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feat(client_web): checkers slide animation

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This commit is contained in:
Henri Bourcereau 2026-04-09 20:17:21 +02:00
parent e7c0a390e3
commit 4a07c41f7c
5 changed files with 151 additions and 33 deletions
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19
client_web/assets/style.css
View file

@ -999,6 +999,25 @@ body {
letter-spacing: 0.14em;
}
/* ── §4a — Checker slide animation ─────────────────────────────────── */
@keyframes checker-slide-in {
from { transform: translate(var(--slide-dx, 0px), var(--slide-dy, 0px)); }
to { transform: none; }
}
/* Only the arriving (outermost) checker animates; --slide-dx/dy are set
as inline styles on that element at render time, so no flash occurs. */
.checker.arriving {
animation: checker-slide-in 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
/* Lift the field that owns an arriving checker above its siblings so the
checker doesn't slide under adjacent fields (isolation:isolate traps
z-index within each field's stacking context). */
.field:has(.checker.arriving) {
isolation: auto;
z-index: 10;
position: relative;
}
/* ── Checker lift on selected field (§4b) ───────────────────────────── */
.field.selected .checker-stack {
transform: translateY(-5px);

28
client_web/src/app.rs
View file

@ -13,6 +13,7 @@ use crate::i18n::I18nContextProvider;
use crate::trictrac::backend::TrictracBackend;
use crate::trictrac::bot_local::bot_decide;
use crate::trictrac::types::{GameDelta, JanEntry, PlayerAction, ScoredEvent, SerTurnStage, ViewState};
use trictrac_store::CheckerMove;
use std::collections::VecDeque;
@ -35,6 +36,8 @@ pub struct GameUiState {
/// Points scored by this player in the transition to this state (if any).
pub my_scored_event: Option<ScoredEvent>,
pub opp_scored_event: Option<ScoredEvent>,
/// Checker moves to animate on this render. None when board is unchanged.
pub last_moves: Option<(CheckerMove, CheckerMove)>,
}
/// Reason the UI is paused waiting for the player to click Continue.
@ -272,6 +275,7 @@ pub fn App() -> impl IntoView {
pause_reason: None,
my_scored_event: None,
opp_scored_event: None,
last_moves: compute_last_moves(&prev_vs, &vs),
},
pending,
screen,
@ -338,6 +342,7 @@ async fn run_local_bot_game(
pause_reason: None,
my_scored_event: None,
opp_scored_event: None,
last_moves: None,
}));
loop {
@ -361,6 +366,7 @@ async fn run_local_bot_game(
pause_reason: None,
my_scored_event: scored,
opp_scored_event: opp_scored,
last_moves: compute_last_moves(&prev_vs, &vs),
}));
}
Some(NetCommand::PlayVsBot) => return true,
@ -389,6 +395,7 @@ async fn run_local_bot_game(
pause_reason: None,
my_scored_event: None,
opp_scored_event: None,
last_moves: compute_last_moves(&prev_vs, &vs),
},
pending,
screen,
@ -399,6 +406,22 @@ async fn run_local_bot_game(
}
}
/// Returns the checker moves to animate when the board changed between two ViewStates.
/// Returns `None` when the board is unchanged or no real moves were recorded.
fn compute_last_moves(prev: &ViewState, next: &ViewState) -> Option<(CheckerMove, CheckerMove)> {
if prev.board == next.board {
return None;
}
let (m1, m2) = next.dice_moves;
if m1 == CheckerMove::default() && m2 == CheckerMove::default() {
// Relies on the engine invariant: dice_moves is updated atomically with the board
// change in the Move event handler. Any future engine path that mutates the board
// without setting dice_moves would bypass this guard and replay stale animation.
return None;
}
Some((m1, m2))
}
/// Computes a scoring event for `player_id` by comparing the previous and next
/// ViewState. Returns `None` when no points changed for that player.
fn compute_scored_event(prev: &ViewState, next: &ViewState, player_id: u16) -> Option<ScoredEvent> {
@ -471,7 +494,9 @@ fn push_or_show(
..new_state.clone()
});
});
screen.set(Screen::Playing(new_state));
// Animation belongs to the buffered confirmation step; clear it on the
// fallback live state so it doesn't fire again after the queue drains.
screen.set(Screen::Playing(GameUiState { last_moves: None, ..new_state }));
} else {
// No pause: show scoring directly on the live state.
screen.set(Screen::Playing(GameUiState {
@ -528,6 +553,7 @@ mod tests {
scores: [score(), score()],
dice,
dice_jans: Vec::new(),
dice_moves: (CheckerMove::default(), CheckerMove::default()),
}
}

130
client_web/src/components/board.rs
View file

@ -1,8 +1,8 @@
use leptos::prelude::*;
use trictrac_store::CheckerMove;
use crate::trictrac::types::{SerTurnStage, ViewState};
use super::die::Die;
use crate::trictrac::types::{SerTurnStage, ViewState};
/// Field numbers in visual display order (left-to-right for each quarter), white's perspective.
const TOP_LEFT_W: [u8; 6] = [13, 14, 15, 16, 17, 18];
@ -20,17 +20,21 @@ const BOT_RIGHT_B: [u8; 6] = [18, 17, 16, 15, 14, 13];
/// Returns true when `field_num` is the rest corner for this perspective.
#[allow(dead_code)]
fn is_rest_corner(field_num: u8, is_white: bool) -> bool {
if is_white { field_num == 12 } else { field_num == 13 }
if is_white {
field_num == 12
} else {
field_num == 13
}
}
/// Zone CSS class for a field number (field coordinates are always White's 1-24).
fn field_zone_class(field_num: u8) -> &'static str {
match field_num {
1..=6 => "zone-petit",
7..=12 => "zone-grand",
1..=6 => "zone-petit",
7..=12 => "zone-grand",
13..=18 => "zone-retour",
19..=24 => "zone-dernier",
_ => "",
_ => "",
}
}
@ -39,11 +43,20 @@ fn bar_matched_dice_used(staged: &[(u8, u8)], dice: (u8, u8)) -> (bool, bool) {
let mut d0 = false;
let mut d1 = false;
for &(from, to) in staged {
let dist = if from < to { to.saturating_sub(from) } else { from.saturating_sub(to) };
if !d0 && dist == dice.0 { d0 = true; }
else if !d1 && dist == dice.1 { d1 = true; }
else if !d0 { d0 = true; }
else { d1 = true; }
let dist = if from < to {
to.saturating_sub(from)
} else {
from.saturating_sub(to)
};
if !d0 && dist == dice.0 {
d0 = true;
} else if !d1 && dist == dice.1 {
d1 = true;
} else if !d0 {
d0 = true;
} else {
d1 = true;
}
}
(d0, d1)
}
@ -72,7 +85,8 @@ fn displayed_value(
/// Fields whose checkers may be selected as the next origin given already-staged moves.
fn valid_origins_for(seqs: &[(CheckerMove, CheckerMove)], staged: &[(u8, u8)]) -> Vec<u8> {
let mut v: Vec<u8> = match staged.len() {
0 => seqs.iter()
0 => seqs
.iter()
.map(|(m1, _)| m1.get_from() as u8)
.filter(|&f| f != 0)
.collect(),
@ -103,28 +117,33 @@ fn field_center(f: usize, is_white: bool) -> Option<(f32, f32)> {
match f {
13..=18 => (f - 13, false, true),
19..=24 => (f - 19, true, true),
7..=12 => (12 - f, false, false),
1..=6 => (6 - f, true, false),
_ => return None,
7..=12 => (12 - f, false, false),
1..=6 => (6 - f, true, false),
_ => return None,
}
} else {
match f {
1..=6 => (f - 1, false, true),
7..=12 => (f - 7, true, true),
1..=6 => (f - 1, false, true),
7..=12 => (f - 7, true, true),
19..=24 => (24 - f, false, false),
13..=18 => (18 - f, true, false),
_ => return None,
_ => return None,
}
};
// Left-quarter field i center x: 4(pad) + i*62 + 30(half field) = 34 + 62i
// Right-quarter: 4 + 370(quarter) + 4(gap) + 68(bar) + 4(gap) + i*62 + 30 = 480 + 62i
let x = if right { 480.0 + qi as f32 * 62.0 } else { 34.0 + qi as f32 * 62.0 };
let x = if right {
480.0 + qi as f32 * 62.0
} else {
34.0 + qi as f32 * 62.0
};
// Top row triangle base (wide end) ≈ y=30; bot row triangle base ≈ y=358.
// (Top base: 4pad + 4field-pad + 20half-checker ≈ 28; Bot base: 388 − 4pad − 4field-pad − 20 ≈ 360)
let y = if top { 30.0 } else { 358.0 };
Some((x, y))
}
/// SVG `<g>` element drawing one arrow (shadow + gold) from `fp` to `tp`.
fn arrow_svg(fp: (f32, f32), tp: (f32, f32)) -> AnyView {
let (x1, y1) = fp;
@ -153,15 +172,21 @@ fn arrow_svg(fp: (f32, f32), tp: (f32, f32)) -> AnyView {
let bary = y2 - ny * ah;
let pts = format!(
"{:.1},{:.1} {:.1},{:.1} {:.1},{:.1}",
x2, y2,
bx + px * aw, bary + py * aw,
bx - px * aw, bary - py * aw,
x2,
y2,
bx + px * aw,
bary + py * aw,
bx - px * aw,
bary - py * aw,
);
let shadow_pts = format!(
"{:.1},{:.1} {:.1},{:.1} {:.1},{:.1}",
x2, y2,
bx + px * (aw + 1.5), bary + py * (aw + 1.5),
bx - px * (aw + 1.5), bary - py * (aw + 1.5),
x2,
y2,
bx + px * (aw + 1.5),
bary + py * (aw + 1.5),
bx - px * (aw + 1.5),
bary - py * (aw + 1.5),
);
view! {
@ -187,9 +212,14 @@ fn arrow_svg(fp: (f32, f32), tp: (f32, f32)) -> AnyView {
/// Valid destinations for a selected origin given already-staged moves.
/// May include 0 (exit); callers handle that case.
fn valid_dests_for(seqs: &[(CheckerMove, CheckerMove)], staged: &[(u8, u8)], origin: u8) -> Vec<u8> {
fn valid_dests_for(
seqs: &[(CheckerMove, CheckerMove)],
staged: &[(u8, u8)],
origin: u8,
) -> Vec<u8> {
let mut v: Vec<u8> = match staged.len() {
0 => seqs.iter()
0 => seqs
.iter()
.filter(|(m1, _)| m1.get_from() as u8 == origin)
.map(|(m1, _)| m1.get_to() as u8)
.collect(),
@ -222,11 +252,17 @@ pub fn Board(
/// All valid two-move sequences for this turn (empty when not in move stage).
valid_sequences: Vec<(CheckerMove, CheckerMove)>,
/// Dice to display in the center bars; None means dice not yet rolled (cups shown upright).
#[prop(default = None)] bar_dice: Option<(u8, u8)>,
#[prop(default = None)]
bar_dice: Option<(u8, u8)>,
/// Whether we're in the move stage (determines used/unused die appearance).
#[prop(default = false)] bar_is_move: bool,
#[prop(default = false)]
bar_is_move: bool,
/// Whether the dice are a double (golden glow).
#[prop(default = false)] bar_is_double: bool,
#[prop(default = false)]
bar_is_double: bool,
/// Checker moves to animate on mount (None when board unchanged).
#[prop(default = None)]
last_moves: Option<(CheckerMove, CheckerMove)>,
) -> impl IntoView {
let board = view_state.board;
let is_move_stage = view_state.active_mp_player == Some(player_id)
@ -245,12 +281,12 @@ pub fn Board(
let exit_field_test: fn(u8) -> bool;
if is_white {
let in_exit: i8 = board_snapshot[18..24].iter().map(|&v| v.max(0)).sum();
let total: i8 = board_snapshot.iter().map(|&v| v.max(0)).sum();
let total: i8 = board_snapshot.iter().map(|&v| v.max(0)).sum();
all_in_exit = total > 0 && in_exit == total;
exit_field_test = |f| matches!(f, 19..=24);
} else {
let in_exit: i8 = board_snapshot[0..6].iter().map(|&v| (-v).max(0)).sum();
let total: i8 = board_snapshot.iter().map(|&v| (-v).max(0)).sum();
let total: i8 = board_snapshot.iter().map(|&v| (-v).max(0)).sum();
all_in_exit = total > 0 && in_exit == total;
exit_field_test = |f| matches!(f, 1..=6);
}
@ -268,8 +304,23 @@ pub fn Board(
} else {
None
};
// §4a — slide delta for the arriving checker at this field.
// Computed once per field at render time; Option<(f32,f32)> is Copy.
let slide_delta: Option<(f32, f32)> = last_moves.and_then(|(m1, m2)| {
[m1, m2].iter().find_map(|m| {
if m.get_to() != field_num as usize || m.get_from() == m.get_to() {
return None;
}
let (fx, fy) = field_center(m.get_from(), is_white)?;
let (tx, ty) = field_center(m.get_to(), is_white)?;
let dx = fx - tx;
let dy = fy - ty;
(dx.abs() >= 1.0 || dy.abs() >= 1.0).then_some((dx, dy))
})
});
view! {
<div
id={format!("field-{field_num}")}
title=corner_title
class=move || {
let staged = staged_moves.get();
@ -383,6 +434,16 @@ pub fn Board(
} else {
String::new()
};
if i == outer_idx {
if let Some((dx, dy)) = slide_delta {
return view! {
<div
class=format!("checker {color} arriving")
style=format!("--slide-dx:{dx:.1}px;--slide-dy:{dy:.1}px")
>{label}</div>
}.into_any();
}
}
view! {
<div class=format!("checker {color}")>{label}</div>
}.into_any()
@ -402,7 +463,11 @@ pub fn Board(
match bar_dice {
None => view! { <div class="bar-die-slot"></div> }.into_any(),
Some(dice_vals) => {
let die_val = if die_idx == 0 { dice_vals.0 } else { dice_vals.1 };
let die_val = if die_idx == 0 {
dice_vals.0
} else {
dice_vals.1
};
view! {
<div class="bar-die-slot">
{move || {
@ -422,6 +487,7 @@ pub fn Board(
}
};
let (tl, tr, bl, br) = if is_white {
(&TOP_LEFT_W, &TOP_RIGHT_W, &BOT_LEFT_W, &BOT_RIGHT_W)
} else {

3
client_web/src/components/game_screen.rs
View file

@ -119,6 +119,8 @@ pub fn GameScreen(state: GameUiState) -> impl IntoView {
let is_double_dice = dice.0 == dice.1 && dice.0 != 0;
let last_moves = state.last_moves;
// ── Capture for closures ───────────────────────────────────────────────────
let stage = vs.stage.clone();
let turn_stage = vs.turn_stage.clone();
@ -214,6 +216,7 @@ pub fn GameScreen(state: GameUiState) -> impl IntoView {
bar_dice=show_dice.then_some(dice)
bar_is_move=is_move_stage
bar_is_double=is_double_dice
last_moves=last_moves
/>
// ── Side panel (scoring panels only) ─────────────────────────

4
client_web/src/trictrac/types.rs
View file

@ -41,6 +41,8 @@ pub struct ViewState {
pub dice: (u8, u8),
/// Jans (scoring events) triggered by the last dice roll.
pub dice_jans: Vec<JanEntry>,
/// Last two checker moves played; default when no move has occurred yet.
pub dice_moves: (CheckerMove, CheckerMove),
}
/// One scoring event from a dice roll.
@ -73,6 +75,7 @@ impl ViewState {
],
dice: (0, 0),
dice_jans: Vec::new(),
dice_moves: (CheckerMove::default(), CheckerMove::default()),
}
}
@ -166,6 +169,7 @@ impl ViewState {
scores: [score_for(host_store_id), score_for(guest_store_id)],
dice: (gs.dice.values.0, gs.dice.values.1),
dice_jans,
dice_moves: gs.dice_moves,
}
}
}