1 files changed, 111 insertions, 0 deletions
diff --git a/src/content/materials/mod.rs b/src/content/materials/mod.rs
new file mode 100644
index 0000000..8116565
--- /dev/null
+++ b/src/content/materials/mod.rs
@@ -0,0 +1,111 @@
+use crate::sim::cell_manager::sim::{PostUpdateAction, UpdateCtx};
+
+pub mod fire;
+pub mod gas;
+pub mod liquid;
+pub mod powder;
+
+#[repr(u8)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum MaterialId {
+    Void = 0,
+    Sand,
+    Wood,
+    Water,
+    Fire,
+    Smoke,
+    Steel,
+}
+
+#[repr(u8)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum MaterialForm {
+    Void,
+    Gas,
+    Liquid,
+    Powder,
+    Solid,
+}
+
+pub struct MaterialDef {
+    pub name: &'static str,
+    pub color: (u8, u8, u8, u8),
+    pub density: u8,
+    pub form: MaterialForm,
+    pub sim_update: Option<fn(ctx: &mut UpdateCtx) -> PostUpdateAction>,
+}
+
+static MATERIALS: [MaterialDef; 7] = [
+    MaterialDef {
+        name: "Void",
+        color: (0x00, 0x00, 0x00, 0x00),
+        density: 0,
+        // form usually but not always determines the update fn
+        form: MaterialForm::Void,
+        sim_update: None,
+    },
+    MaterialDef {
+        name: "Sand",
+        color: (0xDE, 0xCB, 0x85, 0xFF),
+        density: 50,
+        form: MaterialForm::Powder,
+        sim_update: Some(powder::sim_update),
+    },
+    MaterialDef {
+        name: "Wood",
+        color: (0x85, 0x56, 0x1D, 0xFF),
+        density: 50,
+        form: MaterialForm::Solid,
+        sim_update: None,
+    },
+    MaterialDef {
+        name: "Water",
+        color: (0x38, 0xA9, 0xFF, 0xFF),
+        density: 40,
+        form: MaterialForm::Liquid,
+        sim_update: Some(liquid::sim_update),
+    },
+    // TODO this is not a material
+    MaterialDef {
+        name: "Fire",
+        color: (0xFC, 0x66, 0x00, 0xAA),
+        // for now this matches wood
+        density: 50,
+        form: MaterialForm::Gas,
+        sim_update: Some(fire::sim_update),
+    },
+    MaterialDef {
+        name: "Smoke",
+        color: (0x32, 0x35, 0x36, 0xAA),
+        density: 15,
+        form: MaterialForm::Gas,
+        sim_update: Some(gas::sim_update),
+    },
+    MaterialDef {
+        name: "Steel",
+        color: (0x60, 0x60, 0x60, 0xFF),
+        density: 150,
+        form: MaterialForm::Solid,
+        sim_update: None,
+    },
+];
+
+impl MaterialId {
+    pub const ALL: [MaterialId; 7] = [
+        MaterialId::Void,
+        MaterialId::Sand,
+        MaterialId::Wood,
+        MaterialId::Water,
+        MaterialId::Fire,
+        MaterialId::Smoke,
+        MaterialId::Steel,
+    ];
+    #[inline]
+    pub fn def(self) -> &'static MaterialDef {
+        &MATERIALS[self as usize]
+    }
+
+    pub fn from_index(idx: u8) -> MaterialId {
+        MaterialId::ALL[idx as usize]
+    }
+}