From 24886c2752548f1c32ed54968a7bfdf2b1fe38ea Mon Sep 17 00:00:00 2001 From: Kai Stevenson Date: Sun, 16 Aug 2026 00:46:57 -0700 Subject: fire changes + smoke --- src/sim/materials/smoke.rs | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 src/sim/materials/smoke.rs (limited to 'src/sim/materials/smoke.rs') diff --git a/src/sim/materials/smoke.rs b/src/sim/materials/smoke.rs new file mode 100644 index 0000000..68f77ca --- /dev/null +++ b/src/sim/materials/smoke.rs @@ -0,0 +1,24 @@ +use rand::RngExt; + +use crate::sim::{cell::Cell, materials::MaterialId, sim::UpdateCtx}; + +#[inline] +pub fn sim_update(ctx: &mut UpdateCtx) { + // only allow upward movement some of the time to limit movement speed + if ctx.rng.random_range(0.0..1.0) > 0.8 { + if ctx.candidates_swap(&[(0, -1)]) { + return; + } + } + // same for each horizontal direction + if ctx.rng.random_range(0.0..1.0) > 0.8 { + if ctx.candidates_swap(&[(1 - ctx.seqno_parity as i32 * 2, 0)]) { + return; + } + } + if ctx.rng.random_range(0.0..1.0) > 0.8 { + if ctx.candidates_swap(&[(-1 + ctx.seqno_parity as i32 * 2, 0)]) { + return; + } + } +} -- cgit v1.3.1