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refactor(camera): store orbit target in f64

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Foundation for relative-to-eye rendering: the pivot the camera orbits
must stay precise at large offset-relative coordinates so the derived eye
(which the RTE path subtracts per vertex) is exact. `Camera::target` is
now DVec3 and `eye_f64()` exposes the full-precision eye; `view_proj`
still casts to f32 at the matrix, so behaviour is unchanged for now.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-06-22 20:28:30 +03:00
commit 091b8e1805
4 changed files with 44 additions and 34 deletions
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4
src/app/view.rs
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@ -93,8 +93,8 @@ impl OpenCADStudio {
let aspect = if vh > 0.0 { vw / vh } else { 1.0 };
let half_h = cam.ortho_size();
let half_w = half_h * aspect;
let tx = cam.target.x;
let ty = cam.target.y;
let tx = cam.target.x as f32;
let ty = cam.target.y as f32;
drop(cam);
grips_to_screen_paper(&tab.selected_grips, tx, ty, half_w, half_h, bounds)
} else {