mgecumshooter/esotera

added chunk culling

Commit b2b90cec06a4 · mgecumshooter · 2026-10-21 14:43 +0300

Changeset

b2b90cec06a49145a01e06ce8a503f22d979df44

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Diff

diff --git a/src/chunk/mod.rs b/src/chunk/mod.rs
--- a/src/chunk/mod.rs
+++ b/src/chunk/mod.rs
@@ -43,6 +43,41 @@
         s
     }
 
+    pub fn is_visible(&self, cam: &Camera3D) -> bool {
+	let aabb = self.get_chunk_aabb();
+	let center = Vector3::new(
+	    (aabb.min.x + aabb.max.x) *0.5f32,
+	    (aabb.min.y + aabb.max.y) *0.5f32,
+	    (aabb.min.z + aabb.max.z) *0.5f32,
+	);
+
+	let dx = aabb.max.x - aabb.min.x;
+	let dy = aabb.max.y - aabb.min.y;
+	let dz = aabb.max.z - aabb.min.z;
+
+	let radius = (dx*dx + dy*dy + dz*dz).sqrt() * 0.5;
+
+	
+	let ddx = center.x - cam.position.x;
+	let ddy = center.y - cam.position.y;
+	let ddz = center.z - cam.position.z;
+
+	let dist = (ddx*ddx + ddy*ddy + ddz*ddz).sqrt();
+
+	let fx = cam.target.x - cam.position.x;
+	let fy = cam.target.y - cam.position.y;
+	let fz = cam.target.z - cam.position.z;
+
+	let flen = (fx*fx + fy*fy + fz*fz).sqrt();
+
+	let cos_angle = (ddx*fx + ddy*fy + ddz*fz) / (dist*flen);
+
+	let half_fov = (cam.fovy.to_radians() / 2f32) * 1f32;
+	let angular_margin = (radius / dist).atan();
+
+	cos_angle.acos() <= half_fov + angular_margin
+    }
+
     pub fn generate_mesh(&mut self, rl: &RaylibThread) {
 	let mut vertices: Vec<Vector3> = Vec::new();
 	let mut normals: Vec<Vector3> = Vec::new();
diff --git a/src/main.rs b/src/main.rs
--- a/src/main.rs
+++ b/src/main.rs
@@ -69,6 +69,7 @@
 	plr.update(&rl, &active_chunks);
 	plr.apply_to_camera(&mut cam);
 
+	let fps = rl.get_fps();
 	
         if rend_tex.width() != rl.get_render_width() || rend_tex.height() != rl.get_render_height() {
 	    rend_tex = unsafe { load_depth_tex(rl.get_render_width(), rl.get_render_height()) };
@@ -82,6 +83,9 @@
                 tx.draw_mode3D(cam, |mut d3, _| {
                     d3.draw_grid(100, 1f32);
 		    for chunk in world.chunks.values() {
+			if !chunk.is_visible(&cam) {
+			    continue;
+			}
 			if let Some(ref mesh) = chunk.mesh {
 			    d3.draw_mesh(mesh,
 					 chunk_material.clone(),
@@ -126,6 +130,10 @@
                 20,
                 Color::WHITE,
             );
+	    d.draw_text(
+		&format!("FPS: {}", fps),
+		0, 20, 20, Color::WHITE,
+	    );
         });
     }
 }