From bde8936ad0bbd26570080be10ccde0a16ad29d29 Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Mon, 19 Oct 2026 02:04:10 +0300
Subject: [PATCH] move the bevel gear to the center

---
 src/bevel_gear.rs | 21 +++++++++++----------
 src/lib.rs        |  4 ++--
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/src/bevel_gear.rs b/src/bevel_gear.rs
index e203372..f3a8d53 100644
--- a/src/bevel_gear.rs
+++ b/src/bevel_gear.rs
@@ -67,8 +67,8 @@ pub enum BevelGearCap {
 
 #[derive(Debug, Clone, Copy)]
 pub struct BevelGearVisual {
-	pub inner_distance: f32,
-	pub outer_distance: f32,
+	pub pad_in: f32,
+	pub pad_out: f32,
 }
 
 pub fn make_mesh(
@@ -76,22 +76,23 @@ pub fn make_mesh(
 	visual: &BevelGearVisual,
 	shape: &BevelGearShape,
 ) -> MeshIndexed<Vec3> {
-	let inner_scale = visual.inner_distance / desc.pitch_distance();
-	let outer_scale = visual.outer_distance / desc.pitch_distance();
+	let inner_scale = (desc.pitch_distance() - visual.pad_in) / desc.pitch_distance();
+	let outer_scale = (desc.pitch_distance() + visual.pad_out) / desc.pitch_distance();
 
 	let sides = shape.points.len();
 	let mut mesh = MeshIndexed::new();
 	mesh.vertices.reserve_exact(2 * sides + 2);
 	mesh.faces.reserve_exact(4 * sides);
 	for pt in shape.to_points() {
-		let pt = vec3(pt.x, pt.y, desc.pitch_distance());
-		mesh.vertices.extend([inner_scale * pt, outer_scale * pt]);
+		let pt = vec3(pt.x, pt.y, 0.);
+		mesh.vertices.extend([
+			outer_scale * pt - visual.pad_out * Vec3::Z,
+			inner_scale * pt + visual.pad_in * Vec3::Z,
+		]);
 	}
 	let caps = mesh.vertices.len();
-	mesh.vertices.extend([
-		vec3(0., 0., visual.inner_distance),
-		vec3(0., 0., visual.outer_distance),
-	]);
+	mesh.vertices
+		.extend([vec3(0., 0., -visual.pad_out), vec3(0., 0., visual.pad_in)]);
 	for k in 0..sides {
 		let base1 = 2 * k;
 		let base2 = 2 * ((k + 1) % sides);
diff --git a/src/lib.rs b/src/lib.rs
index db011d3..9a92840 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -122,8 +122,8 @@ impl Core {
 		let bevel_gear_mesh = bevel_gear::make_mesh(
 			&bevel_gear_desc,
 			&bevel_gear::BevelGearVisual {
-				inner_distance: bevel_gear_desc.pitch_distance() - 4.0,
-				outer_distance: bevel_gear_desc.pitch_distance(),
+				pad_in: 4.,
+				pad_out: 0.,
 			},
 			&bevel_gear::BevelGearShape::new_blank(&bevel_gear_desc, 60),
 		)