush-fill", |_, app| {
         app.brush = Brush::Fill;
         Ok(LispExpr::Unit)