AI_Assistant/cad-editor
Watch
1
0
Fork
You've already forked cad-editor
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fix(snap): shrink OSNAP pickup radius to ¼ of crosshair arm

Browse source 
OSNAP registered snapping over the full crosshair-arm radius (60 px),
making it too easy to snap and leaving little room to click just outside
a snap point. Split out a dedicated osnap_radius_px (¼ of the arm) used
only for object-snap matching; tracking, polar and extension pickup keep
the larger snap_radius_px.

Closes #108

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-06-17 04:56:42 +03:00
commit d041bea32a
1 changed files with 10 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/snap/mod.rs
View file

@ -87,8 +87,11 @@ pub struct Snapper {
pub enabled: HashSet<SnapType>,
/// World-space grid spacing.
pub grid_spacing: f32,
/// Pixel-radius threshold.
/// Pixel-radius threshold for tracking / polar / extension pickup.
pub snap_radius_px: f32,
/// Pixel-radius threshold for object snapping (OSNAP). Kept smaller than
/// `snap_radius_px` so it is easy to click just outside a snap point.
pub osnap_radius_px: f32,
/// Object Snap Tracking on/off (F11).
pub otrack_enabled: bool,
/// Acquired OST points (world XZ, Y=0 plane).
@ -114,6 +117,7 @@ impl Default for Snapper {
enabled,
grid_spacing: 1.0,
snap_radius_px: CROSSHAIR_ARM,
osnap_radius_px: CROSSHAIR_ARM * 0.25,
otrack_enabled: false,
tracking_points: Vec::new(),
last_snap_world: None,
@ -302,6 +306,7 @@ impl Snapper {
},
grid_spacing: self.grid_spacing,
snap_radius_px: self.snap_radius_px,
osnap_radius_px: self.osnap_radius_px,
otrack_enabled: false,
tracking_points: Vec::new(),
last_snap_world: None,
@ -323,7 +328,7 @@ impl Snapper {
return None;
}
let mut best: Option<SnapResult> = None;
let mut best_d2 = self.snap_radius_px * self.snap_radius_px;
let mut best_d2 = self.osnap_radius_px * self.osnap_radius_px;
// World-space snap radius — derived from the view scale so wires whose
// entire extent is clearly outside the snap circle can be skipped cheaply
@ -333,7 +338,7 @@ impl Snapper {
let world_snap_r = {
let s = view_proj.col(0).x.abs() * bounds.width * 0.5;
if s > 1e-6 {
self.snap_radius_px / s
self.osnap_radius_px / s
} else {
f32::MAX
}
@ -514,7 +519,7 @@ impl Snapper {
p0 - p1,
view_proj,
bounds,
self.snap_radius_px,
self.osnap_radius_px,
) {
try_pt(ext, SnapType::Extension);
}
@ -529,7 +534,7 @@ impl Snapper {
p_last - p_prev,
view_proj,
bounds,
self.snap_radius_px,
self.osnap_radius_px,
) {
try_pt(ext, SnapType::Extension);
}