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Feat: UCS icon — animated XYZ axis tripod in viewport bottom-left corner

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Screen-space UCS icon drawn on the existing selection canvas overlay.
Axes are projected from world space so the icon rotates with the camera,
always showing the correct X/Y/Z orientation relative to the drawing plane.
Each axis has its canonical color (X=red, Y=green, Z=blue) with arrowheads.
Icon visibility controlled by show_ucs_icon flag (default on); toggled by
UCSICON ON/OFF command which also updates paper-space viewport entities.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-04-03 19:25:55 +03:00
commit 6a4813ce42
4 changed files with 129 additions and 6 deletions
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22
src/app/view.rs
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@ -58,20 +58,32 @@ impl H7CAD {
vec![]
};
let (vw, vh) = tab.scene.selection.borrow().vp_size;
let vp_bounds = iced::Rectangle { x: 0.0, y: 0.0, width: vw, height: vh };
let grid = if self.show_grid {
let (vw, vh) = tab.scene.selection.borrow().vp_size;
let bounds = iced::Rectangle { x: 0.0, y: 0.0, width: vw, height: vh };
let cam = tab.scene.camera.borrow();
let plane = grid_plane_from_camera(cam.pitch, cam.yaw);
Some(overlay::GridParams {
view_proj: cam.view_proj(bounds),
bounds,
view_proj: cam.view_proj(vp_bounds),
bounds: vp_bounds,
plane,
})
} else {
None
};
overlay::selection_overlay(sel, snap_info, grips, grid)
let ucs_icon = if self.show_ucs_icon && !is_paper {
let cam = tab.scene.camera.borrow();
Some(overlay::UcsIconParams {
view_proj: cam.view_proj(vp_bounds),
bounds: vp_bounds,
})
} else {
None
};
overlay::selection_overlay(sel, snap_info, grips, grid, ucs_icon)
};
let nav = container(overlay::nav_toolbar())