From d8a37c6e9aedaa7b3a1872b2fc8cf8f74882c330 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Tue, 3 Nov 2026 21:44:43 -0500
Subject: [PATCH] Add shapes to grammar

---
 src/fart.propane    | 64 ++++++++++++++++++++++++++++++++++++++++++++-
 src/fart/Parser.cpp |  6 +++--
 src/fart/Parser.h   |  4 +--
 3 files changed, 69 insertions(+), 5 deletions(-)

diff --git a/src/fart.propane b/src/fart.propane
index 5ad6515..bcc7cbc 100644
--- a/src/fart.propane
+++ b/src/fart.propane
@@ -22,15 +22,33 @@ static bool parse_number(uint8_t const * match_text, size_t match_length, double
 >>
 
 drop /\s+/;
+drop /#.*/;
 
 token background;
+token box;
+token camera;
+token color;
 token comma /,/;
+token cyl;
 token gt />/;
 token height;
+token intersect;
 token lcurly /\{/;
 token lt /</;
+token material;
 token options;
+token plane;
+token position;
 token rcurly /\}/;
+token rotate;
+token scale;
+token size;
+token sphere;
+token subtract;
+token target;
+token translate;
+token union;
+token up;
 token width;
 
 token uint /\d+/ <<
@@ -46,10 +64,12 @@ token number /-?\d+(\.\d+)?/ <<
     }
 >>
 
-Start -> Options? SceneItems;
+start Scene;
 
 Background -> background Vector;
 
+Color -> color Vector;
+
 Height -> height uint;
 
 Number -> uint;
@@ -64,7 +84,49 @@ OptionsItem -> Background;
 OptionsItem -> Height;
 OptionsItem -> Width;
 
+Position -> position Vector;
+
+Rotate -> rotate Number comma Vector;
+Rotate -> rotate Number comma Vector lcurly SceneItems rcurly;
+
+Scale -> scale Number;
+Scale -> scale Number lcurly SceneItems rcurly;
+Scale -> scale Vector;
+Scale -> scale Vector lcurly SceneItems rcurly;
+
+SceneItemBlock -> SceneItemName lcurly SceneItems rcurly;
+
+Scene -> Options? SceneItems;
+
 SceneItems -> ;
+SceneItems -> SceneItem SceneItems;
+
+SceneItem -> Color;
+SceneItem -> Position;
+SceneItem -> Rotate;
+SceneItem -> Scale;
+SceneItem -> SceneItemBlock;
+SceneItem -> Size;
+SceneItem -> Target;
+SceneItem -> Translate;
+SceneItem -> Up;
+
+SceneItemName -> box;
+SceneItemName -> camera;
+SceneItemName -> cyl;
+SceneItemName -> material;
+SceneItemName -> plane;
+SceneItemName -> sphere;
+
+Size -> size Number;
+Size -> size Vector;
+
+Target -> target Vector;
+
+Translate -> translate Vector;
+Translate -> translate Vector lcurly SceneItems rcurly;
+
+Up -> up Vector;
 
 Vector -> lt Number comma Number comma Number gt;
 Vector -> lt Number comma Number comma Number comma Number gt;
diff --git a/src/fart/Parser.cpp b/src/fart/Parser.cpp
index 15f8267..e821138 100644
--- a/src/fart/Parser.cpp
+++ b/src/fart/Parser.cpp
@@ -112,13 +112,15 @@ static Color vector_to_color(PVector vector)
     return color;
 }
 
-Scene * Parser::build_scene(const string_view & input_file, PStart start)
+Scene * Parser::build_scene(const string_view & input_file, PScene pscene)
 {
     Scene * scene = new Scene();
 
     /* If the options block is absent, pOptions() returns a null node and so
      * does pOptionsItems() on it, so the loop body is skipped. */
-    for (POptionsItems items = start.pOptions().pOptionsItems(); p_node_valid(items); items = items.pOptionsItems())
+    for (POptionsItems items = pscene.pOptions().pOptionsItems();
+         p_node_valid(items);
+         items = items.pOptionsItems())
     {
         POptionsItem item = items.pOptionsItem();
         bool ok = true;
diff --git a/src/fart/Parser.h b/src/fart/Parser.h
index f3bb243..2bd188f 100644
--- a/src/fart/Parser.h
+++ b/src/fart/Parser.h
@@ -2,7 +2,7 @@
 
 #include <fart/Scene.h>
 
-struct PStart;
+struct PScene;
 
 class Parser
 {
@@ -10,5 +10,5 @@ public:
     static Scene * load_scene(const string_view & input_file);
 
 private:
-    static Scene * build_scene(const string_view & input_file, PStart start);
+    static Scene * build_scene(const string_view & input_file, PScene pscene);
 };