From f177cc716c5f2aa5b50b14ccbb421de89e3a7854 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sun, 16 Aug 2026 17:29:42 -0700
Subject: wip

---
 src/sim/cell/materials/mod.rs | 88 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/sim/cell/materials/mod.rs

(limited to 'src/sim/cell/materials/mod.rs')

diff --git a/src/sim/cell/materials/mod.rs b/src/sim/cell/materials/mod.rs
new file mode 100644
index 0000000..a55ed51
--- /dev/null
+++ b/src/sim/cell/materials/mod.rs
@@ -0,0 +1,88 @@
+use crate::sim::cell_sim::sim::UpdateCtx;
+
+mod fire;
+mod gas;
+mod sand;
+mod smoke;
+mod water;
+
+#[repr(u8)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum MaterialId {
+    Void = 0,
+    Sand,
+    Wood,
+    Water,
+    Gas,
+    Fire,
+    Smoke,
+}
+
+pub struct MaterialDef {
+    pub name: &'static str,
+    pub color: (u8, u8, u8, u8),
+    pub density: u8,
+    pub sim_update: Option<fn(ctx: &mut UpdateCtx) -> ()>,
+}
+
+static MATERIALS: [MaterialDef; 7] = [
+    MaterialDef {
+        name: "Void",
+        color: (0x00, 0x00, 0x00, 0x00),
+        density: 0,
+        sim_update: None,
+    },
+    MaterialDef {
+        name: "Sand",
+        color: (0xDE, 0xCB, 0x85, 0xFF),
+        density: 50,
+        sim_update: Some(sand::sim_update),
+    },
+    MaterialDef {
+        name: "Wood",
+        color: (0x85, 0x56, 0x1D, 0xFF),
+        density: 50,
+        sim_update: None,
+    },
+    MaterialDef {
+        name: "Water",
+        color: (0x38, 0xA9, 0xFF, 0xFF),
+        density: 40,
+        sim_update: Some(water::sim_update),
+    },
+    MaterialDef {
+        name: "Gas",
+        color: (0xBD, 0xFF, 0xE4, 0xAA),
+        density: 10,
+        sim_update: Some(gas::sim_update),
+    },
+    MaterialDef {
+        name: "Fire",
+        color: (0xFC, 0x66, 0x00, 0xAA),
+        // for now this matches wood
+        density: 50,
+        sim_update: Some(fire::sim_update),
+    },
+    MaterialDef {
+        name: "Smoke",
+        color: (0x32, 0x35, 0x36, 0xAA),
+        density: 15,
+        sim_update: Some(smoke::sim_update),
+    },
+];
+
+impl MaterialId {
+    pub const ALL: [MaterialId; 7] = [
+        MaterialId::Void,
+        MaterialId::Sand,
+        MaterialId::Wood,
+        MaterialId::Water,
+        MaterialId::Gas,
+        MaterialId::Fire,
+        MaterialId::Smoke,
+    ];
+    #[inline]
+    pub fn def(self) -> &'static MaterialDef {
+        &MATERIALS[self as usize]
+    }
+}
-- 
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