feat(viewcube): add compass ring, cardinals, and nav controls
Build the ViewCube out into a full navigation widget: - Compass ring painted in the cube's ground plane (z = base) so it reads as a ground compass and foreshortens with the view. - N/E/S/W cardinals painted flat onto the ring band; clicking one snaps to that side elevation. Added S/W glyphs to the bitmap atlas. - Home button (top-down view), roll arrows (90° roll about the view axis), and four nudge triangles (90° tip/spin) as SVG iced controls laid out around the cube. New home.svg. - WCS / named-UCS selector under the cube, switching the active UCS. The cube hit area now shares one stack with the control buttons, so a click on a button is caught by the button while a click on the cube falls through. Face clicks snap to the highlighted region rather than a cursor position the viewport's move handler can overwrite. Camera gains home_view / roll_by / nudge_90; floating viewports drive the same ops through mutate_active_viewport_camera, which re-encodes the result to the stored view direction + twist. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven
parent
6c4b981424
commit
f00c48bebb
9 changed files with 633 additions and 40 deletions
|
|
@ -19,6 +19,37 @@ pub const VIEWCUBE_PX: u32 = 120;
|
|||
pub const VIEWCUBE_SCALE: f32 = 0.36;
|
||||
pub const VIEWCUBE_DRAW_PX: f32 = VIEWCUBE_PX as f32 * VIEWCUBE_SCALE * 2.0;
|
||||
pub const VIEWCUBE_PAD: f32 = 12.0;
|
||||
/// The cube centre is inset from the screen corner by this multiple of the
|
||||
/// cube half-size, leaving room for the compass ring and the nav controls
|
||||
/// (home / roll / nudge) drawn around it.
|
||||
pub const NAV_INSET_F: f32 = 2.2;
|
||||
/// Side of the whole nav widget (cube + compass ring + controls) in pixels.
|
||||
pub const VIEWCUBE_REGION_PX: f32 = VIEWCUBE_DRAW_PX * NAV_INSET_F;
|
||||
/// Z height of the compass ring + cardinals in cube-local space. The cube
|
||||
/// spans ±1, so −1 parks the ring at the cube's base — it sits *under* the
|
||||
/// cube in 3D views and reads as a ground compass.
|
||||
const RING_Z: f32 = -1.0;
|
||||
/// Horizontal radius of the N/E/S/W cardinal letters — the ring's mid-line, so
|
||||
/// they sit painted on the ring band.
|
||||
const R_CARD: f32 = 1.57;
|
||||
|
||||
/// Compass cardinal directions, mapped to a side-face snap when clicked.
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
pub enum Cardinal {
|
||||
North,
|
||||
East,
|
||||
South,
|
||||
West,
|
||||
}
|
||||
|
||||
/// 90° view nudge directions (tip the cube up/down or spin it left/right).
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
pub enum NudgeDir {
|
||||
Up,
|
||||
Down,
|
||||
Left,
|
||||
Right,
|
||||
}
|
||||
|
||||
const FACE_LABELS: [&str; 6] = ["TOP", "BOTTOM", "FRONT", "BACK", "RIGHT", "LEFT"];
|
||||
const FACE_CENTERS: [[f32; 3]; 6] = [
|
||||
|
|
@ -172,8 +203,10 @@ impl CubeUniforms {
|
|||
) -> Self {
|
||||
let (hw, hh) = (vp_w as f32 * 0.5, vp_h as f32 * 0.5);
|
||||
let cube_half = cube_px as f32 * VIEWCUBE_SCALE;
|
||||
let cx = hw - cube_half - VIEWCUBE_PAD;
|
||||
let cy = hh - cube_half - VIEWCUBE_PAD;
|
||||
// Inset the cube centre to leave room for the ring + controls.
|
||||
let inset = cube_half * NAV_INSET_F;
|
||||
let cx = hw - inset - VIEWCUBE_PAD;
|
||||
let cy = hh - inset - VIEWCUBE_PAD;
|
||||
let view_proj = Mat4::orthographic_rh(-hw, hw, -hh, hh, -2000.0, 2000.0)
|
||||
* Mat4::from_translation(Vec3::new(cx, cy, 0.0))
|
||||
* Mat4::from_scale(Vec3::splat(cube_px as f32 * VIEWCUBE_SCALE));
|
||||
|
|
@ -197,10 +230,11 @@ const GLYPH_H: usize = 7;
|
|||
const CELL_W: usize = 6;
|
||||
const CELL_H: usize = 8;
|
||||
const ATLAS_COLS: usize = 8;
|
||||
const ATLAS_ROWS: usize = 2;
|
||||
const ATLAS_ROWS: usize = 3;
|
||||
const MAX_LABEL_CHARS: usize = 6;
|
||||
const LABEL_COUNT: usize = 6;
|
||||
const MAX_GLYPHS: usize = MAX_LABEL_CHARS * LABEL_COUNT;
|
||||
// Face labels + the four compass cardinals (one glyph each).
|
||||
const MAX_GLYPHS: usize = MAX_LABEL_CHARS * LABEL_COUNT + 4;
|
||||
const MAX_VERTS: usize = MAX_GLYPHS * 6;
|
||||
|
||||
#[repr(C)]
|
||||
|
|
@ -249,6 +283,8 @@ fn glyph_index(c: char) -> Option<usize> {
|
|||
'P' => Some(13),
|
||||
'R' => Some(14),
|
||||
'T' => Some(15),
|
||||
'S' => Some(16),
|
||||
'W' => Some(17),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
|
@ -303,6 +339,12 @@ fn glyph_rows(c: char) -> [u8; GLYPH_H] {
|
|||
'T' => [
|
||||
0b11111, 0b00100, 0b00100, 0b00100, 0b00100, 0b00100, 0b00100,
|
||||
],
|
||||
'S' => [
|
||||
0b01111, 0b10000, 0b10000, 0b01110, 0b00001, 0b00001, 0b11110,
|
||||
],
|
||||
'W' => [
|
||||
0b10001, 0b10001, 0b10001, 0b10101, 0b10101, 0b11011, 0b10001,
|
||||
],
|
||||
_ => [0; GLYPH_H],
|
||||
}
|
||||
}
|
||||
|
|
@ -312,7 +354,7 @@ fn build_atlas() -> (Vec<u8>, u32, u32) {
|
|||
let h = (ATLAS_ROWS * CELL_H) as u32;
|
||||
let mut data = vec![0u8; (w * h) as usize];
|
||||
let glyphs = [
|
||||
'A', 'B', 'C', 'E', 'F', 'G', 'H', 'I', 'K', 'L', 'M', 'N', 'O', 'P', 'R', 'T',
|
||||
'A', 'B', 'C', 'E', 'F', 'G', 'H', 'I', 'K', 'L', 'M', 'N', 'O', 'P', 'R', 'T', 'S', 'W',
|
||||
];
|
||||
for (i, &ch) in glyphs.iter().enumerate() {
|
||||
let col = i % ATLAS_COLS;
|
||||
|
|
@ -534,11 +576,12 @@ impl ViewCubeText {
|
|||
) {
|
||||
let (vw, vh) = (vp_w as f32, vp_h as f32);
|
||||
let cube_half = cube_px as f32 * VIEWCUBE_SCALE;
|
||||
let inset = cube_half * NAV_INSET_F;
|
||||
let (hw, hh) = (vw * 0.5, vh * 0.5);
|
||||
let view_proj = Mat4::orthographic_rh(-hw, hw, -hh, hh, -2000.0, 2000.0)
|
||||
* Mat4::from_translation(Vec3::new(
|
||||
hw - cube_half - VIEWCUBE_PAD,
|
||||
hh - cube_half - VIEWCUBE_PAD,
|
||||
hw - inset - VIEWCUBE_PAD,
|
||||
hh - inset - VIEWCUBE_PAD,
|
||||
0.0,
|
||||
))
|
||||
* Mat4::from_scale(Vec3::splat(cube_px as f32 * VIEWCUBE_SCALE));
|
||||
|
|
@ -629,6 +672,50 @@ impl ViewCubeText {
|
|||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// ── Compass cardinals (N / E / S / W) ──────────────────────────────
|
||||
// Painted flat onto the ring band (z = RING_Z) so they foreshorten with
|
||||
// the ring and read upright in plan. Local axes u = +X, v = +Y give
|
||||
// u × v = +Z → never mirrored when seen from above.
|
||||
const CARD_GW: f32 = 0.16; // glyph size in cube-local units
|
||||
const CARD_GH: f32 = 0.22;
|
||||
let cardinals = [
|
||||
('N', Vec3::new(0.0, 1.0, 0.0)),
|
||||
('E', Vec3::new(1.0, 0.0, 0.0)),
|
||||
('S', Vec3::new(0.0, -1.0, 0.0)),
|
||||
('W', Vec3::new(-1.0, 0.0, 0.0)),
|
||||
];
|
||||
for (ch, dir) in cardinals {
|
||||
let Some(gi) = glyph_index(ch) else {
|
||||
continue;
|
||||
};
|
||||
let center = Vec3::new(dir.x * R_CARD, dir.y * R_CARD, RING_Z);
|
||||
// Dim a cardinal whose ring point sits behind the cube.
|
||||
let alpha = if cam_rotation.transform_point3(center).z >= -0.15 {
|
||||
1.0
|
||||
} else {
|
||||
0.5
|
||||
};
|
||||
let color = [1.0, 1.0, 1.0, alpha];
|
||||
let (u0, v0, u1, v1) = glyph_uv(gi, self.atlas_w, self.atlas_h);
|
||||
let corner = |lx: f32, ly: f32| center + Vec3::X * lx + Vec3::Y * ly;
|
||||
let tl = project(corner(-CARD_GW * 0.5, CARD_GH * 0.5));
|
||||
let tr = project(corner(CARD_GW * 0.5, CARD_GH * 0.5));
|
||||
let br = project(corner(CARD_GW * 0.5, -CARD_GH * 0.5));
|
||||
let bl = project(corner(-CARD_GW * 0.5, -CARD_GH * 0.5));
|
||||
if let (Some(tl), Some(tr), Some(br), Some(bl)) = (tl, tr, br, bl) {
|
||||
let mk = |pos: [f32; 2], uv: [f32; 2]| TextVertex { pos, uv, color };
|
||||
verts.push(mk(tl, [u0, v0]));
|
||||
verts.push(mk(tr, [u1, v0]));
|
||||
verts.push(mk(br, [u1, v1]));
|
||||
verts.push(mk(tl, [u0, v0]));
|
||||
verts.push(mk(br, [u1, v1]));
|
||||
verts.push(mk(bl, [u0, v1]));
|
||||
}
|
||||
if verts.len() >= self.vertex_capacity as usize {
|
||||
break;
|
||||
}
|
||||
}
|
||||
self.vertex_count = verts.len() as u32;
|
||||
if self.vertex_count > 0 {
|
||||
queue.write_buffer(&self.vertex_buffer, 0, bytemuck::cast_slice(&verts));
|
||||
|
|
@ -918,9 +1005,42 @@ pub fn build_geometry() -> (Vec<CubeVertex>, Vec<u32>) {
|
|||
&mut is,
|
||||
);
|
||||
}
|
||||
build_ring(&mut vs, &mut is);
|
||||
(vs, is)
|
||||
}
|
||||
|
||||
/// A flat compass ring in the cube's local XY plane (the ground plane),
|
||||
/// surrounding the cube. Pushed with a sentinel `region_f = -1.0` so the
|
||||
/// shader never highlights it on hover, and a constant grey colour.
|
||||
fn build_ring(vs: &mut Vec<CubeVertex>, is: &mut Vec<u32>) {
|
||||
const SEG: usize = 64;
|
||||
const R0: f32 = 1.40; // inner radius — clear gap to the cube faces
|
||||
const R1: f32 = 1.74; // outer radius — wider, thicker band
|
||||
const RING_RGB: [f32; 3] = [0.22, 0.23, 0.26];
|
||||
for s in 0..SEG {
|
||||
let a0 = s as f32 / SEG as f32 * std::f32::consts::TAU;
|
||||
let a1 = (s + 1) as f32 / SEG as f32 * std::f32::consts::TAU;
|
||||
let (c0, s0) = (a0.cos(), a0.sin());
|
||||
let (c1, s1) = (a1.cos(), a1.sin());
|
||||
let quad = [
|
||||
[c0 * R0, s0 * R0, RING_Z],
|
||||
[c1 * R0, s1 * R0, RING_Z],
|
||||
[c1 * R1, s1 * R1, RING_Z],
|
||||
[c0 * R1, s0 * R1, RING_Z],
|
||||
];
|
||||
let base = vs.len() as u32;
|
||||
for pos in quad {
|
||||
vs.push(CubeVertex {
|
||||
pos,
|
||||
normal: [0.0, 0.0, 1.0],
|
||||
color: RING_RGB,
|
||||
region_f: -1.0,
|
||||
});
|
||||
}
|
||||
is.extend_from_slice(&[base, base + 1, base + 2, base, base + 2, base + 3]);
|
||||
}
|
||||
}
|
||||
|
||||
pub fn region_centroids() -> [[f32; 3]; NUM_REGIONS] {
|
||||
let m = (F + E) * 0.5;
|
||||
[
|
||||
|
|
@ -1203,8 +1323,9 @@ pub fn hit_test(
|
|||
cube_px: u32,
|
||||
) -> Option<CubeRegion> {
|
||||
let half = cube_px as f32 * VIEWCUBE_SCALE;
|
||||
let cx = vp_w - half - VIEWCUBE_PAD;
|
||||
let cy = half + VIEWCUBE_PAD;
|
||||
let inset = half * NAV_INSET_F;
|
||||
let cx = vp_w - inset - VIEWCUBE_PAD;
|
||||
let cy = inset + VIEWCUBE_PAD;
|
||||
if (mx - cx).abs() > half || (my - cy).abs() > half {
|
||||
return None;
|
||||
}
|
||||
|
|
@ -1212,8 +1333,8 @@ pub fn hit_test(
|
|||
let (hw, hh) = (vp_w * 0.5, vp_h * 0.5);
|
||||
let vp = Mat4::orthographic_rh(-hw, hw, -hh, hh, -2000.0, 2000.0)
|
||||
* Mat4::from_translation(Vec3::new(
|
||||
hw - half - VIEWCUBE_PAD,
|
||||
hh - half - VIEWCUBE_PAD,
|
||||
hw - inset - VIEWCUBE_PAD,
|
||||
hh - inset - VIEWCUBE_PAD,
|
||||
0.0,
|
||||
))
|
||||
* Mat4::from_scale(Vec3::splat(cube_px as f32 * VIEWCUBE_SCALE));
|
||||
|
|
@ -1259,3 +1380,69 @@ pub fn hover_id(
|
|||
) -> Option<usize> {
|
||||
hit_test(mx, my, vp_w, vp_h, cam_rotation, cube_px).map(|r| r.id())
|
||||
}
|
||||
|
||||
impl Cardinal {
|
||||
/// The side-elevation face a compass letter snaps to when clicked.
|
||||
pub fn face_region(self) -> CubeRegion {
|
||||
CubeRegion::Face(match self {
|
||||
Cardinal::North => FACE_BACK,
|
||||
Cardinal::South => FACE_FRONT,
|
||||
Cardinal::East => FACE_RIGHT,
|
||||
Cardinal::West => FACE_LEFT,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns the compass cardinal under (mx, my), or None. Projects each of the
|
||||
/// four ring letters and accepts the nearest within a small pixel radius — the
|
||||
/// caller tries the cube body first, so this only fires out on the ring.
|
||||
pub fn hit_test_cardinal(
|
||||
mx: f32,
|
||||
my: f32,
|
||||
vp_w: f32,
|
||||
vp_h: f32,
|
||||
cam_rotation: Mat4,
|
||||
cube_px: u32,
|
||||
) -> Option<Cardinal> {
|
||||
let half = cube_px as f32 * VIEWCUBE_SCALE;
|
||||
let inset = half * NAV_INSET_F;
|
||||
let cx = vp_w - inset - VIEWCUBE_PAD;
|
||||
let cy = inset + VIEWCUBE_PAD;
|
||||
if (mx - cx).abs() > inset || (my - cy).abs() > inset {
|
||||
return None;
|
||||
}
|
||||
|
||||
let (hw, hh) = (vp_w * 0.5, vp_h * 0.5);
|
||||
let vp = Mat4::orthographic_rh(-hw, hw, -hh, hh, -2000.0, 2000.0)
|
||||
* Mat4::from_translation(Vec3::new(
|
||||
hw - inset - VIEWCUBE_PAD,
|
||||
hh - inset - VIEWCUBE_PAD,
|
||||
0.0,
|
||||
))
|
||||
* Mat4::from_scale(Vec3::splat(cube_px as f32 * VIEWCUBE_SCALE));
|
||||
|
||||
let dirs = [
|
||||
(Cardinal::North, Vec3::new(0.0, 1.0, 0.0)),
|
||||
(Cardinal::East, Vec3::new(1.0, 0.0, 0.0)),
|
||||
(Cardinal::South, Vec3::new(0.0, -1.0, 0.0)),
|
||||
(Cardinal::West, Vec3::new(-1.0, 0.0, 0.0)),
|
||||
];
|
||||
let thresh = (half * 0.34).powi(2);
|
||||
let (mut best, mut best_d) = (None, f32::MAX);
|
||||
for (card, dir) in dirs {
|
||||
let anchor = Vec3::new(dir.x * R_CARD, dir.y * R_CARD, RING_Z);
|
||||
let world = cam_rotation.transform_point3(anchor);
|
||||
let clip = vp * Vec4::new(world.x, world.y, world.z, 1.0);
|
||||
if clip.w.abs() < 1e-6 {
|
||||
continue;
|
||||
}
|
||||
let sx = (clip.x / clip.w + 1.0) * 0.5 * vp_w;
|
||||
let sy = (1.0 - clip.y / clip.w) * 0.5 * vp_h;
|
||||
let d = (sx - mx).powi(2) + (sy - my).powi(2);
|
||||
if d < thresh && d < best_d {
|
||||
best_d = d;
|
||||
best = Some(card);
|
||||
}
|
||||
}
|
||||
best
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue