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Basic impl. of AI (enough completed to use/test)

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This commit is contained in:
Stephen Seo 2022-03-07 14:45:57 +09:00
parent ea2625cb48
commit 1936e5ce22
1 changed files with 43 additions and 13 deletions
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58
front_end/src/ai/mod.rs
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@ -142,18 +142,48 @@ fn get_utility_for_slot(player: Turn, slot: SlotChoice, board: &BoardType) -> Op
idx += COLS as usize; idx += COLS as usize;
} }
// check if placing a token here blocks a win // check if placing a token here is a win
if get_block_win(player, idx, board) { if get_block_amount(player.get_opposite(), idx, 3, board) {
return Some(1.0); return Some(1.0);
} }
// TODO more impl here // check if placing a token here blocks a win
if get_block_amount(player, idx, 3, board) {
Some(0.0) return Some(0.9);
} }
/// Returns true if placing a token at idx will block the opposite player from winning let mut utility: f64 = 0.5;
fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
// check if placing a token here connects 2 pieces
if get_block_amount(player.get_opposite(), idx, 2, board) {
utility *= 1.5;
if utility >= 0.8 {
utility = 0.8;
}
}
// check if placing a token here blocks 2 pieces
if get_block_amount(player, idx, 2, board) {
utility *= 1.2;
if utility >= 0.8 {
utility = 0.8;
}
}
// check if placing a token here connects 1 piece
if get_block_amount(player.get_opposite(), idx, 1, board) {
utility *= 1.09;
if utility >= 0.8 {
utility = 0.8;
}
}
Some(utility)
}
/// Returns true if placing a token at idx will block the opposite player that
/// has "amount" in a line (horizontally, vertically, and diagonally).
fn get_block_amount(player: Turn, idx: usize, amount: usize, board: &BoardType) -> bool {
let opposite = player.get_opposite(); let opposite = player.get_opposite();
// setup for checks // setup for checks
@ -165,7 +195,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx -= 1; temp_idx -= 1;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {
@ -180,7 +210,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx += 1; temp_idx += 1;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {
@ -195,7 +225,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx += COLS as usize; temp_idx += COLS as usize;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {
@ -210,7 +240,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx = temp_idx - 1 + COLS as usize; temp_idx = temp_idx - 1 + COLS as usize;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {
@ -227,7 +257,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx = temp_idx + 1 + COLS as usize; temp_idx = temp_idx + 1 + COLS as usize;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {
@ -242,7 +272,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx = temp_idx - 1 - COLS as usize; temp_idx = temp_idx - 1 - COLS as usize;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {
@ -257,7 +287,7 @@ fn get_block_win(player: Turn, idx: usize, board: &BoardType) -> bool {
temp_idx = temp_idx + 1 - COLS as usize; temp_idx = temp_idx + 1 - COLS as usize;
if board[temp_idx].get() == opposite.into() { if board[temp_idx].get() == opposite.into() {
count += 1; count += 1;
if count >= 3 { if count >= amount {
return true; return true;
} }
} else { } else {