57 lines
1.9 KiB
Zig
57 lines
1.9 KiB
Zig
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const Grid = @import("grid.zig");
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const Piece = @import("piece.zig");
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pub fn moveRight(grid: Grid, piece: Piece) Piece {
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var new_piece = piece;
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new_piece.col += 1;
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for (new_piece.structure) |_, y| {
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for (new_piece.structure[y]) |_, x| {
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if (new_piece.structure[y][x] and
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@intCast(i32, x) + new_piece.col > Grid.ncolumns - 1) {
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return piece;
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}
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if (new_piece.structure[y][x] and
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!grid.cells[@intCast(usize, new_piece.row + @intCast(i32, y))][@intCast(usize, new_piece.col + @intCast(i32, x))].free) {
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return piece;
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}
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}
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}
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return new_piece;
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}
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pub fn moveLeft(grid: Grid, piece: Piece) Piece {
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var new_piece = piece;
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new_piece.col -= 1;
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for (new_piece.structure) |_, y| {
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for (new_piece.structure[y]) |_, x| {
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if (new_piece.structure[y][x] and
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@intCast(i32, x) + new_piece.col < 0) {
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return piece;
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}
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if (new_piece.structure[y][x] and
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!grid.cells[@intCast(usize, new_piece.row + @intCast(i32, y))][@intCast(usize, new_piece.col + @intCast(i32, x))].free) {
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return piece;
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}
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}
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}
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return new_piece;
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}
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pub fn moveDown(grid: Grid, piece: Piece) Piece {
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var new_piece = piece;
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new_piece.row += 1;
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for (new_piece.structure) |_, y| {
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for (new_piece.structure[y]) |_, x| {
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if (new_piece.structure[y][x] and
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@intCast(i32, y) + new_piece.row > Grid.nrows - 1) {
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return piece;
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}
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if (new_piece.structure[y][x] and
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!grid.cells[@intCast(usize, new_piece.row + @intCast(i32, y))][@intCast(usize, new_piece.col + @intCast(i32, x))].free) {
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return piece;
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}
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}
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}
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return new_piece;
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}
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