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fix syntax

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This commit is contained in:
John Alanbrook
2026-02-17 09:15:15 -06:00
parent f310c18b84
commit 4e1b63fd0e
52 changed files with 2169 additions and 1754 deletions
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32
examples/chess/rules.cm
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@@ -1,30 +1,30 @@
/* helper – robust coord access */
function cx(c) { return c.x ?? c[0] }
function cy(c) { return c.y ?? c[1] }
/* helper -- robust coord access */
function cx(c) { return !is_null(c.x) ? c.x : c[0] }
function cy(c) { return !is_null(c.y) ? c.y : c[1] }
/* simple move-shape checks */
var deltas = {
pawn: function (pc, dx, dy, grid, to) {
pawn: function (pc, dx, dy, ctx) {
var dir = (pc.colour == 'white') ? -1 : 1;
var base = (pc.colour == 'white') ? 6 : 1;
var one = (dy == dir && dx == 0 && length(grid.at(to)) == 0);
var one = (dy == dir && dx == 0 && length(ctx.grid.at(ctx.to)) == 0);
var two = (dy == 2 * dir && dx == 0 && cy(pc.coord) == base &&
length(grid.at({ x: cx(pc.coord), y: cy(pc.coord)+dir })) == 0 &&
length(grid.at(to)) == 0);
var cap = (dy == dir && Math.abs(dx) == 1 && length(grid.at(to)));
length(ctx.grid.at({ x: cx(pc.coord), y: cy(pc.coord)+dir })) == 0 &&
length(ctx.grid.at(ctx.to)) == 0);
var cap = (dy == dir && abs(dx) == 1 && length(ctx.grid.at(ctx.to)));
return one || two || cap;
},
rook : function (pc, dx, dy) { return (dx == 0 || dy == 0); },
bishop: function (pc, dx, dy) { return Math.abs(dx) == Math.abs(dy); },
queen : function (pc, dx, dy) { return (dx == 0 || dy == 0 || Math.abs(dx) == Math.abs(dy)); },
knight: function (pc, dx, dy) { return (Math.abs(dx) == 1 && Math.abs(dy) == 2) ||
(Math.abs(dx) == 2 && Math.abs(dy) == 1); },
king : function (pc, dx, dy) { return Math.max(Math.abs(dx), Math.abs(dy)) == 1; }
bishop: function (pc, dx, dy) { return abs(dx) == abs(dy); },
queen : function (pc, dx, dy) { return (dx == 0 || dy == 0 || abs(dx) == abs(dy)); },
knight: function (pc, dx, dy) { return (abs(dx) == 1 && abs(dy) == 2) ||
(abs(dx) == 2 && abs(dy) == 1); },
king : function (pc, dx, dy) { return max(abs(dx), abs(dy)) == 1; }
};
function clearLine(from, to, grid) {
var dx = Math.sign(cx(to) - cx(from));
var dy = Math.sign(cy(to) - cy(from));
var dx = sign(cx(to) - cx(from));
var dy = sign(cy(to) - cy(from));
var x = cx(from) + dx, y = cy(from) + dy;
while (x != cx(to) || y != cy(to)) {
if (length(grid.at({ x: x, y: y }))) return false;
@@ -37,7 +37,7 @@ function canMove(piece, from, to, grid) {
var dx = cx(to) - cx(from);
var dy = cy(to) - cy(from);
var f = deltas[piece.kind];
if (!f || !f(piece, dx, dy, grid, to)) return false;
if (!f || !f(piece, dx, dy, {grid: grid, to: to})) return false;
if (piece.kind == 'knight') return true;
return clearLine(from, to, grid);
}