entity behavour, grenades

1 files changed, 64 insertions, 0 deletions

diff --git a/src/sim/entity/entities/entity_grenade.rs b/src/sim/entity/entities/entity_grenade.rs
new file mode 100644
index 0000000..eead416
--- /dev/null
+++ b/src/sim/entity/entities/entity_grenade.rs
@@ -0,0 +1,64 @@
+use glam::{IVec2, Vec2};
+
+use crate::sim::{
+    cell::{cell::Cell, materials::MaterialId},
+    entity::{EntityBehaviour, EntityCells, EntityDef, EntityUpdateCtx, SimCtx},
+    lib::force::apply_explosion,
+};
+
+struct GrenadeEntityBehaviour {
+    pub fuse: f32,
+}
+
+impl EntityBehaviour for GrenadeEntityBehaviour {
+    fn physics_update(
+        &mut self,
+        _update_ctx: &mut EntityUpdateCtx,
+        _ctx: &mut SimCtx,
+        _delta_time: f32,
+    ) -> () {
+    }
+    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,
+                15,
+                Vec2::new(0.0, -0.6),
+                200.0,
+            );
+            update_ctx.deferred_destroy(update_ctx.entity_data.id);
+        }
+    }
+}
+
+pub fn entity_grenade_def(position: Vec2, fuse: f32) -> EntityDef {
+    let w = 3;
+    let h = 3;
+    let mut raw_cells = vec![Cell::void(); (w * h) as usize];
+
+    for x in 0..w {
+        for y in 0..h {
+            let cell_idx = x + y * w;
+            raw_cells[cell_idx as usize] = Cell::from_material(MaterialId::Wood);
+            raw_cells[cell_idx as usize].set_entity(true);
+        }
+    }
+
+    let entity_cells = EntityCells {
+        cells: raw_cells,
+        size: IVec2::new(w, h),
+    };
+
+    EntityDef::from_cells(
+        position,
+        entity_cells,
+        Some(Box::new(GrenadeEntityBehaviour { fuse })),
+    )
+}