From a272aa9d9b2c642871abe2dc3379e6ffcce8bf56 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Wed, 26 Aug 2026 23:54:09 -0700
Subject: sprite loader

---
 src/content/entities/entity_tnt.rs | 44 ++++++++++++++++++++++++++++++++++++++
 src/content/entities/mod.rs        |  1 +
 src/content/materials/mod.rs       | 21 +++++++++++++-----
 3 files changed, 61 insertions(+), 5 deletions(-)
 create mode 100644 src/content/entities/entity_tnt.rs

(limited to 'src/content')

diff --git a/src/content/entities/entity_tnt.rs b/src/content/entities/entity_tnt.rs
new file mode 100644
index 0000000..2e4cef5
--- /dev/null
+++ b/src/content/entities/entity_tnt.rs
@@ -0,0 +1,44 @@
+use glam::{IVec2, Vec2};
+
+use crate::{
+    sim::{
+        entity::{EntityBehaviour, EntityCells, EntityDef, EntityUpdateCtx},
+        lib::force::apply_explosion,
+        sim_manager::SimCtx,
+    },
+    sprite_loader::load_sprite_to_cells,
+};
+
+struct TntEntityBehaviour {
+    pub fuse: f32,
+}
+
+impl EntityBehaviour for TntEntityBehaviour {
+    fn update(&mut self, update_ctx: &mut EntityUpdateCtx, ctx: &mut SimCtx, delta_time: f32) {
+        self.fuse -= delta_time;
+        if self.fuse <= 0.0 {
+            apply_explosion(
+                ctx,
+                update_ctx.entity_data.transform(ctx).unwrap().0,
+                35,
+                Vec2::new(0.0, -0.6),
+                400.0,
+            );
+            update_ctx.deferred_destroy(update_ctx.entity_data.id);
+        }
+    }
+}
+
+pub fn entity_tnt_def(position: Vec2) -> EntityDef {
+    let sprite_cells = load_sprite_to_cells("assets/sprites/tnt");
+    let entity_cells = EntityCells {
+        cells: sprite_cells.cells,
+        size: IVec2::new(sprite_cells.width as i32, sprite_cells.height as i32),
+    };
+
+    EntityDef::from_cells(
+        position,
+        entity_cells,
+        Some(Box::new(TntEntityBehaviour { fuse: 3.0 })),
+    )
+}
diff --git a/src/content/entities/mod.rs b/src/content/entities/mod.rs
index 652ee6d..0ec45ce 100644
--- a/src/content/entities/mod.rs
+++ b/src/content/entities/mod.rs
@@ -1,3 +1,4 @@
 pub mod entity_bullet_emitter;
 pub mod entity_cube;
 pub mod entity_grenade;
+pub mod entity_tnt;
diff --git a/src/content/materials/mod.rs b/src/content/materials/mod.rs
index 8116565..819ec2a 100644
--- a/src/content/materials/mod.rs
+++ b/src/content/materials/mod.rs
@@ -1,3 +1,5 @@
+use serde::Deserialize;
+
 use crate::sim::cell_manager::sim::{PostUpdateAction, UpdateCtx};
 
 pub mod fire;
@@ -6,7 +8,7 @@ pub mod liquid;
 pub mod powder;
 
 #[repr(u8)]
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Deserialize)]
 pub enum MaterialId {
     Void = 0,
     Sand,
@@ -15,6 +17,7 @@ pub enum MaterialId {
     Fire,
     Smoke,
     Steel,
+    Tnt,
 }
 
 #[repr(u8)]
@@ -35,7 +38,7 @@ pub struct MaterialDef {
     pub sim_update: Option<fn(ctx: &mut UpdateCtx) -> PostUpdateAction>,
 }
 
-static MATERIALS: [MaterialDef; 7] = [
+static MATERIALS: [MaterialDef; 8] = [
     MaterialDef {
         name: "Void",
         color: (0x00, 0x00, 0x00, 0x00),
@@ -53,8 +56,8 @@ static MATERIALS: [MaterialDef; 7] = [
     },
     MaterialDef {
         name: "Wood",
-        color: (0x85, 0x56, 0x1D, 0xFF),
-        density: 50,
+        color: (0x66, 0x39, 0x31, 0xFF),
+        density: 60,
         form: MaterialForm::Solid,
         sim_update: None,
     },
@@ -88,10 +91,17 @@ static MATERIALS: [MaterialDef; 7] = [
         form: MaterialForm::Solid,
         sim_update: None,
     },
+    MaterialDef {
+        name: "TNT",
+        color: (0xA6, 0x34, 0x23, 0xFF),
+        density: 55,
+        form: MaterialForm::Solid,
+        sim_update: None,
+    },
 ];
 
 impl MaterialId {
-    pub const ALL: [MaterialId; 7] = [
+    pub const ALL: [MaterialId; 8] = [
         MaterialId::Void,
         MaterialId::Sand,
         MaterialId::Wood,
@@ -99,6 +109,7 @@ impl MaterialId {
         MaterialId::Fire,
         MaterialId::Smoke,
         MaterialId::Steel,
+        MaterialId::Tnt,
     ];
     #[inline]
     pub fn def(self) -> &'static MaterialDef {
-- 
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