1 files changed, 11 insertions, 2 deletions
diff --git a/src/sim/materials/mod.rs b/src/sim/materials/mod.rs
index 86ae7d5..0cba5ff 100644
--- a/src/sim/materials/mod.rs
+++ b/src/sim/materials/mod.rs
@@ -1,5 +1,6 @@
 use crate::sim::sim::UpdateCtx;
 
+mod gas;
 mod sand;
 mod water;
 
@@ -10,6 +11,7 @@ pub enum MaterialId {
     Sand,
     Wood,
     Water,
+    Gas,
 }
 
 pub struct MaterialDef {
@@ -19,7 +21,7 @@ pub struct MaterialDef {
     pub sim_update: Option<fn(ctx: &mut UpdateCtx) -> ()>,
 }
 
-static MATERIALS: [MaterialDef; 4] = [
+static MATERIALS: [MaterialDef; 5] = [
     MaterialDef {
         name: "Void",
         color: (0x00, 0x00, 0x00, 0xFF),
@@ -44,14 +46,21 @@ static MATERIALS: [MaterialDef; 4] = [
         density: 40,
         sim_update: Some(water::sim_update),
     },
+    MaterialDef {
+        name: "Gas",
+        color: (0xBD, 0xFF, 0xE4, 0xAA),
+        density: 10,
+        sim_update: Some(gas::sim_update),
+    },
 ];
 
 impl MaterialId {
-    pub const ALL: [MaterialId; 4] = [
+    pub const ALL: [MaterialId; 5] = [
         MaterialId::Void,
         MaterialId::Sand,
         MaterialId::Wood,
         MaterialId::Water,
+        MaterialId::Gas,
     ];
     #[inline]
     pub fn def(self) -> &'static MaterialDef {