generating wood caves

1 files changed, 48 insertions, 0 deletions

diff --git a/src/proc_gen/mod.rs b/src/proc_gen/mod.rs
new file mode 100644
index 0000000..8c965fb
--- /dev/null
+++ b/src/proc_gen/mod.rs
@@ -0,0 +1,48 @@
+use fastnoise_lite::FastNoiseLite;
+use glam::{IVec2, Vec2};
+
+use crate::{
+    Config,
+    config::CHUNK_SIZE,
+    content::materials::MaterialId,
+    sim::{cell::Cell, cell_manager::chunk::Chunk},
+};
+
+pub struct WorldGenerator {
+    cave_noise: FastNoiseLite,
+}
+
+impl WorldGenerator {
+    pub fn generate_chunk(&mut self, chunk_position: IVec2) -> Chunk {
+        let mut c = Chunk::void();
+        let position = chunk_position * CHUNK_SIZE;
+        for x in 0..CHUNK_SIZE {
+            for y in 0..CHUNK_SIZE {
+                let cell_position = position.as_vec2() + Vec2::new(x as f32, y as f32);
+                let cnv = self
+                    .cave_noise
+                    .get_noise_2d(cell_position.x, cell_position.y);
+                if cnv < 0.5 {
+                    c.set_cell_at_local_position(
+                        x as u8,
+                        y as u8,
+                        Cell::from_material(MaterialId::Wood),
+                    );
+                }
+            }
+        }
+        c
+    }
+
+    pub fn update_params(&mut self, config: &Config) {
+        self.cave_noise = FastNoiseLite::with_seed(config.proc_gen_seed + 50);
+        self.cave_noise.set_frequency(Some(config.cave_noise_freq));
+    }
+
+    pub fn new(config: &Config) -> Self {
+        let cave_noise = FastNoiseLite::with_seed(config.proc_gen_seed + 50);
+        let mut wg = WorldGenerator { cave_noise };
+        wg.update_params(config);
+        wg
+    }
+}