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remove inefficient update_positions

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This commit is contained in:
Joseph Montanaro 2022-12-31 22:47:48 -08:00
parent df4e671bc4
commit b3e7ae7900
1 changed files with 4 additions and 5 deletions
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9
src/game.rs
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@ -123,23 +123,22 @@ impl Game {
_ => (roll - 1, false), _ => (roll - 1, false),
}; };
let dst_stack = right[dst_rel_idx].assume_stack_mut(); let dst_stack = right[dst_rel_idx].assume_stack_mut();
let dst_true_idx = src_sq + 1 + dst_rel_idx; // src_sq + 1 was the original split boundary, so add the relative index to that to get the true index
if prepend { if prepend {
let slice_len = src_stack.len() - slice_start; let slice_len = src_stack.len() - slice_start;
src_stack.move_slice_under(dst_stack, slice_start); src_stack.move_slice_under(dst_stack, slice_start);
for i in 0..slice_len { for i in 0..slice_len {
self.camels[dst_stack[i]] = src_sq + dst_rel_idx + 1; self.camels[dst_stack[i]] = dst_true_idx;
} }
} }
else { else {
let dst_prev_len = dst_stack.len(); let dst_prev_len = dst_stack.len();
src_stack.move_slice(dst_stack, slice_start); src_stack.move_slice(dst_stack, slice_start);
for i in dst_prev_len..dst_stack.len() { for i in dst_prev_len..dst_stack.len() {
self.camels[dst_stack[i]] = src_sq + dst_rel_idx + 1; self.camels[dst_stack[i]] = dst_true_idx;
} }
} }
self.update_positions(dst_rel_idx);
} }
self.dice[die] = true; self.dice[die] = true;
@ -186,6 +185,6 @@ mod test {
game.advance(Purple, 1); game.advance(Purple, 1);
assert_eq!(game.dice[Purple], true); assert_eq!(game.dice[Purple], true);
assert_eq!(game.squares[3].assume_stack(), &Stack::from([Red, Purple, Yellow])); assert_eq!(game.squares[3].assume_stack(), &Stack::from([Red, Purple, Yellow]));
// B, _, G, // B, _, G, RPY
} }
} }