28 lines
939 B
JavaScript
28 lines
939 B
JavaScript
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import { grid, cols, rows } from './state.js';
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import { move } from './actions.js';
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export function updateDirt(x, y, cell) {
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const below = y + 1;
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if (below >= rows) return;
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const belowCell = grid[x][below];
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if (!belowCell) {
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move(x, y, x, below);
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} else if (belowCell.type === 'water' || belowCell.type === 'acid') {
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// Fall through water or acid (slower)
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if (Math.random() < 0.2) {
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grid[x][below] = cell;
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grid[x][y] = belowCell;
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cell.updated = true;
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belowCell.updated = true;
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}
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} else {
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// Try sliding left or right
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const left = x > 0 && !grid[x - 1][below];
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const right = x < cols - 1 && !grid[x + 1][below];
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if (left && right) move(x, y, Math.random() < 0.5 ? x - 1 : x + 1, below);
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else if (left) move(x, y, x - 1, below);
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else if (right) move(x, y, x + 1, below);
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}
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}
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